./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1622782499 <...> Warning: Permanently added '10.128.1.76' (ECDSA) to the list of known hosts. execve("./syz-executor1622782499", ["./syz-executor1622782499"], 0x7ffc1ab016c0 /* 10 vars */) = 0 brk(NULL) = 0x555556c93000 brk(0x555556c93c40) = 0x555556c93c40 arch_prctl(ARCH_SET_FS, 0x555556c93300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1622782499", 4096) = 28 brk(0x555556cb4c40) = 0x555556cb4c40 brk(0x555556cb5000) = 0x555556cb5000 mprotect(0x7f3f30e4b000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 getpid() = 4998 mkdir("./syzkaller.rsfvD9", 0700) = 0 chmod("./syzkaller.rsfvD9", 0777) = 0 chdir("./syzkaller.rsfvD9") = 0 mkdir("./0", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 4999 ./strace-static-x86_64: Process 4999 attached [pid 4999] chdir("./0") = 0 [pid 4999] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4999] setpgid(0, 0) = 0 [pid 4999] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1000", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] symlink("/dev/binderfs", "./binderfs") = 0 [pid 4999] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 4999] memfd_create("syzkaller", 0) = 4 [pid 4999] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 4999] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 4999] munmap(0x7f3f2898f000, 262144) = 0 [pid 4999] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 4999] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 4999] close(4) = 0 [pid 4999] mkdir("./file1", 0777) = 0 [ 42.344581][ T4999] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4999 'syz-executor162' [ 42.361060][ T4999] loop0: detected capacity change from 0 to 512 [ 42.371101][ T4999] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.386963][ T4999] EXT4-fs (loop0): 1 truncate cleaned up [pid 4999] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 4999] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 4999] chdir("./file1") = 0 [pid 4999] ioctl(5, LOOP_CLR_FD) = 0 [pid 4999] close(5) = 0 [pid 4999] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 4999] creat("./file1", 000) = 5 [pid 4999] exit_group(0) = ? [pid 4999] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4999, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./0/binderfs") = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./0/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./0") = 0 mkdir("./1", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5003 ./strace-static-x86_64: Process 5003 attached [pid 5003] chdir("./1") = 0 [pid 5003] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5003] setpgid(0, 0) = 0 [pid 5003] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5003] write(3, "1000", 4) = 4 [pid 5003] close(3) = 0 [pid 5003] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5003] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5003] memfd_create("syzkaller", 0) = 4 [pid 5003] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5003] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5003] munmap(0x7f3f2898f000, 262144) = 0 [pid 5003] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 42.392932][ T4999] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 42.425389][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5003] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5003] close(4) = 0 [pid 5003] mkdir("./file1", 0777) = 0 [pid 5003] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5003] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5003] chdir("./file1") = 0 [pid 5003] ioctl(5, LOOP_CLR_FD) = 0 [pid 5003] close(5) = 0 [pid 5003] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5003] creat("./file1", 000) = 5 [pid 5003] exit_group(0) = ? [pid 5003] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5003, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./1/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./1/binderfs") = 0 [ 42.468558][ T5003] loop0: detected capacity change from 0 to 512 [ 42.477617][ T5003] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.492586][ T5003] EXT4-fs (loop0): 1 truncate cleaned up [ 42.498336][ T5003] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./1/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./1") = 0 mkdir("./2", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5005 attached , child_tidptr=0x555556c935d0) = 5005 [pid 5005] chdir("./2") = 0 [pid 5005] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5005] setpgid(0, 0) = 0 [pid 5005] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5005] write(3, "1000", 4) = 4 [pid 5005] close(3) = 0 [pid 5005] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5005] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5005] memfd_create("syzkaller", 0) = 4 [pid 5005] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5005] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5005] munmap(0x7f3f2898f000, 262144) = 0 [pid 5005] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5005] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5005] close(4) = 0 [pid 5005] mkdir("./file1", 0777) = 0 [ 42.524038][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 42.559641][ T5005] loop0: detected capacity change from 0 to 512 [pid 5005] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5005] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5005] chdir("./file1") = 0 [pid 5005] ioctl(5, LOOP_CLR_FD) = 0 [pid 5005] close(5) = 0 [pid 5005] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5005] creat("./file1", 000) = 5 [pid 5005] exit_group(0) = ? [pid 5005] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5005, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./2", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./2/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./2/binderfs") = 0 [ 42.568781][ T5005] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.583233][ T5005] EXT4-fs (loop0): 1 truncate cleaned up [ 42.589371][ T5005] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./2/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./2") = 0 mkdir("./3", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5007 ./strace-static-x86_64: Process 5007 attached [pid 5007] chdir("./3") = 0 [pid 5007] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5007] setpgid(0, 0) = 0 [pid 5007] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "1000", 4) = 4 [pid 5007] close(3) = 0 [pid 5007] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5007] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5007] memfd_create("syzkaller", 0) = 4 [pid 5007] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5007] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5007] munmap(0x7f3f2898f000, 262144) = 0 [pid 5007] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 42.618946][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5007] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5007] close(4) = 0 [pid 5007] mkdir("./file1", 0777) = 0 [pid 5007] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5007] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5007] chdir("./file1") = 0 [pid 5007] ioctl(5, LOOP_CLR_FD) = 0 [pid 5007] close(5) = 0 [pid 5007] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5007] creat("./file1", 000) = 5 [pid 5007] exit_group(0) = ? [pid 5007] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5007, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./3", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./3/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./3/binderfs") = 0 [ 42.660934][ T5007] loop0: detected capacity change from 0 to 512 [ 42.670040][ T5007] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.684567][ T5007] EXT4-fs (loop0): 1 truncate cleaned up [ 42.690322][ T5007] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./3/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./3") = 0 mkdir("./4", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5009 ./strace-static-x86_64: Process 5009 attached [pid 5009] chdir("./4") = 0 [pid 5009] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5009] setpgid(0, 0) = 0 [pid 5009] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5009] write(3, "1000", 4) = 4 [pid 5009] close(3) = 0 [pid 5009] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5009] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5009] memfd_create("syzkaller", 0) = 4 [pid 5009] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5009] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5009] munmap(0x7f3f2898f000, 262144) = 0 [pid 5009] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5009] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5009] close(4) = 0 [pid 5009] mkdir("./file1", 0777) = 0 [ 42.721256][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 42.754176][ T5009] loop0: detected capacity change from 0 to 512 [pid 5009] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5009] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5009] chdir("./file1") = 0 [pid 5009] ioctl(5, LOOP_CLR_FD) = 0 [pid 5009] close(5) = 0 [pid 5009] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5009] creat("./file1", 000) = 5 [pid 5009] exit_group(0) = ? [pid 5009] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5009, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./4", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./4/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./4/binderfs") = 0 umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./4/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./4") = 0 mkdir("./5", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5011 ./strace-static-x86_64: Process 5011 attached [pid 5011] chdir("./5") = 0 [pid 5011] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5011] setpgid(0, 0) = 0 [pid 5011] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5011] write(3, "1000", 4) = 4 [pid 5011] close(3) = 0 [pid 5011] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5011] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5011] memfd_create("syzkaller", 0) = 4 [pid 5011] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [ 42.762819][ T5009] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.777053][ T5009] EXT4-fs (loop0): 1 truncate cleaned up [ 42.782893][ T5009] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 42.811556][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5011] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5011] munmap(0x7f3f2898f000, 262144) = 0 [pid 5011] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5011] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5011] close(4) = 0 [pid 5011] mkdir("./file1", 0777) = 0 [pid 5011] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5011] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5011] chdir("./file1") = 0 [pid 5011] ioctl(5, LOOP_CLR_FD) = 0 [pid 5011] close(5) = 0 [pid 5011] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5011] creat("./file1", 000) = 5 [pid 5011] exit_group(0) = ? [pid 5011] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5011, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./5", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./5/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./5/binderfs") = 0 [ 42.855760][ T5011] loop0: detected capacity change from 0 to 512 [ 42.864413][ T5011] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.878874][ T5011] EXT4-fs (loop0): 1 truncate cleaned up [ 42.884648][ T5011] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./5/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./5") = 0 mkdir("./6", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5013 ./strace-static-x86_64: Process 5013 attached [pid 5013] chdir("./6") = 0 [pid 5013] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5013] setpgid(0, 0) = 0 [pid 5013] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5013] write(3, "1000", 4) = 4 [pid 5013] close(3) = 0 [pid 5013] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5013] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5013] memfd_create("syzkaller", 0) = 4 [pid 5013] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5013] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5013] munmap(0x7f3f2898f000, 262144) = 0 [pid 5013] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 42.911936][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5013] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5013] close(4) = 0 [pid 5013] mkdir("./file1", 0777) = 0 [pid 5013] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5013] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5013] chdir("./file1") = 0 [pid 5013] ioctl(5, LOOP_CLR_FD) = 0 [pid 5013] close(5) = 0 [pid 5013] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5013] creat("./file1", 000) = 5 [pid 5013] exit_group(0) = ? [pid 5013] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5013, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./6", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./6/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./6/binderfs") = 0 [ 42.952783][ T5013] loop0: detected capacity change from 0 to 512 [ 42.962475][ T5013] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.977821][ T5013] EXT4-fs (loop0): 1 truncate cleaned up [ 42.983506][ T5013] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./6/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./6") = 0 mkdir("./7", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5015 ./strace-static-x86_64: Process 5015 attached [pid 5015] chdir("./7") = 0 [pid 5015] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5015] setpgid(0, 0) = 0 [pid 5015] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5015] write(3, "1000", 4) = 4 [pid 5015] close(3) = 0 [pid 5015] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5015] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5015] memfd_create("syzkaller", 0) = 4 [pid 5015] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5015] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5015] munmap(0x7f3f2898f000, 262144) = 0 [pid 5015] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5015] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5015] close(4) = 0 [pid 5015] mkdir("./file1", 0777) = 0 [ 43.009102][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 43.048846][ T5015] loop0: detected capacity change from 0 to 512 [pid 5015] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5015] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5015] chdir("./file1") = 0 [pid 5015] ioctl(5, LOOP_CLR_FD) = 0 [pid 5015] close(5) = 0 [pid 5015] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5015] creat("./file1", 000) = 5 [pid 5015] exit_group(0) = ? [pid 5015] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5015, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./7", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./7/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./7/binderfs") = 0 [ 43.057648][ T5015] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.071537][ T5015] EXT4-fs (loop0): 1 truncate cleaned up [ 43.077255][ T5015] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./7/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./7") = 0 mkdir("./8", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5017 ./strace-static-x86_64: Process 5017 attached [pid 5017] chdir("./8") = 0 [pid 5017] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5017] setpgid(0, 0) = 0 [pid 5017] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5017] write(3, "1000", 4) = 4 [pid 5017] close(3) = 0 [pid 5017] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5017] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5017] memfd_create("syzkaller", 0) = 4 [pid 5017] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5017] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5017] munmap(0x7f3f2898f000, 262144) = 0 [pid 5017] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 43.107395][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5017] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5017] close(4) = 0 [pid 5017] mkdir("./file1", 0777) = 0 [pid 5017] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5017] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5017] chdir("./file1") = 0 [pid 5017] ioctl(5, LOOP_CLR_FD) = 0 [pid 5017] close(5) = 0 [pid 5017] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5017] creat("./file1", 000) = 5 [pid 5017] exit_group(0) = ? [pid 5017] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5017, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./8", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./8/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./8/binderfs") = 0 [ 43.151725][ T5017] loop0: detected capacity change from 0 to 512 [ 43.160779][ T5017] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.174974][ T5017] EXT4-fs (loop0): 1 truncate cleaned up [ 43.180915][ T5017] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./8/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./8") = 0 mkdir("./9", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5019 attached [pid 5019] chdir("./9") = 0 [pid 5019] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5019] setpgid(0, 0) = 0 [pid 5019] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5019] write(3, "1000", 4) = 4 [pid 5019] close(3) = 0 [pid 5019] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5019] openat(AT_FDCWD, "/dev/fuse", O_RDWR [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5019 [pid 5019] <... openat resumed>) = 3 [pid 5019] memfd_create("syzkaller", 0) = 4 [pid 5019] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5019] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5019] munmap(0x7f3f2898f000, 262144) = 0 [pid 5019] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5019] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5019] close(4) = 0 [pid 5019] mkdir("./file1", 0777) = 0 [ 43.209339][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 43.249575][ T5019] loop0: detected capacity change from 0 to 512 [pid 5019] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5019] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5019] chdir("./file1") = 0 [pid 5019] ioctl(5, LOOP_CLR_FD) = 0 [pid 5019] close(5) = 0 [pid 5019] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5019] creat("./file1", 000) = 5 [pid 5019] exit_group(0) = ? [pid 5019] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5019, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./9", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./9/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./9/binderfs") = 0 [ 43.258518][ T5019] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.272405][ T5019] EXT4-fs (loop0): 1 truncate cleaned up [ 43.278186][ T5019] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./9/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./9") = 0 mkdir("./10", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5021 ./strace-static-x86_64: Process 5021 attached [pid 5021] chdir("./10") = 0 [pid 5021] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5021] setpgid(0, 0) = 0 [pid 5021] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5021] write(3, "1000", 4) = 4 [pid 5021] close(3) = 0 [pid 5021] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5021] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5021] memfd_create("syzkaller", 0) = 4 [pid 5021] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5021] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5021] munmap(0x7f3f2898f000, 262144) = 0 [pid 5021] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 43.305240][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5021] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5021] close(4) = 0 [pid 5021] mkdir("./file1", 0777) = 0 [pid 5021] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5021] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5021] chdir("./file1") = 0 [pid 5021] ioctl(5, LOOP_CLR_FD) = 0 [pid 5021] close(5) = 0 [pid 5021] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5021] creat("./file1", 000) = 5 [pid 5021] exit_group(0) = ? [pid 5021] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5021, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./10", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./10/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./10/binderfs") = 0 [ 43.350802][ T5021] loop0: detected capacity change from 0 to 512 [ 43.360467][ T5021] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.375834][ T5021] EXT4-fs (loop0): 1 truncate cleaned up [ 43.381728][ T5021] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./10/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./10") = 0 mkdir("./11", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5023 ./strace-static-x86_64: Process 5023 attached [pid 5023] chdir("./11") = 0 [pid 5023] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5023] setpgid(0, 0) = 0 [pid 5023] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5023] write(3, "1000", 4) = 4 [pid 5023] close(3) = 0 [pid 5023] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5023] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5023] memfd_create("syzkaller", 0) = 4 [pid 5023] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5023] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5023] munmap(0x7f3f2898f000, 262144) = 0 [pid 5023] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5023] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5023] close(4) = 0 [pid 5023] mkdir("./file1", 0777) = 0 [ 43.405113][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 43.440654][ T5023] loop0: detected capacity change from 0 to 512 [pid 5023] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5023] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5023] chdir("./file1") = 0 [pid 5023] ioctl(5, LOOP_CLR_FD) = 0 [pid 5023] close(5) = 0 [pid 5023] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5023] creat("./file1", 000) = 5 [pid 5023] exit_group(0) = ? [pid 5023] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5023, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./11", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./11/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./11/binderfs") = 0 [ 43.449256][ T5023] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.463311][ T5023] EXT4-fs (loop0): 1 truncate cleaned up [ 43.469166][ T5023] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 43.496916][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./11/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./11") = 0 mkdir("./12", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5025 ./strace-static-x86_64: Process 5025 attached [pid 5025] chdir("./12") = 0 [pid 5025] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5025] setpgid(0, 0) = 0 [pid 5025] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5025] write(3, "1000", 4) = 4 [pid 5025] close(3) = 0 [pid 5025] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5025] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5025] memfd_create("syzkaller", 0) = 4 [pid 5025] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5025] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5025] munmap(0x7f3f2898f000, 262144) = 0 [pid 5025] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5025] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5025] close(4) = 0 [pid 5025] mkdir("./file1", 0777) = 0 [pid 5025] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5025] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5025] chdir("./file1") = 0 [pid 5025] ioctl(5, LOOP_CLR_FD) = 0 [pid 5025] close(5) = 0 [pid 5025] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5025] creat("./file1", 000) = 5 [pid 5025] exit_group(0) = ? [pid 5025] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5025, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./12/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./12/binderfs") = 0 [ 43.542166][ T5025] loop0: detected capacity change from 0 to 512 [ 43.551187][ T5025] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.565888][ T5025] EXT4-fs (loop0): 1 truncate cleaned up [ 43.572080][ T5025] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./12/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./12") = 0 mkdir("./13", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5027 ./strace-static-x86_64: Process 5027 attached [pid 5027] chdir("./13") = 0 [pid 5027] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5027] setpgid(0, 0) = 0 [pid 5027] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5027] write(3, "1000", 4) = 4 [pid 5027] close(3) = 0 [pid 5027] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5027] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5027] memfd_create("syzkaller", 0) = 4 [pid 5027] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5027] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5027] munmap(0x7f3f2898f000, 262144) = 0 [pid 5027] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 43.599686][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5027] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5027] close(4) = 0 [pid 5027] mkdir("./file1", 0777) = 0 [pid 5027] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5027] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5027] chdir("./file1") = 0 [pid 5027] ioctl(5, LOOP_CLR_FD) = 0 [pid 5027] close(5) = 0 [pid 5027] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5027] creat("./file1", 000) = 5 [pid 5027] exit_group(0) = ? [pid 5027] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5027, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./13", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./13/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./13/binderfs") = 0 [ 43.642681][ T5027] loop0: detected capacity change from 0 to 512 [ 43.651168][ T5027] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.665867][ T5027] EXT4-fs (loop0): 1 truncate cleaned up [ 43.671923][ T5027] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./13/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./13") = 0 mkdir("./14", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5029 ./strace-static-x86_64: Process 5029 attached [pid 5029] chdir("./14") = 0 [pid 5029] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5029] setpgid(0, 0) = 0 [pid 5029] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5029] write(3, "1000", 4) = 4 [pid 5029] close(3) = 0 [pid 5029] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5029] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5029] memfd_create("syzkaller", 0) = 4 [pid 5029] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5029] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5029] munmap(0x7f3f2898f000, 262144) = 0 [pid 5029] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 43.701627][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5029] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5029] close(4) = 0 [pid 5029] mkdir("./file1", 0777) = 0 [pid 5029] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5029] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5029] chdir("./file1") = 0 [pid 5029] ioctl(5, LOOP_CLR_FD) = 0 [pid 5029] close(5) = 0 [pid 5029] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5029] creat("./file1", 000) = 5 [pid 5029] exit_group(0) = ? [pid 5029] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5029, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./14", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./14/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./14/binderfs") = 0 [ 43.742872][ T5029] loop0: detected capacity change from 0 to 512 [ 43.751548][ T5029] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.765501][ T5029] EXT4-fs (loop0): 1 truncate cleaned up [ 43.771268][ T5029] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./14/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./14") = 0 mkdir("./15", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5031 ./strace-static-x86_64: Process 5031 attached [pid 5031] chdir("./15") = 0 [pid 5031] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5031] setpgid(0, 0) = 0 [pid 5031] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5031] write(3, "1000", 4) = 4 [pid 5031] close(3) = 0 [pid 5031] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5031] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5031] memfd_create("syzkaller", 0) = 4 [pid 5031] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5031] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5031] munmap(0x7f3f2898f000, 262144) = 0 [pid 5031] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5031] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5031] close(4) = 0 [pid 5031] mkdir("./file1", 0777) = 0 [ 43.802532][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 43.831143][ T5031] loop0: detected capacity change from 0 to 512 [ 43.840086][ T5031] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5031] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5031] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5031] chdir("./file1") = 0 [pid 5031] ioctl(5, LOOP_CLR_FD) = 0 [pid 5031] close(5) = 0 [pid 5031] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5031] creat("./file1", 000) = 5 [pid 5031] exit_group(0) = ? [pid 5031] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5031, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./15", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./15/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./15/binderfs") = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./15/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./15/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./15") = 0 mkdir("./16", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5033 ./strace-static-x86_64: Process 5033 attached [pid 5033] chdir("./16") = 0 [pid 5033] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5033] setpgid(0, 0) = 0 [pid 5033] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5033] write(3, "1000", 4) = 4 [pid 5033] close(3) = 0 [pid 5033] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5033] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5033] memfd_create("syzkaller", 0) = 4 [pid 5033] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5033] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5033] munmap(0x7f3f2898f000, 262144) = 0 [pid 5033] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 43.853550][ T5031] EXT4-fs (loop0): 1 truncate cleaned up [ 43.859390][ T5031] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 43.880942][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5033] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5033] close(4) = 0 [pid 5033] mkdir("./file1", 0777) = 0 [pid 5033] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5033] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5033] chdir("./file1") = 0 [pid 5033] ioctl(5, LOOP_CLR_FD) = 0 [pid 5033] close(5) = 0 [pid 5033] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5033] creat("./file1", 000) = 5 [pid 5033] exit_group(0) = ? [pid 5033] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5033, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./16/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./16/binderfs") = 0 [ 43.909774][ T5033] loop0: detected capacity change from 0 to 512 [ 43.918111][ T5033] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 43.932072][ T5033] EXT4-fs (loop0): 1 truncate cleaned up [ 43.937805][ T5033] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./16/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./16") = 0 mkdir("./17", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5035 ./strace-static-x86_64: Process 5035 attached [pid 5035] chdir("./17") = 0 [pid 5035] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5035] setpgid(0, 0) = 0 [pid 5035] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5035] write(3, "1000", 4) = 4 [pid 5035] close(3) = 0 [pid 5035] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5035] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5035] memfd_create("syzkaller", 0) = 4 [pid 5035] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5035] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5035] munmap(0x7f3f2898f000, 262144) = 0 [pid 5035] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5035] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5035] close(4) = 0 [pid 5035] mkdir("./file1", 0777) = 0 [ 43.961006][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 43.998146][ T5035] loop0: detected capacity change from 0 to 512 [pid 5035] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5035] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5035] chdir("./file1") = 0 [pid 5035] ioctl(5, LOOP_CLR_FD) = 0 [pid 5035] close(5) = 0 [pid 5035] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5035] creat("./file1", 000) = 5 [pid 5035] exit_group(0) = ? [pid 5035] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5035, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./17", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./17/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./17/binderfs") = 0 [ 44.006239][ T5035] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.020205][ T5035] EXT4-fs (loop0): 1 truncate cleaned up [ 44.025936][ T5035] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./17/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./17") = 0 mkdir("./18", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5037 ./strace-static-x86_64: Process 5037 attached [pid 5037] chdir("./18") = 0 [pid 5037] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5037] setpgid(0, 0) = 0 [pid 5037] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5037] write(3, "1000", 4) = 4 [pid 5037] close(3) = 0 [pid 5037] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5037] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5037] memfd_create("syzkaller", 0) = 4 [pid 5037] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5037] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5037] munmap(0x7f3f2898f000, 262144) = 0 [pid 5037] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 44.057480][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5037] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5037] close(4) = 0 [pid 5037] mkdir("./file1", 0777) = 0 [pid 5037] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5037] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5037] chdir("./file1") = 0 [pid 5037] ioctl(5, LOOP_CLR_FD) = 0 [pid 5037] close(5) = 0 [pid 5037] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5037] creat("./file1", 000) = 5 [pid 5037] exit_group(0) = ? [pid 5037] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5037, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./18", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./18/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./18/binderfs") = 0 [ 44.095343][ T5037] loop0: detected capacity change from 0 to 512 [ 44.104873][ T5037] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.118774][ T5037] EXT4-fs (loop0): 1 truncate cleaned up [ 44.124417][ T5037] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./18/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./18") = 0 mkdir("./19", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5039 ./strace-static-x86_64: Process 5039 attached [pid 5039] chdir("./19") = 0 [pid 5039] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5039] setpgid(0, 0) = 0 [pid 5039] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5039] write(3, "1000", 4) = 4 [pid 5039] close(3) = 0 [pid 5039] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5039] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5039] memfd_create("syzkaller", 0) = 4 [pid 5039] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5039] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5039] munmap(0x7f3f2898f000, 262144) = 0 [pid 5039] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5039] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5039] close(4) = 0 [pid 5039] mkdir("./file1", 0777) = 0 [ 44.149296][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 44.186705][ T5039] loop0: detected capacity change from 0 to 512 [pid 5039] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5039] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5039] chdir("./file1") = 0 [pid 5039] ioctl(5, LOOP_CLR_FD) = 0 [pid 5039] close(5) = 0 [pid 5039] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5039] creat("./file1", 000) = 5 [pid 5039] exit_group(0) = ? [pid 5039] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5039, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./19/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./19/binderfs") = 0 [ 44.197172][ T5039] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.211455][ T5039] EXT4-fs (loop0): 1 truncate cleaned up [ 44.217273][ T5039] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./19/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./19") = 0 mkdir("./20", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5041 attached , child_tidptr=0x555556c935d0) = 5041 [pid 5041] chdir("./20") = 0 [pid 5041] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5041] setpgid(0, 0) = 0 [pid 5041] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5041] write(3, "1000", 4) = 4 [pid 5041] close(3) = 0 [pid 5041] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5041] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5041] memfd_create("syzkaller", 0) = 4 [pid 5041] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5041] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5041] munmap(0x7f3f2898f000, 262144) = 0 [pid 5041] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 44.244972][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5041] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5041] close(4) = 0 [pid 5041] mkdir("./file1", 0777) = 0 [pid 5041] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5041] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5041] chdir("./file1") = 0 [pid 5041] ioctl(5, LOOP_CLR_FD) = 0 [pid 5041] close(5) = 0 [pid 5041] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5041] creat("./file1", 000) = 5 [pid 5041] exit_group(0) = ? [pid 5041] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5041, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./20", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./20/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./20/binderfs") = 0 [ 44.286613][ T5041] loop0: detected capacity change from 0 to 512 [ 44.295831][ T5041] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.309949][ T5041] EXT4-fs (loop0): 1 truncate cleaned up [ 44.315591][ T5041] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./20/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./20") = 0 mkdir("./21", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5043 ./strace-static-x86_64: Process 5043 attached [pid 5043] chdir("./21") = 0 [pid 5043] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5043] setpgid(0, 0) = 0 [pid 5043] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5043] write(3, "1000", 4) = 4 [pid 5043] close(3) = 0 [pid 5043] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5043] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5043] memfd_create("syzkaller", 0) = 4 [pid 5043] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5043] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5043] munmap(0x7f3f2898f000, 262144) = 0 [pid 5043] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5043] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5043] close(4) = 0 [pid 5043] mkdir("./file1", 0777) = 0 [ 44.341601][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 44.370364][ T5043] loop0: detected capacity change from 0 to 512 [ 44.380649][ T5043] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5043] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5043] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5043] chdir("./file1") = 0 [pid 5043] ioctl(5, LOOP_CLR_FD) = 0 [pid 5043] close(5) = 0 [pid 5043] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5043] creat("./file1", 000) = 5 [pid 5043] exit_group(0) = ? [pid 5043] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5043, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./21", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./21/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./21/binderfs") = 0 umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./21/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./21") = 0 mkdir("./22", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5045 ./strace-static-x86_64: Process 5045 attached [pid 5045] chdir("./22") = 0 [pid 5045] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5045] setpgid(0, 0) = 0 [pid 5045] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5045] write(3, "1000", 4) = 4 [pid 5045] close(3) = 0 [pid 5045] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5045] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [ 44.394266][ T5043] EXT4-fs (loop0): 1 truncate cleaned up [ 44.400000][ T5043] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 44.429823][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5045] memfd_create("syzkaller", 0) = 4 [pid 5045] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5045] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5045] munmap(0x7f3f2898f000, 262144) = 0 [pid 5045] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5045] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5045] close(4) = 0 [pid 5045] mkdir("./file1", 0777) = 0 [pid 5045] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5045] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5045] chdir("./file1") = 0 [pid 5045] ioctl(5, LOOP_CLR_FD) = 0 [pid 5045] close(5) = 0 [pid 5045] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5045] creat("./file1", 000) = 5 [pid 5045] exit_group(0) = ? [pid 5045] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5045, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./22/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./22/binderfs") = 0 [ 44.480405][ T5045] loop0: detected capacity change from 0 to 512 [ 44.489042][ T5045] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.502736][ T5045] EXT4-fs (loop0): 1 truncate cleaned up [ 44.508469][ T5045] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./22/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./22") = 0 mkdir("./23", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5047 attached [pid 5047] chdir("./23") = 0 [pid 5047] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5047] setpgid(0, 0) = 0 [pid 5047] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5047] write(3, "1000", 4) = 4 [pid 5047] close(3) = 0 [pid 5047] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5047] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5047] memfd_create("syzkaller", 0) = 4 [pid 5047] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5047 [pid 5047] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5047] munmap(0x7f3f2898f000, 262144) = 0 [pid 5047] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5047] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5047] close(4) = 0 [pid 5047] mkdir("./file1", 0777) = 0 [ 44.535599][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 44.574910][ T5047] loop0: detected capacity change from 0 to 512 [pid 5047] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5047] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5047] chdir("./file1") = 0 [pid 5047] ioctl(5, LOOP_CLR_FD) = 0 [pid 5047] close(5) = 0 [pid 5047] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5047] creat("./file1", 000) = 5 [pid 5047] exit_group(0) = ? [pid 5047] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5047, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./23", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./23/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./23/binderfs") = 0 [ 44.585081][ T5047] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.599405][ T5047] EXT4-fs (loop0): 1 truncate cleaned up [ 44.605091][ T5047] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./23/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./23") = 0 mkdir("./24", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5049 attached , child_tidptr=0x555556c935d0) = 5049 [pid 5049] chdir("./24") = 0 [pid 5049] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5049] setpgid(0, 0) = 0 [pid 5049] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5049] write(3, "1000", 4) = 4 [pid 5049] close(3) = 0 [pid 5049] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5049] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5049] memfd_create("syzkaller", 0) = 4 [pid 5049] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5049] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5049] munmap(0x7f3f2898f000, 262144) = 0 [pid 5049] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5049] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5049] close(4) = 0 [pid 5049] mkdir("./file1", 0777) = 0 [ 44.633656][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 44.673823][ T5049] loop0: detected capacity change from 0 to 512 [pid 5049] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5049] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5049] chdir("./file1") = 0 [pid 5049] ioctl(5, LOOP_CLR_FD) = 0 [pid 5049] close(5) = 0 [pid 5049] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5049] creat("./file1", 000) = 5 [pid 5049] exit_group(0) = ? [pid 5049] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5049, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./24", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./24/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./24/binderfs") = 0 [ 44.682742][ T5049] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.697470][ T5049] EXT4-fs (loop0): 1 truncate cleaned up [ 44.703290][ T5049] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./24/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./24") = 0 mkdir("./25", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5051 attached [pid 5051] chdir("./25") = 0 [pid 5051] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5051] setpgid(0, 0) = 0 [pid 5051] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "1000", 4) = 4 [pid 5051] close(3) = 0 [pid 5051] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5051] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5051 [pid 5051] memfd_create("syzkaller", 0) = 4 [pid 5051] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5051] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [ 44.731910][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5051] munmap(0x7f3f2898f000, 262144) = 0 [pid 5051] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5051] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5051] close(4) = 0 [pid 5051] mkdir("./file1", 0777) = 0 [pid 5051] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5051] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5051] chdir("./file1") = 0 [pid 5051] ioctl(5, LOOP_CLR_FD) = 0 [pid 5051] close(5) = 0 [pid 5051] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5051] creat("./file1", 000) = 5 [pid 5051] exit_group(0) = ? [pid 5051] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5051, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./25", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./25/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./25/binderfs") = 0 [ 44.767532][ T5051] loop0: detected capacity change from 0 to 512 [ 44.777641][ T5051] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.791580][ T5051] EXT4-fs (loop0): 1 truncate cleaned up [ 44.797345][ T5051] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./25/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./25") = 0 mkdir("./26", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5053 ./strace-static-x86_64: Process 5053 attached [pid 5053] chdir("./26") = 0 [pid 5053] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5053] setpgid(0, 0) = 0 [pid 5053] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5053] write(3, "1000", 4) = 4 [pid 5053] close(3) = 0 [pid 5053] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5053] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5053] memfd_create("syzkaller", 0) = 4 [pid 5053] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5053] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5053] munmap(0x7f3f2898f000, 262144) = 0 [pid 5053] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 44.819819][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5053] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5053] close(4) = 0 [pid 5053] mkdir("./file1", 0777) = 0 [pid 5053] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5053] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5053] chdir("./file1") = 0 [pid 5053] ioctl(5, LOOP_CLR_FD) = 0 [pid 5053] close(5) = 0 [pid 5053] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5053] creat("./file1", 000) = 5 [pid 5053] exit_group(0) = ? [pid 5053] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5053, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./26", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./26/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./26/binderfs") = 0 [ 44.863051][ T5053] loop0: detected capacity change from 0 to 512 [ 44.872071][ T5053] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 44.885947][ T5053] EXT4-fs (loop0): 1 truncate cleaned up [ 44.891613][ T5053] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./26/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./26") = 0 mkdir("./27", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5055 ./strace-static-x86_64: Process 5055 attached [pid 5055] chdir("./27") = 0 [pid 5055] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5055] setpgid(0, 0) = 0 [pid 5055] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1000", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5055] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5055] memfd_create("syzkaller", 0) = 4 [pid 5055] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5055] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5055] munmap(0x7f3f2898f000, 262144) = 0 [pid 5055] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5055] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5055] close(4) = 0 [pid 5055] mkdir("./file1", 0777) = 0 [ 44.919930][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 44.948047][ T5055] loop0: detected capacity change from 0 to 512 [ 44.957674][ T5055] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5055] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5055] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5055] chdir("./file1") = 0 [pid 5055] ioctl(5, LOOP_CLR_FD) = 0 [pid 5055] close(5) = 0 [pid 5055] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5055] creat("./file1", 000) = 5 [pid 5055] exit_group(0) = ? [pid 5055] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5055, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./27", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./27/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./27/binderfs") = 0 umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./27/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./27") = 0 mkdir("./28", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5057 ./strace-static-x86_64: Process 5057 attached [pid 5057] chdir("./28") = 0 [pid 5057] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5057] setpgid(0, 0) = 0 [pid 5057] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5057] write(3, "1000", 4) = 4 [pid 5057] close(3) = 0 [pid 5057] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5057] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5057] memfd_create("syzkaller", 0) = 4 [pid 5057] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5057] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5057] munmap(0x7f3f2898f000, 262144) = 0 [pid 5057] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 44.970954][ T5055] EXT4-fs (loop0): 1 truncate cleaned up [ 44.976658][ T5055] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 45.006867][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5057] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5057] close(4) = 0 [pid 5057] mkdir("./file1", 0777) = 0 [pid 5057] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5057] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5057] chdir("./file1") = 0 [pid 5057] ioctl(5, LOOP_CLR_FD) = 0 [pid 5057] close(5) = 0 [pid 5057] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5057] creat("./file1", 000) = 5 [pid 5057] exit_group(0) = ? [pid 5057] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5057, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./28", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./28/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./28/binderfs") = 0 [ 45.035876][ T5057] loop0: detected capacity change from 0 to 512 [ 45.045165][ T5057] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.058496][ T5057] EXT4-fs (loop0): 1 truncate cleaned up [ 45.064117][ T5057] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./28/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./28") = 0 mkdir("./29", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5059 ./strace-static-x86_64: Process 5059 attached [pid 5059] chdir("./29") = 0 [pid 5059] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5059] setpgid(0, 0) = 0 [pid 5059] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "1000", 4) = 4 [pid 5059] close(3) = 0 [pid 5059] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5059] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5059] memfd_create("syzkaller", 0) = 4 [pid 5059] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5059] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5059] munmap(0x7f3f2898f000, 262144) = 0 [pid 5059] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5059] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5059] close(4) = 0 [pid 5059] mkdir("./file1", 0777) = 0 [ 45.094937][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 45.127848][ T5059] loop0: detected capacity change from 0 to 512 [pid 5059] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5059] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5059] chdir("./file1") = 0 [pid 5059] ioctl(5, LOOP_CLR_FD) = 0 [pid 5059] close(5) = 0 [pid 5059] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5059] creat("./file1", 000) = 5 [pid 5059] exit_group(0) = ? [pid 5059] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5059, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./29", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./29/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./29/binderfs") = 0 [ 45.136125][ T5059] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.149993][ T5059] EXT4-fs (loop0): 1 truncate cleaned up [ 45.155631][ T5059] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./29/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./29") = 0 mkdir("./30", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5061 ./strace-static-x86_64: Process 5061 attached [pid 5061] chdir("./30") = 0 [pid 5061] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5061] setpgid(0, 0) = 0 [pid 5061] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1000", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5061] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5061] memfd_create("syzkaller", 0) = 4 [pid 5061] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5061] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5061] munmap(0x7f3f2898f000, 262144) = 0 [pid 5061] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.187285][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5061] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5061] close(4) = 0 [pid 5061] mkdir("./file1", 0777) = 0 [pid 5061] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5061] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5061] chdir("./file1") = 0 [pid 5061] ioctl(5, LOOP_CLR_FD) = 0 [pid 5061] close(5) = 0 [pid 5061] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5061] creat("./file1", 000) = 5 [pid 5061] exit_group(0) = ? [pid 5061] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5061, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./30/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./30/binderfs") = 0 [ 45.233850][ T5061] loop0: detected capacity change from 0 to 512 [ 45.242966][ T5061] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.256955][ T5061] EXT4-fs (loop0): 1 truncate cleaned up [ 45.262619][ T5061] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./30/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./30") = 0 mkdir("./31", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5063 attached , child_tidptr=0x555556c935d0) = 5063 [pid 5063] chdir("./31") = 0 [pid 5063] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5063] setpgid(0, 0) = 0 [pid 5063] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1000", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5063] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5063] memfd_create("syzkaller", 0) = 4 [pid 5063] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5063] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5063] munmap(0x7f3f2898f000, 262144) = 0 [pid 5063] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.291010][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5063] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5063] close(4) = 0 [pid 5063] mkdir("./file1", 0777) = 0 [pid 5063] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5063] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5063] chdir("./file1") = 0 [pid 5063] ioctl(5, LOOP_CLR_FD) = 0 [pid 5063] close(5) = 0 [pid 5063] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5063] creat("./file1", 000) = 5 [pid 5063] exit_group(0) = ? [pid 5063] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5063, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./31/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 [ 45.333560][ T5063] loop0: detected capacity change from 0 to 512 [ 45.342158][ T5063] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.357285][ T5063] EXT4-fs (loop0): 1 truncate cleaned up [ 45.362970][ T5063] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. unlink("./31/binderfs") = 0 umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./31/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./31") = 0 mkdir("./32", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5065 attached , child_tidptr=0x555556c935d0) = 5065 [pid 5065] chdir("./32") = 0 [pid 5065] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5065] setpgid(0, 0) = 0 [pid 5065] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "1000", 4) = 4 [pid 5065] close(3) = 0 [pid 5065] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5065] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5065] memfd_create("syzkaller", 0) = 4 [pid 5065] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5065] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5065] munmap(0x7f3f2898f000, 262144) = 0 [pid 5065] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.389292][ T4998] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5065] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5065] close(4) = 0 [pid 5065] mkdir("./file1", 0777) = 0 [pid 5065] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5065] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5065] chdir("./file1") = 0 [pid 5065] ioctl(5, LOOP_CLR_FD) = 0 [pid 5065] close(5) = 0 [pid 5065] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5065] creat("./file1", 000) = 5 [pid 5065] exit_group(0) = ? [pid 5065] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5065, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./32", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./32/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./32/binderfs") = 0 umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./32/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./32") = 0 mkdir("./33", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5067 attached , child_tidptr=0x555556c935d0) = 5067 [pid 5067] chdir("./33") = 0 [pid 5067] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5067] setpgid(0, 0) = 0 [pid 5067] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1000", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5067] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5067] memfd_create("syzkaller", 0) = 4 [pid 5067] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5067] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5067] munmap(0x7f3f2898f000, 262144) = 0 [pid 5067] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.438722][ T5065] loop0: detected capacity change from 0 to 512 [ 45.448180][ T5065] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.462268][ T5065] EXT4-fs (loop0): 1 truncate cleaned up [pid 5067] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5067] close(4) = 0 [pid 5067] mkdir("./file1", 0777) = 0 [pid 5067] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5067] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5067] chdir("./file1") = 0 [pid 5067] ioctl(5, LOOP_CLR_FD) = 0 [pid 5067] close(5) = 0 [pid 5067] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5067] creat("./file1", 000) = 5 [pid 5067] exit_group(0) = ? [pid 5067] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5067, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./33", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./33/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./33/binderfs") = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./33/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./33/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./33") = 0 mkdir("./34", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5069 ./strace-static-x86_64: Process 5069 attached [pid 5069] chdir("./34") = 0 [pid 5069] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5069] setpgid(0, 0) = 0 [pid 5069] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1000", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5069] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5069] memfd_create("syzkaller", 0) = 4 [pid 5069] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5069] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5069] munmap(0x7f3f2898f000, 262144) = 0 [pid 5069] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.517938][ T5067] loop0: detected capacity change from 0 to 512 [ 45.526234][ T5067] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.540216][ T5067] EXT4-fs (loop0): 1 truncate cleaned up [pid 5069] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5069] close(4) = 0 [pid 5069] mkdir("./file1", 0777) = 0 [pid 5069] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5069] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5069] chdir("./file1") = 0 [pid 5069] ioctl(5, LOOP_CLR_FD) = 0 [pid 5069] close(5) = 0 [pid 5069] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5069] creat("./file1", 000) = 5 [pid 5069] exit_group(0) = ? [pid 5069] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5069, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./34", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./34/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./34/binderfs") = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./34/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./34") = 0 mkdir("./35", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5071 ./strace-static-x86_64: Process 5071 attached [pid 5071] chdir("./35") = 0 [pid 5071] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5071] setpgid(0, 0) = 0 [pid 5071] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5071] write(3, "1000", 4) = 4 [pid 5071] close(3) = 0 [pid 5071] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5071] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5071] memfd_create("syzkaller", 0) = 4 [pid 5071] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5071] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5071] munmap(0x7f3f2898f000, 262144) = 0 [pid 5071] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.594874][ T5069] loop0: detected capacity change from 0 to 512 [ 45.603573][ T5069] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.618508][ T5069] EXT4-fs (loop0): 1 truncate cleaned up [pid 5071] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5071] close(4) = 0 [pid 5071] mkdir("./file1", 0777) = 0 [pid 5071] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5071] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5071] chdir("./file1") = 0 [pid 5071] ioctl(5, LOOP_CLR_FD) = 0 [pid 5071] close(5) = 0 [pid 5071] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5071] creat("./file1", 000) = 5 [pid 5071] exit_group(0) = ? [pid 5071] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5071, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./35", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./35/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./35/binderfs") = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./35/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./35/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./35") = 0 mkdir("./36", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5073 ./strace-static-x86_64: Process 5073 attached [pid 5073] chdir("./36") = 0 [pid 5073] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5073] setpgid(0, 0) = 0 [pid 5073] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5073] write(3, "1000", 4) = 4 [pid 5073] close(3) = 0 [pid 5073] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5073] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5073] memfd_create("syzkaller", 0) = 4 [pid 5073] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5073] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5073] munmap(0x7f3f2898f000, 262144) = 0 [pid 5073] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.670868][ T5071] loop0: detected capacity change from 0 to 512 [ 45.680694][ T5071] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.694665][ T5071] EXT4-fs (loop0): 1 truncate cleaned up [pid 5073] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5073] close(4) = 0 [pid 5073] mkdir("./file1", 0777) = 0 [pid 5073] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5073] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5073] chdir("./file1") = 0 [pid 5073] ioctl(5, LOOP_CLR_FD) = 0 [pid 5073] close(5) = 0 [pid 5073] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5073] creat("./file1", 000) = 5 [pid 5073] exit_group(0) = ? [pid 5073] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5073, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./36", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./36/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./36/binderfs") = 0 umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./36/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./36") = 0 mkdir("./37", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5075 ./strace-static-x86_64: Process 5075 attached [pid 5075] chdir("./37") = 0 [pid 5075] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5075] setpgid(0, 0) = 0 [pid 5075] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "1000", 4) = 4 [pid 5075] close(3) = 0 [pid 5075] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5075] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5075] memfd_create("syzkaller", 0) = 4 [pid 5075] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5075] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5075] munmap(0x7f3f2898f000, 262144) = 0 [pid 5075] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.741704][ T5073] loop0: detected capacity change from 0 to 512 [ 45.751040][ T5073] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.765109][ T5073] EXT4-fs (loop0): 1 truncate cleaned up [pid 5075] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5075] close(4) = 0 [pid 5075] mkdir("./file1", 0777) = 0 [pid 5075] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5075] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5075] chdir("./file1") = 0 [pid 5075] ioctl(5, LOOP_CLR_FD) = 0 [pid 5075] close(5) = 0 [pid 5075] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5075] creat("./file1", 000) = 5 [pid 5075] exit_group(0) = ? [pid 5075] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5075, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./37", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./37/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./37/binderfs") = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./37/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./37") = 0 mkdir("./38", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5077 ./strace-static-x86_64: Process 5077 attached [pid 5077] chdir("./38") = 0 [pid 5077] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5077] setpgid(0, 0) = 0 [pid 5077] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5077] write(3, "1000", 4) = 4 [pid 5077] close(3) = 0 [pid 5077] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5077] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5077] memfd_create("syzkaller", 0) = 4 [pid 5077] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5077] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5077] munmap(0x7f3f2898f000, 262144) = 0 [pid 5077] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.809132][ T5075] loop0: detected capacity change from 0 to 512 [ 45.817747][ T5075] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.831661][ T5075] EXT4-fs (loop0): 1 truncate cleaned up [pid 5077] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5077] close(4) = 0 [pid 5077] mkdir("./file1", 0777) = 0 [pid 5077] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5077] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5077] chdir("./file1") = 0 [pid 5077] ioctl(5, LOOP_CLR_FD) = 0 [pid 5077] close(5) = 0 [pid 5077] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5077] creat("./file1", 000) = 5 [pid 5077] exit_group(0) = ? [pid 5077] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5077, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./38", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./38/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./38/binderfs") = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./38/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./38") = 0 mkdir("./39", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5079 ./strace-static-x86_64: Process 5079 attached [pid 5079] chdir("./39") = 0 [pid 5079] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5079] setpgid(0, 0) = 0 [pid 5079] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5079] write(3, "1000", 4) = 4 [pid 5079] close(3) = 0 [pid 5079] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5079] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5079] memfd_create("syzkaller", 0) = 4 [pid 5079] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5079] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5079] munmap(0x7f3f2898f000, 262144) = 0 [pid 5079] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.884451][ T5077] loop0: detected capacity change from 0 to 512 [ 45.893021][ T5077] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.907681][ T5077] EXT4-fs (loop0): 1 truncate cleaned up [pid 5079] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5079] close(4) = 0 [pid 5079] mkdir("./file1", 0777) = 0 [pid 5079] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5079] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5079] chdir("./file1") = 0 [pid 5079] ioctl(5, LOOP_CLR_FD) = 0 [pid 5079] close(5) = 0 [pid 5079] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5079] creat("./file1", 000) = 5 [pid 5079] exit_group(0) = ? [pid 5079] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5079, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./39", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./39/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./39/binderfs") = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./39/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./39") = 0 mkdir("./40", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5081 attached [pid 5081] chdir("./40") = 0 [pid 5081] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5081] setpgid(0, 0) = 0 [pid 5081] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5081] write(3, "1000", 4) = 4 [pid 5081] close(3) = 0 [pid 5081] symlink("/dev/binderfs", "./binderfs" [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5081 [pid 5081] <... symlink resumed>) = 0 [pid 5081] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5081] memfd_create("syzkaller", 0) = 4 [pid 5081] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5081] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5081] munmap(0x7f3f2898f000, 262144) = 0 [pid 5081] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 45.954393][ T5079] loop0: detected capacity change from 0 to 512 [ 45.962676][ T5079] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 45.976719][ T5079] EXT4-fs (loop0): 1 truncate cleaned up [pid 5081] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5081] close(4) = 0 [pid 5081] mkdir("./file1", 0777) = 0 [pid 5081] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5081] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5081] chdir("./file1") = 0 [pid 5081] ioctl(5, LOOP_CLR_FD) = 0 [pid 5081] close(5) = 0 [pid 5081] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5081] creat("./file1", 000) = 5 [pid 5081] exit_group(0) = ? [pid 5081] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5081, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./40", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./40/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./40/binderfs") = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./40/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./40") = 0 mkdir("./41", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5083 ./strace-static-x86_64: Process 5083 attached [pid 5083] chdir("./41") = 0 [pid 5083] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5083] setpgid(0, 0) = 0 [pid 5083] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5083] write(3, "1000", 4) = 4 [pid 5083] close(3) = 0 [pid 5083] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5083] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5083] memfd_create("syzkaller", 0) = 4 [pid 5083] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5083] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5083] munmap(0x7f3f2898f000, 262144) = 0 [pid 5083] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.022508][ T5081] loop0: detected capacity change from 0 to 512 [ 46.033068][ T5081] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.047025][ T5081] EXT4-fs (loop0): 1 truncate cleaned up [pid 5083] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5083] close(4) = 0 [pid 5083] mkdir("./file1", 0777) = 0 [pid 5083] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5083] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5083] chdir("./file1") = 0 [pid 5083] ioctl(5, LOOP_CLR_FD) = 0 [pid 5083] close(5) = 0 [pid 5083] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5083] creat("./file1", 000) = 5 [pid 5083] exit_group(0) = ? [pid 5083] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5083, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./41", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./41/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./41/binderfs") = 0 umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./41/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./41") = 0 mkdir("./42", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5085 ./strace-static-x86_64: Process 5085 attached [pid 5085] chdir("./42") = 0 [pid 5085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5085] setpgid(0, 0) = 0 [pid 5085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5085] write(3, "1000", 4) = 4 [pid 5085] close(3) = 0 [pid 5085] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5085] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5085] memfd_create("syzkaller", 0) = 4 [pid 5085] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5085] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5085] munmap(0x7f3f2898f000, 262144) = 0 [pid 5085] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.094756][ T5083] loop0: detected capacity change from 0 to 512 [ 46.103115][ T5083] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.117889][ T5083] EXT4-fs (loop0): 1 truncate cleaned up [pid 5085] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5085] close(4) = 0 [pid 5085] mkdir("./file1", 0777) = 0 [pid 5085] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5085] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5085] chdir("./file1") = 0 [pid 5085] ioctl(5, LOOP_CLR_FD) = 0 [pid 5085] close(5) = 0 [pid 5085] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5085] creat("./file1", 000) = 5 [pid 5085] exit_group(0) = ? [pid 5085] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5085, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./42", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./42/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./42/binderfs") = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./42/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./42") = 0 mkdir("./43", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5087 ./strace-static-x86_64: Process 5087 attached [pid 5087] chdir("./43") = 0 [pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5087] setpgid(0, 0) = 0 [pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5087] write(3, "1000", 4) = 4 [pid 5087] close(3) = 0 [pid 5087] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5087] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5087] memfd_create("syzkaller", 0) = 4 [pid 5087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5087] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5087] munmap(0x7f3f2898f000, 262144) = 0 [pid 5087] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.158058][ T5085] loop0: detected capacity change from 0 to 512 [ 46.166210][ T5085] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.179861][ T5085] EXT4-fs (loop0): 1 truncate cleaned up [pid 5087] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5087] close(4) = 0 [pid 5087] mkdir("./file1", 0777) = 0 [pid 5087] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5087] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5087] chdir("./file1") = 0 [pid 5087] ioctl(5, LOOP_CLR_FD) = 0 [pid 5087] close(5) = 0 [pid 5087] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5087] creat("./file1", 000) = 5 [pid 5087] exit_group(0) = ? [pid 5087] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5087, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./43/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./43/binderfs") = 0 umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./43/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./43") = 0 mkdir("./44", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5089 ./strace-static-x86_64: Process 5089 attached [pid 5089] chdir("./44") = 0 [pid 5089] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5089] setpgid(0, 0) = 0 [pid 5089] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5089] write(3, "1000", 4) = 4 [pid 5089] close(3) = 0 [pid 5089] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5089] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5089] memfd_create("syzkaller", 0) = 4 [pid 5089] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5089] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5089] munmap(0x7f3f2898f000, 262144) = 0 [pid 5089] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.218703][ T5087] loop0: detected capacity change from 0 to 512 [ 46.227556][ T5087] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.241953][ T5087] EXT4-fs (loop0): 1 truncate cleaned up [pid 5089] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5089] close(4) = 0 [pid 5089] mkdir("./file1", 0777) = 0 [pid 5089] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5089] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5089] chdir("./file1") = 0 [pid 5089] ioctl(5, LOOP_CLR_FD) = 0 [pid 5089] close(5) = 0 [pid 5089] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5089] creat("./file1", 000) = 5 [pid 5089] exit_group(0) = ? [pid 5089] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5089, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./44", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./44/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./44/binderfs") = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./44/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./44/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./44") = 0 mkdir("./45", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5091 attached [pid 5091] chdir("./45") = 0 [pid 5091] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5091] setpgid(0, 0) = 0 [pid 5091] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5091] write(3, "1000", 4) = 4 [pid 5091] close(3) = 0 [pid 5091] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5091] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5091] memfd_create("syzkaller", 0 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5091 [pid 5091] <... memfd_create resumed>) = 4 [pid 5091] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5091] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5091] munmap(0x7f3f2898f000, 262144) = 0 [pid 5091] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.284030][ T5089] loop0: detected capacity change from 0 to 512 [ 46.293008][ T5089] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.308164][ T5089] EXT4-fs (loop0): 1 truncate cleaned up [pid 5091] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5091] close(4) = 0 [pid 5091] mkdir("./file1", 0777) = 0 [pid 5091] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5091] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5091] chdir("./file1") = 0 [pid 5091] ioctl(5, LOOP_CLR_FD) = 0 [pid 5091] close(5) = 0 [pid 5091] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5091] creat("./file1", 000) = 5 [pid 5091] exit_group(0) = ? [pid 5091] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5091, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./45", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./45/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./45/binderfs") = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./45/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./45") = 0 mkdir("./46", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5093 ./strace-static-x86_64: Process 5093 attached [pid 5093] chdir("./46") = 0 [pid 5093] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5093] setpgid(0, 0) = 0 [pid 5093] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5093] write(3, "1000", 4) = 4 [pid 5093] close(3) = 0 [pid 5093] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5093] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5093] memfd_create("syzkaller", 0) = 4 [pid 5093] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5093] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5093] munmap(0x7f3f2898f000, 262144) = 0 [pid 5093] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.360920][ T5091] loop0: detected capacity change from 0 to 512 [ 46.369419][ T5091] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.383409][ T5091] EXT4-fs (loop0): 1 truncate cleaned up [pid 5093] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5093] close(4) = 0 [pid 5093] mkdir("./file1", 0777) = 0 [pid 5093] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5093] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5093] chdir("./file1") = 0 [pid 5093] ioctl(5, LOOP_CLR_FD) = 0 [pid 5093] close(5) = 0 [pid 5093] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5093] creat("./file1", 000) = 5 [pid 5093] exit_group(0) = ? [pid 5093] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5093, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./46", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./46/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./46/binderfs") = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./46/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./46/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./46") = 0 mkdir("./47", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5095 attached , child_tidptr=0x555556c935d0) = 5095 [pid 5095] chdir("./47") = 0 [pid 5095] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5095] setpgid(0, 0) = 0 [pid 5095] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5095] write(3, "1000", 4) = 4 [pid 5095] close(3) = 0 [pid 5095] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5095] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5095] memfd_create("syzkaller", 0) = 4 [pid 5095] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5095] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5095] munmap(0x7f3f2898f000, 262144) = 0 [ 46.427720][ T5093] loop0: detected capacity change from 0 to 512 [ 46.437461][ T5093] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.451863][ T5093] EXT4-fs (loop0): 1 truncate cleaned up [pid 5095] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5095] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5095] close(4) = 0 [pid 5095] mkdir("./file1", 0777) = 0 [pid 5095] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5095] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5095] chdir("./file1") = 0 [pid 5095] ioctl(5, LOOP_CLR_FD) = 0 [pid 5095] close(5) = 0 [pid 5095] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5095] creat("./file1", 000) = 5 [pid 5095] exit_group(0) = ? [pid 5095] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5095, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./47", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./47/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./47/binderfs") = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./47/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./47/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./47") = 0 mkdir("./48", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5098 ./strace-static-x86_64: Process 5098 attached [pid 5098] chdir("./48") = 0 [pid 5098] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5098] setpgid(0, 0) = 0 [pid 5098] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5098] write(3, "1000", 4) = 4 [pid 5098] close(3) = 0 [pid 5098] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5098] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5098] memfd_create("syzkaller", 0) = 4 [pid 5098] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5098] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5098] munmap(0x7f3f2898f000, 262144) = 0 [pid 5098] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.506839][ T5095] loop0: detected capacity change from 0 to 512 [ 46.515366][ T5095] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.529459][ T5095] EXT4-fs (loop0): 1 truncate cleaned up [pid 5098] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5098] close(4) = 0 [pid 5098] mkdir("./file1", 0777) = 0 [pid 5098] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5098] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5098] chdir("./file1") = 0 [pid 5098] ioctl(5, LOOP_CLR_FD) = 0 [pid 5098] close(5) = 0 [pid 5098] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5098] creat("./file1", 000) = 5 [pid 5098] exit_group(0) = ? [pid 5098] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5098, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./48", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./48/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./48/binderfs") = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./48/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./48") = 0 mkdir("./49", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5100 ./strace-static-x86_64: Process 5100 attached [pid 5100] chdir("./49") = 0 [pid 5100] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5100] setpgid(0, 0) = 0 [pid 5100] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5100] write(3, "1000", 4) = 4 [pid 5100] close(3) = 0 [pid 5100] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5100] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5100] memfd_create("syzkaller", 0) = 4 [pid 5100] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [ 46.580359][ T5098] loop0: detected capacity change from 0 to 512 [ 46.591254][ T5098] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.605992][ T5098] EXT4-fs (loop0): 1 truncate cleaned up [pid 5100] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5100] munmap(0x7f3f2898f000, 262144) = 0 [pid 5100] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5100] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5100] close(4) = 0 [pid 5100] mkdir("./file1", 0777) = 0 [pid 5100] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5100] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5100] chdir("./file1") = 0 [pid 5100] ioctl(5, LOOP_CLR_FD) = 0 [pid 5100] close(5) = 0 [pid 5100] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5100] creat("./file1", 000) = 5 [pid 5100] exit_group(0) = ? [pid 5100] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5100, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./49", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./49/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./49/binderfs") = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./49/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./49") = 0 mkdir("./50", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5102 ./strace-static-x86_64: Process 5102 attached [pid 5102] chdir("./50") = 0 [pid 5102] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5102] setpgid(0, 0) = 0 [pid 5102] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5102] write(3, "1000", 4) = 4 [pid 5102] close(3) = 0 [pid 5102] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5102] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5102] memfd_create("syzkaller", 0) = 4 [pid 5102] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5102] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5102] munmap(0x7f3f2898f000, 262144) = 0 [pid 5102] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.653158][ T5100] loop0: detected capacity change from 0 to 512 [ 46.662411][ T5100] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.677065][ T5100] EXT4-fs (loop0): 1 truncate cleaned up [pid 5102] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5102] close(4) = 0 [pid 5102] mkdir("./file1", 0777) = 0 [pid 5102] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5102] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5102] chdir("./file1") = 0 [pid 5102] ioctl(5, LOOP_CLR_FD) = 0 [pid 5102] close(5) = 0 [pid 5102] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5102] creat("./file1", 000) = 5 [pid 5102] exit_group(0) = ? [pid 5102] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5102, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./50", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./50/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./50/binderfs") = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./50/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./50/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./50") = 0 [ 46.729422][ T5102] loop0: detected capacity change from 0 to 512 [ 46.739261][ T5102] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.753918][ T5102] EXT4-fs (loop0): 1 truncate cleaned up mkdir("./51", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5104 attached , child_tidptr=0x555556c935d0) = 5104 [pid 5104] chdir("./51") = 0 [pid 5104] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5104] setpgid(0, 0) = 0 [pid 5104] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5104] write(3, "1000", 4) = 4 [pid 5104] close(3) = 0 [pid 5104] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5104] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5104] memfd_create("syzkaller", 0) = 4 [pid 5104] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5104] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5104] munmap(0x7f3f2898f000, 262144) = 0 [pid 5104] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5104] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5104] close(4) = 0 [pid 5104] mkdir("./file1", 0777) = 0 [pid 5104] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5104] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5104] chdir("./file1") = 0 [pid 5104] ioctl(5, LOOP_CLR_FD) = 0 [pid 5104] close(5) = 0 [pid 5104] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5104] creat("./file1", 000) = 5 [pid 5104] exit_group(0) = ? [pid 5104] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5104, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./51", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./51/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./51/binderfs") = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./51/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./51/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./51") = 0 mkdir("./52", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5106 ./strace-static-x86_64: Process 5106 attached [pid 5106] chdir("./52") = 0 [pid 5106] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5106] setpgid(0, 0) = 0 [pid 5106] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5106] write(3, "1000", 4) = 4 [pid 5106] close(3) = 0 [pid 5106] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5106] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5106] memfd_create("syzkaller", 0) = 4 [pid 5106] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5106] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5106] munmap(0x7f3f2898f000, 262144) = 0 [pid 5106] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.825043][ T5104] loop0: detected capacity change from 0 to 512 [ 46.833276][ T5104] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.847461][ T5104] EXT4-fs (loop0): 1 truncate cleaned up [pid 5106] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5106] close(4) = 0 [pid 5106] mkdir("./file1", 0777) = 0 [pid 5106] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5106] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5106] chdir("./file1") = 0 [pid 5106] ioctl(5, LOOP_CLR_FD) = 0 [pid 5106] close(5) = 0 [pid 5106] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5106] creat("./file1", 000) = 5 [pid 5106] exit_group(0) = ? [pid 5106] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5106, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./52/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./52/binderfs") = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./52/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./52/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./52") = 0 mkdir("./53", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5108 ./strace-static-x86_64: Process 5108 attached [pid 5108] chdir("./53") = 0 [pid 5108] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5108] setpgid(0, 0) = 0 [pid 5108] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5108] write(3, "1000", 4) = 4 [pid 5108] close(3) = 0 [pid 5108] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5108] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5108] memfd_create("syzkaller", 0) = 4 [pid 5108] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5108] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5108] munmap(0x7f3f2898f000, 262144) = 0 [pid 5108] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.900577][ T5106] loop0: detected capacity change from 0 to 512 [ 46.908878][ T5106] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.923647][ T5106] EXT4-fs (loop0): 1 truncate cleaned up [pid 5108] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5108] close(4) = 0 [pid 5108] mkdir("./file1", 0777) = 0 [pid 5108] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5108] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5108] chdir("./file1") = 0 [pid 5108] ioctl(5, LOOP_CLR_FD) = 0 [pid 5108] close(5) = 0 [pid 5108] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5108] creat("./file1", 000) = 5 [pid 5108] exit_group(0) = ? [pid 5108] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5108, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./53", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./53/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./53/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./53/binderfs") = 0 umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./53/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./53/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./53") = 0 mkdir("./54", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5110 attached , child_tidptr=0x555556c935d0) = 5110 [pid 5110] chdir("./54") = 0 [pid 5110] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5110] setpgid(0, 0) = 0 [pid 5110] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5110] write(3, "1000", 4) = 4 [pid 5110] close(3) = 0 [pid 5110] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5110] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5110] memfd_create("syzkaller", 0) = 4 [pid 5110] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5110] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5110] munmap(0x7f3f2898f000, 262144) = 0 [pid 5110] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 46.970952][ T5108] loop0: detected capacity change from 0 to 512 [ 46.980567][ T5108] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 46.994138][ T5108] EXT4-fs (loop0): 1 truncate cleaned up [pid 5110] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5110] close(4) = 0 [pid 5110] mkdir("./file1", 0777) = 0 [pid 5110] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5110] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5110] chdir("./file1") = 0 [pid 5110] ioctl(5, LOOP_CLR_FD) = 0 [pid 5110] close(5) = 0 [pid 5110] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5110] creat("./file1", 000) = 5 [pid 5110] exit_group(0) = ? [pid 5110] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5110, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./54", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./54/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./54/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./54/binderfs") = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./54/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./54/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./54") = 0 mkdir("./55", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5112 attached [pid 5112] chdir("./55") = 0 [pid 5112] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5112] setpgid(0, 0) = 0 [pid 5112] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5112] write(3, "1000", 4) = 4 [pid 5112] close(3) = 0 [pid 5112] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5112] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5112] memfd_create("syzkaller", 0) = 4 [pid 5112] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5112 [pid 5112] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5112] munmap(0x7f3f2898f000, 262144) = 0 [pid 5112] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 47.039732][ T5110] loop0: detected capacity change from 0 to 512 [ 47.048379][ T5110] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 47.062209][ T5110] EXT4-fs (loop0): 1 truncate cleaned up [pid 5112] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5112] close(4) = 0 [pid 5112] mkdir("./file1", 0777) = 0 [pid 5112] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5112] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5112] chdir("./file1") = 0 [pid 5112] ioctl(5, LOOP_CLR_FD) = 0 [pid 5112] close(5) = 0 [pid 5112] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5112] creat("./file1", 000) = 5 [pid 5112] exit_group(0) = ? [pid 5112] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5112, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./55/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./55/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./55/binderfs") = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./55/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./55/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./55") = 0 mkdir("./56", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5115 ./strace-static-x86_64: Process 5115 attached [pid 5115] chdir("./56") = 0 [pid 5115] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5115] setpgid(0, 0) = 0 [pid 5115] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5115] write(3, "1000", 4) = 4 [pid 5115] close(3) = 0 [pid 5115] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5115] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5115] memfd_create("syzkaller", 0) = 4 [pid 5115] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5115] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5115] munmap(0x7f3f2898f000, 262144) = 0 [pid 5115] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 47.118020][ T5112] loop0: detected capacity change from 0 to 512 [ 47.126714][ T5112] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 47.141205][ T5112] EXT4-fs (loop0): 1 truncate cleaned up [pid 5115] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5115] close(4) = 0 [pid 5115] mkdir("./file1", 0777) = 0 [pid 5115] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5115] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5115] chdir("./file1") = 0 [pid 5115] ioctl(5, LOOP_CLR_FD) = 0 [pid 5115] close(5) = 0 [pid 5115] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5115] creat("./file1", 000) = 5 [pid 5115] exit_group(0) = ? [pid 5115] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5115, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./56", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./56/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./56/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./56/binderfs") = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./56/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./56/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./56") = 0 mkdir("./57", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5117 attached , child_tidptr=0x555556c935d0) = 5117 [pid 5117] chdir("./57") = 0 [pid 5117] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5117] setpgid(0, 0) = 0 [pid 5117] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5117] write(3, "1000", 4) = 4 [pid 5117] close(3) = 0 [pid 5117] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5117] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5117] memfd_create("syzkaller", 0) = 4 [pid 5117] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5117] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5117] munmap(0x7f3f2898f000, 262144) = 0 [pid 5117] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 47.199628][ T5115] loop0: detected capacity change from 0 to 512 [ 47.208433][ T5115] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 47.222313][ T5115] EXT4-fs (loop0): 1 truncate cleaned up [pid 5117] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5117] close(4) = 0 [pid 5117] mkdir("./file1", 0777) = 0 [pid 5117] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5117] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5117] chdir("./file1") = 0 [pid 5117] ioctl(5, LOOP_CLR_FD) = 0 [pid 5117] close(5) = 0 [pid 5117] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5117] creat("./file1", 000) = 5 [pid 5117] exit_group(0) = ? [pid 5117] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5117, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./57", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./57/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./57/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./57/binderfs") = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./57/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./57/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./57") = 0 mkdir("./58", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5119 attached , child_tidptr=0x555556c935d0) = 5119 [pid 5119] chdir("./58") = 0 [pid 5119] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5119] setpgid(0, 0) = 0 [pid 5119] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5119] write(3, "1000", 4) = 4 [pid 5119] close(3) = 0 [pid 5119] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5119] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5119] memfd_create("syzkaller", 0) = 4 [pid 5119] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5119] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5119] munmap(0x7f3f2898f000, 262144) = 0 [pid 5119] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 47.278594][ T5117] loop0: detected capacity change from 0 to 512 [ 47.286658][ T5117] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 47.300641][ T5117] EXT4-fs (loop0): 1 truncate cleaned up [pid 5119] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5119] close(4) = 0 [pid 5119] mkdir("./file1", 0777) = 0 [pid 5119] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5119] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5119] chdir("./file1") = 0 [pid 5119] ioctl(5, LOOP_CLR_FD) = 0 [pid 5119] close(5) = 0 [pid 5119] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [ 47.357552][ T5119] loop0: detected capacity change from 0 to 512 [ 47.368101][ T5119] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 47.381881][ T5119] EXT4-fs (loop0): 1 truncate cleaned up [ 47.390516][ T5119] [ 47.392871][ T5119] ====================================================== [ 47.399878][ T5119] WARNING: possible circular locking dependency detected [ 47.406879][ T5119] 6.4.0-rc7-syzkaller-00072-gdad9774deaf1 #0 Not tainted [ 47.413874][ T5119] ------------------------------------------------------ [ 47.420867][ T5119] syz-executor162/5119 is trying to acquire lock: [ 47.427252][ T5119] ffff888073d04000 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x173/0x400 [ 47.437636][ T5119] [ 47.437636][ T5119] but task is already holding lock: [ 47.444991][ T5119] ffff888073d04888 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1988/0x2880 [ 47.454281][ T5119] [ 47.454281][ T5119] which lock already depends on the new lock. [ 47.454281][ T5119] [ 47.465727][ T5119] [ 47.465727][ T5119] the existing dependency chain (in reverse order) is: [ 47.474863][ T5119] [ 47.474863][ T5119] -> #1 (&ei->i_data_sem/3){++++}-{3:3}: [ 47.482685][ T5119] down_write+0x92/0x200 [ 47.487455][ T5119] ext4_xattr_set_entry+0x3046/0x3810 [ 47.493952][ T5119] ext4_xattr_ibody_set+0x131/0x3a0 [ 47.499960][ T5119] ext4_xattr_set_handle+0x968/0x1510 [ 47.506228][ T5119] ext4_xattr_set+0x144/0x360 [ 47.511973][ T5119] __vfs_setxattr+0x173/0x1e0 [ 47.517266][ T5119] __vfs_setxattr_noperm+0x129/0x5f0 [ 47.523068][ T5119] __vfs_setxattr_locked+0x1d3/0x260 [ 47.528860][ T5119] vfs_setxattr+0x143/0x340 [ 47.534129][ T5119] do_setxattr+0x147/0x190 [ 47.539153][ T5119] setxattr+0x146/0x160 [ 47.543807][ T5119] path_setxattr+0x197/0x1c0 [ 47.549011][ T5119] __x64_sys_setxattr+0xc4/0x160 [ 47.554455][ T5119] do_syscall_64+0x39/0xb0 [ 47.559829][ T5119] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 47.566263][ T5119] [ 47.566263][ T5119] -> #0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}: [ 47.574799][ T5119] __lock_acquire+0x2fcd/0x5f30 [ 47.580370][ T5119] lock_acquire+0x1b1/0x520 [ 47.585556][ T5119] down_write+0x92/0x200 [ 47.590395][ T5119] ext4_xattr_inode_iget+0x173/0x400 [ 47.596403][ T5119] ext4_xattr_inode_get+0x162/0x830 [ 47.602213][ T5119] ext4_expand_extra_isize_ea+0xf51/0x1810 [ 47.608532][ T5119] __ext4_expand_extra_isize+0x33e/0x470 [ 47.614669][ T5119] __ext4_mark_inode_dirty+0x51b/0x800 [ 47.620631][ T5119] ext4_setattr+0x1a02/0x2880 [ 47.626098][ T5119] notify_change+0xb2c/0x1180 [ 47.631295][ T5119] do_truncate+0x143/0x200 [ 47.636221][ T5119] path_openat+0x2083/0x2750 [ 47.641315][ T5119] do_filp_open+0x1ba/0x410 [ 47.646425][ T5119] do_sys_openat2+0x16d/0x4c0 [ 47.651630][ T5119] __x64_sys_creat+0xcd/0x120 [ 47.656835][ T5119] do_syscall_64+0x39/0xb0 [ 47.661755][ T5119] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 47.668155][ T5119] [ 47.668155][ T5119] other info that might help us debug this: [ 47.668155][ T5119] [ 47.679597][ T5119] Possible unsafe locking scenario: [ 47.679597][ T5119] [ 47.687030][ T5119] CPU0 CPU1 [ 47.692382][ T5119] ---- ---- [ 47.697817][ T5119] lock(&ei->i_data_sem/3); [ 47.702507][ T5119] lock(&ea_inode->i_rwsem#8/1); [ 47.710556][ T5119] lock(&ei->i_data_sem/3); [ 47.718025][ T5119] lock(&ea_inode->i_rwsem#8/1); [ 47.723040][ T5119] [ 47.723040][ T5119] *** DEADLOCK *** [ 47.723040][ T5119] [ 47.731171][ T5119] 5 locks held by syz-executor162/5119: [ 47.736925][ T5119] #0: ffff88807c0f4460 (sb_writers#4){.+.+}-{0:0}, at: path_openat+0x19a4/0x2750 [ 47.746148][ T5119] #1: ffff888073d04a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: do_truncate+0x131/0x200 [ 47.756393][ T5119] #2: ffff888073d04ba0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0x6f2/0x2880 [ 47.766844][ T5119] #3: ffff888073d04888 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1988/0x2880 [ 47.776851][ T5119] #4: ffff888073d046c8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x48f/0x800 [ 47.787180][ T5119] [ 47.787180][ T5119] stack backtrace: [ 47.793086][ T5119] CPU: 1 PID: 5119 Comm: syz-executor162 Not tainted 6.4.0-rc7-syzkaller-00072-gdad9774deaf1 #0 [ 47.803481][ T5119] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 47.813540][ T5119] Call Trace: [ 47.816842][ T5119] [ 47.819757][ T5119] dump_stack_lvl+0xd9/0x150 [ 47.824327][ T5119] check_noncircular+0x25f/0x2e0 [ 47.829251][ T5119] ? print_circular_bug+0x730/0x730 [ 47.834430][ T5119] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 47.840396][ T5119] __lock_acquire+0x2fcd/0x5f30 [ 47.845407][ T5119] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 47.851894][ T5119] ? do_raw_spin_unlock+0x175/0x230 [ 47.857080][ T5119] lock_acquire+0x1b1/0x520 [ 47.861568][ T5119] ? ext4_xattr_inode_iget+0x173/0x400 [ 47.867011][ T5119] ? lock_sync+0x190/0x190 [ 47.871404][ T5119] ? do_truncate+0x143/0x200 [ 47.875980][ T5119] down_write+0x92/0x200 [ 47.880416][ T5119] ? ext4_xattr_inode_iget+0x173/0x400 [ 47.885891][ T5119] ? rwsem_down_write_slowpath+0x1220/0x1220 [ 47.891860][ T5119] ? fs_reclaim_acquire+0xba/0x160 [ 47.897527][ T5119] ? ext4_xattr_inode_set_class+0x19b/0x240 [ 47.904743][ T5119] ext4_xattr_inode_iget+0x173/0x400 [ 47.910057][ T5119] ext4_xattr_inode_get+0x162/0x830 [ 47.915246][ T5119] ? ext4_xattr_inode_iget+0x400/0x400 [ 47.920792][ T5119] ? kvmalloc_node+0xa2/0x1a0 [ 47.925547][ T5119] ? rcu_is_watching+0x12/0xb0 [ 47.930300][ T5119] ? __kmalloc_node+0xfb/0x1a0 [ 47.935043][ T5119] ext4_expand_extra_isize_ea+0xf51/0x1810 [ 47.941105][ T5119] ? ext4_xattr_set+0x360/0x360 [ 47.946136][ T5119] ? dquot_initialize_needed+0x18c/0x290 [ 47.951829][ T5119] ? __ext4_mark_inode_dirty+0x48f/0x800 [ 47.957855][ T5119] __ext4_expand_extra_isize+0x33e/0x470 [ 47.963485][ T5119] __ext4_mark_inode_dirty+0x51b/0x800 [ 47.968939][ T5119] ? ext4_expand_extra_isize+0x5e0/0x5e0 [ 47.974582][ T5119] ? rwsem_down_write_slowpath+0x1220/0x1220 [ 47.980581][ T5119] ? __ext4_journal_start_sb+0x1fc/0x5d0 [ 47.986204][ T5119] ? ext4_setattr+0x86a/0x2880 [ 47.990967][ T5119] ext4_setattr+0x1a02/0x2880 [ 47.995661][ T5119] ? ext4_journalled_write_end+0xfb0/0xfb0 [ 48.001561][ T5119] notify_change+0xb2c/0x1180 [ 48.006339][ T5119] ? down_write+0x14f/0x200 [ 48.010848][ T5119] ? do_truncate+0x143/0x200 [ 48.015599][ T5119] do_truncate+0x143/0x200 [ 48.020024][ T5119] ? file_open_root+0x460/0x460 [ 48.024861][ T5119] ? common_perm_cond+0x22f/0x830 [ 48.029967][ T5119] ? ext4_file_write_iter+0x1740/0x1740 [ 48.035927][ T5119] path_openat+0x2083/0x2750 [ 48.040500][ T5119] ? path_lookupat+0x840/0x840 [ 48.045333][ T5119] do_filp_open+0x1ba/0x410 [ 48.049835][ T5119] ? may_open_dev+0xf0/0xf0 [ 48.054323][ T5119] ? find_held_lock+0x2d/0x110 [ 48.059067][ T5119] ? do_raw_spin_lock+0x124/0x2b0 [ 48.064073][ T5119] ? spin_bug+0x1c0/0x1c0 [ 48.068402][ T5119] ? _raw_spin_unlock+0x28/0x40 [ 48.073233][ T5119] ? alloc_fd+0x2e4/0x750 [ 48.077543][ T5119] do_sys_openat2+0x16d/0x4c0 [ 48.082471][ T5119] ? find_held_lock+0x2d/0x110 [ 48.087390][ T5119] ? build_open_flags+0x720/0x720 [ 48.092404][ T5119] ? ptrace_notify+0xfe/0x140 [ 48.097061][ T5119] ? lock_downgrade+0x690/0x690 [ 48.101911][ T5119] __x64_sys_creat+0xcd/0x120 [ 48.106595][ T5119] ? __x64_compat_sys_openat+0x1f0/0x1f0 [ 48.112234][ T5119] ? _raw_spin_unlock_irq+0x2e/0x50 [ 48.117434][ T5119] ? ptrace_notify+0xfe/0x140 [ 48.122120][ T5119] ? syscall_trace_enter.constprop.0+0xb0/0x1e0 [ 48.128368][ T5119] do_syscall_64+0x39/0xb0 [ 48.132770][ T5119] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 48.138657][ T5119] RIP: 0033:0x7f3f30ddca39 [ 48.143053][ T5119] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 48.162827][ T5119] RSP: 002b:00007ffe3ca2c098 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 48.171220][ T5119] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f3f30ddca39 [ 48.179192][ T5119] RDX: 00007f3f30ddca39 RSI: 0000000000000000 RDI: 0000000020000040 [ 48.187683][ T5119] RBP: 0000000000000000 R08: 00007ffe3ca2c0c0 R09: 00007ffe3ca2c0c0 [ 48.195661][ T5119] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3ca2c0bc [ 48.203788][ T5119] R13: 00007ffe3ca2c0f0 R14: 00007ffe3ca2c0d0 R15: 000000000000003a [pid 5119] creat("./file1", 000) = 5 [pid 5119] exit_group(0) = ? [pid 5119] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5119, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./58", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./58/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./58/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./58/binderfs") = 0 umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./58/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./58/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./58") = 0 mkdir("./59", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5121 ./strace-static-x86_64: Process 5121 attached [pid 5121] chdir("./59") = 0 [pid 5121] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5121] setpgid(0, 0) = 0 [pid 5121] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5121] write(3, "1000", 4) = 4 [pid 5121] close(3) = 0 [pid 5121] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5121] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5121] memfd_create("syzkaller", 0) = 4 [pid 5121] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5121] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5121] munmap(0x7f3f2898f000, 262144) = 0 [pid 5121] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.211744][ T5119] [pid 5121] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5121] close(4) = 0 [pid 5121] mkdir("./file1", 0777) = 0 [pid 5121] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5121] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5121] chdir("./file1") = 0 [pid 5121] ioctl(5, LOOP_CLR_FD) = 0 [pid 5121] close(5) = 0 [pid 5121] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5121] creat("./file1", 000) = 5 [pid 5121] exit_group(0) = ? [pid 5121] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5121, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./59", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./59/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./59/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./59/binderfs") = 0 umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./59/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./59/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./59") = 0 mkdir("./60", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5123 attached , child_tidptr=0x555556c935d0) = 5123 [pid 5123] chdir("./60") = 0 [pid 5123] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5123] setpgid(0, 0) = 0 [pid 5123] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5123] write(3, "1000", 4) = 4 [pid 5123] close(3) = 0 [pid 5123] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5123] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5123] memfd_create("syzkaller", 0) = 4 [pid 5123] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5123] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5123] munmap(0x7f3f2898f000, 262144) = 0 [pid 5123] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.234355][ T5121] loop0: detected capacity change from 0 to 512 [ 48.242841][ T5121] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.256296][ T5121] EXT4-fs (loop0): 1 truncate cleaned up [pid 5123] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5123] close(4) = 0 [pid 5123] mkdir("./file1", 0777) = 0 [pid 5123] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5123] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5123] chdir("./file1") = 0 [pid 5123] ioctl(5, LOOP_CLR_FD) = 0 [pid 5123] close(5) = 0 [pid 5123] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5123] creat("./file1", 000) = 5 [pid 5123] exit_group(0) = ? [pid 5123] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5123, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./60", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./60", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./60/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./60/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./60/binderfs") = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./60/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./60/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./60/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./60") = 0 mkdir("./61", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5125 ./strace-static-x86_64: Process 5125 attached [pid 5125] chdir("./61") = 0 [pid 5125] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5125] setpgid(0, 0) = 0 [pid 5125] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5125] write(3, "1000", 4) = 4 [pid 5125] close(3) = 0 [pid 5125] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5125] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5125] memfd_create("syzkaller", 0) = 4 [pid 5125] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5125] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5125] munmap(0x7f3f2898f000, 262144) = 0 [pid 5125] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.293476][ T5123] loop0: detected capacity change from 0 to 512 [ 48.301376][ T5123] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.314693][ T5123] EXT4-fs (loop0): 1 truncate cleaned up [pid 5125] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5125] close(4) = 0 [pid 5125] mkdir("./file1", 0777) = 0 [pid 5125] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5125] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5125] chdir("./file1") = 0 [pid 5125] ioctl(5, LOOP_CLR_FD) = 0 [pid 5125] close(5) = 0 [pid 5125] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5125] creat("./file1", 000) = 5 [pid 5125] exit_group(0) = ? [pid 5125] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5125, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./61", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./61", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./61/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./61/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./61/binderfs") = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./61/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./61/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./61/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./61") = 0 mkdir("./62", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5127 ./strace-static-x86_64: Process 5127 attached [pid 5127] chdir("./62") = 0 [pid 5127] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5127] setpgid(0, 0) = 0 [pid 5127] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5127] write(3, "1000", 4) = 4 [pid 5127] close(3) = 0 [pid 5127] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5127] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5127] memfd_create("syzkaller", 0) = 4 [pid 5127] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5127] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5127] munmap(0x7f3f2898f000, 262144) = 0 [pid 5127] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.347282][ T5125] loop0: detected capacity change from 0 to 512 [ 48.355676][ T5125] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.368933][ T5125] EXT4-fs (loop0): 1 truncate cleaned up [pid 5127] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5127] close(4) = 0 [pid 5127] mkdir("./file1", 0777) = 0 [pid 5127] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5127] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5127] chdir("./file1") = 0 [pid 5127] ioctl(5, LOOP_CLR_FD) = 0 [pid 5127] close(5) = 0 [pid 5127] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5127] creat("./file1", 000) = 5 [pid 5127] exit_group(0) = ? [pid 5127] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5127, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./62", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./62/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./62/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./62/binderfs") = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./62/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./62/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./62") = 0 mkdir("./63", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5129 ./strace-static-x86_64: Process 5129 attached [pid 5129] chdir("./63") = 0 [pid 5129] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5129] setpgid(0, 0) = 0 [pid 5129] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5129] write(3, "1000", 4) = 4 [pid 5129] close(3) = 0 [pid 5129] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5129] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5129] memfd_create("syzkaller", 0) = 4 [pid 5129] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5129] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5129] munmap(0x7f3f2898f000, 262144) = 0 [pid 5129] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.408306][ T5127] loop0: detected capacity change from 0 to 512 [ 48.416129][ T5127] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.429299][ T5127] EXT4-fs (loop0): 1 truncate cleaned up [pid 5129] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5129] close(4) = 0 [pid 5129] mkdir("./file1", 0777) = 0 [pid 5129] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5129] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5129] chdir("./file1") = 0 [pid 5129] ioctl(5, LOOP_CLR_FD) = 0 [pid 5129] close(5) = 0 [pid 5129] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5129] creat("./file1", 000) = 5 [pid 5129] exit_group(0) = ? [pid 5129] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5129, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./63", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./63/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./63/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./63/binderfs") = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./63/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./63/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./63") = 0 mkdir("./64", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5131 ./strace-static-x86_64: Process 5131 attached [pid 5131] chdir("./64") = 0 [pid 5131] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5131] setpgid(0, 0) = 0 [pid 5131] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5131] write(3, "1000", 4) = 4 [pid 5131] close(3) = 0 [pid 5131] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5131] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5131] memfd_create("syzkaller", 0) = 4 [pid 5131] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5131] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5131] munmap(0x7f3f2898f000, 262144) = 0 [pid 5131] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.459713][ T5129] loop0: detected capacity change from 0 to 512 [ 48.467833][ T5129] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.481047][ T5129] EXT4-fs (loop0): 1 truncate cleaned up [pid 5131] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5131] close(4) = 0 [pid 5131] mkdir("./file1", 0777) = 0 [pid 5131] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5131] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5131] chdir("./file1") = 0 [pid 5131] ioctl(5, LOOP_CLR_FD) = 0 [pid 5131] close(5) = 0 [pid 5131] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5131] creat("./file1", 000) = 5 [pid 5131] exit_group(0) = ? [pid 5131] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5131, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./64", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./64/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./64/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./64/binderfs") = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./64/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./64/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./64") = 0 mkdir("./65", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5133 ./strace-static-x86_64: Process 5133 attached [pid 5133] chdir("./65") = 0 [pid 5133] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5133] setpgid(0, 0) = 0 [pid 5133] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5133] write(3, "1000", 4) = 4 [pid 5133] close(3) = 0 [pid 5133] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5133] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5133] memfd_create("syzkaller", 0) = 4 [pid 5133] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5133] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5133] munmap(0x7f3f2898f000, 262144) = 0 [pid 5133] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.521106][ T5131] loop0: detected capacity change from 0 to 512 [ 48.529423][ T5131] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.542648][ T5131] EXT4-fs (loop0): 1 truncate cleaned up [pid 5133] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5133] close(4) = 0 [pid 5133] mkdir("./file1", 0777) = 0 [pid 5133] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5133] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5133] chdir("./file1") = 0 [pid 5133] ioctl(5, LOOP_CLR_FD) = 0 [pid 5133] close(5) = 0 [pid 5133] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5133] creat("./file1", 000) = 5 [pid 5133] exit_group(0) = ? [pid 5133] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5133, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./65", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./65/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./65/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./65/binderfs") = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./65/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./65/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./65") = 0 mkdir("./66", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5135 ./strace-static-x86_64: Process 5135 attached [pid 5135] chdir("./66") = 0 [pid 5135] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5135] setpgid(0, 0) = 0 [pid 5135] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5135] write(3, "1000", 4) = 4 [pid 5135] close(3) = 0 [pid 5135] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5135] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5135] memfd_create("syzkaller", 0) = 4 [pid 5135] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5135] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5135] munmap(0x7f3f2898f000, 262144) = 0 [pid 5135] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.589829][ T5133] loop0: detected capacity change from 0 to 512 [ 48.597769][ T5133] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.611367][ T5133] EXT4-fs (loop0): 1 truncate cleaned up [pid 5135] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5135] close(4) = 0 [pid 5135] mkdir("./file1", 0777) = 0 [pid 5135] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5135] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5135] chdir("./file1") = 0 [pid 5135] ioctl(5, LOOP_CLR_FD) = 0 [pid 5135] close(5) = 0 [pid 5135] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5135] creat("./file1", 000) = 5 [pid 5135] exit_group(0) = ? [pid 5135] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5135, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./66", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./66/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./66/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./66/binderfs") = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./66/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./66/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./66") = 0 mkdir("./67", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5137 ./strace-static-x86_64: Process 5137 attached [pid 5137] chdir("./67") = 0 [pid 5137] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5137] setpgid(0, 0) = 0 [pid 5137] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5137] write(3, "1000", 4) = 4 [pid 5137] close(3) = 0 [pid 5137] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5137] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5137] memfd_create("syzkaller", 0) = 4 [pid 5137] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5137] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5137] munmap(0x7f3f2898f000, 262144) = 0 [pid 5137] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.644089][ T5135] loop0: detected capacity change from 0 to 512 [ 48.662193][ T5135] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.675916][ T5135] EXT4-fs (loop0): 1 truncate cleaned up [pid 5137] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5137] close(4) = 0 [pid 5137] mkdir("./file1", 0777) = 0 [pid 5137] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5137] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5137] chdir("./file1") = 0 [pid 5137] ioctl(5, LOOP_CLR_FD) = 0 [pid 5137] close(5) = 0 [pid 5137] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5137] creat("./file1", 000) = 5 [pid 5137] exit_group(0) = ? [pid 5137] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5137, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./67", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./67/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./67/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./67/binderfs") = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./67/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./67/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./67") = 0 mkdir("./68", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5139 ./strace-static-x86_64: Process 5139 attached [pid 5139] chdir("./68") = 0 [pid 5139] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5139] setpgid(0, 0) = 0 [pid 5139] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5139] write(3, "1000", 4) = 4 [pid 5139] close(3) = 0 [pid 5139] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5139] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5139] memfd_create("syzkaller", 0) = 4 [pid 5139] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5139] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5139] munmap(0x7f3f2898f000, 262144) = 0 [pid 5139] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.712682][ T5137] loop0: detected capacity change from 0 to 512 [ 48.720407][ T5137] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.734158][ T5137] EXT4-fs (loop0): 1 truncate cleaned up [pid 5139] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5139] close(4) = 0 [pid 5139] mkdir("./file1", 0777) = 0 [pid 5139] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5139] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5139] chdir("./file1") = 0 [pid 5139] ioctl(5, LOOP_CLR_FD) = 0 [pid 5139] close(5) = 0 [pid 5139] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5139] creat("./file1", 000) = 5 [pid 5139] exit_group(0) = ? [pid 5139] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5139, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./68", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./68/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./68/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./68/binderfs") = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./68/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./68/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./68") = 0 mkdir("./69", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5141 ./strace-static-x86_64: Process 5141 attached [pid 5141] chdir("./69") = 0 [pid 5141] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5141] setpgid(0, 0) = 0 [pid 5141] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [ 48.770544][ T5139] loop0: detected capacity change from 0 to 512 [ 48.778674][ T5139] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.792635][ T5139] EXT4-fs (loop0): 1 truncate cleaned up [pid 5141] write(3, "1000", 4) = 4 [pid 5141] close(3) = 0 [pid 5141] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5141] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5141] memfd_create("syzkaller", 0) = 4 [pid 5141] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5141] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5141] munmap(0x7f3f2898f000, 262144) = 0 [pid 5141] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5141] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5141] close(4) = 0 [pid 5141] mkdir("./file1", 0777) = 0 [pid 5141] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5141] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5141] chdir("./file1") = 0 [pid 5141] ioctl(5, LOOP_CLR_FD) = 0 [pid 5141] close(5) = 0 [pid 5141] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5141] creat("./file1", 000) = 5 [pid 5141] exit_group(0) = ? [pid 5141] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5141, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./69", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./69/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./69/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./69/binderfs") = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./69/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./69/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./69") = 0 mkdir("./70", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5143 ./strace-static-x86_64: Process 5143 attached [pid 5143] chdir("./70") = 0 [pid 5143] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5143] setpgid(0, 0) = 0 [pid 5143] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5143] write(3, "1000", 4) = 4 [pid 5143] close(3) = 0 [pid 5143] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5143] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5143] memfd_create("syzkaller", 0) = 4 [pid 5143] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5143] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5143] munmap(0x7f3f2898f000, 262144) = 0 [pid 5143] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.857245][ T5141] loop0: detected capacity change from 0 to 512 [ 48.865137][ T5141] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.878693][ T5141] EXT4-fs (loop0): 1 truncate cleaned up [pid 5143] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5143] close(4) = 0 [pid 5143] mkdir("./file1", 0777) = 0 [pid 5143] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5143] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5143] chdir("./file1") = 0 [pid 5143] ioctl(5, LOOP_CLR_FD) = 0 [pid 5143] close(5) = 0 [pid 5143] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5143] creat("./file1", 000) = 5 [pid 5143] exit_group(0) = ? [pid 5143] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5143, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./70", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./70", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./70/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./70/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./70/binderfs") = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./70/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./70/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./70/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./70") = 0 mkdir("./71", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5145 attached , child_tidptr=0x555556c935d0) = 5145 [pid 5145] chdir("./71") = 0 [pid 5145] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5145] setpgid(0, 0) = 0 [pid 5145] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5145] write(3, "1000", 4) = 4 [pid 5145] close(3) = 0 [pid 5145] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5145] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5145] memfd_create("syzkaller", 0) = 4 [pid 5145] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5145] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5145] munmap(0x7f3f2898f000, 262144) = 0 [pid 5145] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.909044][ T5143] loop0: detected capacity change from 0 to 512 [ 48.916929][ T5143] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.930289][ T5143] EXT4-fs (loop0): 1 truncate cleaned up [pid 5145] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5145] close(4) = 0 [pid 5145] mkdir("./file1", 0777) = 0 [pid 5145] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5145] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5145] chdir("./file1") = 0 [pid 5145] ioctl(5, LOOP_CLR_FD) = 0 [pid 5145] close(5) = 0 [pid 5145] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5145] creat("./file1", 000) = 5 [pid 5145] exit_group(0) = ? [pid 5145] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5145, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./71", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./71/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./71/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./71/binderfs") = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./71/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./71/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./71") = 0 mkdir("./72", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5147 ./strace-static-x86_64: Process 5147 attached [pid 5147] chdir("./72") = 0 [pid 5147] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5147] setpgid(0, 0) = 0 [pid 5147] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5147] write(3, "1000", 4) = 4 [pid 5147] close(3) = 0 [pid 5147] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5147] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5147] memfd_create("syzkaller", 0) = 4 [pid 5147] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5147] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5147] munmap(0x7f3f2898f000, 262144) = 0 [pid 5147] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 48.967068][ T5145] loop0: detected capacity change from 0 to 512 [ 48.974960][ T5145] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 48.988499][ T5145] EXT4-fs (loop0): 1 truncate cleaned up [pid 5147] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5147] close(4) = 0 [pid 5147] mkdir("./file1", 0777) = 0 [pid 5147] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5147] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5147] chdir("./file1") = 0 [pid 5147] ioctl(5, LOOP_CLR_FD) = 0 [pid 5147] close(5) = 0 [pid 5147] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5147] creat("./file1", 000) = 5 [pid 5147] exit_group(0) = ? [pid 5147] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5147, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./72", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./72", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./72/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./72/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./72/binderfs") = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./72/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./72/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./72/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./72") = 0 mkdir("./73", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5149 ./strace-static-x86_64: Process 5149 attached [pid 5149] chdir("./73") = 0 [pid 5149] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5149] setpgid(0, 0) = 0 [pid 5149] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5149] write(3, "1000", 4) = 4 [pid 5149] close(3) = 0 [pid 5149] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5149] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5149] memfd_create("syzkaller", 0) = 4 [pid 5149] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5149] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5149] munmap(0x7f3f2898f000, 262144) = 0 [pid 5149] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.027892][ T5147] loop0: detected capacity change from 0 to 512 [ 49.035941][ T5147] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.049553][ T5147] EXT4-fs (loop0): 1 truncate cleaned up [pid 5149] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5149] close(4) = 0 [pid 5149] mkdir("./file1", 0777) = 0 [pid 5149] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5149] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5149] chdir("./file1") = 0 [pid 5149] ioctl(5, LOOP_CLR_FD) = 0 [pid 5149] close(5) = 0 [pid 5149] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5149] creat("./file1", 000) = 5 [pid 5149] exit_group(0) = ? [pid 5149] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5149, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./73/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./73/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./73/binderfs") = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./73/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./73/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./73") = 0 mkdir("./74", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5151 ./strace-static-x86_64: Process 5151 attached [pid 5151] chdir("./74") = 0 [pid 5151] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5151] setpgid(0, 0) = 0 [pid 5151] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5151] write(3, "1000", 4) = 4 [pid 5151] close(3) = 0 [pid 5151] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5151] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5151] memfd_create("syzkaller", 0) = 4 [pid 5151] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5151] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5151] munmap(0x7f3f2898f000, 262144) = 0 [pid 5151] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.088186][ T5149] loop0: detected capacity change from 0 to 512 [ 49.095880][ T5149] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.109106][ T5149] EXT4-fs (loop0): 1 truncate cleaned up [pid 5151] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5151] close(4) = 0 [pid 5151] mkdir("./file1", 0777) = 0 [pid 5151] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5151] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5151] chdir("./file1") = 0 [pid 5151] ioctl(5, LOOP_CLR_FD) = 0 [pid 5151] close(5) = 0 [pid 5151] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5151] creat("./file1", 000) = 5 [pid 5151] exit_group(0) = ? [pid 5151] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5151, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./74", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./74/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./74/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./74/binderfs") = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./74/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./74/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./74") = 0 mkdir("./75", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5153 ./strace-static-x86_64: Process 5153 attached [pid 5153] chdir("./75") = 0 [pid 5153] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5153] setpgid(0, 0) = 0 [pid 5153] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5153] write(3, "1000", 4) = 4 [pid 5153] close(3) = 0 [pid 5153] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5153] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5153] memfd_create("syzkaller", 0) = 4 [pid 5153] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5153] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5153] munmap(0x7f3f2898f000, 262144) = 0 [pid 5153] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.136003][ T5151] loop0: detected capacity change from 0 to 512 [ 49.143732][ T5151] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.157388][ T5151] EXT4-fs (loop0): 1 truncate cleaned up [pid 5153] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5153] close(4) = 0 [pid 5153] mkdir("./file1", 0777) = 0 [pid 5153] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5153] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5153] chdir("./file1") = 0 [pid 5153] ioctl(5, LOOP_CLR_FD) = 0 [pid 5153] close(5) = 0 [pid 5153] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5153] creat("./file1", 000) = 5 [pid 5153] exit_group(0) = ? [pid 5153] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5153, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./75", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./75", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./75/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./75/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./75/binderfs") = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./75/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./75/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./75/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./75") = 0 mkdir("./76", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5155 ./strace-static-x86_64: Process 5155 attached [pid 5155] chdir("./76") = 0 [pid 5155] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5155] setpgid(0, 0) = 0 [pid 5155] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5155] write(3, "1000", 4) = 4 [pid 5155] close(3) = 0 [pid 5155] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5155] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5155] memfd_create("syzkaller", 0) = 4 [pid 5155] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5155] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5155] munmap(0x7f3f2898f000, 262144) = 0 [pid 5155] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.191038][ T5153] loop0: detected capacity change from 0 to 512 [ 49.198963][ T5153] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.212169][ T5153] EXT4-fs (loop0): 1 truncate cleaned up [pid 5155] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5155] close(4) = 0 [pid 5155] mkdir("./file1", 0777) = 0 [pid 5155] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5155] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5155] chdir("./file1") = 0 [pid 5155] ioctl(5, LOOP_CLR_FD) = 0 [pid 5155] close(5) = 0 [pid 5155] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5155] creat("./file1", 000) = 5 [pid 5155] exit_group(0) = ? [pid 5155] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5155, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./76", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./76", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./76/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./76/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./76/binderfs") = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./76/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./76/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./76/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./76") = 0 mkdir("./77", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5157 ./strace-static-x86_64: Process 5157 attached [pid 5157] chdir("./77") = 0 [pid 5157] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5157] setpgid(0, 0) = 0 [pid 5157] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5157] write(3, "1000", 4) = 4 [pid 5157] close(3) = 0 [pid 5157] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5157] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5157] memfd_create("syzkaller", 0) = 4 [pid 5157] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5157] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5157] munmap(0x7f3f2898f000, 262144) = 0 [pid 5157] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.251271][ T5155] loop0: detected capacity change from 0 to 512 [ 49.259373][ T5155] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.273175][ T5155] EXT4-fs (loop0): 1 truncate cleaned up [pid 5157] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5157] close(4) = 0 [pid 5157] mkdir("./file1", 0777) = 0 [pid 5157] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5157] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5157] chdir("./file1") = 0 [pid 5157] ioctl(5, LOOP_CLR_FD) = 0 [pid 5157] close(5) = 0 [pid 5157] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5157] creat("./file1", 000) = 5 [pid 5157] exit_group(0) = ? [pid 5157] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5157, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./77", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./77", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./77/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./77/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./77/binderfs") = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./77/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./77/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./77/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./77") = 0 mkdir("./78", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5159 ./strace-static-x86_64: Process 5159 attached [pid 5159] chdir("./78") = 0 [pid 5159] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5159] setpgid(0, 0) = 0 [pid 5159] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5159] write(3, "1000", 4) = 4 [pid 5159] close(3) = 0 [pid 5159] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5159] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5159] memfd_create("syzkaller", 0) = 4 [pid 5159] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5159] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5159] munmap(0x7f3f2898f000, 262144) = 0 [pid 5159] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.300231][ T5157] loop0: detected capacity change from 0 to 512 [ 49.308349][ T5157] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.321296][ T5157] EXT4-fs (loop0): 1 truncate cleaned up [pid 5159] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5159] close(4) = 0 [pid 5159] mkdir("./file1", 0777) = 0 [pid 5159] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5159] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5159] chdir("./file1") = 0 [pid 5159] ioctl(5, LOOP_CLR_FD) = 0 [pid 5159] close(5) = 0 [pid 5159] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5159] creat("./file1", 000) = 5 [pid 5159] exit_group(0) = ? [pid 5159] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5159, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./78", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./78", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./78/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./78/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./78/binderfs") = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./78/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./78/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./78/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./78") = 0 mkdir("./79", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5161 ./strace-static-x86_64: Process 5161 attached [pid 5161] chdir("./79") = 0 [pid 5161] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5161] setpgid(0, 0) = 0 [pid 5161] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5161] write(3, "1000", 4) = 4 [pid 5161] close(3) = 0 [pid 5161] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5161] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5161] memfd_create("syzkaller", 0) = 4 [pid 5161] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5161] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5161] munmap(0x7f3f2898f000, 262144) = 0 [pid 5161] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.351554][ T5159] loop0: detected capacity change from 0 to 512 [ 49.359998][ T5159] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.373358][ T5159] EXT4-fs (loop0): 1 truncate cleaned up [pid 5161] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5161] close(4) = 0 [pid 5161] mkdir("./file1", 0777) = 0 [pid 5161] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5161] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5161] chdir("./file1") = 0 [pid 5161] ioctl(5, LOOP_CLR_FD) = 0 [pid 5161] close(5) = 0 [pid 5161] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5161] creat("./file1", 000) = 5 [pid 5161] exit_group(0) = ? [pid 5161] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5161, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./79", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./79/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./79/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./79/binderfs") = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./79/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./79/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./79") = 0 mkdir("./80", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5163 ./strace-static-x86_64: Process 5163 attached [pid 5163] chdir("./80") = 0 [pid 5163] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5163] setpgid(0, 0) = 0 [pid 5163] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5163] write(3, "1000", 4) = 4 [pid 5163] close(3) = 0 [pid 5163] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5163] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5163] memfd_create("syzkaller", 0) = 4 [pid 5163] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5163] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5163] munmap(0x7f3f2898f000, 262144) = 0 [pid 5163] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.407426][ T5161] loop0: detected capacity change from 0 to 512 [ 49.415402][ T5161] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.429078][ T5161] EXT4-fs (loop0): 1 truncate cleaned up [pid 5163] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5163] close(4) = 0 [pid 5163] mkdir("./file1", 0777) = 0 [pid 5163] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5163] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5163] chdir("./file1") = 0 [pid 5163] ioctl(5, LOOP_CLR_FD) = 0 [pid 5163] close(5) = 0 [pid 5163] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5163] creat("./file1", 000) = 5 [pid 5163] exit_group(0) = ? [pid 5163] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5163, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./80", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./80/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./80/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./80/binderfs") = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./80/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./80/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./80") = 0 mkdir("./81", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5165 ./strace-static-x86_64: Process 5165 attached [pid 5165] chdir("./81") = 0 [pid 5165] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5165] setpgid(0, 0) = 0 [pid 5165] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5165] write(3, "1000", 4) = 4 [pid 5165] close(3) = 0 [pid 5165] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5165] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5165] memfd_create("syzkaller", 0) = 4 [pid 5165] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5165] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5165] munmap(0x7f3f2898f000, 262144) = 0 [pid 5165] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.471738][ T5163] loop0: detected capacity change from 0 to 512 [ 49.479934][ T5163] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.493360][ T5163] EXT4-fs (loop0): 1 truncate cleaned up [pid 5165] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5165] close(4) = 0 [pid 5165] mkdir("./file1", 0777) = 0 [pid 5165] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5165] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5165] chdir("./file1") = 0 [pid 5165] ioctl(5, LOOP_CLR_FD) = 0 [pid 5165] close(5) = 0 [pid 5165] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5165] creat("./file1", 000) = 5 [pid 5165] exit_group(0) = ? [pid 5165] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5165, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./81", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./81/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./81/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./81/binderfs") = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./81/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./81/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./81") = 0 mkdir("./82", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5167 ./strace-static-x86_64: Process 5167 attached [pid 5167] chdir("./82") = 0 [pid 5167] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5167] setpgid(0, 0) = 0 [pid 5167] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5167] write(3, "1000", 4) = 4 [pid 5167] close(3) = 0 [pid 5167] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5167] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5167] memfd_create("syzkaller", 0) = 4 [pid 5167] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5167] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5167] munmap(0x7f3f2898f000, 262144) = 0 [pid 5167] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.524531][ T5165] loop0: detected capacity change from 0 to 512 [ 49.532396][ T5165] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.545877][ T5165] EXT4-fs (loop0): 1 truncate cleaned up [pid 5167] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5167] close(4) = 0 [pid 5167] mkdir("./file1", 0777) = 0 [pid 5167] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5167] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5167] chdir("./file1") = 0 [pid 5167] ioctl(5, LOOP_CLR_FD) = 0 [pid 5167] close(5) = 0 [pid 5167] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5167] creat("./file1", 000) = 5 [pid 5167] exit_group(0) = ? [pid 5167] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5167, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./82", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./82/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./82/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./82/binderfs") = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./82/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./82/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./82") = 0 mkdir("./83", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5169 attached , child_tidptr=0x555556c935d0) = 5169 [pid 5169] chdir("./83") = 0 [pid 5169] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5169] setpgid(0, 0) = 0 [pid 5169] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5169] write(3, "1000", 4) = 4 [pid 5169] close(3) = 0 [pid 5169] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5169] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5169] memfd_create("syzkaller", 0) = 4 [pid 5169] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5169] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5169] munmap(0x7f3f2898f000, 262144) = 0 [pid 5169] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.583550][ T5167] loop0: detected capacity change from 0 to 512 [ 49.591486][ T5167] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.604822][ T5167] EXT4-fs (loop0): 1 truncate cleaned up [pid 5169] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5169] close(4) = 0 [pid 5169] mkdir("./file1", 0777) = 0 [pid 5169] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5169] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5169] chdir("./file1") = 0 [pid 5169] ioctl(5, LOOP_CLR_FD) = 0 [pid 5169] close(5) = 0 [pid 5169] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5169] creat("./file1", 000) = 5 [pid 5169] exit_group(0) = ? [pid 5169] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5169, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./83", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./83/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./83/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./83/binderfs") = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./83/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./83/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./83") = 0 mkdir("./84", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5171 ./strace-static-x86_64: Process 5171 attached [pid 5171] chdir("./84") = 0 [pid 5171] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5171] setpgid(0, 0) = 0 [pid 5171] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5171] write(3, "1000", 4) = 4 [pid 5171] close(3) = 0 [pid 5171] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5171] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5171] memfd_create("syzkaller", 0) = 4 [pid 5171] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5171] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5171] munmap(0x7f3f2898f000, 262144) = 0 [pid 5171] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.643967][ T5169] loop0: detected capacity change from 0 to 512 [ 49.652060][ T5169] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.665728][ T5169] EXT4-fs (loop0): 1 truncate cleaned up [pid 5171] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5171] close(4) = 0 [pid 5171] mkdir("./file1", 0777) = 0 [pid 5171] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5171] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5171] chdir("./file1") = 0 [pid 5171] ioctl(5, LOOP_CLR_FD) = 0 [pid 5171] close(5) = 0 [pid 5171] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5171] creat("./file1", 000) = 5 [pid 5171] exit_group(0) = ? [pid 5171] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5171, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./84", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./84/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./84/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./84/binderfs") = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./84/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./84/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./84") = 0 mkdir("./85", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5173 ./strace-static-x86_64: Process 5173 attached [pid 5173] chdir("./85") = 0 [pid 5173] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5173] setpgid(0, 0) = 0 [pid 5173] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5173] write(3, "1000", 4) = 4 [pid 5173] close(3) = 0 [pid 5173] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5173] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5173] memfd_create("syzkaller", 0) = 4 [pid 5173] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5173] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5173] munmap(0x7f3f2898f000, 262144) = 0 [pid 5173] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.701679][ T5171] loop0: detected capacity change from 0 to 512 [ 49.709385][ T5171] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.722516][ T5171] EXT4-fs (loop0): 1 truncate cleaned up [pid 5173] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5173] close(4) = 0 [pid 5173] mkdir("./file1", 0777) = 0 [pid 5173] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5173] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5173] chdir("./file1") = 0 [pid 5173] ioctl(5, LOOP_CLR_FD) = 0 [pid 5173] close(5) = 0 [pid 5173] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5173] creat("./file1", 000) = 5 [pid 5173] exit_group(0) = ? [pid 5173] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5173, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./85", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./85/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./85/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./85/binderfs") = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./85/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./85/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./85") = 0 mkdir("./86", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5175 ./strace-static-x86_64: Process 5175 attached [pid 5175] chdir("./86") = 0 [pid 5175] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5175] setpgid(0, 0) = 0 [pid 5175] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5175] write(3, "1000", 4) = 4 [pid 5175] close(3) = 0 [pid 5175] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5175] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5175] memfd_create("syzkaller", 0) = 4 [pid 5175] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5175] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5175] munmap(0x7f3f2898f000, 262144) = 0 [pid 5175] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.750546][ T5173] loop0: detected capacity change from 0 to 512 [ 49.759041][ T5173] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.772679][ T5173] EXT4-fs (loop0): 1 truncate cleaned up [pid 5175] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5175] close(4) = 0 [pid 5175] mkdir("./file1", 0777) = 0 [pid 5175] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5175] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5175] chdir("./file1") = 0 [pid 5175] ioctl(5, LOOP_CLR_FD) = 0 [pid 5175] close(5) = 0 [pid 5175] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5175] creat("./file1", 000) = 5 [pid 5175] exit_group(0) = ? [pid 5175] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5175, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./86", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./86/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./86/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./86/binderfs") = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./86/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./86/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./86") = 0 mkdir("./87", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5177 ./strace-static-x86_64: Process 5177 attached [pid 5177] chdir("./87") = 0 [pid 5177] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5177] setpgid(0, 0) = 0 [pid 5177] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5177] write(3, "1000", 4) = 4 [pid 5177] close(3) = 0 [pid 5177] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5177] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5177] memfd_create("syzkaller", 0) = 4 [pid 5177] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5177] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5177] munmap(0x7f3f2898f000, 262144) = 0 [pid 5177] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.807830][ T5175] loop0: detected capacity change from 0 to 512 [ 49.816947][ T5175] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.830374][ T5175] EXT4-fs (loop0): 1 truncate cleaned up [pid 5177] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5177] close(4) = 0 [pid 5177] mkdir("./file1", 0777) = 0 [pid 5177] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5177] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5177] chdir("./file1") = 0 [pid 5177] ioctl(5, LOOP_CLR_FD) = 0 [pid 5177] close(5) = 0 [pid 5177] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5177] creat("./file1", 000) = 5 [pid 5177] exit_group(0) = ? [pid 5177] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5177, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./87", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./87", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./87/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./87/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./87/binderfs") = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./87/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./87/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./87/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./87") = 0 mkdir("./88", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5179 attached , child_tidptr=0x555556c935d0) = 5179 [pid 5179] chdir("./88") = 0 [pid 5179] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5179] setpgid(0, 0) = 0 [pid 5179] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5179] write(3, "1000", 4) = 4 [pid 5179] close(3) = 0 [pid 5179] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5179] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5179] memfd_create("syzkaller", 0) = 4 [pid 5179] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5179] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5179] munmap(0x7f3f2898f000, 262144) = 0 [pid 5179] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.863686][ T5177] loop0: detected capacity change from 0 to 512 [ 49.872306][ T5177] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.885386][ T5177] EXT4-fs (loop0): 1 truncate cleaned up [pid 5179] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5179] close(4) = 0 [pid 5179] mkdir("./file1", 0777) = 0 [pid 5179] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5179] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5179] chdir("./file1") = 0 [pid 5179] ioctl(5, LOOP_CLR_FD) = 0 [pid 5179] close(5) = 0 [pid 5179] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5179] creat("./file1", 000) = 5 [pid 5179] exit_group(0) = ? [pid 5179] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5179, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./88", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./88/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./88/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./88/binderfs") = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./88/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./88/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./88") = 0 mkdir("./89", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5181 ./strace-static-x86_64: Process 5181 attached [pid 5181] chdir("./89") = 0 [pid 5181] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5181] setpgid(0, 0) = 0 [pid 5181] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5181] write(3, "1000", 4) = 4 [pid 5181] close(3) = 0 [pid 5181] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5181] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5181] memfd_create("syzkaller", 0) = 4 [pid 5181] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5181] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5181] munmap(0x7f3f2898f000, 262144) = 0 [pid 5181] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.931547][ T5179] loop0: detected capacity change from 0 to 512 [ 49.939281][ T5179] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 49.952680][ T5179] EXT4-fs (loop0): 1 truncate cleaned up [pid 5181] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5181] close(4) = 0 [pid 5181] mkdir("./file1", 0777) = 0 [pid 5181] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5181] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5181] chdir("./file1") = 0 [pid 5181] ioctl(5, LOOP_CLR_FD) = 0 [pid 5181] close(5) = 0 [pid 5181] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5181] creat("./file1", 000) = 5 [pid 5181] exit_group(0) = ? [pid 5181] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5181, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./89", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./89/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./89/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./89/binderfs") = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./89/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./89/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./89") = 0 mkdir("./90", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5183 ./strace-static-x86_64: Process 5183 attached [pid 5183] chdir("./90") = 0 [pid 5183] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5183] setpgid(0, 0) = 0 [pid 5183] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5183] write(3, "1000", 4) = 4 [pid 5183] close(3) = 0 [pid 5183] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5183] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5183] memfd_create("syzkaller", 0) = 4 [pid 5183] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5183] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5183] munmap(0x7f3f2898f000, 262144) = 0 [pid 5183] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 49.989213][ T5181] loop0: detected capacity change from 0 to 512 [ 49.997456][ T5181] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.011114][ T5181] EXT4-fs (loop0): 1 truncate cleaned up [pid 5183] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5183] close(4) = 0 [pid 5183] mkdir("./file1", 0777) = 0 [pid 5183] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5183] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5183] chdir("./file1") = 0 [pid 5183] ioctl(5, LOOP_CLR_FD) = 0 [pid 5183] close(5) = 0 [pid 5183] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5183] creat("./file1", 000) = 5 [pid 5183] exit_group(0) = ? [pid 5183] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5183, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./90", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./90", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./90/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./90/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./90/binderfs") = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./90/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./90/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./90/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./90") = 0 mkdir("./91", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5185 attached , child_tidptr=0x555556c935d0) = 5185 [pid 5185] chdir("./91") = 0 [pid 5185] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5185] setpgid(0, 0) = 0 [pid 5185] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5185] write(3, "1000", 4) = 4 [pid 5185] close(3) = 0 [pid 5185] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5185] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5185] memfd_create("syzkaller", 0) = 4 [pid 5185] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [ 50.037445][ T5183] loop0: detected capacity change from 0 to 512 [ 50.045190][ T5183] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.058811][ T5183] EXT4-fs (loop0): 1 truncate cleaned up [pid 5185] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5185] munmap(0x7f3f2898f000, 262144) = 0 [pid 5185] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5185] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5185] close(4) = 0 [pid 5185] mkdir("./file1", 0777) = 0 [pid 5185] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5185] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5185] chdir("./file1") = 0 [pid 5185] ioctl(5, LOOP_CLR_FD) = 0 [pid 5185] close(5) = 0 [pid 5185] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5185] creat("./file1", 000) = 5 [pid 5185] exit_group(0) = ? [pid 5185] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5185, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./91", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./91/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./91/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./91/binderfs") = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./91/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./91/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./91") = 0 mkdir("./92", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5187 ./strace-static-x86_64: Process 5187 attached [pid 5187] chdir("./92") = 0 [pid 5187] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5187] setpgid(0, 0) = 0 [pid 5187] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5187] write(3, "1000", 4) = 4 [pid 5187] close(3) = 0 [pid 5187] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5187] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5187] memfd_create("syzkaller", 0) = 4 [pid 5187] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5187] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5187] munmap(0x7f3f2898f000, 262144) = 0 [pid 5187] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.102475][ T5185] loop0: detected capacity change from 0 to 512 [ 50.110597][ T5185] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.123987][ T5185] EXT4-fs (loop0): 1 truncate cleaned up [pid 5187] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5187] close(4) = 0 [pid 5187] mkdir("./file1", 0777) = 0 [pid 5187] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5187] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5187] chdir("./file1") = 0 [pid 5187] ioctl(5, LOOP_CLR_FD) = 0 [pid 5187] close(5) = 0 [pid 5187] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5187] creat("./file1", 000) = 5 [pid 5187] exit_group(0) = ? [pid 5187] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5187, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./92", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./92/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./92/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./92/binderfs") = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./92/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./92/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./92") = 0 mkdir("./93", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5189 ./strace-static-x86_64: Process 5189 attached [pid 5189] chdir("./93") = 0 [pid 5189] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5189] setpgid(0, 0) = 0 [pid 5189] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5189] write(3, "1000", 4) = 4 [pid 5189] close(3) = 0 [pid 5189] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5189] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5189] memfd_create("syzkaller", 0) = 4 [pid 5189] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5189] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5189] munmap(0x7f3f2898f000, 262144) = 0 [pid 5189] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.158933][ T5187] loop0: detected capacity change from 0 to 512 [ 50.166750][ T5187] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.180289][ T5187] EXT4-fs (loop0): 1 truncate cleaned up [pid 5189] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5189] close(4) = 0 [pid 5189] mkdir("./file1", 0777) = 0 [pid 5189] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5189] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5189] chdir("./file1") = 0 [pid 5189] ioctl(5, LOOP_CLR_FD) = 0 [pid 5189] close(5) = 0 [pid 5189] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5189] creat("./file1", 000) = 5 [pid 5189] exit_group(0) = ? [pid 5189] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5189, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./93", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./93", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./93/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./93/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./93/binderfs") = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./93/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./93/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./93/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./93") = 0 mkdir("./94", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5191 ./strace-static-x86_64: Process 5191 attached [pid 5191] chdir("./94") = 0 [pid 5191] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5191] setpgid(0, 0) = 0 [pid 5191] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5191] write(3, "1000", 4) = 4 [pid 5191] close(3) = 0 [pid 5191] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5191] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5191] memfd_create("syzkaller", 0) = 4 [pid 5191] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5191] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5191] munmap(0x7f3f2898f000, 262144) = 0 [pid 5191] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.216145][ T5189] loop0: detected capacity change from 0 to 512 [ 50.224127][ T5189] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.238833][ T5189] EXT4-fs (loop0): 1 truncate cleaned up [pid 5191] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5191] close(4) = 0 [pid 5191] mkdir("./file1", 0777) = 0 [pid 5191] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5191] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5191] chdir("./file1") = 0 [pid 5191] ioctl(5, LOOP_CLR_FD) = 0 [pid 5191] close(5) = 0 [pid 5191] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5191] creat("./file1", 000) = 5 [pid 5191] exit_group(0) = ? [pid 5191] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5191, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./94", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./94/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./94/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./94/binderfs") = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./94/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./94/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./94") = 0 mkdir("./95", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5193 attached , child_tidptr=0x555556c935d0) = 5193 [pid 5193] chdir("./95") = 0 [pid 5193] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5193] setpgid(0, 0) = 0 [pid 5193] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5193] write(3, "1000", 4) = 4 [pid 5193] close(3) = 0 [pid 5193] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5193] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5193] memfd_create("syzkaller", 0) = 4 [pid 5193] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5193] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [ 50.279023][ T5191] loop0: detected capacity change from 0 to 512 [ 50.287087][ T5191] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.300303][ T5191] EXT4-fs (loop0): 1 truncate cleaned up [pid 5193] munmap(0x7f3f2898f000, 262144) = 0 [pid 5193] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5193] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5193] close(4) = 0 [pid 5193] mkdir("./file1", 0777) = 0 [pid 5193] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5193] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5193] chdir("./file1") = 0 [pid 5193] ioctl(5, LOOP_CLR_FD) = 0 [pid 5193] close(5) = 0 [pid 5193] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5193] creat("./file1", 000) = 5 [pid 5193] exit_group(0) = ? [pid 5193] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5193, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./95", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./95", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./95/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./95/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./95/binderfs") = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./95/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./95/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./95/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./95") = 0 mkdir("./96", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5195 ./strace-static-x86_64: Process 5195 attached [pid 5195] chdir("./96") = 0 [pid 5195] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5195] setpgid(0, 0) = 0 [pid 5195] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5195] write(3, "1000", 4) = 4 [pid 5195] close(3) = 0 [pid 5195] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5195] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5195] memfd_create("syzkaller", 0) = 4 [pid 5195] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5195] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5195] munmap(0x7f3f2898f000, 262144) = 0 [pid 5195] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.338712][ T5193] loop0: detected capacity change from 0 to 512 [ 50.348472][ T5193] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.362324][ T5193] EXT4-fs (loop0): 1 truncate cleaned up [pid 5195] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5195] close(4) = 0 [pid 5195] mkdir("./file1", 0777) = 0 [pid 5195] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5195] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5195] chdir("./file1") = 0 [pid 5195] ioctl(5, LOOP_CLR_FD) = 0 [pid 5195] close(5) = 0 [pid 5195] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5195] creat("./file1", 000) = 5 [pid 5195] exit_group(0) = ? [pid 5195] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5195, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./96", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./96", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./96/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./96/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./96/binderfs") = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./96/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./96/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./96/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./96") = 0 mkdir("./97", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5197 ./strace-static-x86_64: Process 5197 attached [pid 5197] chdir("./97") = 0 [pid 5197] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5197] setpgid(0, 0) = 0 [pid 5197] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5197] write(3, "1000", 4) = 4 [pid 5197] close(3) = 0 [pid 5197] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5197] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5197] memfd_create("syzkaller", 0) = 4 [pid 5197] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5197] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5197] munmap(0x7f3f2898f000, 262144) = 0 [pid 5197] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.396147][ T5195] loop0: detected capacity change from 0 to 512 [ 50.404203][ T5195] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.417751][ T5195] EXT4-fs (loop0): 1 truncate cleaned up [pid 5197] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5197] close(4) = 0 [pid 5197] mkdir("./file1", 0777) = 0 [pid 5197] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5197] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5197] chdir("./file1") = 0 [pid 5197] ioctl(5, LOOP_CLR_FD) = 0 [pid 5197] close(5) = 0 [pid 5197] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5197] creat("./file1", 000) = 5 [pid 5197] exit_group(0) = ? [pid 5197] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5197, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./97", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./97/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./97/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./97/binderfs") = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./97/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./97/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./97") = 0 mkdir("./98", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5199 ./strace-static-x86_64: Process 5199 attached [pid 5199] chdir("./98") = 0 [pid 5199] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5199] setpgid(0, 0) = 0 [pid 5199] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5199] write(3, "1000", 4) = 4 [pid 5199] close(3) = 0 [pid 5199] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5199] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5199] memfd_create("syzkaller", 0) = 4 [pid 5199] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5199] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5199] munmap(0x7f3f2898f000, 262144) = 0 [pid 5199] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.452831][ T5197] loop0: detected capacity change from 0 to 512 [ 50.460552][ T5197] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.473686][ T5197] EXT4-fs (loop0): 1 truncate cleaned up [pid 5199] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5199] close(4) = 0 [pid 5199] mkdir("./file1", 0777) = 0 [pid 5199] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5199] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5199] chdir("./file1") = 0 [pid 5199] ioctl(5, LOOP_CLR_FD) = 0 [pid 5199] close(5) = 0 [pid 5199] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5199] creat("./file1", 000) = 5 [pid 5199] exit_group(0) = ? [pid 5199] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5199, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./98", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./98/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./98/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./98/binderfs") = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./98/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./98/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./98") = 0 mkdir("./99", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5201 ./strace-static-x86_64: Process 5201 attached [pid 5201] chdir("./99") = 0 [pid 5201] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5201] setpgid(0, 0) = 0 [pid 5201] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5201] write(3, "1000", 4) = 4 [pid 5201] close(3) = 0 [pid 5201] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5201] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5201] memfd_create("syzkaller", 0) = 4 [pid 5201] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5201] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5201] munmap(0x7f3f2898f000, 262144) = 0 [ 50.513733][ T5199] loop0: detected capacity change from 0 to 512 [ 50.521645][ T5199] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.535448][ T5199] EXT4-fs (loop0): 1 truncate cleaned up [pid 5201] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5201] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5201] close(4) = 0 [pid 5201] mkdir("./file1", 0777) = 0 [pid 5201] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5201] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5201] chdir("./file1") = 0 [pid 5201] ioctl(5, LOOP_CLR_FD) = 0 [pid 5201] close(5) = 0 [pid 5201] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5201] creat("./file1", 000) = 5 [pid 5201] exit_group(0) = ? [pid 5201] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5201, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./99", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./99/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./99/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./99/binderfs") = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./99/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./99/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./99") = 0 mkdir("./100", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5203 ./strace-static-x86_64: Process 5203 attached [pid 5203] chdir("./100") = 0 [pid 5203] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5203] setpgid(0, 0) = 0 [pid 5203] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5203] write(3, "1000", 4) = 4 [pid 5203] close(3) = 0 [pid 5203] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5203] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5203] memfd_create("syzkaller", 0) = 4 [pid 5203] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5203] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5203] munmap(0x7f3f2898f000, 262144) = 0 [pid 5203] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.567595][ T5201] loop0: detected capacity change from 0 to 512 [ 50.575456][ T5201] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.588556][ T5201] EXT4-fs (loop0): 1 truncate cleaned up [pid 5203] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5203] close(4) = 0 [pid 5203] mkdir("./file1", 0777) = 0 [pid 5203] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5203] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5203] chdir("./file1") = 0 [pid 5203] ioctl(5, LOOP_CLR_FD) = 0 [pid 5203] close(5) = 0 [pid 5203] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5203] creat("./file1", 000) = 5 [pid 5203] exit_group(0) = ? [pid 5203] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5203, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./100", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./100/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./100/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./100/binderfs") = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./100/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./100/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./100") = 0 mkdir("./101", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5205 ./strace-static-x86_64: Process 5205 attached [pid 5205] chdir("./101") = 0 [pid 5205] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5205] setpgid(0, 0) = 0 [pid 5205] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5205] write(3, "1000", 4) = 4 [pid 5205] close(3) = 0 [pid 5205] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5205] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5205] memfd_create("syzkaller", 0) = 4 [pid 5205] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [ 50.612641][ T5203] loop0: detected capacity change from 0 to 512 [ 50.621402][ T5203] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.634197][ T5203] EXT4-fs (loop0): 1 truncate cleaned up [pid 5205] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5205] munmap(0x7f3f2898f000, 262144) = 0 [pid 5205] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5205] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5205] close(4) = 0 [pid 5205] mkdir("./file1", 0777) = 0 [pid 5205] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5205] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5205] chdir("./file1") = 0 [pid 5205] ioctl(5, LOOP_CLR_FD) = 0 [pid 5205] close(5) = 0 [pid 5205] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5205] creat("./file1", 000) = 5 [pid 5205] exit_group(0) = ? [pid 5205] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5205, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./101", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./101/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./101/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./101/binderfs") = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./101/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./101/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./101") = 0 mkdir("./102", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5207 ./strace-static-x86_64: Process 5207 attached [pid 5207] chdir("./102") = 0 [pid 5207] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5207] setpgid(0, 0) = 0 [pid 5207] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5207] write(3, "1000", 4) = 4 [pid 5207] close(3) = 0 [pid 5207] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5207] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5207] memfd_create("syzkaller", 0) = 4 [pid 5207] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5207] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5207] munmap(0x7f3f2898f000, 262144) = 0 [pid 5207] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.666838][ T5205] loop0: detected capacity change from 0 to 512 [ 50.674223][ T5205] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.687639][ T5205] EXT4-fs (loop0): 1 truncate cleaned up [pid 5207] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5207] close(4) = 0 [pid 5207] mkdir("./file1", 0777) = 0 [pid 5207] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5207] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5207] chdir("./file1") = 0 [pid 5207] ioctl(5, LOOP_CLR_FD) = 0 [pid 5207] close(5) = 0 [pid 5207] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5207] creat("./file1", 000) = 5 [pid 5207] exit_group(0) = ? [pid 5207] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5207, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./102", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./102/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./102/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./102/binderfs") = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./102/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./102/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./102") = 0 mkdir("./103", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5209 ./strace-static-x86_64: Process 5209 attached [pid 5209] chdir("./103") = 0 [pid 5209] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5209] setpgid(0, 0) = 0 [pid 5209] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5209] write(3, "1000", 4) = 4 [pid 5209] close(3) = 0 [pid 5209] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5209] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5209] memfd_create("syzkaller", 0) = 4 [pid 5209] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5209] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5209] munmap(0x7f3f2898f000, 262144) = 0 [pid 5209] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.717506][ T5207] loop0: detected capacity change from 0 to 512 [ 50.725171][ T5207] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.738328][ T5207] EXT4-fs (loop0): 1 truncate cleaned up [pid 5209] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5209] close(4) = 0 [pid 5209] mkdir("./file1", 0777) = 0 [pid 5209] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5209] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5209] chdir("./file1") = 0 [pid 5209] ioctl(5, LOOP_CLR_FD) = 0 [pid 5209] close(5) = 0 [pid 5209] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5209] creat("./file1", 000) = 5 [pid 5209] exit_group(0) = ? [pid 5209] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5209, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./103", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./103", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./103/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./103/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./103/binderfs") = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./103/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./103/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./103/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./103") = 0 mkdir("./104", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5211 ./strace-static-x86_64: Process 5211 attached [pid 5211] chdir("./104") = 0 [pid 5211] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5211] setpgid(0, 0) = 0 [pid 5211] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5211] write(3, "1000", 4) = 4 [pid 5211] close(3) = 0 [pid 5211] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5211] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5211] memfd_create("syzkaller", 0) = 4 [pid 5211] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5211] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5211] munmap(0x7f3f2898f000, 262144) = 0 [pid 5211] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.769071][ T5209] loop0: detected capacity change from 0 to 512 [ 50.777445][ T5209] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.790620][ T5209] EXT4-fs (loop0): 1 truncate cleaned up [pid 5211] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5211] close(4) = 0 [pid 5211] mkdir("./file1", 0777) = 0 [pid 5211] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5211] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5211] chdir("./file1") = 0 [pid 5211] ioctl(5, LOOP_CLR_FD) = 0 [pid 5211] close(5) = 0 [pid 5211] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5211] creat("./file1", 000) = 5 [pid 5211] exit_group(0) = ? [pid 5211] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5211, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./104", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./104/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./104/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./104/binderfs") = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./104/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./104/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./104") = 0 mkdir("./105", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5213 ./strace-static-x86_64: Process 5213 attached [pid 5213] chdir("./105") = 0 [pid 5213] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5213] setpgid(0, 0) = 0 [pid 5213] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5213] write(3, "1000", 4) = 4 [pid 5213] close(3) = 0 [pid 5213] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5213] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5213] memfd_create("syzkaller", 0) = 4 [pid 5213] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5213] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5213] munmap(0x7f3f2898f000, 262144) = 0 [pid 5213] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.825134][ T5211] loop0: detected capacity change from 0 to 512 [ 50.833048][ T5211] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.846919][ T5211] EXT4-fs (loop0): 1 truncate cleaned up [pid 5213] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5213] close(4) = 0 [pid 5213] mkdir("./file1", 0777) = 0 [pid 5213] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5213] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5213] chdir("./file1") = 0 [pid 5213] ioctl(5, LOOP_CLR_FD) = 0 [pid 5213] close(5) = 0 [pid 5213] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5213] creat("./file1", 000) = 5 [pid 5213] exit_group(0) = ? [pid 5213] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5213, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./105", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./105/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./105/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./105/binderfs") = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./105/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./105/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./105") = 0 mkdir("./106", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5215 attached , child_tidptr=0x555556c935d0) = 5215 [pid 5215] chdir("./106") = 0 [pid 5215] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5215] setpgid(0, 0) = 0 [pid 5215] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5215] write(3, "1000", 4) = 4 [pid 5215] close(3) = 0 [pid 5215] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5215] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5215] memfd_create("syzkaller", 0) = 4 [pid 5215] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5215] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5215] munmap(0x7f3f2898f000, 262144) = 0 [pid 5215] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.874618][ T5213] loop0: detected capacity change from 0 to 512 [ 50.882753][ T5213] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.896254][ T5213] EXT4-fs (loop0): 1 truncate cleaned up [pid 5215] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5215] close(4) = 0 [pid 5215] mkdir("./file1", 0777) = 0 [pid 5215] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5215] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5215] chdir("./file1") = 0 [pid 5215] ioctl(5, LOOP_CLR_FD) = 0 [pid 5215] close(5) = 0 [pid 5215] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5215] creat("./file1", 000) = 5 [pid 5215] exit_group(0) = ? [pid 5215] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5215, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./106", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./106", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./106/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./106/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./106/binderfs") = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./106/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./106/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./106/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./106") = 0 mkdir("./107", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5217 ./strace-static-x86_64: Process 5217 attached [pid 5217] chdir("./107") = 0 [pid 5217] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5217] setpgid(0, 0) = 0 [pid 5217] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5217] write(3, "1000", 4) = 4 [pid 5217] close(3) = 0 [pid 5217] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5217] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5217] memfd_create("syzkaller", 0) = 4 [pid 5217] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5217] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5217] munmap(0x7f3f2898f000, 262144) = 0 [pid 5217] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 50.941894][ T5215] loop0: detected capacity change from 0 to 512 [ 50.949900][ T5215] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 50.963416][ T5215] EXT4-fs (loop0): 1 truncate cleaned up [pid 5217] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5217] close(4) = 0 [pid 5217] mkdir("./file1", 0777) = 0 [pid 5217] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5217] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5217] chdir("./file1") = 0 [pid 5217] ioctl(5, LOOP_CLR_FD) = 0 [pid 5217] close(5) = 0 [pid 5217] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5217] creat("./file1", 000) = 5 [pid 5217] exit_group(0) = ? [pid 5217] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5217, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./107", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./107", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./107/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./107/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./107/binderfs") = 0 umount2("./107/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./107/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./107/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./107/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./107/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./107/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./107") = 0 mkdir("./108", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5219 ./strace-static-x86_64: Process 5219 attached [pid 5219] chdir("./108") = 0 [pid 5219] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5219] setpgid(0, 0) = 0 [pid 5219] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5219] write(3, "1000", 4) = 4 [pid 5219] close(3) = 0 [pid 5219] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5219] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5219] memfd_create("syzkaller", 0) = 4 [pid 5219] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5219] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5219] munmap(0x7f3f2898f000, 262144) = 0 [pid 5219] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.006549][ T5217] loop0: detected capacity change from 0 to 512 [ 51.014356][ T5217] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.028048][ T5217] EXT4-fs (loop0): 1 truncate cleaned up [pid 5219] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5219] close(4) = 0 [pid 5219] mkdir("./file1", 0777) = 0 [pid 5219] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5219] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5219] chdir("./file1") = 0 [pid 5219] ioctl(5, LOOP_CLR_FD) = 0 [pid 5219] close(5) = 0 [pid 5219] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5219] creat("./file1", 000) = 5 [pid 5219] exit_group(0) = ? [pid 5219] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5219, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./108", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./108", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./108/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./108/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./108/binderfs") = 0 umount2("./108/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./108/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./108/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./108/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./108/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./108/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./108") = 0 mkdir("./109", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5221 ./strace-static-x86_64: Process 5221 attached [pid 5221] chdir("./109") = 0 [pid 5221] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5221] setpgid(0, 0) = 0 [pid 5221] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5221] write(3, "1000", 4) = 4 [pid 5221] close(3) = 0 [pid 5221] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5221] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5221] memfd_create("syzkaller", 0) = 4 [pid 5221] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5221] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5221] munmap(0x7f3f2898f000, 262144) = 0 [pid 5221] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.059861][ T5219] loop0: detected capacity change from 0 to 512 [ 51.068241][ T5219] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.082130][ T5219] EXT4-fs (loop0): 1 truncate cleaned up [pid 5221] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5221] close(4) = 0 [pid 5221] mkdir("./file1", 0777) = 0 [pid 5221] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5221] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5221] chdir("./file1") = 0 [pid 5221] ioctl(5, LOOP_CLR_FD) = 0 [pid 5221] close(5) = 0 [pid 5221] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5221] creat("./file1", 000) = 5 [pid 5221] exit_group(0) = ? [pid 5221] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5221, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./109", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./109", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./109/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./109/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./109/binderfs") = 0 umount2("./109/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./109/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./109/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./109/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./109/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./109/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./109") = 0 mkdir("./110", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5223 ./strace-static-x86_64: Process 5223 attached [pid 5223] chdir("./110") = 0 [pid 5223] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5223] setpgid(0, 0) = 0 [pid 5223] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5223] write(3, "1000", 4) = 4 [pid 5223] close(3) = 0 [pid 5223] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5223] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5223] memfd_create("syzkaller", 0) = 4 [pid 5223] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5223] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5223] munmap(0x7f3f2898f000, 262144) = 0 [pid 5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.113503][ T5221] loop0: detected capacity change from 0 to 512 [ 51.121941][ T5221] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.135181][ T5221] EXT4-fs (loop0): 1 truncate cleaned up [pid 5223] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5223] close(4) = 0 [pid 5223] mkdir("./file1", 0777) = 0 [pid 5223] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5223] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5223] chdir("./file1") = 0 [pid 5223] ioctl(5, LOOP_CLR_FD) = 0 [pid 5223] close(5) = 0 [pid 5223] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5223] creat("./file1", 000) = 5 [pid 5223] exit_group(0) = ? [pid 5223] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5223, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./110", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./110", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./110/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./110/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./110/binderfs") = 0 umount2("./110/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./110/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./110/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./110/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./110/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./110/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./110") = 0 mkdir("./111", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5225 ./strace-static-x86_64: Process 5225 attached [pid 5225] chdir("./111") = 0 [pid 5225] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5225] setpgid(0, 0) = 0 [pid 5225] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5225] write(3, "1000", 4) = 4 [pid 5225] close(3) = 0 [pid 5225] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5225] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5225] memfd_create("syzkaller", 0) = 4 [pid 5225] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5225] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5225] munmap(0x7f3f2898f000, 262144) = 0 [pid 5225] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.182810][ T5223] loop0: detected capacity change from 0 to 512 [ 51.190830][ T5223] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.204376][ T5223] EXT4-fs (loop0): 1 truncate cleaned up [pid 5225] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5225] close(4) = 0 [pid 5225] mkdir("./file1", 0777) = 0 [pid 5225] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5225] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5225] chdir("./file1") = 0 [pid 5225] ioctl(5, LOOP_CLR_FD) = 0 [pid 5225] close(5) = 0 [pid 5225] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5225] creat("./file1", 000) = 5 [pid 5225] exit_group(0) = ? [pid 5225] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5225, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./111", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./111", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./111/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./111/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./111/binderfs") = 0 umount2("./111/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./111/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./111/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./111/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./111/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./111/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./111") = 0 mkdir("./112", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5227 attached , child_tidptr=0x555556c935d0) = 5227 [pid 5227] chdir("./112") = 0 [pid 5227] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5227] setpgid(0, 0) = 0 [pid 5227] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5227] write(3, "1000", 4) = 4 [pid 5227] close(3) = 0 [pid 5227] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5227] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5227] memfd_create("syzkaller", 0) = 4 [pid 5227] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5227] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5227] munmap(0x7f3f2898f000, 262144) = 0 [pid 5227] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.238039][ T5225] loop0: detected capacity change from 0 to 512 [ 51.245804][ T5225] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.259493][ T5225] EXT4-fs (loop0): 1 truncate cleaned up [pid 5227] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5227] close(4) = 0 [pid 5227] mkdir("./file1", 0777) = 0 [pid 5227] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5227] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5227] chdir("./file1") = 0 [pid 5227] ioctl(5, LOOP_CLR_FD) = 0 [pid 5227] close(5) = 0 [pid 5227] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5227] creat("./file1", 000) = 5 [pid 5227] exit_group(0) = ? [pid 5227] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5227, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./112", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./112", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./112/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./112/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./112/binderfs") = 0 umount2("./112/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./112/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./112/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./112/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./112/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./112/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./112") = 0 mkdir("./113", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5229 ./strace-static-x86_64: Process 5229 attached [pid 5229] chdir("./113") = 0 [pid 5229] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5229] setpgid(0, 0) = 0 [pid 5229] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5229] write(3, "1000", 4) = 4 [pid 5229] close(3) = 0 [pid 5229] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5229] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5229] memfd_create("syzkaller", 0) = 4 [pid 5229] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5229] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5229] munmap(0x7f3f2898f000, 262144) = 0 [pid 5229] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.299894][ T5227] loop0: detected capacity change from 0 to 512 [ 51.307998][ T5227] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.321997][ T5227] EXT4-fs (loop0): 1 truncate cleaned up [pid 5229] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5229] close(4) = 0 [pid 5229] mkdir("./file1", 0777) = 0 [pid 5229] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5229] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5229] chdir("./file1") = 0 [pid 5229] ioctl(5, LOOP_CLR_FD) = 0 [pid 5229] close(5) = 0 [pid 5229] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5229] creat("./file1", 000) = 5 [pid 5229] exit_group(0) = ? [pid 5229] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5229, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./113", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./113", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./113/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./113/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./113/binderfs") = 0 umount2("./113/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./113/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./113/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./113/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./113/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./113/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./113") = 0 mkdir("./114", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5231 ./strace-static-x86_64: Process 5231 attached [pid 5231] chdir("./114") = 0 [pid 5231] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5231] setpgid(0, 0) = 0 [pid 5231] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5231] write(3, "1000", 4) = 4 [pid 5231] close(3) = 0 [pid 5231] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5231] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5231] memfd_create("syzkaller", 0) = 4 [pid 5231] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5231] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5231] munmap(0x7f3f2898f000, 262144) = 0 [pid 5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.360805][ T5229] loop0: detected capacity change from 0 to 512 [ 51.368654][ T5229] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.381772][ T5229] EXT4-fs (loop0): 1 truncate cleaned up [pid 5231] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5231] close(4) = 0 [pid 5231] mkdir("./file1", 0777) = 0 [pid 5231] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5231] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5231] chdir("./file1") = 0 [pid 5231] ioctl(5, LOOP_CLR_FD) = 0 [pid 5231] close(5) = 0 [pid 5231] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5231] creat("./file1", 000) = 5 [pid 5231] exit_group(0) = ? [pid 5231] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5231, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./114", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./114", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./114/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./114/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./114/binderfs") = 0 umount2("./114/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./114/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./114/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./114/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./114/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./114/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./114") = 0 mkdir("./115", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5233 ./strace-static-x86_64: Process 5233 attached [pid 5233] chdir("./115") = 0 [pid 5233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5233] setpgid(0, 0) = 0 [pid 5233] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5233] write(3, "1000", 4) = 4 [pid 5233] close(3) = 0 [pid 5233] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5233] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5233] memfd_create("syzkaller", 0) = 4 [pid 5233] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5233] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5233] munmap(0x7f3f2898f000, 262144) = 0 [pid 5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.420648][ T5231] loop0: detected capacity change from 0 to 512 [ 51.429003][ T5231] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.442232][ T5231] EXT4-fs (loop0): 1 truncate cleaned up [pid 5233] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5233] close(4) = 0 [pid 5233] mkdir("./file1", 0777) = 0 [pid 5233] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5233] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5233] chdir("./file1") = 0 [pid 5233] ioctl(5, LOOP_CLR_FD) = 0 [pid 5233] close(5) = 0 [pid 5233] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5233] creat("./file1", 000) = 5 [pid 5233] exit_group(0) = ? [pid 5233] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5233, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./115", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./115", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./115/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./115/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./115/binderfs") = 0 umount2("./115/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./115/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./115/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./115/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./115/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./115/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./115") = 0 mkdir("./116", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5235 attached [pid 5235] chdir("./116") = 0 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5235 [pid 5235] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5235] setpgid(0, 0) = 0 [pid 5235] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5235] write(3, "1000", 4) = 4 [pid 5235] close(3) = 0 [pid 5235] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5235] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5235] memfd_create("syzkaller", 0) = 4 [pid 5235] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5235] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5235] munmap(0x7f3f2898f000, 262144) = 0 [pid 5235] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.473505][ T5233] loop0: detected capacity change from 0 to 512 [ 51.481789][ T5233] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.494815][ T5233] EXT4-fs (loop0): 1 truncate cleaned up [pid 5235] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5235] close(4) = 0 [pid 5235] mkdir("./file1", 0777) = 0 [pid 5235] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5235] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5235] chdir("./file1") = 0 [pid 5235] ioctl(5, LOOP_CLR_FD) = 0 [pid 5235] close(5) = 0 [pid 5235] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5235] creat("./file1", 000) = 5 [pid 5235] exit_group(0) = ? [pid 5235] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5235, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./116", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./116", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./116/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./116/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./116/binderfs") = 0 umount2("./116/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./116/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./116/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./116/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./116/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./116/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./116") = 0 mkdir("./117", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5237 attached , child_tidptr=0x555556c935d0) = 5237 [pid 5237] chdir("./117") = 0 [pid 5237] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5237] setpgid(0, 0) = 0 [pid 5237] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5237] write(3, "1000", 4) = 4 [pid 5237] close(3) = 0 [pid 5237] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5237] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5237] memfd_create("syzkaller", 0) = 4 [pid 5237] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5237] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5237] munmap(0x7f3f2898f000, 262144) = 0 [pid 5237] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.529618][ T5235] loop0: detected capacity change from 0 to 512 [ 51.537770][ T5235] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.551559][ T5235] EXT4-fs (loop0): 1 truncate cleaned up [pid 5237] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5237] close(4) = 0 [pid 5237] mkdir("./file1", 0777) = 0 [pid 5237] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5237] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5237] chdir("./file1") = 0 [pid 5237] ioctl(5, LOOP_CLR_FD) = 0 [pid 5237] close(5) = 0 [pid 5237] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5237] creat("./file1", 000) = 5 [pid 5237] exit_group(0) = ? [pid 5237] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5237, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./117", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./117", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./117/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./117/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./117/binderfs") = 0 umount2("./117/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./117/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./117/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./117/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./117/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./117/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./117") = 0 mkdir("./118", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5239 ./strace-static-x86_64: Process 5239 attached [pid 5239] chdir("./118") = 0 [pid 5239] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5239] setpgid(0, 0) = 0 [pid 5239] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5239] write(3, "1000", 4) = 4 [pid 5239] close(3) = 0 [pid 5239] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5239] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5239] memfd_create("syzkaller", 0) = 4 [pid 5239] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5239] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5239] munmap(0x7f3f2898f000, 262144) = 0 [pid 5239] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.594129][ T5237] loop0: detected capacity change from 0 to 512 [ 51.602379][ T5237] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.615781][ T5237] EXT4-fs (loop0): 1 truncate cleaned up [pid 5239] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5239] close(4) = 0 [pid 5239] mkdir("./file1", 0777) = 0 [pid 5239] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5239] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5239] chdir("./file1") = 0 [pid 5239] ioctl(5, LOOP_CLR_FD) = 0 [pid 5239] close(5) = 0 [pid 5239] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5239] creat("./file1", 000) = 5 [pid 5239] exit_group(0) = ? [pid 5239] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5239, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./118", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./118", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./118/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./118/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./118/binderfs") = 0 umount2("./118/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./118/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./118/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./118/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./118/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./118/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./118") = 0 mkdir("./119", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5241 ./strace-static-x86_64: Process 5241 attached [pid 5241] chdir("./119") = 0 [pid 5241] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5241] setpgid(0, 0) = 0 [pid 5241] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5241] write(3, "1000", 4) = 4 [pid 5241] close(3) = 0 [pid 5241] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5241] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5241] memfd_create("syzkaller", 0) = 4 [pid 5241] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5241] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5241] munmap(0x7f3f2898f000, 262144) = 0 [pid 5241] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.649086][ T5239] loop0: detected capacity change from 0 to 512 [ 51.657271][ T5239] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.671462][ T5239] EXT4-fs (loop0): 1 truncate cleaned up [pid 5241] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5241] close(4) = 0 [pid 5241] mkdir("./file1", 0777) = 0 [pid 5241] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5241] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5241] chdir("./file1") = 0 [pid 5241] ioctl(5, LOOP_CLR_FD) = 0 [pid 5241] close(5) = 0 [pid 5241] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5241] creat("./file1", 000) = 5 [pid 5241] exit_group(0) = ? [pid 5241] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5241, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./119", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./119", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./119/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./119/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./119/binderfs") = 0 umount2("./119/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./119/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./119/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./119/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./119/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./119/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./119") = 0 mkdir("./120", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5243 ./strace-static-x86_64: Process 5243 attached [pid 5243] chdir("./120") = 0 [pid 5243] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5243] setpgid(0, 0) = 0 [pid 5243] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5243] write(3, "1000", 4) = 4 [pid 5243] close(3) = 0 [pid 5243] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5243] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5243] memfd_create("syzkaller", 0) = 4 [pid 5243] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5243] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5243] munmap(0x7f3f2898f000, 262144) = 0 [pid 5243] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.700898][ T5241] loop0: detected capacity change from 0 to 512 [ 51.709730][ T5241] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.723875][ T5241] EXT4-fs (loop0): 1 truncate cleaned up [pid 5243] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5243] close(4) = 0 [pid 5243] mkdir("./file1", 0777) = 0 [pid 5243] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5243] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5243] chdir("./file1") = 0 [pid 5243] ioctl(5, LOOP_CLR_FD) = 0 [pid 5243] close(5) = 0 [pid 5243] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5243] creat("./file1", 000) = 5 [pid 5243] exit_group(0) = ? [pid 5243] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5243, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./120", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./120", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./120/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./120/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./120/binderfs") = 0 umount2("./120/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./120/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./120/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./120/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./120/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./120/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./120") = 0 mkdir("./121", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5246 ./strace-static-x86_64: Process 5246 attached [pid 5246] chdir("./121") = 0 [pid 5246] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5246] setpgid(0, 0) = 0 [pid 5246] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5246] write(3, "1000", 4) = 4 [pid 5246] close(3) = 0 [pid 5246] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5246] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5246] memfd_create("syzkaller", 0) = 4 [pid 5246] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5246] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5246] munmap(0x7f3f2898f000, 262144) = 0 [pid 5246] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.757220][ T5243] loop0: detected capacity change from 0 to 512 [ 51.765474][ T5243] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.779108][ T5243] EXT4-fs (loop0): 1 truncate cleaned up [pid 5246] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5246] close(4) = 0 [pid 5246] mkdir("./file1", 0777) = 0 [pid 5246] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5246] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5246] chdir("./file1") = 0 [pid 5246] ioctl(5, LOOP_CLR_FD) = 0 [pid 5246] close(5) = 0 [pid 5246] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5246] creat("./file1", 000) = 5 [pid 5246] exit_group(0) = ? [pid 5246] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5246, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./121", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./121", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./121/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./121/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./121/binderfs") = 0 umount2("./121/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./121/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./121/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./121/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./121/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./121/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./121") = 0 mkdir("./122", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5248 ./strace-static-x86_64: Process 5248 attached [pid 5248] chdir("./122") = 0 [pid 5248] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5248] setpgid(0, 0) = 0 [pid 5248] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5248] write(3, "1000", 4) = 4 [pid 5248] close(3) = 0 [pid 5248] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5248] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5248] memfd_create("syzkaller", 0) = 4 [pid 5248] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5248] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5248] munmap(0x7f3f2898f000, 262144) = 0 [pid 5248] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.816907][ T5246] loop0: detected capacity change from 0 to 512 [ 51.825027][ T5246] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.839328][ T5246] EXT4-fs (loop0): 1 truncate cleaned up [pid 5248] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5248] close(4) = 0 [pid 5248] mkdir("./file1", 0777) = 0 [pid 5248] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5248] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5248] chdir("./file1") = 0 [pid 5248] ioctl(5, LOOP_CLR_FD) = 0 [pid 5248] close(5) = 0 [pid 5248] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5248] creat("./file1", 000) = 5 [pid 5248] exit_group(0) = ? [pid 5248] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5248, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./122", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./122", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./122/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./122/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./122/binderfs") = 0 umount2("./122/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./122/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./122/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./122/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./122/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./122/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./122") = 0 mkdir("./123", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5250 attached [pid 5250] chdir("./123") = 0 [pid 5250] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5250] setpgid(0, 0) = 0 [pid 5250] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5250] write(3, "1000", 4) = 4 [pid 5250] close(3) = 0 [pid 5250] symlink("/dev/binderfs", "./binderfs" [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5250 [pid 5250] <... symlink resumed>) = 0 [pid 5250] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5250] memfd_create("syzkaller", 0) = 4 [pid 5250] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5250] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5250] munmap(0x7f3f2898f000, 262144) = 0 [pid 5250] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.874451][ T5248] loop0: detected capacity change from 0 to 512 [ 51.882409][ T5248] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.895525][ T5248] EXT4-fs (loop0): 1 truncate cleaned up [pid 5250] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5250] close(4) = 0 [pid 5250] mkdir("./file1", 0777) = 0 [pid 5250] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5250] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5250] chdir("./file1") = 0 [pid 5250] ioctl(5, LOOP_CLR_FD) = 0 [pid 5250] close(5) = 0 [pid 5250] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5250] creat("./file1", 000) = 5 [pid 5250] exit_group(0) = ? [pid 5250] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5250, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./123", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./123", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./123/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./123/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./123/binderfs") = 0 umount2("./123/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./123/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./123/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./123/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./123/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./123/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./123") = 0 mkdir("./124", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5252 ./strace-static-x86_64: Process 5252 attached [pid 5252] chdir("./124") = 0 [pid 5252] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5252] setpgid(0, 0) = 0 [pid 5252] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5252] write(3, "1000", 4) = 4 [pid 5252] close(3) = 0 [pid 5252] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5252] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5252] memfd_create("syzkaller", 0) = 4 [pid 5252] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5252] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5252] munmap(0x7f3f2898f000, 262144) = 0 [pid 5252] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.928128][ T5250] loop0: detected capacity change from 0 to 512 [ 51.935940][ T5250] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 51.949142][ T5250] EXT4-fs (loop0): 1 truncate cleaned up [pid 5252] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5252] close(4) = 0 [pid 5252] mkdir("./file1", 0777) = 0 [pid 5252] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5252] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5252] chdir("./file1") = 0 [pid 5252] ioctl(5, LOOP_CLR_FD) = 0 [pid 5252] close(5) = 0 [pid 5252] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5252] creat("./file1", 000) = 5 [pid 5252] exit_group(0) = ? [pid 5252] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5252, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./124", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./124", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./124/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./124/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./124/binderfs") = 0 umount2("./124/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./124/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./124/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./124/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./124/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./124/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./124") = 0 mkdir("./125", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5254 attached , child_tidptr=0x555556c935d0) = 5254 [pid 5254] chdir("./125") = 0 [pid 5254] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5254] setpgid(0, 0) = 0 [pid 5254] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5254] write(3, "1000", 4) = 4 [pid 5254] close(3) = 0 [pid 5254] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5254] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5254] memfd_create("syzkaller", 0) = 4 [pid 5254] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5254] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5254] munmap(0x7f3f2898f000, 262144) = 0 [pid 5254] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 51.989572][ T5252] loop0: detected capacity change from 0 to 512 [ 51.997789][ T5252] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.011468][ T5252] EXT4-fs (loop0): 1 truncate cleaned up [pid 5254] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5254] close(4) = 0 [pid 5254] mkdir("./file1", 0777) = 0 [pid 5254] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5254] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5254] chdir("./file1") = 0 [pid 5254] ioctl(5, LOOP_CLR_FD) = 0 [pid 5254] close(5) = 0 [pid 5254] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5254] creat("./file1", 000) = 5 [pid 5254] exit_group(0) = ? [pid 5254] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5254, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./125", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./125", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./125/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./125/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./125/binderfs") = 0 umount2("./125/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./125/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./125/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./125/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./125/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./125/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./125") = 0 mkdir("./126", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5256 ./strace-static-x86_64: Process 5256 attached [pid 5256] chdir("./126") = 0 [pid 5256] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5256] setpgid(0, 0) = 0 [pid 5256] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5256] write(3, "1000", 4) = 4 [pid 5256] close(3) = 0 [pid 5256] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5256] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5256] memfd_create("syzkaller", 0) = 4 [pid 5256] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5256] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5256] munmap(0x7f3f2898f000, 262144) = 0 [pid 5256] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.052806][ T5254] loop0: detected capacity change from 0 to 512 [ 52.060465][ T5254] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.073573][ T5254] EXT4-fs (loop0): 1 truncate cleaned up [pid 5256] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5256] close(4) = 0 [pid 5256] mkdir("./file1", 0777) = 0 [pid 5256] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5256] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5256] chdir("./file1") = 0 [pid 5256] ioctl(5, LOOP_CLR_FD) = 0 [pid 5256] close(5) = 0 [pid 5256] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5256] creat("./file1", 000) = 5 [pid 5256] exit_group(0) = ? [pid 5256] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5256, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./126", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./126", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./126/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./126/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./126/binderfs") = 0 umount2("./126/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./126/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./126/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./126/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./126/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./126/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./126") = 0 mkdir("./127", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5258 ./strace-static-x86_64: Process 5258 attached [pid 5258] chdir("./127") = 0 [pid 5258] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5258] setpgid(0, 0) = 0 [pid 5258] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5258] write(3, "1000", 4) = 4 [pid 5258] close(3) = 0 [pid 5258] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5258] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5258] memfd_create("syzkaller", 0) = 4 [pid 5258] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5258] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5258] munmap(0x7f3f2898f000, 262144) = 0 [pid 5258] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.105987][ T5256] loop0: detected capacity change from 0 to 512 [ 52.114162][ T5256] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.128715][ T5256] EXT4-fs (loop0): 1 truncate cleaned up [pid 5258] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5258] close(4) = 0 [pid 5258] mkdir("./file1", 0777) = 0 [pid 5258] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5258] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5258] chdir("./file1") = 0 [pid 5258] ioctl(5, LOOP_CLR_FD) = 0 [pid 5258] close(5) = 0 [pid 5258] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5258] creat("./file1", 000) = 5 [pid 5258] exit_group(0) = ? [pid 5258] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5258, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./127", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./127", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./127/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./127/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./127/binderfs") = 0 umount2("./127/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./127/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./127/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./127/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./127/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./127/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./127") = 0 mkdir("./128", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5260 attached , child_tidptr=0x555556c935d0) = 5260 [pid 5260] chdir("./128") = 0 [pid 5260] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5260] setpgid(0, 0) = 0 [pid 5260] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5260] write(3, "1000", 4) = 4 [pid 5260] close(3) = 0 [pid 5260] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5260] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5260] memfd_create("syzkaller", 0) = 4 [pid 5260] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5260] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5260] munmap(0x7f3f2898f000, 262144) = 0 [pid 5260] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.160369][ T5258] loop0: detected capacity change from 0 to 512 [ 52.168207][ T5258] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.181376][ T5258] EXT4-fs (loop0): 1 truncate cleaned up [pid 5260] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5260] close(4) = 0 [pid 5260] mkdir("./file1", 0777) = 0 [pid 5260] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5260] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5260] chdir("./file1") = 0 [pid 5260] ioctl(5, LOOP_CLR_FD) = 0 [pid 5260] close(5) = 0 [pid 5260] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5260] creat("./file1", 000) = 5 [pid 5260] exit_group(0) = ? [pid 5260] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5260, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./128", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./128", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./128/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./128/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./128/binderfs") = 0 umount2("./128/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./128/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./128/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./128/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./128/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./128/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./128") = 0 mkdir("./129", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5262 ./strace-static-x86_64: Process 5262 attached [pid 5262] chdir("./129") = 0 [pid 5262] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5262] setpgid(0, 0) = 0 [pid 5262] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5262] write(3, "1000", 4) = 4 [pid 5262] close(3) = 0 [pid 5262] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5262] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5262] memfd_create("syzkaller", 0) = 4 [pid 5262] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5262] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5262] munmap(0x7f3f2898f000, 262144) = 0 [pid 5262] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.221592][ T5260] loop0: detected capacity change from 0 to 512 [ 52.229918][ T5260] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.243646][ T5260] EXT4-fs (loop0): 1 truncate cleaned up [pid 5262] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5262] close(4) = 0 [pid 5262] mkdir("./file1", 0777) = 0 [pid 5262] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5262] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5262] chdir("./file1") = 0 [pid 5262] ioctl(5, LOOP_CLR_FD) = 0 [pid 5262] close(5) = 0 [pid 5262] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5262] creat("./file1", 000) = 5 [pid 5262] exit_group(0) = ? [pid 5262] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5262, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./129", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./129", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./129/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./129/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./129/binderfs") = 0 umount2("./129/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./129/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./129/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./129/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./129/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./129/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./129") = 0 mkdir("./130", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5264 ./strace-static-x86_64: Process 5264 attached [pid 5264] chdir("./130") = 0 [pid 5264] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5264] setpgid(0, 0) = 0 [pid 5264] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5264] write(3, "1000", 4) = 4 [pid 5264] close(3) = 0 [pid 5264] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5264] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5264] memfd_create("syzkaller", 0) = 4 [pid 5264] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5264] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5264] munmap(0x7f3f2898f000, 262144) = 0 [pid 5264] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.287003][ T5262] loop0: detected capacity change from 0 to 512 [ 52.294989][ T5262] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.308438][ T5262] EXT4-fs (loop0): 1 truncate cleaned up [pid 5264] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5264] close(4) = 0 [pid 5264] mkdir("./file1", 0777) = 0 [pid 5264] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5264] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5264] chdir("./file1") = 0 [pid 5264] ioctl(5, LOOP_CLR_FD) = 0 [pid 5264] close(5) = 0 [pid 5264] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5264] creat("./file1", 000) = 5 [pid 5264] exit_group(0) = ? [pid 5264] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5264, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./130", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./130", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./130/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./130/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./130/binderfs") = 0 umount2("./130/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./130/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./130/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./130/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./130/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./130/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./130") = 0 mkdir("./131", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5266 ./strace-static-x86_64: Process 5266 attached [pid 5266] chdir("./131") = 0 [pid 5266] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5266] setpgid(0, 0) = 0 [pid 5266] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5266] write(3, "1000", 4) = 4 [pid 5266] close(3) = 0 [pid 5266] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5266] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5266] memfd_create("syzkaller", 0) = 4 [pid 5266] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5266] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5266] munmap(0x7f3f2898f000, 262144) = 0 [pid 5266] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.342272][ T5264] loop0: detected capacity change from 0 to 512 [ 52.350553][ T5264] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.364272][ T5264] EXT4-fs (loop0): 1 truncate cleaned up [pid 5266] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5266] close(4) = 0 [pid 5266] mkdir("./file1", 0777) = 0 [pid 5266] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5266] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5266] chdir("./file1") = 0 [pid 5266] ioctl(5, LOOP_CLR_FD) = 0 [pid 5266] close(5) = 0 [pid 5266] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5266] creat("./file1", 000) = 5 [pid 5266] exit_group(0) = ? [pid 5266] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5266, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./131", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./131", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./131/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./131/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./131/binderfs") = 0 umount2("./131/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./131/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./131/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./131/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./131/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./131/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./131") = 0 mkdir("./132", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5268 ./strace-static-x86_64: Process 5268 attached [pid 5268] chdir("./132") = 0 [pid 5268] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5268] setpgid(0, 0) = 0 [pid 5268] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5268] write(3, "1000", 4) = 4 [pid 5268] close(3) = 0 [pid 5268] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5268] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5268] memfd_create("syzkaller", 0) = 4 [pid 5268] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [ 52.393755][ T5266] loop0: detected capacity change from 0 to 512 [ 52.401587][ T5266] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.415412][ T5266] EXT4-fs (loop0): 1 truncate cleaned up [pid 5268] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5268] munmap(0x7f3f2898f000, 262144) = 0 [pid 5268] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5268] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5268] close(4) = 0 [pid 5268] mkdir("./file1", 0777) = 0 [pid 5268] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5268] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5268] chdir("./file1") = 0 [pid 5268] ioctl(5, LOOP_CLR_FD) = 0 [pid 5268] close(5) = 0 [pid 5268] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5268] creat("./file1", 000) = 5 [pid 5268] exit_group(0) = ? [pid 5268] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5268, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./132", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./132", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./132/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./132/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./132/binderfs") = 0 umount2("./132/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./132/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./132/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./132/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./132/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./132/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./132") = 0 mkdir("./133", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5270 attached , child_tidptr=0x555556c935d0) = 5270 [pid 5270] chdir("./133") = 0 [pid 5270] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5270] setpgid(0, 0) = 0 [pid 5270] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5270] write(3, "1000", 4) = 4 [pid 5270] close(3) = 0 [pid 5270] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5270] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5270] memfd_create("syzkaller", 0) = 4 [pid 5270] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5270] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5270] munmap(0x7f3f2898f000, 262144) = 0 [pid 5270] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.445606][ T5268] loop0: detected capacity change from 0 to 512 [ 52.453303][ T5268] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.466955][ T5268] EXT4-fs (loop0): 1 truncate cleaned up [pid 5270] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5270] close(4) = 0 [pid 5270] mkdir("./file1", 0777) = 0 [pid 5270] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5270] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5270] chdir("./file1") = 0 [pid 5270] ioctl(5, LOOP_CLR_FD) = 0 [pid 5270] close(5) = 0 [pid 5270] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5270] creat("./file1", 000) = 5 [pid 5270] exit_group(0) = ? [pid 5270] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5270, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./133", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./133", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./133/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./133/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./133/binderfs") = 0 umount2("./133/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./133/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./133/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./133/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./133/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./133/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./133") = 0 mkdir("./134", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5272 ./strace-static-x86_64: Process 5272 attached [pid 5272] chdir("./134") = 0 [pid 5272] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5272] setpgid(0, 0) = 0 [pid 5272] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5272] write(3, "1000", 4) = 4 [pid 5272] close(3) = 0 [pid 5272] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5272] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5272] memfd_create("syzkaller", 0) = 4 [pid 5272] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5272] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5272] munmap(0x7f3f2898f000, 262144) = 0 [pid 5272] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.502454][ T5270] loop0: detected capacity change from 0 to 512 [ 52.510543][ T5270] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.523713][ T5270] EXT4-fs (loop0): 1 truncate cleaned up [pid 5272] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5272] close(4) = 0 [pid 5272] mkdir("./file1", 0777) = 0 [pid 5272] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5272] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5272] chdir("./file1") = 0 [pid 5272] ioctl(5, LOOP_CLR_FD) = 0 [pid 5272] close(5) = 0 [pid 5272] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5272] creat("./file1", 000) = 5 [pid 5272] exit_group(0) = ? [pid 5272] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5272, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./134", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./134", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./134/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./134/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./134/binderfs") = 0 umount2("./134/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./134/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./134/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./134/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./134/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./134/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./134") = 0 mkdir("./135", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5274 ./strace-static-x86_64: Process 5274 attached [pid 5274] chdir("./135") = 0 [pid 5274] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5274] setpgid(0, 0) = 0 [pid 5274] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5274] write(3, "1000", 4) = 4 [pid 5274] close(3) = 0 [pid 5274] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5274] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5274] memfd_create("syzkaller", 0) = 4 [pid 5274] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5274] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5274] munmap(0x7f3f2898f000, 262144) = 0 [pid 5274] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.564694][ T5272] loop0: detected capacity change from 0 to 512 [ 52.572905][ T5272] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.586483][ T5272] EXT4-fs (loop0): 1 truncate cleaned up [pid 5274] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5274] close(4) = 0 [pid 5274] mkdir("./file1", 0777) = 0 [pid 5274] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5274] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5274] chdir("./file1") = 0 [pid 5274] ioctl(5, LOOP_CLR_FD) = 0 [pid 5274] close(5) = 0 [pid 5274] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5274] creat("./file1", 000) = 5 [pid 5274] exit_group(0) = ? [pid 5274] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5274, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./135", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./135", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./135/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./135/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./135/binderfs") = 0 umount2("./135/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./135/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./135/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./135/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./135/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./135/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./135") = 0 mkdir("./136", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5276 ./strace-static-x86_64: Process 5276 attached [pid 5276] chdir("./136") = 0 [pid 5276] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5276] setpgid(0, 0) = 0 [pid 5276] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5276] write(3, "1000", 4) = 4 [pid 5276] close(3) = 0 [pid 5276] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5276] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5276] memfd_create("syzkaller", 0) = 4 [pid 5276] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5276] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5276] munmap(0x7f3f2898f000, 262144) = 0 [pid 5276] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.624059][ T5274] loop0: detected capacity change from 0 to 512 [ 52.632350][ T5274] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.646870][ T5274] EXT4-fs (loop0): 1 truncate cleaned up [pid 5276] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5276] close(4) = 0 [pid 5276] mkdir("./file1", 0777) = 0 [pid 5276] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5276] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5276] chdir("./file1") = 0 [pid 5276] ioctl(5, LOOP_CLR_FD) = 0 [pid 5276] close(5) = 0 [pid 5276] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5276] creat("./file1", 000) = 5 [pid 5276] exit_group(0) = ? [pid 5276] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5276, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./136", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./136", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./136/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./136/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./136/binderfs") = 0 umount2("./136/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./136/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./136/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./136/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./136/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./136/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./136") = 0 mkdir("./137", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5278 ./strace-static-x86_64: Process 5278 attached [pid 5278] chdir("./137") = 0 [pid 5278] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5278] setpgid(0, 0) = 0 [pid 5278] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5278] write(3, "1000", 4) = 4 [pid 5278] close(3) = 0 [pid 5278] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5278] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5278] memfd_create("syzkaller", 0) = 4 [pid 5278] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5278] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5278] munmap(0x7f3f2898f000, 262144) = 0 [pid 5278] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.680480][ T5276] loop0: detected capacity change from 0 to 512 [ 52.688191][ T5276] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.702379][ T5276] EXT4-fs (loop0): 1 truncate cleaned up [pid 5278] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5278] close(4) = 0 [pid 5278] mkdir("./file1", 0777) = 0 [pid 5278] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5278] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5278] chdir("./file1") = 0 [pid 5278] ioctl(5, LOOP_CLR_FD) = 0 [pid 5278] close(5) = 0 [pid 5278] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5278] creat("./file1", 000) = 5 [pid 5278] exit_group(0) = ? [pid 5278] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5278, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./137", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./137", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./137/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./137/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./137/binderfs") = 0 umount2("./137/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./137/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./137/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./137/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./137/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./137/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./137") = 0 mkdir("./138", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5280 ./strace-static-x86_64: Process 5280 attached [pid 5280] chdir("./138") = 0 [pid 5280] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5280] setpgid(0, 0) = 0 [pid 5280] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5280] write(3, "1000", 4) = 4 [pid 5280] close(3) = 0 [pid 5280] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5280] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5280] memfd_create("syzkaller", 0) = 4 [pid 5280] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5280] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5280] munmap(0x7f3f2898f000, 262144) = 0 [pid 5280] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.738480][ T5278] loop0: detected capacity change from 0 to 512 [ 52.747353][ T5278] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.761041][ T5278] EXT4-fs (loop0): 1 truncate cleaned up [pid 5280] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5280] close(4) = 0 [pid 5280] mkdir("./file1", 0777) = 0 [pid 5280] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5280] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5280] chdir("./file1") = 0 [pid 5280] ioctl(5, LOOP_CLR_FD) = 0 [pid 5280] close(5) = 0 [pid 5280] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5280] creat("./file1", 000) = 5 [pid 5280] exit_group(0) = ? [pid 5280] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5280, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./138", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./138", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./138/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./138/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./138/binderfs") = 0 umount2("./138/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./138/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./138/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./138/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./138/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 [ 52.800267][ T5280] loop0: detected capacity change from 0 to 512 [ 52.808846][ T5280] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.822418][ T5280] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./138/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./138") = 0 mkdir("./139", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5282 ./strace-static-x86_64: Process 5282 attached [pid 5282] chdir("./139") = 0 [pid 5282] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5282] setpgid(0, 0) = 0 [pid 5282] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5282] write(3, "1000", 4) = 4 [pid 5282] close(3) = 0 [pid 5282] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5282] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5282] memfd_create("syzkaller", 0) = 4 [pid 5282] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5282] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5282] munmap(0x7f3f2898f000, 262144) = 0 [pid 5282] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5282] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5282] close(4) = 0 [pid 5282] mkdir("./file1", 0777) = 0 [pid 5282] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5282] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5282] chdir("./file1") = 0 [pid 5282] ioctl(5, LOOP_CLR_FD) = 0 [pid 5282] close(5) = 0 [pid 5282] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5282] creat("./file1", 000) = 5 [pid 5282] exit_group(0) = ? [pid 5282] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5282, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./139", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./139", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./139/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./139/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./139/binderfs") = 0 umount2("./139/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./139/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./139/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./139/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./139/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./139/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./139") = 0 mkdir("./140", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5284 ./strace-static-x86_64: Process 5284 attached [pid 5284] chdir("./140") = 0 [pid 5284] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5284] setpgid(0, 0) = 0 [pid 5284] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5284] write(3, "1000", 4) = 4 [pid 5284] close(3) = 0 [pid 5284] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5284] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5284] memfd_create("syzkaller", 0) = 4 [pid 5284] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [ 52.855023][ T5282] loop0: detected capacity change from 0 to 512 [ 52.862840][ T5282] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.876282][ T5282] EXT4-fs (loop0): 1 truncate cleaned up [pid 5284] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5284] munmap(0x7f3f2898f000, 262144) = 0 [pid 5284] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5284] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5284] close(4) = 0 [pid 5284] mkdir("./file1", 0777) = 0 [pid 5284] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5284] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5284] chdir("./file1") = 0 [pid 5284] ioctl(5, LOOP_CLR_FD) = 0 [pid 5284] close(5) = 0 [pid 5284] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5284] creat("./file1", 000) = 5 [pid 5284] exit_group(0) = ? [pid 5284] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5284, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./140", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./140", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./140/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./140/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./140/binderfs") = 0 umount2("./140/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./140/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./140/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./140/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./140/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./140/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./140") = 0 mkdir("./141", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5286 ./strace-static-x86_64: Process 5286 attached [pid 5286] chdir("./141") = 0 [pid 5286] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5286] setpgid(0, 0) = 0 [pid 5286] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5286] write(3, "1000", 4) = 4 [pid 5286] close(3) = 0 [pid 5286] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5286] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5286] memfd_create("syzkaller", 0) = 4 [pid 5286] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5286] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5286] munmap(0x7f3f2898f000, 262144) = 0 [pid 5286] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.910006][ T5284] loop0: detected capacity change from 0 to 512 [ 52.919233][ T5284] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.932565][ T5284] EXT4-fs (loop0): 1 truncate cleaned up [pid 5286] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5286] close(4) = 0 [pid 5286] mkdir("./file1", 0777) = 0 [pid 5286] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5286] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5286] chdir("./file1") = 0 [pid 5286] ioctl(5, LOOP_CLR_FD) = 0 [pid 5286] close(5) = 0 [pid 5286] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5286] creat("./file1", 000) = 5 [pid 5286] exit_group(0) = ? [pid 5286] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5286, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./141", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./141", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./141/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./141/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./141/binderfs") = 0 umount2("./141/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./141/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./141/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./141/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./141/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./141/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./141") = 0 mkdir("./142", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5288 ./strace-static-x86_64: Process 5288 attached [pid 5288] chdir("./142") = 0 [pid 5288] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5288] setpgid(0, 0) = 0 [pid 5288] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5288] write(3, "1000", 4) = 4 [pid 5288] close(3) = 0 [pid 5288] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5288] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5288] memfd_create("syzkaller", 0) = 4 [pid 5288] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5288] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5288] munmap(0x7f3f2898f000, 262144) = 0 [pid 5288] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 52.975582][ T5286] loop0: detected capacity change from 0 to 512 [ 52.983720][ T5286] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 52.997251][ T5286] EXT4-fs (loop0): 1 truncate cleaned up [pid 5288] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5288] close(4) = 0 [pid 5288] mkdir("./file1", 0777) = 0 [pid 5288] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5288] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5288] chdir("./file1") = 0 [pid 5288] ioctl(5, LOOP_CLR_FD) = 0 [pid 5288] close(5) = 0 [pid 5288] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5288] creat("./file1", 000) = 5 [pid 5288] exit_group(0) = ? [pid 5288] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5288, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./142", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./142", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./142/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./142/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./142/binderfs") = 0 umount2("./142/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./142/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./142/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./142/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./142/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./142/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./142") = 0 mkdir("./143", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5290 ./strace-static-x86_64: Process 5290 attached [pid 5290] chdir("./143") = 0 [pid 5290] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5290] setpgid(0, 0) = 0 [pid 5290] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5290] write(3, "1000", 4) = 4 [pid 5290] close(3) = 0 [pid 5290] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5290] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5290] memfd_create("syzkaller", 0) = 4 [pid 5290] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5290] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5290] munmap(0x7f3f2898f000, 262144) = 0 [pid 5290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.031674][ T5288] loop0: detected capacity change from 0 to 512 [ 53.039874][ T5288] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.053119][ T5288] EXT4-fs (loop0): 1 truncate cleaned up [pid 5290] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5290] close(4) = 0 [pid 5290] mkdir("./file1", 0777) = 0 [pid 5290] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5290] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5290] chdir("./file1") = 0 [pid 5290] ioctl(5, LOOP_CLR_FD) = 0 [pid 5290] close(5) = 0 [pid 5290] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5290] creat("./file1", 000) = 5 [pid 5290] exit_group(0) = ? [pid 5290] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5290, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./143", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./143", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./143/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./143/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./143/binderfs") = 0 umount2("./143/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./143/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./143/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./143/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./143/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./143/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./143") = 0 mkdir("./144", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5292 ./strace-static-x86_64: Process 5292 attached [pid 5292] chdir("./144") = 0 [pid 5292] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5292] setpgid(0, 0) = 0 [pid 5292] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5292] write(3, "1000", 4) = 4 [pid 5292] close(3) = 0 [pid 5292] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5292] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5292] memfd_create("syzkaller", 0) = 4 [pid 5292] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5292] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5292] munmap(0x7f3f2898f000, 262144) = 0 [pid 5292] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.079793][ T5290] loop0: detected capacity change from 0 to 512 [ 53.087580][ T5290] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.100870][ T5290] EXT4-fs (loop0): 1 truncate cleaned up [pid 5292] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5292] close(4) = 0 [pid 5292] mkdir("./file1", 0777) = 0 [pid 5292] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5292] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5292] chdir("./file1") = 0 [pid 5292] ioctl(5, LOOP_CLR_FD) = 0 [pid 5292] close(5) = 0 [pid 5292] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5292] creat("./file1", 000) = 5 [pid 5292] exit_group(0) = ? [pid 5292] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5292, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./144", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./144", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./144/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./144/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./144/binderfs") = 0 umount2("./144/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./144/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./144/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./144/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./144/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./144/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./144") = 0 mkdir("./145", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5294 ./strace-static-x86_64: Process 5294 attached [pid 5294] chdir("./145") = 0 [pid 5294] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5294] setpgid(0, 0) = 0 [pid 5294] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5294] write(3, "1000", 4) = 4 [pid 5294] close(3) = 0 [pid 5294] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5294] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5294] memfd_create("syzkaller", 0) = 4 [pid 5294] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5294] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5294] munmap(0x7f3f2898f000, 262144) = 0 [pid 5294] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.130672][ T5292] loop0: detected capacity change from 0 to 512 [ 53.138380][ T5292] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.151665][ T5292] EXT4-fs (loop0): 1 truncate cleaned up [pid 5294] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5294] close(4) = 0 [pid 5294] mkdir("./file1", 0777) = 0 [pid 5294] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5294] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5294] chdir("./file1") = 0 [pid 5294] ioctl(5, LOOP_CLR_FD) = 0 [pid 5294] close(5) = 0 [pid 5294] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5294] creat("./file1", 000) = 5 [pid 5294] exit_group(0) = ? [pid 5294] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5294, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./145", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./145", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./145/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./145/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./145/binderfs") = 0 umount2("./145/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./145/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./145/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./145/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./145/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./145/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./145") = 0 mkdir("./146", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5296 ./strace-static-x86_64: Process 5296 attached [pid 5296] chdir("./146") = 0 [pid 5296] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5296] setpgid(0, 0) = 0 [pid 5296] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5296] write(3, "1000", 4) = 4 [pid 5296] close(3) = 0 [pid 5296] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5296] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5296] memfd_create("syzkaller", 0) = 4 [pid 5296] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5296] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5296] munmap(0x7f3f2898f000, 262144) = 0 [pid 5296] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.183445][ T5294] loop0: detected capacity change from 0 to 512 [ 53.191465][ T5294] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.205106][ T5294] EXT4-fs (loop0): 1 truncate cleaned up [pid 5296] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5296] close(4) = 0 [pid 5296] mkdir("./file1", 0777) = 0 [pid 5296] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5296] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5296] chdir("./file1") = 0 [pid 5296] ioctl(5, LOOP_CLR_FD) = 0 [pid 5296] close(5) = 0 [pid 5296] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5296] creat("./file1", 000) = 5 [pid 5296] exit_group(0) = ? [pid 5296] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5296, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./146", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./146", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./146/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./146/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./146/binderfs") = 0 umount2("./146/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./146/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./146/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./146/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./146/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./146/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./146") = 0 mkdir("./147", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5298 ./strace-static-x86_64: Process 5298 attached [pid 5298] chdir("./147") = 0 [pid 5298] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5298] setpgid(0, 0) = 0 [pid 5298] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5298] write(3, "1000", 4) = 4 [pid 5298] close(3) = 0 [pid 5298] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5298] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5298] memfd_create("syzkaller", 0) = 4 [pid 5298] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5298] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5298] munmap(0x7f3f2898f000, 262144) = 0 [pid 5298] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.242301][ T5296] loop0: detected capacity change from 0 to 512 [ 53.250613][ T5296] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.263669][ T5296] EXT4-fs (loop0): 1 truncate cleaned up [pid 5298] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5298] close(4) = 0 [pid 5298] mkdir("./file1", 0777) = 0 [pid 5298] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5298] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5298] chdir("./file1") = 0 [pid 5298] ioctl(5, LOOP_CLR_FD) = 0 [pid 5298] close(5) = 0 [pid 5298] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5298] creat("./file1", 000) = 5 [pid 5298] exit_group(0) = ? [pid 5298] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5298, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./147", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./147", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./147/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./147/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./147/binderfs") = 0 umount2("./147/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./147/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./147/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./147/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./147/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./147/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./147") = 0 mkdir("./148", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5300 ./strace-static-x86_64: Process 5300 attached [pid 5300] chdir("./148") = 0 [pid 5300] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5300] setpgid(0, 0) = 0 [pid 5300] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5300] write(3, "1000", 4) = 4 [pid 5300] close(3) = 0 [pid 5300] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5300] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5300] memfd_create("syzkaller", 0) = 4 [pid 5300] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5300] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5300] munmap(0x7f3f2898f000, 262144) = 0 [pid 5300] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.287652][ T5298] loop0: detected capacity change from 0 to 512 [ 53.295061][ T5298] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.308031][ T5298] EXT4-fs (loop0): 1 truncate cleaned up [pid 5300] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5300] close(4) = 0 [pid 5300] mkdir("./file1", 0777) = 0 [pid 5300] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5300] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5300] chdir("./file1") = 0 [pid 5300] ioctl(5, LOOP_CLR_FD) = 0 [pid 5300] close(5) = 0 [pid 5300] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5300] creat("./file1", 000) = 5 [pid 5300] exit_group(0) = ? [pid 5300] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5300, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./148", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./148", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./148/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./148/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./148/binderfs") = 0 umount2("./148/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./148/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./148/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./148/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./148/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./148/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./148") = 0 mkdir("./149", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5302 ./strace-static-x86_64: Process 5302 attached [pid 5302] chdir("./149") = 0 [pid 5302] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5302] setpgid(0, 0) = 0 [pid 5302] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5302] write(3, "1000", 4) = 4 [pid 5302] close(3) = 0 [pid 5302] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5302] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5302] memfd_create("syzkaller", 0) = 4 [pid 5302] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5302] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5302] munmap(0x7f3f2898f000, 262144) = 0 [pid 5302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.350188][ T5300] loop0: detected capacity change from 0 to 512 [ 53.358224][ T5300] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.371335][ T5300] EXT4-fs (loop0): 1 truncate cleaned up [pid 5302] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5302] close(4) = 0 [pid 5302] mkdir("./file1", 0777) = 0 [pid 5302] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5302] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5302] chdir("./file1") = 0 [pid 5302] ioctl(5, LOOP_CLR_FD) = 0 [pid 5302] close(5) = 0 [pid 5302] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5302] creat("./file1", 000) = 5 [pid 5302] exit_group(0) = ? [pid 5302] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5302, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./149", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./149", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./149/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./149/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./149/binderfs") = 0 umount2("./149/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./149/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./149/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./149/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./149/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./149/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./149") = 0 mkdir("./150", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5304 attached [pid 5304] chdir("./150") = 0 [pid 5304] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5304] setpgid(0, 0) = 0 [pid 5304] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5304 [pid 5304] <... openat resumed>) = 3 [pid 5304] write(3, "1000", 4) = 4 [pid 5304] close(3) = 0 [pid 5304] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5304] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5304] memfd_create("syzkaller", 0) = 4 [pid 5304] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5304] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5304] munmap(0x7f3f2898f000, 262144) = 0 [pid 5304] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.402645][ T5302] loop0: detected capacity change from 0 to 512 [ 53.410394][ T5302] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.423936][ T5302] EXT4-fs (loop0): 1 truncate cleaned up [pid 5304] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5304] close(4) = 0 [pid 5304] mkdir("./file1", 0777) = 0 [pid 5304] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5304] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5304] chdir("./file1") = 0 [pid 5304] ioctl(5, LOOP_CLR_FD) = 0 [pid 5304] close(5) = 0 [pid 5304] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5304] creat("./file1", 000) = 5 [pid 5304] exit_group(0) = ? [pid 5304] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5304, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./150", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./150", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./150/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./150/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./150/binderfs") = 0 umount2("./150/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./150/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./150/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./150/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./150/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./150/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./150") = 0 mkdir("./151", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5306 ./strace-static-x86_64: Process 5306 attached [pid 5306] chdir("./151") = 0 [pid 5306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5306] setpgid(0, 0) = 0 [pid 5306] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5306] write(3, "1000", 4) = 4 [pid 5306] close(3) = 0 [pid 5306] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5306] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5306] memfd_create("syzkaller", 0) = 4 [pid 5306] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5306] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5306] munmap(0x7f3f2898f000, 262144) = 0 [pid 5306] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.460869][ T5304] loop0: detected capacity change from 0 to 512 [ 53.468745][ T5304] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.482127][ T5304] EXT4-fs (loop0): 1 truncate cleaned up [pid 5306] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5306] close(4) = 0 [pid 5306] mkdir("./file1", 0777) = 0 [pid 5306] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5306] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5306] chdir("./file1") = 0 [pid 5306] ioctl(5, LOOP_CLR_FD) = 0 [pid 5306] close(5) = 0 [pid 5306] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5306] creat("./file1", 000) = 5 [pid 5306] exit_group(0) = ? [pid 5306] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5306, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./151", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./151", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./151/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./151/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./151/binderfs") = 0 umount2("./151/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./151/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./151/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./151/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./151/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./151/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./151") = 0 mkdir("./152", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5308 ./strace-static-x86_64: Process 5308 attached [pid 5308] chdir("./152") = 0 [pid 5308] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5308] setpgid(0, 0) = 0 [pid 5308] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5308] write(3, "1000", 4) = 4 [pid 5308] close(3) = 0 [pid 5308] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5308] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5308] memfd_create("syzkaller", 0) = 4 [pid 5308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5308] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5308] munmap(0x7f3f2898f000, 262144) = 0 [pid 5308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.527106][ T5306] loop0: detected capacity change from 0 to 512 [ 53.535420][ T5306] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.548806][ T5306] EXT4-fs (loop0): 1 truncate cleaned up [pid 5308] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5308] close(4) = 0 [pid 5308] mkdir("./file1", 0777) = 0 [pid 5308] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5308] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5308] chdir("./file1") = 0 [pid 5308] ioctl(5, LOOP_CLR_FD) = 0 [pid 5308] close(5) = 0 [pid 5308] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5308] creat("./file1", 000) = 5 [pid 5308] exit_group(0) = ? [pid 5308] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5308, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./152", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./152", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./152/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./152/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./152/binderfs") = 0 umount2("./152/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./152/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./152/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./152/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./152/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./152/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./152") = 0 mkdir("./153", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5310 ./strace-static-x86_64: Process 5310 attached [pid 5310] chdir("./153") = 0 [pid 5310] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5310] setpgid(0, 0) = 0 [pid 5310] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5310] write(3, "1000", 4) = 4 [pid 5310] close(3) = 0 [pid 5310] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5310] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5310] memfd_create("syzkaller", 0) = 4 [pid 5310] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5310] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5310] munmap(0x7f3f2898f000, 262144) = 0 [pid 5310] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.577286][ T5308] loop0: detected capacity change from 0 to 512 [ 53.585009][ T5308] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.598525][ T5308] EXT4-fs (loop0): 1 truncate cleaned up [pid 5310] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5310] close(4) = 0 [pid 5310] mkdir("./file1", 0777) = 0 [pid 5310] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5310] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5310] chdir("./file1") = 0 [pid 5310] ioctl(5, LOOP_CLR_FD) = 0 [pid 5310] close(5) = 0 [pid 5310] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5310] creat("./file1", 000) = 5 [pid 5310] exit_group(0) = ? [pid 5310] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5310, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./153", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./153", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./153/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./153/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./153/binderfs") = 0 umount2("./153/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./153/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./153/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./153/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./153/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./153/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./153") = 0 mkdir("./154", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5312 ./strace-static-x86_64: Process 5312 attached [pid 5312] chdir("./154") = 0 [pid 5312] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5312] setpgid(0, 0) = 0 [pid 5312] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5312] write(3, "1000", 4) = 4 [pid 5312] close(3) = 0 [pid 5312] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5312] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5312] memfd_create("syzkaller", 0) = 4 [pid 5312] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5312] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5312] munmap(0x7f3f2898f000, 262144) = 0 [pid 5312] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.638348][ T5310] loop0: detected capacity change from 0 to 512 [ 53.646069][ T5310] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.659029][ T5310] EXT4-fs (loop0): 1 truncate cleaned up [pid 5312] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5312] close(4) = 0 [pid 5312] mkdir("./file1", 0777) = 0 [pid 5312] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5312] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5312] chdir("./file1") = 0 [pid 5312] ioctl(5, LOOP_CLR_FD) = 0 [pid 5312] close(5) = 0 [pid 5312] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5312] creat("./file1", 000) = 5 [pid 5312] exit_group(0) = ? [pid 5312] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5312, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./154", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./154", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./154/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./154/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./154/binderfs") = 0 umount2("./154/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./154/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./154/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./154/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./154/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./154/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./154") = 0 mkdir("./155", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5314 attached , child_tidptr=0x555556c935d0) = 5314 [pid 5314] chdir("./155") = 0 [pid 5314] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5314] setpgid(0, 0) = 0 [pid 5314] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5314] write(3, "1000", 4) = 4 [pid 5314] close(3) = 0 [pid 5314] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5314] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5314] memfd_create("syzkaller", 0) = 4 [pid 5314] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5314] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5314] munmap(0x7f3f2898f000, 262144) = 0 [pid 5314] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.694030][ T5312] loop0: detected capacity change from 0 to 512 [ 53.701988][ T5312] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.715317][ T5312] EXT4-fs (loop0): 1 truncate cleaned up [pid 5314] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5314] close(4) = 0 [pid 5314] mkdir("./file1", 0777) = 0 [pid 5314] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5314] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5314] chdir("./file1") = 0 [pid 5314] ioctl(5, LOOP_CLR_FD) = 0 [pid 5314] close(5) = 0 [pid 5314] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5314] creat("./file1", 000) = 5 [pid 5314] exit_group(0) = ? [pid 5314] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5314, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./155", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./155", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./155/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./155/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./155/binderfs") = 0 umount2("./155/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./155/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./155/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./155/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./155/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./155/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./155") = 0 mkdir("./156", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5316 attached , child_tidptr=0x555556c935d0) = 5316 [pid 5316] chdir("./156") = 0 [pid 5316] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5316] setpgid(0, 0) = 0 [pid 5316] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5316] write(3, "1000", 4) = 4 [pid 5316] close(3) = 0 [pid 5316] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5316] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5316] memfd_create("syzkaller", 0) = 4 [pid 5316] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5316] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5316] munmap(0x7f3f2898f000, 262144) = 0 [pid 5316] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.759404][ T5314] loop0: detected capacity change from 0 to 512 [ 53.766972][ T5314] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.780107][ T5314] EXT4-fs (loop0): 1 truncate cleaned up [pid 5316] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5316] close(4) = 0 [pid 5316] mkdir("./file1", 0777) = 0 [pid 5316] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5316] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5316] chdir("./file1") = 0 [pid 5316] ioctl(5, LOOP_CLR_FD) = 0 [pid 5316] close(5) = 0 [pid 5316] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5316] creat("./file1", 000) = 5 [pid 5316] exit_group(0) = ? [pid 5316] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5316, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./156", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./156", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./156/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./156/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./156/binderfs") = 0 umount2("./156/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./156/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./156/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./156/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./156/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./156/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./156") = 0 mkdir("./157", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5318 attached [pid 5318] chdir("./157") = 0 [pid 5318] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5318] setpgid(0, 0) = 0 [pid 5318] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5318] write(3, "1000", 4) = 4 [pid 5318] close(3) = 0 [pid 5318] symlink("/dev/binderfs", "./binderfs") = 0 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5318 [pid 5318] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5318] memfd_create("syzkaller", 0) = 4 [pid 5318] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5318] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5318] munmap(0x7f3f2898f000, 262144) = 0 [ 53.815732][ T5316] loop0: detected capacity change from 0 to 512 [ 53.823886][ T5316] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.837096][ T5316] EXT4-fs (loop0): 1 truncate cleaned up [pid 5318] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5318] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5318] close(4) = 0 [pid 5318] mkdir("./file1", 0777) = 0 [pid 5318] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5318] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5318] chdir("./file1") = 0 [pid 5318] ioctl(5, LOOP_CLR_FD) = 0 [pid 5318] close(5) = 0 [pid 5318] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5318] creat("./file1", 000) = 5 [pid 5318] exit_group(0) = ? [pid 5318] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5318, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./157", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./157", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./157/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./157/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./157/binderfs") = 0 umount2("./157/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./157/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./157/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./157/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./157/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./157/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./157") = 0 mkdir("./158", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5320 attached , child_tidptr=0x555556c935d0) = 5320 [pid 5320] chdir("./158") = 0 [pid 5320] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5320] setpgid(0, 0) = 0 [pid 5320] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5320] write(3, "1000", 4) = 4 [pid 5320] close(3) = 0 [pid 5320] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5320] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5320] memfd_create("syzkaller", 0) = 4 [pid 5320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5320] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5320] munmap(0x7f3f2898f000, 262144) = 0 [pid 5320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.867650][ T5318] loop0: detected capacity change from 0 to 512 [ 53.875347][ T5318] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.888955][ T5318] EXT4-fs (loop0): 1 truncate cleaned up [pid 5320] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5320] close(4) = 0 [pid 5320] mkdir("./file1", 0777) = 0 [pid 5320] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5320] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5320] chdir("./file1") = 0 [pid 5320] ioctl(5, LOOP_CLR_FD) = 0 [pid 5320] close(5) = 0 [pid 5320] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5320] creat("./file1", 000) = 5 [pid 5320] exit_group(0) = ? [pid 5320] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5320, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./158", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./158", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./158/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./158/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./158/binderfs") = 0 umount2("./158/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./158/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./158/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./158/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./158/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./158/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./158") = 0 mkdir("./159", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5322 ./strace-static-x86_64: Process 5322 attached [pid 5322] chdir("./159") = 0 [pid 5322] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5322] setpgid(0, 0) = 0 [pid 5322] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5322] write(3, "1000", 4) = 4 [pid 5322] close(3) = 0 [pid 5322] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5322] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5322] memfd_create("syzkaller", 0) = 4 [pid 5322] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5322] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5322] munmap(0x7f3f2898f000, 262144) = 0 [pid 5322] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 53.936083][ T5320] loop0: detected capacity change from 0 to 512 [ 53.944407][ T5320] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.958226][ T5320] EXT4-fs (loop0): 1 truncate cleaned up [pid 5322] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5322] close(4) = 0 [pid 5322] mkdir("./file1", 0777) = 0 [pid 5322] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5322] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5322] chdir("./file1") = 0 [pid 5322] ioctl(5, LOOP_CLR_FD) = 0 [pid 5322] close(5) = 0 [pid 5322] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5322] creat("./file1", 000) = 5 [pid 5322] exit_group(0) = ? [pid 5322] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5322, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./159", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./159", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./159/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./159/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./159/binderfs") = 0 umount2("./159/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./159/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./159/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./159/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./159/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./159/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./159") = 0 mkdir("./160", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5324 ./strace-static-x86_64: Process 5324 attached [pid 5324] chdir("./160") = 0 [pid 5324] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5324] setpgid(0, 0) = 0 [pid 5324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5324] write(3, "1000", 4) = 4 [pid 5324] close(3) = 0 [pid 5324] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5324] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5324] memfd_create("syzkaller", 0) = 4 [pid 5324] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5324] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5324] munmap(0x7f3f2898f000, 262144) = 0 [pid 5324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.010980][ T5322] loop0: detected capacity change from 0 to 512 [ 54.019641][ T5322] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.034172][ T5322] EXT4-fs (loop0): 1 truncate cleaned up [pid 5324] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5324] close(4) = 0 [pid 5324] mkdir("./file1", 0777) = 0 [pid 5324] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5324] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5324] chdir("./file1") = 0 [pid 5324] ioctl(5, LOOP_CLR_FD) = 0 [pid 5324] close(5) = 0 [pid 5324] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5324] creat("./file1", 000) = 5 [pid 5324] exit_group(0) = ? [pid 5324] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5324, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./160", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./160", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./160/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./160/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./160/binderfs") = 0 umount2("./160/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./160/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./160/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./160/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./160/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./160/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./160") = 0 mkdir("./161", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5327 attached , child_tidptr=0x555556c935d0) = 5327 [pid 5327] chdir("./161") = 0 [pid 5327] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5327] setpgid(0, 0) = 0 [pid 5327] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5327] write(3, "1000", 4) = 4 [pid 5327] close(3) = 0 [pid 5327] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5327] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5327] memfd_create("syzkaller", 0) = 4 [pid 5327] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5327] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5327] munmap(0x7f3f2898f000, 262144) = 0 [pid 5327] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.083705][ T5324] loop0: detected capacity change from 0 to 512 [ 54.091587][ T5324] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.105450][ T5324] EXT4-fs (loop0): 1 truncate cleaned up [pid 5327] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5327] close(4) = 0 [pid 5327] mkdir("./file1", 0777) = 0 [pid 5327] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5327] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5327] chdir("./file1") = 0 [pid 5327] ioctl(5, LOOP_CLR_FD) = 0 [pid 5327] close(5) = 0 [pid 5327] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5327] creat("./file1", 000) = 5 [pid 5327] exit_group(0) = ? [pid 5327] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5327, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./161", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./161", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./161/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./161/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./161/binderfs") = 0 umount2("./161/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./161/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./161/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./161/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./161/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./161/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./161") = 0 mkdir("./162", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5329 ./strace-static-x86_64: Process 5329 attached [pid 5329] chdir("./162") = 0 [pid 5329] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5329] setpgid(0, 0) = 0 [pid 5329] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5329] write(3, "1000", 4) = 4 [pid 5329] close(3) = 0 [pid 5329] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5329] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5329] memfd_create("syzkaller", 0) = 4 [pid 5329] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5329] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5329] munmap(0x7f3f2898f000, 262144) = 0 [pid 5329] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.143979][ T5327] loop0: detected capacity change from 0 to 512 [ 54.152068][ T5327] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.165700][ T5327] EXT4-fs (loop0): 1 truncate cleaned up [pid 5329] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5329] close(4) = 0 [pid 5329] mkdir("./file1", 0777) = 0 [pid 5329] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5329] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5329] chdir("./file1") = 0 [pid 5329] ioctl(5, LOOP_CLR_FD) = 0 [pid 5329] close(5) = 0 [pid 5329] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5329] creat("./file1", 000) = 5 [pid 5329] exit_group(0) = ? [pid 5329] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5329, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./162", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./162", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./162/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./162/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./162/binderfs") = 0 umount2("./162/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./162/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./162/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./162/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./162/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./162/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./162") = 0 mkdir("./163", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5331 ./strace-static-x86_64: Process 5331 attached [pid 5331] chdir("./163") = 0 [pid 5331] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5331] setpgid(0, 0) = 0 [pid 5331] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5331] write(3, "1000", 4) = 4 [pid 5331] close(3) = 0 [pid 5331] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5331] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5331] memfd_create("syzkaller", 0) = 4 [pid 5331] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5331] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5331] munmap(0x7f3f2898f000, 262144) = 0 [pid 5331] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.199899][ T5329] loop0: detected capacity change from 0 to 512 [ 54.207812][ T5329] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.221221][ T5329] EXT4-fs (loop0): 1 truncate cleaned up [pid 5331] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5331] close(4) = 0 [pid 5331] mkdir("./file1", 0777) = 0 [pid 5331] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5331] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5331] chdir("./file1") = 0 [pid 5331] ioctl(5, LOOP_CLR_FD) = 0 [pid 5331] close(5) = 0 [pid 5331] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5331] creat("./file1", 000) = 5 [pid 5331] exit_group(0) = ? [pid 5331] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5331, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./163", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./163", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./163/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./163/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./163/binderfs") = 0 umount2("./163/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./163/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./163/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./163/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./163/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./163/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./163") = 0 mkdir("./164", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5333 ./strace-static-x86_64: Process 5333 attached [pid 5333] chdir("./164") = 0 [pid 5333] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5333] setpgid(0, 0) = 0 [pid 5333] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5333] write(3, "1000", 4) = 4 [pid 5333] close(3) = 0 [pid 5333] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5333] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5333] memfd_create("syzkaller", 0) = 4 [pid 5333] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5333] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5333] munmap(0x7f3f2898f000, 262144) = 0 [pid 5333] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.255858][ T5331] loop0: detected capacity change from 0 to 512 [ 54.263956][ T5331] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.277512][ T5331] EXT4-fs (loop0): 1 truncate cleaned up [pid 5333] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5333] close(4) = 0 [pid 5333] mkdir("./file1", 0777) = 0 [pid 5333] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5333] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5333] chdir("./file1") = 0 [pid 5333] ioctl(5, LOOP_CLR_FD) = 0 [pid 5333] close(5) = 0 [pid 5333] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5333] creat("./file1", 000) = 5 [pid 5333] exit_group(0) = ? [pid 5333] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5333, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./164", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./164", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./164/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./164/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./164/binderfs") = 0 umount2("./164/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./164/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./164/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./164/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./164/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./164/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./164") = 0 mkdir("./165", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5335 ./strace-static-x86_64: Process 5335 attached [pid 5335] chdir("./165") = 0 [pid 5335] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5335] setpgid(0, 0) = 0 [pid 5335] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5335] write(3, "1000", 4) = 4 [pid 5335] close(3) = 0 [pid 5335] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5335] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5335] memfd_create("syzkaller", 0) = 4 [pid 5335] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5335] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5335] munmap(0x7f3f2898f000, 262144) = 0 [ 54.305125][ T5333] loop0: detected capacity change from 0 to 512 [ 54.313277][ T5333] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.327363][ T5333] EXT4-fs (loop0): 1 truncate cleaned up [pid 5335] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5335] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5335] close(4) = 0 [pid 5335] mkdir("./file1", 0777) = 0 [pid 5335] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5335] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5335] chdir("./file1") = 0 [pid 5335] ioctl(5, LOOP_CLR_FD) = 0 [pid 5335] close(5) = 0 [pid 5335] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5335] creat("./file1", 000) = 5 [pid 5335] exit_group(0) = ? [pid 5335] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5335, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./165", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./165", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./165/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./165/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./165/binderfs") = 0 umount2("./165/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./165/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./165/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./165/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./165/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./165/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./165") = 0 mkdir("./166", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5337 ./strace-static-x86_64: Process 5337 attached [pid 5337] chdir("./166") = 0 [pid 5337] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5337] setpgid(0, 0) = 0 [pid 5337] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5337] write(3, "1000", 4) = 4 [pid 5337] close(3) = 0 [pid 5337] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5337] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5337] memfd_create("syzkaller", 0) = 4 [pid 5337] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5337] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5337] munmap(0x7f3f2898f000, 262144) = 0 [pid 5337] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.366412][ T5335] loop0: detected capacity change from 0 to 512 [ 54.376288][ T5335] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.389955][ T5335] EXT4-fs (loop0): 1 truncate cleaned up [pid 5337] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5337] close(4) = 0 [pid 5337] mkdir("./file1", 0777) = 0 [pid 5337] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5337] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5337] chdir("./file1") = 0 [pid 5337] ioctl(5, LOOP_CLR_FD) = 0 [pid 5337] close(5) = 0 [pid 5337] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5337] creat("./file1", 000) = 5 [pid 5337] exit_group(0) = ? [pid 5337] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5337, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./166", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./166", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./166/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./166/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./166/binderfs") = 0 umount2("./166/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./166/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./166/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./166/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./166/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./166/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./166") = 0 mkdir("./167", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5339 attached , child_tidptr=0x555556c935d0) = 5339 [pid 5339] chdir("./167") = 0 [pid 5339] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5339] setpgid(0, 0) = 0 [pid 5339] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5339] write(3, "1000", 4) = 4 [pid 5339] close(3) = 0 [pid 5339] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5339] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5339] memfd_create("syzkaller", 0) = 4 [pid 5339] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5339] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5339] munmap(0x7f3f2898f000, 262144) = 0 [pid 5339] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.419665][ T5337] loop0: detected capacity change from 0 to 512 [ 54.427574][ T5337] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.440802][ T5337] EXT4-fs (loop0): 1 truncate cleaned up [pid 5339] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5339] close(4) = 0 [pid 5339] mkdir("./file1", 0777) = 0 [pid 5339] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5339] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5339] chdir("./file1") = 0 [pid 5339] ioctl(5, LOOP_CLR_FD) = 0 [pid 5339] close(5) = 0 [pid 5339] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5339] creat("./file1", 000) = 5 [pid 5339] exit_group(0) = ? [pid 5339] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5339, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./167", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./167", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./167/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./167/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./167/binderfs") = 0 umount2("./167/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./167/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./167/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./167/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./167/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./167/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./167") = 0 mkdir("./168", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5341 attached , child_tidptr=0x555556c935d0) = 5341 [pid 5341] chdir("./168") = 0 [pid 5341] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5341] setpgid(0, 0) = 0 [pid 5341] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5341] write(3, "1000", 4) = 4 [pid 5341] close(3) = 0 [pid 5341] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5341] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5341] memfd_create("syzkaller", 0) = 4 [pid 5341] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5341] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5341] munmap(0x7f3f2898f000, 262144) = 0 [pid 5341] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.480905][ T5339] loop0: detected capacity change from 0 to 512 [ 54.488710][ T5339] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.502236][ T5339] EXT4-fs (loop0): 1 truncate cleaned up [pid 5341] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5341] close(4) = 0 [pid 5341] mkdir("./file1", 0777) = 0 [pid 5341] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5341] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5341] chdir("./file1") = 0 [pid 5341] ioctl(5, LOOP_CLR_FD) = 0 [pid 5341] close(5) = 0 [pid 5341] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5341] creat("./file1", 000) = 5 [pid 5341] exit_group(0) = ? [pid 5341] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5341, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./168", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./168", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./168/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./168/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./168/binderfs") = 0 umount2("./168/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./168/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./168/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./168/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./168/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./168/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./168") = 0 mkdir("./169", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5343 attached [pid 5343] chdir("./169" [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5343 [pid 5343] <... chdir resumed>) = 0 [pid 5343] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5343] setpgid(0, 0) = 0 [pid 5343] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5343] write(3, "1000", 4) = 4 [pid 5343] close(3) = 0 [pid 5343] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5343] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5343] memfd_create("syzkaller", 0) = 4 [pid 5343] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5343] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5343] munmap(0x7f3f2898f000, 262144) = 0 [pid 5343] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.534441][ T5341] loop0: detected capacity change from 0 to 512 [ 54.543922][ T5341] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.558011][ T5341] EXT4-fs (loop0): 1 truncate cleaned up [pid 5343] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5343] close(4) = 0 [pid 5343] mkdir("./file1", 0777) = 0 [pid 5343] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5343] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5343] chdir("./file1") = 0 [pid 5343] ioctl(5, LOOP_CLR_FD) = 0 [pid 5343] close(5) = 0 [pid 5343] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5343] creat("./file1", 000) = 5 [pid 5343] exit_group(0) = ? [pid 5343] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5343, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./169", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./169", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./169/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./169/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./169/binderfs") = 0 umount2("./169/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./169/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./169/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./169/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./169/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./169/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./169") = 0 mkdir("./170", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5345 attached [pid 5345] chdir("./170") = 0 [pid 5345] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5345] setpgid(0, 0) = 0 [pid 5345] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5345] write(3, "1000", 4) = 4 [pid 5345] close(3) = 0 [pid 5345] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5345] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5345] memfd_create("syzkaller", 0) = 4 [pid 5345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5345 [pid 5345] <... mmap resumed>) = 0x7f3f2898f000 [pid 5345] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5345] munmap(0x7f3f2898f000, 262144) = 0 [pid 5345] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.592542][ T5343] loop0: detected capacity change from 0 to 512 [ 54.600448][ T5343] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.613945][ T5343] EXT4-fs (loop0): 1 truncate cleaned up [pid 5345] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5345] close(4) = 0 [pid 5345] mkdir("./file1", 0777) = 0 [pid 5345] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5345] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5345] chdir("./file1") = 0 [pid 5345] ioctl(5, LOOP_CLR_FD) = 0 [pid 5345] close(5) = 0 [pid 5345] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5345] creat("./file1", 000) = 5 [pid 5345] exit_group(0) = ? [pid 5345] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5345, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./170", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./170", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./170/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./170/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./170/binderfs") = 0 umount2("./170/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./170/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./170/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./170/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./170/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./170/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./170") = 0 mkdir("./171", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5347 attached , child_tidptr=0x555556c935d0) = 5347 [pid 5347] chdir("./171") = 0 [pid 5347] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5347] setpgid(0, 0) = 0 [pid 5347] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5347] write(3, "1000", 4) = 4 [pid 5347] close(3) = 0 [pid 5347] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5347] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5347] memfd_create("syzkaller", 0) = 4 [pid 5347] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5347] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5347] munmap(0x7f3f2898f000, 262144) = 0 [pid 5347] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5347] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5347] close(4) = 0 [pid 5347] mkdir("./file1", 0777) = 0 [ 54.645949][ T5345] loop0: detected capacity change from 0 to 512 [ 54.653967][ T5345] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.667558][ T5345] EXT4-fs (loop0): 1 truncate cleaned up [pid 5347] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5347] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5347] chdir("./file1") = 0 [pid 5347] ioctl(5, LOOP_CLR_FD) = 0 [pid 5347] close(5) = 0 [pid 5347] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5347] creat("./file1", 000) = 5 [pid 5347] exit_group(0) = ? [pid 5347] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5347, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./171", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./171", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./171/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./171/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./171/binderfs") = 0 umount2("./171/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./171/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./171/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./171/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./171/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./171/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./171") = 0 mkdir("./172", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5349 attached , child_tidptr=0x555556c935d0) = 5349 [pid 5349] chdir("./172") = 0 [pid 5349] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5349] setpgid(0, 0) = 0 [pid 5349] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5349] write(3, "1000", 4) = 4 [pid 5349] close(3) = 0 [pid 5349] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5349] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5349] memfd_create("syzkaller", 0) = 4 [pid 5349] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5349] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5349] munmap(0x7f3f2898f000, 262144) = 0 [pid 5349] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.707806][ T5347] loop0: detected capacity change from 0 to 512 [ 54.715659][ T5347] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.729480][ T5347] EXT4-fs (loop0): 1 truncate cleaned up [pid 5349] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5349] close(4) = 0 [pid 5349] mkdir("./file1", 0777) = 0 [pid 5349] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5349] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5349] chdir("./file1") = 0 [pid 5349] ioctl(5, LOOP_CLR_FD) = 0 [pid 5349] close(5) = 0 [pid 5349] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5349] creat("./file1", 000) = 5 [pid 5349] exit_group(0) = ? [pid 5349] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5349, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./172", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./172", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./172/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./172/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./172/binderfs") = 0 umount2("./172/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./172/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./172/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./172/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./172/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./172/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./172") = 0 mkdir("./173", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5351 ./strace-static-x86_64: Process 5351 attached [pid 5351] chdir("./173") = 0 [pid 5351] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5351] setpgid(0, 0) = 0 [pid 5351] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5351] write(3, "1000", 4) = 4 [pid 5351] close(3) = 0 [pid 5351] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5351] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5351] memfd_create("syzkaller", 0) = 4 [pid 5351] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5351] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5351] munmap(0x7f3f2898f000, 262144) = 0 [pid 5351] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.766767][ T5349] loop0: detected capacity change from 0 to 512 [ 54.774610][ T5349] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.788387][ T5349] EXT4-fs (loop0): 1 truncate cleaned up [pid 5351] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5351] close(4) = 0 [pid 5351] mkdir("./file1", 0777) = 0 [pid 5351] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5351] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5351] chdir("./file1") = 0 [pid 5351] ioctl(5, LOOP_CLR_FD) = 0 [pid 5351] close(5) = 0 [pid 5351] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5351] creat("./file1", 000) = 5 [pid 5351] exit_group(0) = ? [pid 5351] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5351, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./173", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./173", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./173/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./173/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./173/binderfs") = 0 umount2("./173/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./173/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./173/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./173/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./173/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./173/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./173") = 0 mkdir("./174", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5353 ./strace-static-x86_64: Process 5353 attached [pid 5353] chdir("./174") = 0 [pid 5353] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5353] setpgid(0, 0) = 0 [pid 5353] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5353] write(3, "1000", 4) = 4 [pid 5353] close(3) = 0 [pid 5353] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5353] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5353] memfd_create("syzkaller", 0) = 4 [pid 5353] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5353] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5353] munmap(0x7f3f2898f000, 262144) = 0 [pid 5353] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.816466][ T5351] loop0: detected capacity change from 0 to 512 [ 54.824152][ T5351] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.837766][ T5351] EXT4-fs (loop0): 1 truncate cleaned up [pid 5353] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5353] close(4) = 0 [pid 5353] mkdir("./file1", 0777) = 0 [pid 5353] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5353] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5353] chdir("./file1") = 0 [pid 5353] ioctl(5, LOOP_CLR_FD) = 0 [pid 5353] close(5) = 0 [pid 5353] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5353] creat("./file1", 000) = 5 [pid 5353] exit_group(0) = ? [pid 5353] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5353, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./174", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./174", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./174/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./174/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./174/binderfs") = 0 umount2("./174/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./174/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./174/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./174/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./174/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./174/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./174") = 0 mkdir("./175", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5355 ./strace-static-x86_64: Process 5355 attached [pid 5355] chdir("./175") = 0 [pid 5355] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5355] setpgid(0, 0) = 0 [pid 5355] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5355] write(3, "1000", 4) = 4 [pid 5355] close(3) = 0 [pid 5355] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5355] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5355] memfd_create("syzkaller", 0) = 4 [pid 5355] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5355] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5355] munmap(0x7f3f2898f000, 262144) = 0 [pid 5355] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.875790][ T5353] loop0: detected capacity change from 0 to 512 [ 54.883994][ T5353] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.897345][ T5353] EXT4-fs (loop0): 1 truncate cleaned up [pid 5355] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5355] close(4) = 0 [pid 5355] mkdir("./file1", 0777) = 0 [pid 5355] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5355] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5355] chdir("./file1") = 0 [pid 5355] ioctl(5, LOOP_CLR_FD) = 0 [pid 5355] close(5) = 0 [pid 5355] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5355] creat("./file1", 000) = 5 [pid 5355] exit_group(0) = ? [pid 5355] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5355, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./175", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./175", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./175/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./175/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./175/binderfs") = 0 umount2("./175/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./175/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./175/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./175/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./175/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./175/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./175") = 0 mkdir("./176", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5357 ./strace-static-x86_64: Process 5357 attached [pid 5357] chdir("./176") = 0 [pid 5357] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5357] setpgid(0, 0) = 0 [pid 5357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5357] write(3, "1000", 4) = 4 [pid 5357] close(3) = 0 [pid 5357] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5357] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5357] memfd_create("syzkaller", 0) = 4 [pid 5357] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5357] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5357] munmap(0x7f3f2898f000, 262144) = 0 [pid 5357] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.930143][ T5355] loop0: detected capacity change from 0 to 512 [ 54.937899][ T5355] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 54.951854][ T5355] EXT4-fs (loop0): 1 truncate cleaned up [pid 5357] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5357] close(4) = 0 [pid 5357] mkdir("./file1", 0777) = 0 [pid 5357] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5357] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5357] chdir("./file1") = 0 [pid 5357] ioctl(5, LOOP_CLR_FD) = 0 [pid 5357] close(5) = 0 [pid 5357] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5357] creat("./file1", 000) = 5 [pid 5357] exit_group(0) = ? [pid 5357] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5357, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./176", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./176", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./176/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./176/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./176/binderfs") = 0 umount2("./176/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./176/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./176/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./176/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./176/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./176/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./176") = 0 mkdir("./177", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5359 attached , child_tidptr=0x555556c935d0) = 5359 [pid 5359] chdir("./177") = 0 [pid 5359] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5359] setpgid(0, 0) = 0 [pid 5359] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5359] write(3, "1000", 4) = 4 [pid 5359] close(3) = 0 [pid 5359] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5359] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5359] memfd_create("syzkaller", 0) = 4 [pid 5359] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5359] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5359] munmap(0x7f3f2898f000, 262144) = 0 [pid 5359] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 54.994916][ T5357] loop0: detected capacity change from 0 to 512 [ 55.002731][ T5357] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.015715][ T5357] EXT4-fs (loop0): 1 truncate cleaned up [pid 5359] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5359] close(4) = 0 [pid 5359] mkdir("./file1", 0777) = 0 [pid 5359] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5359] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5359] chdir("./file1") = 0 [pid 5359] ioctl(5, LOOP_CLR_FD) = 0 [pid 5359] close(5) = 0 [pid 5359] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5359] creat("./file1", 000) = 5 [pid 5359] exit_group(0) = ? [pid 5359] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5359, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./177", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./177", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./177/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./177/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./177/binderfs") = 0 umount2("./177/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./177/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./177/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./177/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./177/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./177/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./177") = 0 mkdir("./178", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5361 attached , child_tidptr=0x555556c935d0) = 5361 [pid 5361] chdir("./178") = 0 [pid 5361] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5361] setpgid(0, 0) = 0 [pid 5361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5361] write(3, "1000", 4) = 4 [pid 5361] close(3) = 0 [pid 5361] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5361] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5361] memfd_create("syzkaller", 0) = 4 [pid 5361] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5361] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5361] munmap(0x7f3f2898f000, 262144) = 0 [pid 5361] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.054130][ T5359] loop0: detected capacity change from 0 to 512 [ 55.063412][ T5359] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.077496][ T5359] EXT4-fs (loop0): 1 truncate cleaned up [pid 5361] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5361] close(4) = 0 [pid 5361] mkdir("./file1", 0777) = 0 [pid 5361] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5361] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5361] chdir("./file1") = 0 [pid 5361] ioctl(5, LOOP_CLR_FD) = 0 [pid 5361] close(5) = 0 [pid 5361] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5361] creat("./file1", 000) = 5 [pid 5361] exit_group(0) = ? [pid 5361] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5361, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./178", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./178", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./178/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./178/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./178/binderfs") = 0 umount2("./178/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./178/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./178/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./178/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./178/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./178/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./178") = 0 mkdir("./179", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5363 attached , child_tidptr=0x555556c935d0) = 5363 [pid 5363] chdir("./179") = 0 [pid 5363] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5363] setpgid(0, 0) = 0 [pid 5363] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5363] write(3, "1000", 4) = 4 [pid 5363] close(3) = 0 [pid 5363] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5363] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5363] memfd_create("syzkaller", 0) = 4 [pid 5363] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5363] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5363] munmap(0x7f3f2898f000, 262144) = 0 [pid 5363] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.116828][ T5361] loop0: detected capacity change from 0 to 512 [ 55.124988][ T5361] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.138494][ T5361] EXT4-fs (loop0): 1 truncate cleaned up [pid 5363] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5363] close(4) = 0 [pid 5363] mkdir("./file1", 0777) = 0 [pid 5363] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5363] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5363] chdir("./file1") = 0 [pid 5363] ioctl(5, LOOP_CLR_FD) = 0 [pid 5363] close(5) = 0 [pid 5363] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5363] creat("./file1", 000) = 5 [pid 5363] exit_group(0) = ? [pid 5363] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5363, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./179", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./179", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./179/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./179/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./179/binderfs") = 0 umount2("./179/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./179/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./179/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./179/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./179/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./179/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./179") = 0 mkdir("./180", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5365 ./strace-static-x86_64: Process 5365 attached [pid 5365] chdir("./180") = 0 [pid 5365] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5365] setpgid(0, 0) = 0 [pid 5365] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5365] write(3, "1000", 4) = 4 [pid 5365] close(3) = 0 [pid 5365] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5365] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5365] memfd_create("syzkaller", 0) = 4 [pid 5365] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5365] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5365] munmap(0x7f3f2898f000, 262144) = 0 [pid 5365] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.183124][ T5363] loop0: detected capacity change from 0 to 512 [ 55.201656][ T5363] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.214944][ T5363] EXT4-fs (loop0): 1 truncate cleaned up [pid 5365] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5365] close(4) = 0 [pid 5365] mkdir("./file1", 0777) = 0 [pid 5365] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5365] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5365] chdir("./file1") = 0 [pid 5365] ioctl(5, LOOP_CLR_FD) = 0 [pid 5365] close(5) = 0 [pid 5365] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5365] creat("./file1", 000) = 5 [pid 5365] exit_group(0) = ? [pid 5365] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5365, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./180", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./180", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./180/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./180/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./180/binderfs") = 0 umount2("./180/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./180/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./180/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./180/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./180/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./180/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./180") = 0 mkdir("./181", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5367 ./strace-static-x86_64: Process 5367 attached [pid 5367] chdir("./181") = 0 [pid 5367] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5367] setpgid(0, 0) = 0 [pid 5367] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5367] write(3, "1000", 4) = 4 [pid 5367] close(3) = 0 [pid 5367] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5367] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5367] memfd_create("syzkaller", 0) = 4 [pid 5367] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5367] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5367] munmap(0x7f3f2898f000, 262144) = 0 [pid 5367] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.242875][ T5365] loop0: detected capacity change from 0 to 512 [ 55.250723][ T5365] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.264346][ T5365] EXT4-fs (loop0): 1 truncate cleaned up [pid 5367] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5367] close(4) = 0 [pid 5367] mkdir("./file1", 0777) = 0 [pid 5367] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5367] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5367] chdir("./file1") = 0 [pid 5367] ioctl(5, LOOP_CLR_FD) = 0 [pid 5367] close(5) = 0 [pid 5367] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5367] creat("./file1", 000) = 5 [pid 5367] exit_group(0) = ? [pid 5367] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5367, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./181", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./181", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./181/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./181/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./181/binderfs") = 0 umount2("./181/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./181/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./181/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./181/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./181/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./181/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./181") = 0 mkdir("./182", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5369 ./strace-static-x86_64: Process 5369 attached [pid 5369] chdir("./182") = 0 [pid 5369] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5369] setpgid(0, 0) = 0 [pid 5369] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5369] write(3, "1000", 4) = 4 [pid 5369] close(3) = 0 [pid 5369] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5369] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5369] memfd_create("syzkaller", 0) = 4 [pid 5369] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5369] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5369] munmap(0x7f3f2898f000, 262144) = 0 [pid 5369] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.292786][ T5367] loop0: detected capacity change from 0 to 512 [ 55.301489][ T5367] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.314153][ T5367] EXT4-fs (loop0): 1 truncate cleaned up [pid 5369] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5369] close(4) = 0 [pid 5369] mkdir("./file1", 0777) = 0 [pid 5369] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5369] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5369] chdir("./file1") = 0 [pid 5369] ioctl(5, LOOP_CLR_FD) = 0 [pid 5369] close(5) = 0 [pid 5369] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5369] creat("./file1", 000) = 5 [pid 5369] exit_group(0) = ? [pid 5369] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5369, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./182", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./182", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./182/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./182/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./182/binderfs") = 0 umount2("./182/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./182/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./182/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./182/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./182/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./182/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./182") = 0 mkdir("./183", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5371 ./strace-static-x86_64: Process 5371 attached [pid 5371] chdir("./183") = 0 [pid 5371] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5371] setpgid(0, 0) = 0 [pid 5371] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5371] write(3, "1000", 4) = 4 [pid 5371] close(3) = 0 [pid 5371] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5371] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5371] memfd_create("syzkaller", 0) = 4 [pid 5371] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5371] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5371] munmap(0x7f3f2898f000, 262144) = 0 [pid 5371] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.346845][ T5369] loop0: detected capacity change from 0 to 512 [ 55.354716][ T5369] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.367918][ T5369] EXT4-fs (loop0): 1 truncate cleaned up [pid 5371] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5371] close(4) = 0 [pid 5371] mkdir("./file1", 0777) = 0 [pid 5371] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5371] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5371] chdir("./file1") = 0 [pid 5371] ioctl(5, LOOP_CLR_FD) = 0 [pid 5371] close(5) = 0 [pid 5371] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5371] creat("./file1", 000) = 5 [pid 5371] exit_group(0) = ? [pid 5371] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5371, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./183", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./183", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./183/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./183/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./183/binderfs") = 0 umount2("./183/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./183/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./183/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./183/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./183/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./183/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./183") = 0 mkdir("./184", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5373 ./strace-static-x86_64: Process 5373 attached [pid 5373] chdir("./184") = 0 [pid 5373] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5373] setpgid(0, 0) = 0 [pid 5373] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5373] write(3, "1000", 4) = 4 [pid 5373] close(3) = 0 [pid 5373] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5373] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5373] memfd_create("syzkaller", 0) = 4 [pid 5373] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5373] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5373] munmap(0x7f3f2898f000, 262144) = 0 [pid 5373] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.396919][ T5371] loop0: detected capacity change from 0 to 512 [ 55.405240][ T5371] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.418806][ T5371] EXT4-fs (loop0): 1 truncate cleaned up [pid 5373] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5373] close(4) = 0 [pid 5373] mkdir("./file1", 0777) = 0 [pid 5373] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5373] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5373] chdir("./file1") = 0 [pid 5373] ioctl(5, LOOP_CLR_FD) = 0 [pid 5373] close(5) = 0 [pid 5373] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5373] creat("./file1", 000) = 5 [pid 5373] exit_group(0) = ? [pid 5373] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5373, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./184", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./184", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./184/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./184/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./184/binderfs") = 0 umount2("./184/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./184/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./184/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./184/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./184/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./184/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./184") = 0 mkdir("./185", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5375 ./strace-static-x86_64: Process 5375 attached [pid 5375] chdir("./185") = 0 [pid 5375] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5375] setpgid(0, 0) = 0 [pid 5375] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5375] write(3, "1000", 4) = 4 [pid 5375] close(3) = 0 [pid 5375] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5375] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5375] memfd_create("syzkaller", 0) = 4 [pid 5375] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5375] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5375] munmap(0x7f3f2898f000, 262144) = 0 [pid 5375] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.463336][ T5373] loop0: detected capacity change from 0 to 512 [ 55.471723][ T5373] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.488217][ T5373] EXT4-fs (loop0): 1 truncate cleaned up [pid 5375] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5375] close(4) = 0 [pid 5375] mkdir("./file1", 0777) = 0 [pid 5375] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5375] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5375] chdir("./file1") = 0 [pid 5375] ioctl(5, LOOP_CLR_FD) = 0 [pid 5375] close(5) = 0 [pid 5375] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5375] creat("./file1", 000) = 5 [pid 5375] exit_group(0) = ? [pid 5375] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5375, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./185", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./185", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./185/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./185/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./185/binderfs") = 0 umount2("./185/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./185/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./185/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./185/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./185/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./185/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./185") = 0 mkdir("./186", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5377 ./strace-static-x86_64: Process 5377 attached [pid 5377] chdir("./186") = 0 [pid 5377] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5377] setpgid(0, 0) = 0 [pid 5377] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5377] write(3, "1000", 4) = 4 [pid 5377] close(3) = 0 [pid 5377] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5377] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5377] memfd_create("syzkaller", 0) = 4 [pid 5377] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5377] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5377] munmap(0x7f3f2898f000, 262144) = 0 [pid 5377] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.512401][ T5375] loop0: detected capacity change from 0 to 512 [ 55.520189][ T5375] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.533371][ T5375] EXT4-fs (loop0): 1 truncate cleaned up [pid 5377] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5377] close(4) = 0 [pid 5377] mkdir("./file1", 0777) = 0 [pid 5377] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5377] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5377] chdir("./file1") = 0 [pid 5377] ioctl(5, LOOP_CLR_FD) = 0 [pid 5377] close(5) = 0 [pid 5377] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5377] creat("./file1", 000) = 5 [pid 5377] exit_group(0) = ? [pid 5377] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5377, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./186", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./186", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./186/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./186/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./186/binderfs") = 0 umount2("./186/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./186/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./186/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./186/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./186/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./186/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./186") = 0 mkdir("./187", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5379 ./strace-static-x86_64: Process 5379 attached [pid 5379] chdir("./187") = 0 [pid 5379] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5379] setpgid(0, 0) = 0 [pid 5379] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5379] write(3, "1000", 4) = 4 [pid 5379] close(3) = 0 [pid 5379] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5379] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5379] memfd_create("syzkaller", 0) = 4 [pid 5379] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5379] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5379] munmap(0x7f3f2898f000, 262144) = 0 [pid 5379] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.564330][ T5377] loop0: detected capacity change from 0 to 512 [ 55.572227][ T5377] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.585910][ T5377] EXT4-fs (loop0): 1 truncate cleaned up [pid 5379] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5379] close(4) = 0 [pid 5379] mkdir("./file1", 0777) = 0 [pid 5379] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5379] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5379] chdir("./file1") = 0 [pid 5379] ioctl(5, LOOP_CLR_FD) = 0 [pid 5379] close(5) = 0 [pid 5379] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5379] creat("./file1", 000) = 5 [pid 5379] exit_group(0) = ? [pid 5379] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5379, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./187", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./187", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./187/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./187/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./187/binderfs") = 0 umount2("./187/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./187/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./187/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./187/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./187/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./187/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./187") = 0 mkdir("./188", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5381 ./strace-static-x86_64: Process 5381 attached [pid 5381] chdir("./188") = 0 [pid 5381] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5381] setpgid(0, 0) = 0 [pid 5381] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5381] write(3, "1000", 4) = 4 [pid 5381] close(3) = 0 [pid 5381] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5381] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5381] memfd_create("syzkaller", 0) = 4 [pid 5381] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5381] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5381] munmap(0x7f3f2898f000, 262144) = 0 [pid 5381] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.614896][ T5379] loop0: detected capacity change from 0 to 512 [ 55.623196][ T5379] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.637019][ T5379] EXT4-fs (loop0): 1 truncate cleaned up [pid 5381] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5381] close(4) = 0 [pid 5381] mkdir("./file1", 0777) = 0 [pid 5381] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5381] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5381] chdir("./file1") = 0 [pid 5381] ioctl(5, LOOP_CLR_FD) = 0 [pid 5381] close(5) = 0 [pid 5381] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5381] creat("./file1", 000) = 5 [pid 5381] exit_group(0) = ? [pid 5381] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5381, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./188", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./188", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./188/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./188/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./188/binderfs") = 0 umount2("./188/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./188/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./188/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./188/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./188/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./188/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./188") = 0 mkdir("./189", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5383 ./strace-static-x86_64: Process 5383 attached [pid 5383] chdir("./189") = 0 [pid 5383] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5383] setpgid(0, 0) = 0 [pid 5383] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5383] write(3, "1000", 4) = 4 [pid 5383] close(3) = 0 [pid 5383] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5383] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5383] memfd_create("syzkaller", 0) = 4 [pid 5383] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5383] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5383] munmap(0x7f3f2898f000, 262144) = 0 [pid 5383] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.668031][ T5381] loop0: detected capacity change from 0 to 512 [ 55.675939][ T5381] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.689264][ T5381] EXT4-fs (loop0): 1 truncate cleaned up [pid 5383] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5383] close(4) = 0 [pid 5383] mkdir("./file1", 0777) = 0 [pid 5383] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5383] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5383] chdir("./file1") = 0 [pid 5383] ioctl(5, LOOP_CLR_FD) = 0 [pid 5383] close(5) = 0 [pid 5383] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5383] creat("./file1", 000) = 5 [pid 5383] exit_group(0) = ? [pid 5383] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5383, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./189", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./189", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./189/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./189/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./189/binderfs") = 0 umount2("./189/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./189/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./189/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./189/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./189/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./189/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./189") = 0 mkdir("./190", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5385 ./strace-static-x86_64: Process 5385 attached [pid 5385] chdir("./190") = 0 [pid 5385] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5385] setpgid(0, 0) = 0 [pid 5385] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5385] write(3, "1000", 4) = 4 [pid 5385] close(3) = 0 [pid 5385] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5385] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5385] memfd_create("syzkaller", 0) = 4 [pid 5385] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5385] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5385] munmap(0x7f3f2898f000, 262144) = 0 [pid 5385] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.735806][ T5383] loop0: detected capacity change from 0 to 512 [ 55.744170][ T5383] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.757727][ T5383] EXT4-fs (loop0): 1 truncate cleaned up [pid 5385] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5385] close(4) = 0 [pid 5385] mkdir("./file1", 0777) = 0 [pid 5385] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5385] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5385] chdir("./file1") = 0 [pid 5385] ioctl(5, LOOP_CLR_FD) = 0 [pid 5385] close(5) = 0 [pid 5385] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5385] creat("./file1", 000) = 5 [pid 5385] exit_group(0) = ? [pid 5385] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5385, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./190", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./190", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./190/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./190/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./190/binderfs") = 0 umount2("./190/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./190/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./190/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./190/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./190/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./190/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./190") = 0 mkdir("./191", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5387 ./strace-static-x86_64: Process 5387 attached [pid 5387] chdir("./191") = 0 [pid 5387] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5387] setpgid(0, 0) = 0 [pid 5387] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5387] write(3, "1000", 4) = 4 [pid 5387] close(3) = 0 [pid 5387] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5387] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5387] memfd_create("syzkaller", 0) = 4 [pid 5387] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5387] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5387] munmap(0x7f3f2898f000, 262144) = 0 [pid 5387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.786217][ T5385] loop0: detected capacity change from 0 to 512 [ 55.794126][ T5385] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.807567][ T5385] EXT4-fs (loop0): 1 truncate cleaned up [pid 5387] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5387] close(4) = 0 [pid 5387] mkdir("./file1", 0777) = 0 [pid 5387] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5387] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5387] chdir("./file1") = 0 [pid 5387] ioctl(5, LOOP_CLR_FD) = 0 [pid 5387] close(5) = 0 [pid 5387] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5387] creat("./file1", 000) = 5 [pid 5387] exit_group(0) = ? [pid 5387] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5387, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./191", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./191", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./191/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./191/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./191/binderfs") = 0 umount2("./191/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./191/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./191/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./191/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./191/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./191/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./191") = 0 mkdir("./192", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5389 attached [pid 5389] chdir("./192") = 0 [pid 5389] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5389] setpgid(0, 0) = 0 [pid 5389] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5389] write(3, "1000", 4) = 4 [pid 5389] close(3) = 0 [pid 5389] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5389] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5389] memfd_create("syzkaller", 0) = 4 [pid 5389] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 4998] <... clone resumed>, child_tidptr=0x555556c935d0) = 5389 [pid 5389] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5389] munmap(0x7f3f2898f000, 262144) = 0 [pid 5389] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.844818][ T5387] loop0: detected capacity change from 0 to 512 [ 55.852915][ T5387] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.866751][ T5387] EXT4-fs (loop0): 1 truncate cleaned up [pid 5389] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5389] close(4) = 0 [pid 5389] mkdir("./file1", 0777) = 0 [pid 5389] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5389] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5389] chdir("./file1") = 0 [pid 5389] ioctl(5, LOOP_CLR_FD) = 0 [pid 5389] close(5) = 0 [pid 5389] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5389] creat("./file1", 000) = 5 [pid 5389] exit_group(0) = ? [pid 5389] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5389, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./192", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./192", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./192/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./192/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./192/binderfs") = 0 umount2("./192/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./192/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./192/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./192/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./192/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./192/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./192") = 0 mkdir("./193", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5391 ./strace-static-x86_64: Process 5391 attached [pid 5391] chdir("./193") = 0 [pid 5391] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5391] setpgid(0, 0) = 0 [pid 5391] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5391] write(3, "1000", 4) = 4 [pid 5391] close(3) = 0 [pid 5391] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5391] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5391] memfd_create("syzkaller", 0) = 4 [pid 5391] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5391] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5391] munmap(0x7f3f2898f000, 262144) = 0 [pid 5391] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.900730][ T5389] loop0: detected capacity change from 0 to 512 [ 55.908504][ T5389] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.921559][ T5389] EXT4-fs (loop0): 1 truncate cleaned up [pid 5391] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5391] close(4) = 0 [pid 5391] mkdir("./file1", 0777) = 0 [pid 5391] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5391] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5391] chdir("./file1") = 0 [pid 5391] ioctl(5, LOOP_CLR_FD) = 0 [pid 5391] close(5) = 0 [pid 5391] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5391] creat("./file1", 000) = 5 [pid 5391] exit_group(0) = ? [pid 5391] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5391, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./193", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./193", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./193/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./193/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./193/binderfs") = 0 umount2("./193/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./193/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./193/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./193/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./193/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./193/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./193") = 0 mkdir("./194", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5393 attached , child_tidptr=0x555556c935d0) = 5393 [pid 5393] chdir("./194") = 0 [pid 5393] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5393] setpgid(0, 0) = 0 [pid 5393] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5393] write(3, "1000", 4) = 4 [pid 5393] close(3) = 0 [pid 5393] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5393] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5393] memfd_create("syzkaller", 0) = 4 [pid 5393] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5393] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5393] munmap(0x7f3f2898f000, 262144) = 0 [pid 5393] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 55.962344][ T5391] loop0: detected capacity change from 0 to 512 [ 55.970477][ T5391] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 55.983801][ T5391] EXT4-fs (loop0): 1 truncate cleaned up [pid 5393] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5393] close(4) = 0 [pid 5393] mkdir("./file1", 0777) = 0 [pid 5393] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5393] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5393] chdir("./file1") = 0 [pid 5393] ioctl(5, LOOP_CLR_FD) = 0 [pid 5393] close(5) = 0 [pid 5393] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5393] creat("./file1", 000) = 5 [pid 5393] exit_group(0) = ? [pid 5393] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5393, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./194", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./194", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./194/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./194/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./194/binderfs") = 0 umount2("./194/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./194/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./194/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./194/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./194/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./194/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./194") = 0 mkdir("./195", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5395 ./strace-static-x86_64: Process 5395 attached [pid 5395] chdir("./195") = 0 [pid 5395] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5395] setpgid(0, 0) = 0 [pid 5395] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5395] write(3, "1000", 4) = 4 [pid 5395] close(3) = 0 [pid 5395] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5395] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5395] memfd_create("syzkaller", 0) = 4 [pid 5395] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5395] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5395] munmap(0x7f3f2898f000, 262144) = 0 [pid 5395] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.013110][ T5393] loop0: detected capacity change from 0 to 512 [ 56.021233][ T5393] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.034676][ T5393] EXT4-fs (loop0): 1 truncate cleaned up [pid 5395] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5395] close(4) = 0 [pid 5395] mkdir("./file1", 0777) = 0 [pid 5395] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5395] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5395] chdir("./file1") = 0 [pid 5395] ioctl(5, LOOP_CLR_FD) = 0 [pid 5395] close(5) = 0 [pid 5395] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5395] creat("./file1", 000) = 5 [pid 5395] exit_group(0) = ? [pid 5395] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5395, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./195", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./195", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./195/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./195/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./195/binderfs") = 0 umount2("./195/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./195/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./195/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./195/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./195/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./195/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./195") = 0 mkdir("./196", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5397 ./strace-static-x86_64: Process 5397 attached [pid 5397] chdir("./196") = 0 [pid 5397] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5397] setpgid(0, 0) = 0 [pid 5397] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5397] write(3, "1000", 4) = 4 [pid 5397] close(3) = 0 [pid 5397] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5397] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5397] memfd_create("syzkaller", 0) = 4 [pid 5397] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5397] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5397] munmap(0x7f3f2898f000, 262144) = 0 [pid 5397] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.074066][ T5395] loop0: detected capacity change from 0 to 512 [ 56.082443][ T5395] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.095959][ T5395] EXT4-fs (loop0): 1 truncate cleaned up [pid 5397] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5397] close(4) = 0 [pid 5397] mkdir("./file1", 0777) = 0 [pid 5397] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5397] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5397] chdir("./file1") = 0 [pid 5397] ioctl(5, LOOP_CLR_FD) = 0 [pid 5397] close(5) = 0 [pid 5397] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5397] creat("./file1", 000) = 5 [pid 5397] exit_group(0) = ? [pid 5397] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5397, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./196", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./196", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./196/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./196/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./196/binderfs") = 0 umount2("./196/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./196/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./196/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./196/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./196/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./196/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./196") = 0 mkdir("./197", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5399 ./strace-static-x86_64: Process 5399 attached [pid 5399] chdir("./197") = 0 [pid 5399] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5399] setpgid(0, 0) = 0 [pid 5399] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5399] write(3, "1000", 4) = 4 [pid 5399] close(3) = 0 [pid 5399] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5399] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5399] memfd_create("syzkaller", 0) = 4 [pid 5399] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5399] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5399] munmap(0x7f3f2898f000, 262144) = 0 [pid 5399] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.136663][ T5397] loop0: detected capacity change from 0 to 512 [ 56.144617][ T5397] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.158410][ T5397] EXT4-fs (loop0): 1 truncate cleaned up [pid 5399] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5399] close(4) = 0 [pid 5399] mkdir("./file1", 0777) = 0 [pid 5399] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5399] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5399] chdir("./file1") = 0 [pid 5399] ioctl(5, LOOP_CLR_FD) = 0 [pid 5399] close(5) = 0 [pid 5399] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5399] creat("./file1", 000) = 5 [pid 5399] exit_group(0) = ? [pid 5399] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5399, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./197", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./197", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./197/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./197/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./197/binderfs") = 0 umount2("./197/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./197/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./197/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./197/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./197/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./197/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./197") = 0 mkdir("./198", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5401 attached , child_tidptr=0x555556c935d0) = 5401 [pid 5401] chdir("./198") = 0 [pid 5401] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5401] setpgid(0, 0) = 0 [pid 5401] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5401] write(3, "1000", 4) = 4 [pid 5401] close(3) = 0 [pid 5401] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5401] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5401] memfd_create("syzkaller", 0) = 4 [pid 5401] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5401] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5401] munmap(0x7f3f2898f000, 262144) = 0 [pid 5401] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.193596][ T5399] loop0: detected capacity change from 0 to 512 [ 56.201153][ T5399] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.213922][ T5399] EXT4-fs (loop0): 1 truncate cleaned up [pid 5401] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5401] close(4) = 0 [pid 5401] mkdir("./file1", 0777) = 0 [pid 5401] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5401] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5401] chdir("./file1") = 0 [pid 5401] ioctl(5, LOOP_CLR_FD) = 0 [pid 5401] close(5) = 0 [pid 5401] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5401] creat("./file1", 000) = 5 [pid 5401] exit_group(0) = ? [pid 5401] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5401, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./198", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./198", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./198/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./198/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./198/binderfs") = 0 umount2("./198/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./198/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./198/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./198/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./198/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./198/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./198") = 0 mkdir("./199", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5403 ./strace-static-x86_64: Process 5403 attached [pid 5403] chdir("./199") = 0 [pid 5403] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5403] setpgid(0, 0) = 0 [pid 5403] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5403] write(3, "1000", 4) = 4 [pid 5403] close(3) = 0 [pid 5403] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5403] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5403] memfd_create("syzkaller", 0) = 4 [pid 5403] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5403] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5403] munmap(0x7f3f2898f000, 262144) = 0 [pid 5403] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.251763][ T5401] loop0: detected capacity change from 0 to 512 [ 56.259740][ T5401] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.272935][ T5401] EXT4-fs (loop0): 1 truncate cleaned up [pid 5403] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5403] close(4) = 0 [pid 5403] mkdir("./file1", 0777) = 0 [pid 5403] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5403] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5403] chdir("./file1") = 0 [pid 5403] ioctl(5, LOOP_CLR_FD) = 0 [pid 5403] close(5) = 0 [pid 5403] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5403] creat("./file1", 000) = 5 [pid 5403] exit_group(0) = ? [pid 5403] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5403, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./199", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./199", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./199/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./199/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./199/binderfs") = 0 umount2("./199/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./199/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./199/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./199/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./199/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./199/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./199") = 0 mkdir("./200", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5405 ./strace-static-x86_64: Process 5405 attached [pid 5405] chdir("./200") = 0 [pid 5405] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5405] setpgid(0, 0) = 0 [pid 5405] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5405] write(3, "1000", 4) = 4 [pid 5405] close(3) = 0 [pid 5405] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5405] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5405] memfd_create("syzkaller", 0) = 4 [pid 5405] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5405] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5405] munmap(0x7f3f2898f000, 262144) = 0 [pid 5405] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.299500][ T5403] loop0: detected capacity change from 0 to 512 [ 56.307306][ T5403] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.320724][ T5403] EXT4-fs (loop0): 1 truncate cleaned up [pid 5405] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5405] close(4) = 0 [pid 5405] mkdir("./file1", 0777) = 0 [pid 5405] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5405] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5405] chdir("./file1") = 0 [pid 5405] ioctl(5, LOOP_CLR_FD) = 0 [pid 5405] close(5) = 0 [pid 5405] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5405] creat("./file1", 000) = 5 [pid 5405] exit_group(0) = ? [pid 5405] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5405, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./200", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./200", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./200/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./200/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./200/binderfs") = 0 umount2("./200/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./200/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./200/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./200/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./200/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./200/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./200") = 0 mkdir("./201", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5407 ./strace-static-x86_64: Process 5407 attached [pid 5407] chdir("./201") = 0 [pid 5407] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5407] setpgid(0, 0) = 0 [pid 5407] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5407] write(3, "1000", 4) = 4 [pid 5407] close(3) = 0 [pid 5407] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5407] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5407] memfd_create("syzkaller", 0) = 4 [pid 5407] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5407] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5407] munmap(0x7f3f2898f000, 262144) = 0 [pid 5407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.355785][ T5405] loop0: detected capacity change from 0 to 512 [ 56.363978][ T5405] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.377725][ T5405] EXT4-fs (loop0): 1 truncate cleaned up [pid 5407] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5407] close(4) = 0 [pid 5407] mkdir("./file1", 0777) = 0 [pid 5407] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5407] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5407] chdir("./file1") = 0 [pid 5407] ioctl(5, LOOP_CLR_FD) = 0 [pid 5407] close(5) = 0 [pid 5407] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5407] creat("./file1", 000) = 5 [pid 5407] exit_group(0) = ? [pid 5407] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5407, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./201", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./201", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./201/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./201/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./201/binderfs") = 0 umount2("./201/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./201/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./201/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./201/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./201/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./201/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./201") = 0 mkdir("./202", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5409 ./strace-static-x86_64: Process 5409 attached [pid 5409] chdir("./202") = 0 [pid 5409] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5409] setpgid(0, 0) = 0 [pid 5409] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5409] write(3, "1000", 4) = 4 [pid 5409] close(3) = 0 [pid 5409] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5409] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5409] memfd_create("syzkaller", 0) = 4 [pid 5409] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5409] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5409] munmap(0x7f3f2898f000, 262144) = 0 [pid 5409] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.417127][ T5407] loop0: detected capacity change from 0 to 512 [ 56.425138][ T5407] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.438254][ T5407] EXT4-fs (loop0): 1 truncate cleaned up [pid 5409] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5409] close(4) = 0 [pid 5409] mkdir("./file1", 0777) = 0 [pid 5409] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5409] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5409] chdir("./file1") = 0 [pid 5409] ioctl(5, LOOP_CLR_FD) = 0 [pid 5409] close(5) = 0 [pid 5409] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5409] creat("./file1", 000) = 5 [pid 5409] exit_group(0) = ? [pid 5409] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5409, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./202", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./202", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./202/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./202/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./202/binderfs") = 0 umount2("./202/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./202/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./202/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./202/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./202/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./202/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./202") = 0 mkdir("./203", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5411 ./strace-static-x86_64: Process 5411 attached [pid 5411] chdir("./203") = 0 [pid 5411] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5411] setpgid(0, 0) = 0 [pid 5411] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5411] write(3, "1000", 4) = 4 [pid 5411] close(3) = 0 [pid 5411] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5411] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5411] memfd_create("syzkaller", 0) = 4 [pid 5411] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5411] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5411] munmap(0x7f3f2898f000, 262144) = 0 [pid 5411] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.475400][ T5409] loop0: detected capacity change from 0 to 512 [ 56.483215][ T5409] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.496914][ T5409] EXT4-fs (loop0): 1 truncate cleaned up [pid 5411] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5411] close(4) = 0 [pid 5411] mkdir("./file1", 0777) = 0 [pid 5411] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5411] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5411] chdir("./file1") = 0 [pid 5411] ioctl(5, LOOP_CLR_FD) = 0 [pid 5411] close(5) = 0 [pid 5411] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5411] creat("./file1", 000) = 5 [pid 5411] exit_group(0) = ? [pid 5411] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5411, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./203", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./203", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./203/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./203/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./203/binderfs") = 0 umount2("./203/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./203/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./203/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./203/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./203/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./203/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./203") = 0 mkdir("./204", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5413 ./strace-static-x86_64: Process 5413 attached [pid 5413] chdir("./204") = 0 [pid 5413] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5413] setpgid(0, 0) = 0 [pid 5413] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5413] write(3, "1000", 4) = 4 [pid 5413] close(3) = 0 [pid 5413] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5413] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5413] memfd_create("syzkaller", 0) = 4 [pid 5413] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5413] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5413] munmap(0x7f3f2898f000, 262144) = 0 [pid 5413] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.527851][ T5411] loop0: detected capacity change from 0 to 512 [ 56.535567][ T5411] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.549146][ T5411] EXT4-fs (loop0): 1 truncate cleaned up [pid 5413] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5413] close(4) = 0 [pid 5413] mkdir("./file1", 0777) = 0 [pid 5413] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5413] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5413] chdir("./file1") = 0 [pid 5413] ioctl(5, LOOP_CLR_FD) = 0 [pid 5413] close(5) = 0 [pid 5413] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5413] creat("./file1", 000) = 5 [pid 5413] exit_group(0) = ? [pid 5413] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5413, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./204", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./204", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./204/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./204/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./204/binderfs") = 0 umount2("./204/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./204/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./204/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./204/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./204/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./204/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./204") = 0 mkdir("./205", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5415 ./strace-static-x86_64: Process 5415 attached [pid 5415] chdir("./205") = 0 [pid 5415] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5415] setpgid(0, 0) = 0 [pid 5415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5415] write(3, "1000", 4) = 4 [pid 5415] close(3) = 0 [pid 5415] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5415] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5415] memfd_create("syzkaller", 0) = 4 [pid 5415] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5415] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5415] munmap(0x7f3f2898f000, 262144) = 0 [pid 5415] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.580936][ T5413] loop0: detected capacity change from 0 to 512 [ 56.588969][ T5413] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.602008][ T5413] EXT4-fs (loop0): 1 truncate cleaned up [pid 5415] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5415] close(4) = 0 [pid 5415] mkdir("./file1", 0777) = 0 [pid 5415] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5415] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5415] chdir("./file1") = 0 [pid 5415] ioctl(5, LOOP_CLR_FD) = 0 [pid 5415] close(5) = 0 [pid 5415] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5415] creat("./file1", 000) = 5 [pid 5415] exit_group(0) = ? [pid 5415] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5415, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./205", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./205", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./205/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./205/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./205/binderfs") = 0 umount2("./205/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./205/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./205/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./205/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./205/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./205/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./205") = 0 mkdir("./206", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5417 ./strace-static-x86_64: Process 5417 attached [pid 5417] chdir("./206") = 0 [pid 5417] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5417] setpgid(0, 0) = 0 [pid 5417] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5417] write(3, "1000", 4) = 4 [pid 5417] close(3) = 0 [pid 5417] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5417] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5417] memfd_create("syzkaller", 0) = 4 [pid 5417] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5417] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5417] munmap(0x7f3f2898f000, 262144) = 0 [pid 5417] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.633610][ T5415] loop0: detected capacity change from 0 to 512 [ 56.642752][ T5415] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.656163][ T5415] EXT4-fs (loop0): 1 truncate cleaned up [pid 5417] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5417] close(4) = 0 [pid 5417] mkdir("./file1", 0777) = 0 [pid 5417] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5417] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5417] chdir("./file1") = 0 [pid 5417] ioctl(5, LOOP_CLR_FD) = 0 [pid 5417] close(5) = 0 [pid 5417] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5417] creat("./file1", 000) = 5 [pid 5417] exit_group(0) = ? [pid 5417] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5417, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./206", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./206", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./206/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./206/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./206/binderfs") = 0 umount2("./206/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./206/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./206/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./206/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./206/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./206/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./206") = 0 mkdir("./207", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5419 ./strace-static-x86_64: Process 5419 attached [pid 5419] chdir("./207") = 0 [pid 5419] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5419] setpgid(0, 0) = 0 [pid 5419] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5419] write(3, "1000", 4) = 4 [pid 5419] close(3) = 0 [pid 5419] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5419] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5419] memfd_create("syzkaller", 0) = 4 [pid 5419] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5419] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5419] munmap(0x7f3f2898f000, 262144) = 0 [pid 5419] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.684678][ T5417] loop0: detected capacity change from 0 to 512 [ 56.692615][ T5417] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.705781][ T5417] EXT4-fs (loop0): 1 truncate cleaned up [pid 5419] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5419] close(4) = 0 [pid 5419] mkdir("./file1", 0777) = 0 [pid 5419] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5419] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5419] chdir("./file1") = 0 [pid 5419] ioctl(5, LOOP_CLR_FD) = 0 [pid 5419] close(5) = 0 [pid 5419] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5419] creat("./file1", 000) = 5 [pid 5419] exit_group(0) = ? [pid 5419] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5419, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./207", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./207", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./207/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./207/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./207/binderfs") = 0 umount2("./207/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./207/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./207/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./207/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./207/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./207/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./207") = 0 mkdir("./208", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5421 ./strace-static-x86_64: Process 5421 attached [pid 5421] chdir("./208") = 0 [pid 5421] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5421] setpgid(0, 0) = 0 [pid 5421] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5421] write(3, "1000", 4) = 4 [pid 5421] close(3) = 0 [pid 5421] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5421] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5421] memfd_create("syzkaller", 0) = 4 [pid 5421] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5421] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5421] munmap(0x7f3f2898f000, 262144) = 0 [pid 5421] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.739401][ T5419] loop0: detected capacity change from 0 to 512 [ 56.747205][ T5419] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.760887][ T5419] EXT4-fs (loop0): 1 truncate cleaned up [pid 5421] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5421] close(4) = 0 [pid 5421] mkdir("./file1", 0777) = 0 [pid 5421] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5421] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5421] chdir("./file1") = 0 [pid 5421] ioctl(5, LOOP_CLR_FD) = 0 [pid 5421] close(5) = 0 [pid 5421] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5421] creat("./file1", 000) = 5 [pid 5421] exit_group(0) = ? [pid 5421] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5421, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./208", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./208", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./208/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./208/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./208/binderfs") = 0 umount2("./208/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./208/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./208/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./208/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./208/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./208/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./208") = 0 mkdir("./209", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5423 ./strace-static-x86_64: Process 5423 attached [pid 5423] chdir("./209") = 0 [pid 5423] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5423] setpgid(0, 0) = 0 [pid 5423] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5423] write(3, "1000", 4) = 4 [pid 5423] close(3) = 0 [pid 5423] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5423] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5423] memfd_create("syzkaller", 0) = 4 [pid 5423] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5423] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5423] munmap(0x7f3f2898f000, 262144) = 0 [pid 5423] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.791316][ T5421] loop0: detected capacity change from 0 to 512 [ 56.799823][ T5421] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.812575][ T5421] EXT4-fs (loop0): 1 truncate cleaned up [pid 5423] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5423] close(4) = 0 [pid 5423] mkdir("./file1", 0777) = 0 [pid 5423] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5423] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5423] chdir("./file1") = 0 [pid 5423] ioctl(5, LOOP_CLR_FD) = 0 [pid 5423] close(5) = 0 [pid 5423] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5423] creat("./file1", 000) = 5 [pid 5423] exit_group(0) = ? [pid 5423] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5423, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./209", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./209", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./209/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./209/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./209/binderfs") = 0 umount2("./209/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./209/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./209/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./209/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./209/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./209/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./209") = 0 mkdir("./210", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5425 ./strace-static-x86_64: Process 5425 attached [pid 5425] chdir("./210") = 0 [pid 5425] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5425] setpgid(0, 0) = 0 [pid 5425] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5425] write(3, "1000", 4) = 4 [pid 5425] close(3) = 0 [pid 5425] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5425] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5425] memfd_create("syzkaller", 0) = 4 [pid 5425] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5425] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5425] munmap(0x7f3f2898f000, 262144) = 0 [pid 5425] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.841477][ T5423] loop0: detected capacity change from 0 to 512 [ 56.849615][ T5423] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.862755][ T5423] EXT4-fs (loop0): 1 truncate cleaned up [pid 5425] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5425] close(4) = 0 [pid 5425] mkdir("./file1", 0777) = 0 [pid 5425] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5425] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5425] chdir("./file1") = 0 [pid 5425] ioctl(5, LOOP_CLR_FD) = 0 [pid 5425] close(5) = 0 [pid 5425] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5425] creat("./file1", 000) = 5 [pid 5425] exit_group(0) = ? [pid 5425] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5425, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./210", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./210", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./210/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./210/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./210/binderfs") = 0 umount2("./210/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./210/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./210/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./210/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./210/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./210/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./210") = 0 mkdir("./211", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5427 ./strace-static-x86_64: Process 5427 attached [pid 5427] chdir("./211") = 0 [pid 5427] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5427] setpgid(0, 0) = 0 [pid 5427] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5427] write(3, "1000", 4) = 4 [pid 5427] close(3) = 0 [pid 5427] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5427] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5427] memfd_create("syzkaller", 0) = 4 [pid 5427] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5427] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5427] munmap(0x7f3f2898f000, 262144) = 0 [pid 5427] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.894698][ T5425] loop0: detected capacity change from 0 to 512 [ 56.903751][ T5425] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.916546][ T5425] EXT4-fs (loop0): 1 truncate cleaned up [pid 5427] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5427] close(4) = 0 [pid 5427] mkdir("./file1", 0777) = 0 [pid 5427] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5427] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5427] chdir("./file1") = 0 [pid 5427] ioctl(5, LOOP_CLR_FD) = 0 [pid 5427] close(5) = 0 [pid 5427] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5427] creat("./file1", 000) = 5 [pid 5427] exit_group(0) = ? [pid 5427] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5427, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./211", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./211", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./211/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./211/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./211/binderfs") = 0 umount2("./211/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./211/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./211/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./211/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./211/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./211/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./211") = 0 mkdir("./212", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5429 ./strace-static-x86_64: Process 5429 attached [pid 5429] chdir("./212") = 0 [pid 5429] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5429] setpgid(0, 0) = 0 [pid 5429] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5429] write(3, "1000", 4) = 4 [pid 5429] close(3) = 0 [pid 5429] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5429] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5429] memfd_create("syzkaller", 0) = 4 [pid 5429] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5429] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5429] munmap(0x7f3f2898f000, 262144) = 0 [pid 5429] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.947289][ T5427] loop0: detected capacity change from 0 to 512 [ 56.955276][ T5427] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 56.968527][ T5427] EXT4-fs (loop0): 1 truncate cleaned up [pid 5429] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5429] close(4) = 0 [pid 5429] mkdir("./file1", 0777) = 0 [pid 5429] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5429] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5429] chdir("./file1") = 0 [pid 5429] ioctl(5, LOOP_CLR_FD) = 0 [pid 5429] close(5) = 0 [pid 5429] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5429] creat("./file1", 000) = 5 [pid 5429] exit_group(0) = ? [pid 5429] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5429, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./212", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./212", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./212/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./212/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./212/binderfs") = 0 umount2("./212/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./212/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./212/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./212/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./212/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./212/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./212") = 0 mkdir("./213", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5431 ./strace-static-x86_64: Process 5431 attached [pid 5431] chdir("./213") = 0 [pid 5431] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5431] setpgid(0, 0) = 0 [pid 5431] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5431] write(3, "1000", 4) = 4 [pid 5431] close(3) = 0 [pid 5431] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5431] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5431] memfd_create("syzkaller", 0) = 4 [pid 5431] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5431] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5431] munmap(0x7f3f2898f000, 262144) = 0 [pid 5431] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 56.999524][ T5429] loop0: detected capacity change from 0 to 512 [ 57.007259][ T5429] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 57.021037][ T5429] EXT4-fs (loop0): 1 truncate cleaned up [pid 5431] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5431] close(4) = 0 [pid 5431] mkdir("./file1", 0777) = 0 [pid 5431] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5431] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5431] chdir("./file1") = 0 [pid 5431] ioctl(5, LOOP_CLR_FD) = 0 [pid 5431] close(5) = 0 [pid 5431] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5431] creat("./file1", 000) = 5 [pid 5431] exit_group(0) = ? [pid 5431] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5431, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./213", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./213", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./213/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./213/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./213/binderfs") = 0 umount2("./213/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./213/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./213/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./213/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./213/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./213/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./213") = 0 mkdir("./214", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5433 attached , child_tidptr=0x555556c935d0) = 5433 [pid 5433] chdir("./214") = 0 [pid 5433] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5433] setpgid(0, 0) = 0 [pid 5433] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5433] write(3, "1000", 4) = 4 [pid 5433] close(3) = 0 [pid 5433] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5433] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5433] memfd_create("syzkaller", 0) = 4 [pid 5433] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5433] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5433] munmap(0x7f3f2898f000, 262144) = 0 [pid 5433] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 57.052165][ T5431] loop0: detected capacity change from 0 to 512 [ 57.059880][ T5431] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 57.073455][ T5431] EXT4-fs (loop0): 1 truncate cleaned up [pid 5433] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5433] close(4) = 0 [pid 5433] mkdir("./file1", 0777) = 0 [pid 5433] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5433] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5433] chdir("./file1") = 0 [pid 5433] ioctl(5, LOOP_CLR_FD) = 0 [pid 5433] close(5) = 0 [pid 5433] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5433] creat("./file1", 000) = 5 [pid 5433] exit_group(0) = ? [pid 5433] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5433, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- umount2("./214", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./214", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./214/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./214/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./214/binderfs") = 0 umount2("./214/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./214/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./214/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./214/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./214/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./214/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./214") = 0 mkdir("./215", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5435 attached , child_tidptr=0x555556c935d0) = 5435 [pid 5435] chdir("./215") = 0 [pid 5435] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5435] setpgid(0, 0) = 0 [pid 5435] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5435] write(3, "1000", 4) = 4 [pid 5435] close(3) = 0 [pid 5435] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5435] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5435] memfd_create("syzkaller", 0) = 4 [pid 5435] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5435] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5435] munmap(0x7f3f2898f000, 262144) = 0 [pid 5435] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 57.117365][ T5433] loop0: detected capacity change from 0 to 512 [ 57.125689][ T5433] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 57.138912][ T5433] EXT4-fs (loop0): 1 truncate cleaned up [pid 5435] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5435] close(4) = 0 [pid 5435] mkdir("./file1", 0777) = 0 [pid 5435] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5435] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5435] chdir("./file1") = 0 [pid 5435] ioctl(5, LOOP_CLR_FD) = 0 [pid 5435] close(5) = 0 [pid 5435] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5435] creat("./file1", 000) = 5 [pid 5435] exit_group(0) = ? [pid 5435] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5435, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./215", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./215", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./215/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./215/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./215/binderfs") = 0 umount2("./215/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./215/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./215/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./215/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./215/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./215/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./215") = 0 mkdir("./216", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5437 ./strace-static-x86_64: Process 5437 attached [pid 5437] chdir("./216") = 0 [pid 5437] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5437] setpgid(0, 0) = 0 [pid 5437] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5437] write(3, "1000", 4) = 4 [pid 5437] close(3) = 0 [pid 5437] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5437] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5437] memfd_create("syzkaller", 0) = 4 [pid 5437] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5437] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5437] munmap(0x7f3f2898f000, 262144) = 0 [pid 5437] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 57.182638][ T5435] loop0: detected capacity change from 0 to 512 [ 57.190341][ T5435] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 57.203649][ T5435] EXT4-fs (loop0): 1 truncate cleaned up [pid 5437] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5437] close(4) = 0 [pid 5437] mkdir("./file1", 0777) = 0 [pid 5437] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5437] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5437] chdir("./file1") = 0 [pid 5437] ioctl(5, LOOP_CLR_FD) = 0 [pid 5437] close(5) = 0 [pid 5437] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5437] creat("./file1", 000) = 5 [pid 5437] exit_group(0) = ? [pid 5437] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5437, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./216", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./216", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./216/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./216/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./216/binderfs") = 0 umount2("./216/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./216/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./216/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./216/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./216/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./216/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./216") = 0 mkdir("./217", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5439 attached , child_tidptr=0x555556c935d0) = 5439 [pid 5439] chdir("./217") = 0 [pid 5439] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5439] setpgid(0, 0) = 0 [pid 5439] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5439] write(3, "1000", 4) = 4 [pid 5439] close(3) = 0 [pid 5439] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5439] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5439] memfd_create("syzkaller", 0) = 4 [pid 5439] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5439] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5439] munmap(0x7f3f2898f000, 262144) = 0 [pid 5439] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 57.241872][ T5437] loop0: detected capacity change from 0 to 512 [ 57.250100][ T5437] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 57.263781][ T5437] EXT4-fs (loop0): 1 truncate cleaned up [pid 5439] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5439] close(4) = 0 [pid 5439] mkdir("./file1", 0777) = 0 [pid 5439] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5439] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5439] chdir("./file1") = 0 [pid 5439] ioctl(5, LOOP_CLR_FD) = 0 [pid 5439] close(5) = 0 [pid 5439] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5439] creat("./file1", 000) = 5 [pid 5439] exit_group(0) = ? [pid 5439] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5439, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./217", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./217", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./217/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./217/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./217/binderfs") = 0 umount2("./217/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./217/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./217/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./217/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./217/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./217/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./217") = 0 mkdir("./218", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556c935d0) = 5441 ./strace-static-x86_64: Process 5441 attached [pid 5441] chdir("./218") = 0 [pid 5441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5441] setpgid(0, 0) = 0 [pid 5441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5441] write(3, "1000", 4) = 4 [pid 5441] close(3) = 0 [pid 5441] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5441] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5441] memfd_create("syzkaller", 0) = 4 [pid 5441] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f2898f000 [pid 5441] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5441] munmap(0x7f3f2898f000, 262144) = 0 [pid 5441] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 57.297829][ T5439] loop0: detected capacity change from 0 to 512 [ 57.305614][ T5439] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 57.319182][ T5439] EXT4-fs (loop0): 1 truncate cleaned up [pid 5441] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5441] close(4) = 0 [pid 5441] mkdir("./file1", 0777) = 0 [pid 5441] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5441] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5441] chdir("./file1") = 0 [pid 5441] ioctl(5, LOOP_CLR_FD) = 0 [pid 5441] close(5) = 0 [pid 5441] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x7a\x00\x00\xff\xff\xff\xa5\x34\xb8\x0a\x25\x85\xce\xc1\x44\x65\x00\x00\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 890, 0) = 0 [pid 5441] creat("./file1", 000) = 5 [pid 5441] exit_group(0) = ? [pid 5441] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5441, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./218", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./218", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x555556c94620 /* 4 entries */, 32768) = 112 umount2("./218/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./218/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./218/binderfs") = 0 umount2("./218/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./218/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./218/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 umount2("./218/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./218/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(4, 0x555556c9c660 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556c9c660 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./218/file1") = 0 getdents64(3, 0x555556c94620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./218") = 0 mkdir("./219", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0