./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2332745533 <...> Warning: Permanently added '10.128.0.216' (ED25519) to the list of known hosts. execve("./syz-executor2332745533", ["./syz-executor2332745533"], 0x7fff9363d240 /* 10 vars */) = 0 brk(NULL) = 0x555555fb0000 brk(0x555555fb0d00) = 0x555555fb0d00 arch_prctl(ARCH_SET_FS, 0x555555fb0380) = 0 set_tid_address(0x555555fb0650) = 5034 set_robust_list(0x555555fb0660, 24) = 0 rseq(0x555555fb0ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2332745533", 4096) = 28 getrandom("\x12\x7c\x1c\xf3\x88\xd7\x2c\xad", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555fb0d00 brk(0x555555fd1d00) = 0x555555fd1d00 brk(0x555555fd2000) = 0x555555fd2000 mprotect(0x7f3d5cfc9000, 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 mkdir("./syzkaller.ct9hHL", 0700) = 0 chmod("./syzkaller.ct9hHL", 0777) = 0 chdir("./syzkaller.ct9hHL") = 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./strace-static-x86_64: Process 5035 attached , child_tidptr=0x555555fb0650) = 5035 [pid 5035] set_robust_list(0x555555fb0660, 24) = 0 [pid 5035] chdir("./0") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 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 [ 72.672333][ T5035] syz-executor233[5035]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.695574][ T5035] loop0: detected capacity change from 0 to 512 [ 72.707853][ T5035] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [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=7 /* 0.07 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 72.728780][ T5035] EXT4-fs (loop0): 1 truncate cleaned up [ 72.734824][ T5035] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. unlink("./0/binderfs") = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5039 attached , child_tidptr=0x555555fb0650) = 5039 [pid 5039] set_robust_list(0x555555fb0660, 24) = 0 [pid 5039] chdir("./1") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5039] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 72.797992][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5039] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5039] close(4) = 0 [pid 5039] mkdir("./file1", 0777) = 0 [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=5 /* 0.05 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./1/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/binderfs") = 0 [ 72.856290][ T5039] loop0: detected capacity change from 0 to 512 [ 72.868903][ T5039] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 72.885524][ T5039] EXT4-fs (loop0): 1 truncate cleaned up [ 72.891215][ T5039] 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) newfstatat(AT_FDCWD, "./1/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5041 ./strace-static-x86_64: Process 5041 attached [pid 5041] set_robust_list(0x555555fb0660, 24) = 0 [pid 5041] chdir("./2") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5041] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 72.932727][ T5034] 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=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./2/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/binderfs") = 0 [ 72.986992][ T5041] loop0: detected capacity change from 0 to 512 [ 72.998801][ T5041] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.016362][ T5041] EXT4-fs (loop0): 1 truncate cleaned up [ 73.022323][ T5041] 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) newfstatat(AT_FDCWD, "./2/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5043 ./strace-static-x86_64: Process 5043 attached [pid 5043] set_robust_list(0x555555fb0660, 24) = 0 [pid 5043] chdir("./3") = 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) = 0x7f3d54b16000 [ 73.068488][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [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(0x7f3d54b16000, 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 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./3/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/binderfs") = 0 [ 73.143378][ T5043] loop0: detected capacity change from 0 to 512 [ 73.152604][ T5043] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.169824][ T5043] EXT4-fs (loop0): 1 truncate cleaned up [ 73.175686][ T5043] 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) newfstatat(AT_FDCWD, "./3/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5046 attached , child_tidptr=0x555555fb0650) = 5046 [pid 5046] set_robust_list(0x555555fb0660, 24) = 0 [pid 5046] chdir("./4") = 0 [pid 5046] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5046] setpgid(0, 0) = 0 [pid 5046] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1000", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5046] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5046] memfd_create("syzkaller", 0) = 4 [pid 5046] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5046] 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 [ 73.220328][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5046] munmap(0x7f3d54b16000, 262144) = 0 [pid 5046] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5046] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5046] close(4) = 0 [pid 5046] mkdir("./file1", 0777) = 0 [pid 5046] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5046] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5046] chdir("./file1") = 0 [pid 5046] ioctl(5, LOOP_CLR_FD) = 0 [pid 5046] close(5) = 0 [pid 5046] 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 5046] creat("./file1", 000) = 5 [pid 5046] exit_group(0) = ? [pid 5046] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5046, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./4", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./4/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/binderfs") = 0 [ 73.283816][ T5046] loop0: detected capacity change from 0 to 512 [ 73.296596][ T5046] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.313306][ T5046] EXT4-fs (loop0): 1 truncate cleaned up [ 73.318972][ T5046] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5048 attached , child_tidptr=0x555555fb0650) = 5048 [pid 5048] set_robust_list(0x555555fb0660, 24) = 0 [pid 5048] chdir("./5") = 0 [pid 5048] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5048] setpgid(0, 0) = 0 [pid 5048] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5048] write(3, "1000", 4) = 4 [pid 5048] close(3) = 0 [pid 5048] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5048] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5048] memfd_create("syzkaller", 0) = 4 [pid 5048] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5048] 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 [ 73.356968][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5048] munmap(0x7f3d54b16000, 262144) = 0 [pid 5048] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5048] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5048] close(4) = 0 [pid 5048] mkdir("./file1", 0777) = 0 [pid 5048] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5048] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5048] chdir("./file1") = 0 [pid 5048] ioctl(5, LOOP_CLR_FD) = 0 [pid 5048] close(5) = 0 [pid 5048] 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 5048] creat("./file1", 000) = 5 [pid 5048] exit_group(0) = ? [pid 5048] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5048, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./5", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./5/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/binderfs") = 0 [ 73.400001][ T5048] loop0: detected capacity change from 0 to 512 [ 73.413255][ T5048] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.429903][ T5048] EXT4-fs (loop0): 1 truncate cleaned up [ 73.436291][ T5048] 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) newfstatat(AT_FDCWD, "./5/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5050 attached , child_tidptr=0x555555fb0650) = 5050 [pid 5050] set_robust_list(0x555555fb0660, 24) = 0 [pid 5050] chdir("./6") = 0 [pid 5050] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5050] setpgid(0, 0) = 0 [pid 5050] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5050] write(3, "1000", 4) = 4 [pid 5050] close(3) = 0 [pid 5050] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5050] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5050] memfd_create("syzkaller", 0) = 4 [pid 5050] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5050] 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 5050] munmap(0x7f3d54b16000, 262144) = 0 [pid 5050] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 73.483326][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5050] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5050] close(4) = 0 [pid 5050] mkdir("./file1", 0777) = 0 [pid 5050] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5050] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5050] chdir("./file1") = 0 [pid 5050] ioctl(5, LOOP_CLR_FD) = 0 [pid 5050] close(5) = 0 [pid 5050] 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 5050] creat("./file1", 000) = 5 [pid 5050] exit_group(0) = ? [pid 5050] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5050, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./6", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./6/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/binderfs") = 0 [ 73.538079][ T5050] loop0: detected capacity change from 0 to 512 [ 73.548412][ T5050] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.565212][ T5050] EXT4-fs (loop0): 1 truncate cleaned up [ 73.570897][ T5050] 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) newfstatat(AT_FDCWD, "./6/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5052 attached , child_tidptr=0x555555fb0650) = 5052 [pid 5052] set_robust_list(0x555555fb0660, 24) = 0 [pid 5052] chdir("./7") = 0 [pid 5052] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5052] setpgid(0, 0) = 0 [pid 5052] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1000", 4) = 4 [pid 5052] close(3) = 0 [pid 5052] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5052] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5052] memfd_create("syzkaller", 0) = 4 [pid 5052] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5052] 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 5052] munmap(0x7f3d54b16000, 262144) = 0 [pid 5052] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 73.618816][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5052] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5052] close(4) = 0 [pid 5052] mkdir("./file1", 0777) = 0 [pid 5052] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5052] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5052] chdir("./file1") = 0 [pid 5052] ioctl(5, LOOP_CLR_FD) = 0 [pid 5052] close(5) = 0 [pid 5052] 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 5052] creat("./file1", 000) = 5 [pid 5052] exit_group(0) = ? [pid 5052] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5052, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./7", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./7/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/binderfs") = 0 [ 73.671369][ T5052] loop0: detected capacity change from 0 to 512 [ 73.682458][ T5052] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.699053][ T5052] EXT4-fs (loop0): 1 truncate cleaned up [ 73.705177][ T5052] 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) newfstatat(AT_FDCWD, "./7/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5054 attached [pid 5054] set_robust_list(0x555555fb0660, 24) = 0 [pid 5054] chdir("./8") = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5054 [pid 5054] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5054] setpgid(0, 0) = 0 [pid 5054] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5054] write(3, "1000", 4) = 4 [pid 5054] close(3) = 0 [pid 5054] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5054] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5054] memfd_create("syzkaller", 0) = 4 [pid 5054] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5054] 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 5054] munmap(0x7f3d54b16000, 262144) = 0 [pid 5054] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 73.741748][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5054] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5054] close(4) = 0 [pid 5054] mkdir("./file1", 0777) = 0 [pid 5054] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5054] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5054] chdir("./file1") = 0 [pid 5054] ioctl(5, LOOP_CLR_FD) = 0 [pid 5054] close(5) = 0 [pid 5054] 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 5054] creat("./file1", 000) = 5 [pid 5054] exit_group(0) = ? [pid 5054] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5054, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./8", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./8/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/binderfs") = 0 [ 73.801459][ T5054] loop0: detected capacity change from 0 to 512 [ 73.811419][ T5054] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.827897][ T5054] EXT4-fs (loop0): 1 truncate cleaned up [ 73.833672][ T5054] 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) newfstatat(AT_FDCWD, "./8/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5056 attached , child_tidptr=0x555555fb0650) = 5056 [pid 5056] set_robust_list(0x555555fb0660, 24) = 0 [pid 5056] chdir("./9") = 0 [pid 5056] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5056] setpgid(0, 0) = 0 [pid 5056] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "1000", 4) = 4 [pid 5056] close(3) = 0 [pid 5056] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5056] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5056] memfd_create("syzkaller", 0) = 4 [pid 5056] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5056] 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 5056] munmap(0x7f3d54b16000, 262144) = 0 [pid 5056] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 73.876826][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5056] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5056] close(4) = 0 [pid 5056] mkdir("./file1", 0777) = 0 [pid 5056] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5056] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5056] chdir("./file1") = 0 [pid 5056] ioctl(5, LOOP_CLR_FD) = 0 [pid 5056] close(5) = 0 [pid 5056] 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 5056] creat("./file1", 000) = 5 [pid 5056] exit_group(0) = ? [pid 5056] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5056, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./9/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/binderfs") = 0 [ 73.933454][ T5056] loop0: detected capacity change from 0 to 512 [ 73.946057][ T5056] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 73.962145][ T5056] EXT4-fs (loop0): 1 truncate cleaned up [ 73.968683][ T5056] 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) newfstatat(AT_FDCWD, "./9/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5058 attached , child_tidptr=0x555555fb0650) = 5058 [pid 5058] set_robust_list(0x555555fb0660, 24) = 0 [pid 5058] chdir("./10") = 0 [pid 5058] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5058] setpgid(0, 0) = 0 [pid 5058] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1000", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5058] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5058] memfd_create("syzkaller", 0) = 4 [pid 5058] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5058] 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 5058] munmap(0x7f3d54b16000, 262144) = 0 [pid 5058] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 74.010653][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5058] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5058] close(4) = 0 [pid 5058] mkdir("./file1", 0777) = 0 [pid 5058] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5058] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5058] chdir("./file1") = 0 [pid 5058] ioctl(5, LOOP_CLR_FD) = 0 [pid 5058] close(5) = 0 [pid 5058] 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 5058] creat("./file1", 000) = 5 [pid 5058] exit_group(0) = ? [pid 5058] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5058, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./10/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/binderfs") = 0 [ 74.067804][ T5058] loop0: detected capacity change from 0 to 512 [ 74.079448][ T5058] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.095709][ T5058] EXT4-fs (loop0): 1 truncate cleaned up [ 74.101379][ T5058] 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) newfstatat(AT_FDCWD, "./10/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5060 attached , child_tidptr=0x555555fb0650) = 5060 [pid 5060] set_robust_list(0x555555fb0660, 24) = 0 [pid 5060] chdir("./11") = 0 [pid 5060] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5060] setpgid(0, 0) = 0 [pid 5060] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "1000", 4) = 4 [pid 5060] close(3) = 0 [pid 5060] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5060] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5060] memfd_create("syzkaller", 0) = 4 [pid 5060] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5060] 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 5060] munmap(0x7f3d54b16000, 262144) = 0 [pid 5060] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 74.151491][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5060] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5060] close(4) = 0 [pid 5060] mkdir("./file1", 0777) = 0 [pid 5060] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5060] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5060] chdir("./file1") = 0 [pid 5060] ioctl(5, LOOP_CLR_FD) = 0 [pid 5060] close(5) = 0 [pid 5060] 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 5060] creat("./file1", 000) = 5 [pid 5060] exit_group(0) = ? [pid 5060] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5060, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./11", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./11/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/binderfs") = 0 [ 74.210443][ T5060] loop0: detected capacity change from 0 to 512 [ 74.220971][ T5060] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.237613][ T5060] EXT4-fs (loop0): 1 truncate cleaned up [ 74.243517][ T5060] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5062 attached , child_tidptr=0x555555fb0650) = 5062 [pid 5062] set_robust_list(0x555555fb0660, 24) = 0 [pid 5062] chdir("./12") = 0 [pid 5062] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5062] setpgid(0, 0) = 0 [pid 5062] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "1000", 4) = 4 [pid 5062] close(3) = 0 [pid 5062] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5062] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5062] memfd_create("syzkaller", 0) = 4 [pid 5062] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5062] 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 5062] munmap(0x7f3d54b16000, 262144) = 0 [pid 5062] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 74.292307][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5062] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5062] close(4) = 0 [pid 5062] mkdir("./file1", 0777) = 0 [pid 5062] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5062] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5062] chdir("./file1") = 0 [pid 5062] ioctl(5, LOOP_CLR_FD) = 0 [pid 5062] close(5) = 0 [pid 5062] 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 5062] creat("./file1", 000) = 5 [pid 5062] exit_group(0) = ? [pid 5062] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5062, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./12/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/binderfs") = 0 [ 74.344512][ T5062] loop0: detected capacity change from 0 to 512 [ 74.355034][ T5062] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.371525][ T5062] EXT4-fs (loop0): 1 truncate cleaned up [ 74.377590][ T5062] 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) newfstatat(AT_FDCWD, "./12/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5064 attached , child_tidptr=0x555555fb0650) = 5064 [pid 5064] set_robust_list(0x555555fb0660, 24) = 0 [pid 5064] chdir("./13") = 0 [pid 5064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5064] setpgid(0, 0) = 0 [pid 5064] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1000", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5064] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5064] memfd_create("syzkaller", 0) = 4 [pid 5064] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5064] 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 5064] munmap(0x7f3d54b16000, 262144) = 0 [ 74.414048][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5064] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5064] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5064] close(4) = 0 [pid 5064] mkdir("./file1", 0777) = 0 [pid 5064] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5064] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5064] chdir("./file1") = 0 [pid 5064] ioctl(5, LOOP_CLR_FD) = 0 [pid 5064] close(5) = 0 [pid 5064] 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 5064] creat("./file1", 000) = 5 [pid 5064] exit_group(0) = ? [pid 5064] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5064, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./13", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./13/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/binderfs") = 0 [ 74.469374][ T5064] loop0: detected capacity change from 0 to 512 [ 74.479242][ T5064] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.495596][ T5064] EXT4-fs (loop0): 1 truncate cleaned up [ 74.501385][ T5064] 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) newfstatat(AT_FDCWD, "./13/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5066 attached , child_tidptr=0x555555fb0650) = 5066 [pid 5066] set_robust_list(0x555555fb0660, 24) = 0 [pid 5066] chdir("./14") = 0 [pid 5066] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5066] setpgid(0, 0) = 0 [pid 5066] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1000", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5066] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5066] memfd_create("syzkaller", 0) = 4 [pid 5066] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 74.531610][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5066] 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 5066] munmap(0x7f3d54b16000, 262144) = 0 [pid 5066] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5066] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5066] close(4) = 0 [pid 5066] mkdir("./file1", 0777) = 0 [pid 5066] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5066] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5066] chdir("./file1") = 0 [pid 5066] ioctl(5, LOOP_CLR_FD) = 0 [pid 5066] close(5) = 0 [pid 5066] 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 5066] creat("./file1", 000) = 5 [pid 5066] exit_group(0) = ? [pid 5066] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5066, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./14", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./14/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/binderfs") = 0 [ 74.600731][ T5066] loop0: detected capacity change from 0 to 512 [ 74.611753][ T5066] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.628489][ T5066] EXT4-fs (loop0): 1 truncate cleaned up [ 74.634668][ T5066] 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) newfstatat(AT_FDCWD, "./14/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5068 attached , child_tidptr=0x555555fb0650) = 5068 [pid 5068] set_robust_list(0x555555fb0660, 24) = 0 [pid 5068] chdir("./15") = 0 [pid 5068] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5068] setpgid(0, 0) = 0 [pid 5068] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1000", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5068] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5068] memfd_create("syzkaller", 0) = 4 [pid 5068] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5068] 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 5068] munmap(0x7f3d54b16000, 262144) = 0 [pid 5068] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 74.674243][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5068] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5068] close(4) = 0 [pid 5068] mkdir("./file1", 0777) = 0 [pid 5068] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5068] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5068] chdir("./file1") = 0 [pid 5068] ioctl(5, LOOP_CLR_FD) = 0 [pid 5068] close(5) = 0 [pid 5068] 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 5068] creat("./file1", 000) = 5 [pid 5068] exit_group(0) = ? [pid 5068] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5068, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./15", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 [ 74.721412][ T5068] loop0: detected capacity change from 0 to 512 [ 74.732283][ T5068] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.749017][ T5068] EXT4-fs (loop0): 1 truncate cleaned up [ 74.755118][ T5068] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./15/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/binderfs") = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./15/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5070 ./strace-static-x86_64: Process 5070 attached [pid 5070] set_robust_list(0x555555fb0660, 24) = 0 [pid 5070] chdir("./16") = 0 [pid 5070] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5070] setpgid(0, 0) = 0 [pid 5070] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "1000", 4) = 4 [pid 5070] close(3) = 0 [pid 5070] symlink("/dev/binderfs", "./binderfs") = 0 [ 74.806752][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5070] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5070] memfd_create("syzkaller", 0) = 4 [pid 5070] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5070] 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 5070] munmap(0x7f3d54b16000, 262144) = 0 [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5070] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5070] close(4) = 0 [pid 5070] mkdir("./file1", 0777) = 0 [pid 5070] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5070] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5070] chdir("./file1") = 0 [pid 5070] ioctl(5, LOOP_CLR_FD) = 0 [pid 5070] close(5) = 0 [pid 5070] 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 5070] creat("./file1", 000) = 5 [pid 5070] exit_group(0) = ? [pid 5070] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5070, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./16/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/binderfs") = 0 [ 74.879605][ T5070] loop0: detected capacity change from 0 to 512 [ 74.889881][ T5070] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 74.907715][ T5070] EXT4-fs (loop0): 1 truncate cleaned up [ 74.913730][ T5070] 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) newfstatat(AT_FDCWD, "./16/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5072 attached , child_tidptr=0x555555fb0650) = 5072 [pid 5072] set_robust_list(0x555555fb0660, 24) = 0 [pid 5072] chdir("./17") = 0 [pid 5072] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5072] setpgid(0, 0) = 0 [pid 5072] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1000", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5072] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5072] memfd_create("syzkaller", 0) = 4 [pid 5072] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5072] 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 5072] munmap(0x7f3d54b16000, 262144) = 0 [pid 5072] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 74.949147][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5072] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5072] close(4) = 0 [pid 5072] mkdir("./file1", 0777) = 0 [pid 5072] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5072] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5072] chdir("./file1") = 0 [pid 5072] ioctl(5, LOOP_CLR_FD) = 0 [pid 5072] close(5) = 0 [pid 5072] 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 5072] creat("./file1", 000) = 5 [pid 5072] exit_group(0) = ? [pid 5072] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5072, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./17", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./17/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/binderfs") = 0 [ 75.006172][ T5072] loop0: detected capacity change from 0 to 512 [ 75.017329][ T5072] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.034536][ T5072] EXT4-fs (loop0): 1 truncate cleaned up [ 75.040209][ T5072] 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) newfstatat(AT_FDCWD, "./17/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5074 attached , child_tidptr=0x555555fb0650) = 5074 [pid 5074] set_robust_list(0x555555fb0660, 24) = 0 [pid 5074] chdir("./18") = 0 [pid 5074] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5074] setpgid(0, 0) = 0 [pid 5074] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5074] write(3, "1000", 4) = 4 [pid 5074] close(3) = 0 [pid 5074] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5074] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5074] memfd_create("syzkaller", 0) = 4 [pid 5074] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 75.082035][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5074] 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 5074] munmap(0x7f3d54b16000, 262144) = 0 [pid 5074] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5074] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5074] close(4) = 0 [pid 5074] mkdir("./file1", 0777) = 0 [pid 5074] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5074] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5074] chdir("./file1") = 0 [pid 5074] ioctl(5, LOOP_CLR_FD) = 0 [pid 5074] close(5) = 0 [pid 5074] 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 5074] creat("./file1", 000) = 5 [pid 5074] exit_group(0) = ? [pid 5074] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5074, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./18/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/binderfs") = 0 [ 75.148284][ T5074] loop0: detected capacity change from 0 to 512 [ 75.159799][ T5074] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.179315][ T5074] EXT4-fs (loop0): 1 truncate cleaned up [ 75.185404][ T5074] 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) newfstatat(AT_FDCWD, "./18/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5076 attached , child_tidptr=0x555555fb0650) = 5076 [pid 5076] set_robust_list(0x555555fb0660, 24) = 0 [pid 5076] chdir("./19") = 0 [pid 5076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5076] setpgid(0, 0) = 0 [pid 5076] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1000", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5076] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5076] memfd_create("syzkaller", 0) = 4 [pid 5076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5076] 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 5076] munmap(0x7f3d54b16000, 262144) = 0 [pid 5076] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 75.223560][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5076] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5076] close(4) = 0 [pid 5076] mkdir("./file1", 0777) = 0 [pid 5076] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5076] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5076] chdir("./file1") = 0 [pid 5076] ioctl(5, LOOP_CLR_FD) = 0 [pid 5076] close(5) = 0 [pid 5076] 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 5076] creat("./file1", 000) = 5 [pid 5076] exit_group(0) = ? [pid 5076] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5076, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./19/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/binderfs") = 0 [ 75.277436][ T5076] loop0: detected capacity change from 0 to 512 [ 75.287951][ T5076] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.304104][ T5076] EXT4-fs (loop0): 1 truncate cleaned up [ 75.309879][ T5076] 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) newfstatat(AT_FDCWD, "./19/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5078 attached , child_tidptr=0x555555fb0650) = 5078 [pid 5078] set_robust_list(0x555555fb0660, 24) = 0 [pid 5078] chdir("./20") = 0 [pid 5078] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5078] setpgid(0, 0) = 0 [pid 5078] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5078] write(3, "1000", 4) = 4 [pid 5078] close(3) = 0 [pid 5078] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5078] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5078] memfd_create("syzkaller", 0) = 4 [pid 5078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5078] 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 [ 75.348454][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5078] munmap(0x7f3d54b16000, 262144) = 0 [pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5078] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5078] close(4) = 0 [pid 5078] mkdir("./file1", 0777) = 0 [pid 5078] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5078] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5078] chdir("./file1") = 0 [pid 5078] ioctl(5, LOOP_CLR_FD) = 0 [pid 5078] close(5) = 0 [pid 5078] 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 5078] creat("./file1", 000) = 5 [pid 5078] exit_group(0) = ? [pid 5078] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5078, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./20", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./20/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/binderfs") = 0 [ 75.410997][ T5078] loop0: detected capacity change from 0 to 512 [ 75.421414][ T5078] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.437996][ T5078] EXT4-fs (loop0): 1 truncate cleaned up [ 75.443923][ T5078] 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) newfstatat(AT_FDCWD, "./20/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5080 ./strace-static-x86_64: Process 5080 attached [pid 5080] set_robust_list(0x555555fb0660, 24) = 0 [pid 5080] chdir("./21") = 0 [pid 5080] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5080] setpgid(0, 0) = 0 [pid 5080] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1000", 4) = 4 [pid 5080] close(3) = 0 [pid 5080] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5080] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5080] memfd_create("syzkaller", 0) = 4 [pid 5080] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5080] 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 5080] munmap(0x7f3d54b16000, 262144) = 0 [pid 5080] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 75.483383][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5080] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5080] close(4) = 0 [pid 5080] mkdir("./file1", 0777) = 0 [pid 5080] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5080] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5080] chdir("./file1") = 0 [pid 5080] ioctl(5, LOOP_CLR_FD) = 0 [pid 5080] close(5) = 0 [pid 5080] 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 5080] creat("./file1", 000) = 5 [pid 5080] exit_group(0) = ? [pid 5080] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5080, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./21", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./21/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/binderfs") = 0 [ 75.538634][ T5080] loop0: detected capacity change from 0 to 512 [ 75.549105][ T5080] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.564755][ T5080] EXT4-fs (loop0): 1 truncate cleaned up [ 75.570426][ T5080] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5082 attached , child_tidptr=0x555555fb0650) = 5082 [pid 5082] set_robust_list(0x555555fb0660, 24) = 0 [pid 5082] chdir("./22") = 0 [pid 5082] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5082] setpgid(0, 0) = 0 [pid 5082] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5082] write(3, "1000", 4) = 4 [pid 5082] close(3) = 0 [ 75.610493][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5082] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5082] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5082] memfd_create("syzkaller", 0) = 4 [pid 5082] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5082] 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 5082] munmap(0x7f3d54b16000, 262144) = 0 [pid 5082] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5082] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5082] close(4) = 0 [pid 5082] mkdir("./file1", 0777) = 0 [pid 5082] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5082] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5082] chdir("./file1") = 0 [pid 5082] ioctl(5, LOOP_CLR_FD) = 0 [pid 5082] close(5) = 0 [pid 5082] 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 5082] creat("./file1", 000) = 5 [pid 5082] exit_group(0) = ? [pid 5082] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5082, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./22/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/binderfs") = 0 [ 75.684586][ T5082] loop0: detected capacity change from 0 to 512 [ 75.694900][ T5082] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.711227][ T5082] EXT4-fs (loop0): 1 truncate cleaned up [ 75.718070][ T5082] 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) newfstatat(AT_FDCWD, "./22/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5084 ./strace-static-x86_64: Process 5084 attached [pid 5084] set_robust_list(0x555555fb0660, 24) = 0 [pid 5084] chdir("./23") = 0 [pid 5084] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5084] setpgid(0, 0) = 0 [pid 5084] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5084] write(3, "1000", 4) = 4 [pid 5084] close(3) = 0 [pid 5084] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5084] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5084] memfd_create("syzkaller", 0) = 4 [pid 5084] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5084] 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 5084] munmap(0x7f3d54b16000, 262144) = 0 [pid 5084] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 75.763161][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5084] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5084] close(4) = 0 [pid 5084] mkdir("./file1", 0777) = 0 [pid 5084] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5084] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5084] chdir("./file1") = 0 [pid 5084] ioctl(5, LOOP_CLR_FD) = 0 [pid 5084] close(5) = 0 [pid 5084] 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 5084] creat("./file1", 000) = 5 [pid 5084] exit_group(0) = ? [pid 5084] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5084, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./23", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./23/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/binderfs") = 0 [ 75.811064][ T5084] loop0: detected capacity change from 0 to 512 [ 75.821485][ T5084] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.838206][ T5084] EXT4-fs (loop0): 1 truncate cleaned up [ 75.844171][ T5084] 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) newfstatat(AT_FDCWD, "./23/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5086 ./strace-static-x86_64: Process 5086 attached [pid 5086] set_robust_list(0x555555fb0660, 24) = 0 [pid 5086] chdir("./24") = 0 [pid 5086] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5086] setpgid(0, 0) = 0 [pid 5086] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "1000", 4) = 4 [pid 5086] close(3) = 0 [pid 5086] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5086] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5086] memfd_create("syzkaller", 0) = 4 [pid 5086] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5086] 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 5086] munmap(0x7f3d54b16000, 262144) = 0 [pid 5086] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 75.890115][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5086] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5086] close(4) = 0 [pid 5086] mkdir("./file1", 0777) = 0 [ 75.947136][ T5086] loop0: detected capacity change from 0 to 512 [ 75.960708][ T5086] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 75.978980][ T5086] EXT4-fs (loop0): 1 truncate cleaned up [ 75.985206][ T5086] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5086] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5086] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5086] chdir("./file1") = 0 [pid 5086] ioctl(5, LOOP_CLR_FD) = 0 [pid 5086] close(5) = 0 [pid 5086] 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 5086] creat("./file1", 000) = 5 [pid 5086] exit_group(0) = ? [pid 5086] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5086, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./24", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./24/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/binderfs") = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5088 attached , child_tidptr=0x555555fb0650) = 5088 [pid 5088] set_robust_list(0x555555fb0660, 24) = 0 [pid 5088] chdir("./25") = 0 [pid 5088] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5088] setpgid(0, 0) = 0 [pid 5088] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5088] write(3, "1000", 4) = 4 [pid 5088] close(3) = 0 [ 76.022565][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5088] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5088] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5088] memfd_create("syzkaller", 0) = 4 [pid 5088] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5088] 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 5088] munmap(0x7f3d54b16000, 262144) = 0 [pid 5088] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5088] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5088] close(4) = 0 [pid 5088] mkdir("./file1", 0777) = 0 [pid 5088] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5088] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5088] chdir("./file1") = 0 [pid 5088] ioctl(5, LOOP_CLR_FD) = 0 [pid 5088] close(5) = 0 [pid 5088] 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 5088] creat("./file1", 000) = 5 [pid 5088] exit_group(0) = ? [pid 5088] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5088, 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./25/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/binderfs") = 0 [ 76.096178][ T5088] loop0: detected capacity change from 0 to 512 [ 76.106309][ T5088] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.122972][ T5088] EXT4-fs (loop0): 1 truncate cleaned up [ 76.128654][ T5088] 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) newfstatat(AT_FDCWD, "./25/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5090 ./strace-static-x86_64: Process 5090 attached [pid 5090] set_robust_list(0x555555fb0660, 24) = 0 [pid 5090] chdir("./26") = 0 [pid 5090] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5090] setpgid(0, 0) = 0 [pid 5090] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5090] write(3, "1000", 4) = 4 [pid 5090] close(3) = 0 [pid 5090] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5090] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5090] memfd_create("syzkaller", 0) = 4 [pid 5090] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5090] 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 5090] munmap(0x7f3d54b16000, 262144) = 0 [ 76.169308][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5090] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5090] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5090] close(4) = 0 [pid 5090] mkdir("./file1", 0777) = 0 [pid 5090] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5090] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5090] chdir("./file1") = 0 [pid 5090] ioctl(5, LOOP_CLR_FD) = 0 [pid 5090] close(5) = 0 [pid 5090] 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 5090] creat("./file1", 000) = 5 [pid 5090] exit_group(0) = ? [pid 5090] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5090, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./26", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./26/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/binderfs") = 0 [ 76.217165][ T5090] loop0: detected capacity change from 0 to 512 [ 76.226974][ T5090] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.244509][ T5090] EXT4-fs (loop0): 1 truncate cleaned up [ 76.250209][ T5090] 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) newfstatat(AT_FDCWD, "./26/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5092 attached , child_tidptr=0x555555fb0650) = 5092 [pid 5092] set_robust_list(0x555555fb0660, 24) = 0 [pid 5092] chdir("./27") = 0 [pid 5092] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5092] setpgid(0, 0) = 0 [pid 5092] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5092] write(3, "1000", 4) = 4 [pid 5092] close(3) = 0 [pid 5092] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5092] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5092] memfd_create("syzkaller", 0) = 4 [pid 5092] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5092] 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 5092] munmap(0x7f3d54b16000, 262144) = 0 [pid 5092] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 76.298244][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5092] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5092] close(4) = 0 [pid 5092] mkdir("./file1", 0777) = 0 [pid 5092] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5092] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5092] chdir("./file1") = 0 [pid 5092] ioctl(5, LOOP_CLR_FD) = 0 [pid 5092] close(5) = 0 [pid 5092] 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 5092] creat("./file1", 000) = 5 [pid 5092] exit_group(0) = ? [pid 5092] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5092, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./27", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./27/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/binderfs") = 0 [ 76.353361][ T5092] loop0: detected capacity change from 0 to 512 [ 76.363663][ T5092] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.380240][ T5092] EXT4-fs (loop0): 1 truncate cleaned up [ 76.385986][ T5092] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5094 attached , child_tidptr=0x555555fb0650) = 5094 [pid 5094] set_robust_list(0x555555fb0660, 24) = 0 [pid 5094] chdir("./28") = 0 [ 76.425492][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5094] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5094] setpgid(0, 0) = 0 [pid 5094] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5094] write(3, "1000", 4) = 4 [pid 5094] close(3) = 0 [pid 5094] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5094] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5094] memfd_create("syzkaller", 0) = 4 [pid 5094] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5094] 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 5094] munmap(0x7f3d54b16000, 262144) = 0 [pid 5094] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5094] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5094] close(4) = 0 [pid 5094] mkdir("./file1", 0777) = 0 [pid 5094] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5094] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5094] chdir("./file1") = 0 [pid 5094] ioctl(5, LOOP_CLR_FD) = 0 [pid 5094] close(5) = 0 [pid 5094] 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 5094] creat("./file1", 000) = 5 [pid 5094] exit_group(0) = ? [pid 5094] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5094, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./28", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./28/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/binderfs") = 0 [ 76.505126][ T5094] loop0: detected capacity change from 0 to 512 [ 76.517134][ T5094] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.534147][ T5094] EXT4-fs (loop0): 1 truncate cleaned up [ 76.539878][ T5094] 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) newfstatat(AT_FDCWD, "./28/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5096 ./strace-static-x86_64: Process 5096 attached [pid 5096] set_robust_list(0x555555fb0660, 24) = 0 [pid 5096] chdir("./29") = 0 [pid 5096] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5096] setpgid(0, 0) = 0 [pid 5096] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5096] write(3, "1000", 4) = 4 [pid 5096] close(3) = 0 [pid 5096] symlink("/dev/binderfs", "./binderfs") = 0 [ 76.582847][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5096] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5096] memfd_create("syzkaller", 0) = 4 [pid 5096] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5096] 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 5096] munmap(0x7f3d54b16000, 262144) = 0 [pid 5096] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5096] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5096] close(4) = 0 [pid 5096] mkdir("./file1", 0777) = 0 [pid 5096] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5096] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5096] chdir("./file1") = 0 [pid 5096] ioctl(5, LOOP_CLR_FD) = 0 [pid 5096] close(5) = 0 [pid 5096] 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 5096] creat("./file1", 000) = 5 [pid 5096] exit_group(0) = ? [pid 5096] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5096, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./29", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./29/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/binderfs") = 0 [ 76.656378][ T5096] loop0: detected capacity change from 0 to 512 [ 76.666550][ T5096] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.683534][ T5096] EXT4-fs (loop0): 1 truncate cleaned up [ 76.689215][ T5096] 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) newfstatat(AT_FDCWD, "./29/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5098 attached , child_tidptr=0x555555fb0650) = 5098 [pid 5098] set_robust_list(0x555555fb0660, 24) = 0 [pid 5098] chdir("./30") = 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) = 0x7f3d54b16000 [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 [ 76.737488][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5098] munmap(0x7f3d54b16000, 262144) = 0 [pid 5098] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=5 /* 0.05 s */} --- umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./30/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/binderfs") = 0 [ 76.802543][ T5098] loop0: detected capacity change from 0 to 512 [ 76.812938][ T5098] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.829444][ T5098] EXT4-fs (loop0): 1 truncate cleaned up [ 76.835242][ T5098] 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) newfstatat(AT_FDCWD, "./30/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5100 attached , child_tidptr=0x555555fb0650) = 5100 [pid 5100] set_robust_list(0x555555fb0660, 24) = 0 [pid 5100] chdir("./31") = 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 [ 76.885043][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 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("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./31/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/binderfs") = 0 [ 76.960006][ T5100] loop0: detected capacity change from 0 to 512 [ 76.971561][ T5100] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 76.988070][ T5100] EXT4-fs (loop0): 1 truncate cleaned up [ 76.994365][ T5100] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5102 attached [pid 5102] set_robust_list(0x555555fb0660, 24) = 0 [pid 5102] chdir("./32") = 0 [pid 5102] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5102] setpgid(0, 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5102 [pid 5102] <... setpgid resumed>) = 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) = 0x7f3d54b16000 [ 77.034415][ T5034] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [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(0x7f3d54b16000, 262144) = 0 [pid 5102] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=5 /* 0.05 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./32/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/binderfs") = 0 umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 77.106862][ T5102] loop0: detected capacity change from 0 to 512 [ 77.117291][ T5102] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 77.133067][ T5102] EXT4-fs (loop0): 1 truncate cleaned up umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5104 attached , child_tidptr=0x555555fb0650) = 5104 [pid 5104] set_robust_list(0x555555fb0660, 24) = 0 [pid 5104] chdir("./33") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 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("./33", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./33/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/binderfs") = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 77.226624][ T5104] loop0: detected capacity change from 0 to 512 [ 77.236432][ T5104] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 77.253821][ T5104] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./33/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5106 attached , child_tidptr=0x555555fb0650) = 5106 [pid 5106] set_robust_list(0x555555fb0660, 24) = 0 [pid 5106] chdir("./34") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5106] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./34", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./34/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/binderfs") = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 [ 77.335439][ T5106] loop0: detected capacity change from 0 to 512 [ 77.345349][ T5106] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 77.361457][ T5106] EXT4-fs (loop0): 1 truncate cleaned up 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=0x555555fb0650) = 5108 ./strace-static-x86_64: Process 5108 attached [pid 5108] set_robust_list(0x555555fb0660, 24) = 0 [pid 5108] chdir("./35") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5108] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./35", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./35/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/binderfs") = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 77.456394][ T5108] loop0: detected capacity change from 0 to 512 [ 77.467049][ T5108] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 77.483628][ T5108] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./35/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5111 attached , child_tidptr=0x555555fb0650) = 5111 [pid 5111] set_robust_list(0x555555fb0660, 24) = 0 [pid 5111] chdir("./36") = 0 [pid 5111] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5111] setpgid(0, 0) = 0 [pid 5111] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5111] write(3, "1000", 4) = 4 [pid 5111] close(3) = 0 [pid 5111] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5111] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5111] memfd_create("syzkaller", 0) = 4 [pid 5111] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5111] 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 5111] munmap(0x7f3d54b16000, 262144) = 0 [pid 5111] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5111] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5111] close(4) = 0 [pid 5111] mkdir("./file1", 0777) = 0 [ 77.566800][ T5111] loop0: detected capacity change from 0 to 512 [ 77.577590][ T5111] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5111] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5111] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5111] chdir("./file1") = 0 [pid 5111] ioctl(5, LOOP_CLR_FD) = 0 [pid 5111] close(5) = 0 [pid 5111] 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 5111] creat("./file1", 000) = 5 [pid 5111] exit_group(0) = ? [pid 5111] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5111, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./36", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./36/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/binderfs") = 0 [ 77.608225][ T5111] EXT4-fs (loop0): 1 truncate cleaned up umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5113 attached , child_tidptr=0x555555fb0650) = 5113 [pid 5113] set_robust_list(0x555555fb0660, 24) = 0 [pid 5113] chdir("./37") = 0 [pid 5113] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5113] setpgid(0, 0) = 0 [pid 5113] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5113] write(3, "1000", 4) = 4 [pid 5113] close(3) = 0 [pid 5113] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5113] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5113] memfd_create("syzkaller", 0) = 4 [pid 5113] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5113] 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 5113] munmap(0x7f3d54b16000, 262144) = 0 [pid 5113] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5113] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5113] close(4) = 0 [pid 5113] mkdir("./file1", 0777) = 0 [pid 5113] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5113] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5113] chdir("./file1") = 0 [pid 5113] ioctl(5, LOOP_CLR_FD) = 0 [pid 5113] close(5) = 0 [pid 5113] 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 5113] creat("./file1", 000) = 5 [pid 5113] exit_group(0) = ? [pid 5113] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5113, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./37", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./37/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 77.742185][ T5113] loop0: detected capacity change from 0 to 512 [ 77.755075][ T5113] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 77.776606][ T5113] EXT4-fs (loop0): 1 truncate cleaned up unlink("./37/binderfs") = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5115 ./strace-static-x86_64: Process 5115 attached [pid 5115] set_robust_list(0x555555fb0660, 24) = 0 [pid 5115] chdir("./38") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5115] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./38/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/binderfs") = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [ 77.898422][ T5115] loop0: detected capacity change from 0 to 512 [ 77.910798][ T5115] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 77.927025][ T5115] EXT4-fs (loop0): 1 truncate cleaned up getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5117 attached , child_tidptr=0x555555fb0650) = 5117 [pid 5117] set_robust_list(0x555555fb0660, 24) = 0 [pid 5117] chdir("./39") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5117] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./39/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/binderfs") = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./39") = 0 [ 78.027088][ T5117] loop0: detected capacity change from 0 to 512 [ 78.037235][ T5117] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.054998][ T5117] EXT4-fs (loop0): 1 truncate cleaned up 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 5119 attached , child_tidptr=0x555555fb0650) = 5119 [pid 5119] set_robust_list(0x555555fb0660, 24) = 0 [pid 5119] chdir("./40") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5119] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 [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 */} --- umount2("./40", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./40/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/binderfs") = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 78.133193][ T5119] loop0: detected capacity change from 0 to 512 [ 78.143160][ T5119] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.159319][ T5119] EXT4-fs (loop0): 1 truncate cleaned up 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5121 attached , child_tidptr=0x555555fb0650) = 5121 [pid 5121] set_robust_list(0x555555fb0660, 24) = 0 [pid 5121] chdir("./41") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5121] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./41", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./41/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/binderfs") = 0 umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 78.246013][ T5121] loop0: detected capacity change from 0 to 512 [ 78.257189][ T5121] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.274541][ T5121] EXT4-fs (loop0): 1 truncate cleaned up umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5123 attached , child_tidptr=0x555555fb0650) = 5123 [pid 5123] set_robust_list(0x555555fb0660, 24) = 0 [pid 5123] chdir("./42") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5123] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=1 /* 0.01 s */} --- umount2("./42", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./42/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/binderfs") = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 78.375097][ T5123] loop0: detected capacity change from 0 to 512 [ 78.385584][ T5123] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.402735][ T5123] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5125 ./strace-static-x86_64: Process 5125 attached [pid 5125] set_robust_list(0x555555fb0660, 24) = 0 [pid 5125] chdir("./43") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5125] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./43/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/binderfs") = 0 umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 78.480534][ T5125] loop0: detected capacity change from 0 to 512 [ 78.492508][ T5125] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.509058][ T5125] EXT4-fs (loop0): 1 truncate cleaned up umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5127 attached , child_tidptr=0x555555fb0650) = 5127 [pid 5127] set_robust_list(0x555555fb0660, 24) = 0 [pid 5127] chdir("./44") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5127] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./44", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./44/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/binderfs") = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./44/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = 0 close(3) = 0 [ 78.612077][ T5127] loop0: detected capacity change from 0 to 512 [ 78.622295][ T5127] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.638571][ T5127] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5129 ./strace-static-x86_64: Process 5129 attached [pid 5129] set_robust_list(0x555555fb0660, 24) = 0 [pid 5129] chdir("./45") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5129] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=6 /* 0.06 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./45/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/binderfs") = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file1") = 0 [ 78.725611][ T5129] loop0: detected capacity change from 0 to 512 [ 78.735492][ T5129] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.751393][ T5129] EXT4-fs (loop0): 1 truncate cleaned up getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5131 attached , child_tidptr=0x555555fb0650) = 5131 [pid 5131] set_robust_list(0x555555fb0660, 24) = 0 [pid 5131] chdir("./46") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5131] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./46", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./46/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/binderfs") = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 78.835894][ T5131] loop0: detected capacity change from 0 to 512 [ 78.847157][ T5131] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.864080][ T5131] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./46/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5133 attached , child_tidptr=0x555555fb0650) = 5133 [pid 5133] set_robust_list(0x555555fb0660, 24) = 0 [pid 5133] chdir("./47") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5133] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./47", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./47/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/binderfs") = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 78.940679][ T5133] loop0: detected capacity change from 0 to 512 [ 78.951960][ T5133] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 78.968101][ T5133] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./47/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5135 attached , child_tidptr=0x555555fb0650) = 5135 [pid 5135] set_robust_list(0x555555fb0660, 24) = 0 [pid 5135] chdir("./48") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5135] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./48/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/binderfs") = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [ 79.063384][ T5135] loop0: detected capacity change from 0 to 512 [ 79.074014][ T5135] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.090223][ T5135] EXT4-fs (loop0): 1 truncate cleaned up getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5137 attached , child_tidptr=0x555555fb0650) = 5137 [pid 5137] set_robust_list(0x555555fb0660, 24) = 0 [pid 5137] chdir("./49") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5137] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./49", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./49/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/binderfs") = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 79.186588][ T5137] loop0: detected capacity change from 0 to 512 [ 79.199487][ T5137] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.215913][ T5137] EXT4-fs (loop0): 1 truncate cleaned up openat(AT_FDCWD, "./49/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5139 attached [pid 5139] set_robust_list(0x555555fb0660, 24) = 0 [pid 5139] chdir("./50") = 0 [pid 5139] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5139 [pid 5139] <... prctl resumed>) = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5139] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./50/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/binderfs") = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./50/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./50") = 0 [ 79.302057][ T5139] loop0: detected capacity change from 0 to 512 [ 79.312298][ T5139] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.328598][ T5139] 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 5141 attached , child_tidptr=0x555555fb0650) = 5141 [pid 5141] set_robust_list(0x555555fb0660, 24) = 0 [pid 5141] chdir("./51") = 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 [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 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=3 /* 0.03 s */} --- umount2("./51", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./51/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/binderfs") = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./51/file1") = 0 [ 79.414137][ T5141] loop0: detected capacity change from 0 to 512 [ 79.423886][ T5141] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.439724][ T5141] EXT4-fs (loop0): 1 truncate cleaned up getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5143 attached , child_tidptr=0x555555fb0650) = 5143 [pid 5143] set_robust_list(0x555555fb0660, 24) = 0 [pid 5143] chdir("./52") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5143] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=2 /* 0.02 s */} --- umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./52/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/binderfs") = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./52/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./52") = 0 mkdir("./53", 0777) = 0 [ 79.522062][ T5143] loop0: detected capacity change from 0 to 512 [ 79.532479][ T5143] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.548790][ T5143] EXT4-fs (loop0): 1 truncate cleaned up 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=0x555555fb0650) = 5145 [pid 5145] set_robust_list(0x555555fb0660, 24) = 0 [pid 5145] chdir("./53") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5145] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./53", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./53/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./53/binderfs") = 0 [ 79.623706][ T5145] loop0: detected capacity change from 0 to 512 [ 79.633536][ T5145] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.649623][ T5145] EXT4-fs (loop0): 1 truncate cleaned up umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./53/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5147 attached , child_tidptr=0x555555fb0650) = 5147 [pid 5147] set_robust_list(0x555555fb0660, 24) = 0 [pid 5147] chdir("./54") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5147] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./54", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./54/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./54/binderfs") = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 [ 79.752130][ T5147] loop0: detected capacity change from 0 to 512 [ 79.763483][ T5147] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.779705][ T5147] EXT4-fs (loop0): 1 truncate cleaned up getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./54/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5149 attached , child_tidptr=0x555555fb0650) = 5149 [pid 5149] set_robust_list(0x555555fb0660, 24) = 0 [pid 5149] chdir("./55") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5149] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=2 /* 0.02 s */} --- umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./55/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./55/binderfs") = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./55/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 [ 79.875451][ T5149] loop0: detected capacity change from 0 to 512 [ 79.886499][ T5149] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 79.902014][ T5149] EXT4-fs (loop0): 1 truncate cleaned up 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=0x555555fb0650) = 5151 ./strace-static-x86_64: Process 5151 attached [pid 5151] set_robust_list(0x555555fb0660, 24) = 0 [pid 5151] chdir("./56") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5151] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./56", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./56/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./56/binderfs") = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./56/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 [ 79.984377][ T5151] loop0: detected capacity change from 0 to 512 [ 79.995237][ T5151] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 80.011307][ T5151] EXT4-fs (loop0): 1 truncate cleaned up 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, child_tidptr=0x555555fb0650) = 5153 ./strace-static-x86_64: Process 5153 attached [pid 5153] set_robust_list(0x555555fb0660, 24) = 0 [pid 5153] chdir("./57") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5153] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./57", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./57/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./57/binderfs") = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 80.105064][ T5153] loop0: detected capacity change from 0 to 512 [ 80.115812][ T5153] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 80.131724][ T5153] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./57/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5155 ./strace-static-x86_64: Process 5155 attached [pid 5155] set_robust_list(0x555555fb0660, 24) = 0 [pid 5155] chdir("./58") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5155] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- umount2("./58", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./58/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./58/binderfs") = 0 umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 80.212497][ T5155] loop0: detected capacity change from 0 to 512 [ 80.222565][ T5155] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 80.239002][ T5155] EXT4-fs (loop0): 1 truncate cleaned up umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./58/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5157 attached , child_tidptr=0x555555fb0650) = 5157 [pid 5157] set_robust_list(0x555555fb0660, 24) = 0 [pid 5157] chdir("./59") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5157] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- umount2("./59", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./59/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./59/binderfs") = 0 [ 80.327497][ T5157] loop0: detected capacity change from 0 to 512 [ 80.337736][ T5157] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 80.356508][ T5157] EXT4-fs (loop0): 1 truncate cleaned up umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./59/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5159 attached , child_tidptr=0x555555fb0650) = 5159 [pid 5159] set_robust_list(0x555555fb0660, 24) = 0 [pid 5159] chdir("./60") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5159] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./60/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./60/binderfs") = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./60/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./60") = 0 [ 80.451425][ T5159] loop0: detected capacity change from 0 to 512 [ 80.467166][ T5159] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 80.484136][ T5159] EXT4-fs (loop0): 1 truncate cleaned up 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./strace-static-x86_64: Process 5161 attached [pid 5161] set_robust_list(0x555555fb0660, 24) = 0 [pid 5161] chdir("./61") = 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 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5161 [pid 5161] <... openat resumed>) = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5161] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 [ 80.560778][ T5161] loop0: detected capacity change from 0 to 512 [ 80.571021][ T5161] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 80.587156][ T5161] EXT4-fs (loop0): 1 truncate cleaned up [ 80.608085][ T5161] [ 80.610499][ T5161] ====================================================== [ 80.617621][ T5161] WARNING: possible circular locking dependency detected [ 80.624653][ T5161] 6.6.0-rc3-syzkaller-00165-g3b517966c561 #0 Not tainted [ 80.631668][ T5161] ------------------------------------------------------ [ 80.638690][ T5161] syz-executor233/5161 is trying to acquire lock: [ 80.645203][ T5161] ffff88807704e800 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x409/0x5d0 [ 80.655607][ T5161] [ 80.655607][ T5161] but task is already holding lock: [ 80.662971][ T5161] ffff88807704f088 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x14c0/0x1bb0 [ 80.672319][ T5161] [ 80.672319][ T5161] which lock already depends on the new lock. [ 80.672319][ T5161] [ 80.682731][ T5161] [ 80.682731][ T5161] the existing dependency chain (in reverse order) is: [ 80.691863][ T5161] [ 80.691863][ T5161] -> #1 (&ei->i_data_sem/3){++++}-{3:3}: [ 80.699869][ T5161] down_write+0x3a/0x50 [ 80.704571][ T5161] ext4_xattr_set_entry+0x344a/0x3f90 [ 80.710494][ T5161] ext4_xattr_ibody_set+0x121/0x330 [ 80.716252][ T5161] ext4_xattr_set_handle+0xba5/0x1570 [ 80.722165][ T5161] ext4_xattr_set+0x241/0x3d0 [ 80.727376][ T5161] __vfs_setxattr+0x460/0x4a0 [ 80.732590][ T5161] __vfs_setxattr_noperm+0x12e/0x5e0 [ 80.738415][ T5161] vfs_setxattr+0x221/0x420 [ 80.743486][ T5161] setxattr+0x25d/0x2f0 [ 80.748179][ T5161] path_setxattr+0x1c0/0x2a0 [ 80.753307][ T5161] __x64_sys_setxattr+0xbb/0xd0 [ 80.758700][ T5161] do_syscall_64+0x41/0xc0 [ 80.763646][ T5161] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 80.770163][ T5161] [ 80.770163][ T5161] -> #0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}: [ 80.778471][ T5161] __lock_acquire+0x39ff/0x7f70 [ 80.783861][ T5161] lock_acquire+0x1e3/0x520 [ 80.788906][ T5161] down_write+0x3a/0x50 [ 80.793609][ T5161] ext4_xattr_inode_iget+0x409/0x5d0 [ 80.799704][ T5161] ext4_xattr_inode_get+0x164/0x430 [ 80.805443][ T5161] ext4_expand_extra_isize_ea+0xf21/0x1ce0 [ 80.811953][ T5161] __ext4_expand_extra_isize+0x2f7/0x3d0 [ 80.818119][ T5161] __ext4_mark_inode_dirty+0x53e/0x870 [ 80.824119][ T5161] ext4_setattr+0x1553/0x1bb0 [ 80.829321][ T5161] notify_change+0xb99/0xe60 [ 80.834456][ T5161] do_truncate+0x220/0x300 [ 80.839408][ T5161] path_openat+0x2959/0x3180 [ 80.844628][ T5161] do_filp_open+0x234/0x490 [ 80.849664][ T5161] do_sys_openat2+0x13e/0x1d0 [ 80.854895][ T5161] __x64_sys_creat+0x123/0x160 [ 80.860196][ T5161] do_syscall_64+0x41/0xc0 [ 80.865152][ T5161] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 80.871577][ T5161] [ 80.871577][ T5161] other info that might help us debug this: [ 80.871577][ T5161] [ 80.881812][ T5161] Possible unsafe locking scenario: [ 80.881812][ T5161] [ 80.889261][ T5161] CPU0 CPU1 [ 80.894626][ T5161] ---- ---- [ 80.899994][ T5161] lock(&ei->i_data_sem/3); [ 80.904601][ T5161] lock(&ea_inode->i_rwsem#7/1); [ 80.912159][ T5161] lock(&ei->i_data_sem/3); [ 80.919283][ T5161] lock(&ea_inode->i_rwsem#7/1); [ 80.924326][ T5161] [ 80.924326][ T5161] *** DEADLOCK *** [ 80.924326][ T5161] [ 80.932487][ T5161] 5 locks held by syz-executor233/5161: [ 80.938124][ T5161] #0: ffff88807bbb8410 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 80.947296][ T5161] #1: ffff88807704f200 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0x20c/0x300 [ 80.957631][ T5161] #2: ffff88807704f3a0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xf31/0x1bb0 [ 80.967829][ T5161] #3: ffff88807704f088 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x14c0/0x1bb0 [ 80.977680][ T5161] #4: ffff88807704eec8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a5/0x870 [ 80.987967][ T5161] [ 80.987967][ T5161] stack backtrace: [ 80.993866][ T5161] CPU: 1 PID: 5161 Comm: syz-executor233 Not tainted 6.6.0-rc3-syzkaller-00165-g3b517966c561 #0 [ 81.004287][ T5161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 [ 81.014375][ T5161] Call Trace: [ 81.017774][ T5161] [ 81.020720][ T5161] dump_stack_lvl+0x1e7/0x2d0 [ 81.025496][ T5161] ? nf_tcp_handle_invalid+0x650/0x650 [ 81.030964][ T5161] ? print_circular_bug+0x12b/0x1a0 [ 81.036175][ T5161] check_noncircular+0x375/0x4a0 [ 81.041149][ T5161] ? verify_lock_unused+0x140/0x140 [ 81.046357][ T5161] ? print_deadlock_bug+0x600/0x600 [ 81.051564][ T5161] ? lockdep_lock+0x123/0x2b0 [ 81.056254][ T5161] __lock_acquire+0x39ff/0x7f70 [ 81.061127][ T5161] ? verify_lock_unused+0x140/0x140 [ 81.066343][ T5161] ? __might_sleep+0xc0/0xc0 [ 81.070952][ T5161] ? look_up_lock_class+0x77/0x140 [ 81.076098][ T5161] ? register_lock_class+0x104/0x990 [ 81.081399][ T5161] lock_acquire+0x1e3/0x520 [ 81.085999][ T5161] ? ext4_xattr_inode_iget+0x409/0x5d0 [ 81.091466][ T5161] ? read_lock_is_recursive+0x20/0x20 [ 81.096845][ T5161] ? __might_sleep+0xc0/0xc0 [ 81.101447][ T5161] ? lockdep_softirqs_off+0x420/0x420 [ 81.106835][ T5161] down_write+0x3a/0x50 [ 81.111042][ T5161] ? ext4_xattr_inode_iget+0x409/0x5d0 [ 81.116593][ T5161] ext4_xattr_inode_iget+0x409/0x5d0 [ 81.121888][ T5161] ext4_xattr_inode_get+0x164/0x430 [ 81.127190][ T5161] ? ext4_xattr_ibody_get+0x740/0x740 [ 81.132582][ T5161] ? __kmalloc_node+0xe8/0x230 [ 81.137361][ T5161] ext4_expand_extra_isize_ea+0xf21/0x1ce0 [ 81.143186][ T5161] ? ext4_xattr_set+0x3d0/0x3d0 [ 81.148049][ T5161] ? down_write_trylock+0x208/0x3a0 [ 81.153264][ T5161] ? __ext4_mark_inode_dirty+0x4a5/0x870 [ 81.158912][ T5161] ? dquot_initialize_needed+0x12c/0x320 [ 81.164550][ T5161] __ext4_expand_extra_isize+0x2f7/0x3d0 [ 81.170425][ T5161] __ext4_mark_inode_dirty+0x53e/0x870 [ 81.175907][ T5161] ? ext4_blocks_for_truncate+0x270/0x270 [ 81.181641][ T5161] ? __down_write_common+0x161/0x200 [ 81.186937][ T5161] ? clear_nonspinnable+0x60/0x60 [ 81.191968][ T5161] ? ext4_fc_track_range+0xf7/0xa60 [ 81.197178][ T5161] ? __ext4_journal_start_sb+0x26b/0x5a0 [ 81.202822][ T5161] ext4_setattr+0x1553/0x1bb0 [ 81.207513][ T5161] ? ext4_write_inode+0x6f0/0x6f0 [ 81.212549][ T5161] notify_change+0xb99/0xe60 [ 81.217165][ T5161] do_truncate+0x220/0x300 [ 81.221595][ T5161] ? put_page_bootmem+0x2e0/0x2e0 [ 81.226634][ T5161] ? ima_bprm_check+0x2b0/0x2b0 [ 81.231672][ T5161] path_openat+0x2959/0x3180 [ 81.236449][ T5161] ? getname_flags+0xbc/0x4e0 [ 81.241136][ T5161] ? do_filp_open+0x490/0x490 [ 81.245828][ T5161] do_filp_open+0x234/0x490 [ 81.250360][ T5161] ? vfs_tmpfile+0x4b0/0x4b0 [ 81.254964][ T5161] ? _raw_spin_unlock+0x28/0x40 [ 81.259838][ T5161] ? alloc_fd+0x59c/0x640 [ 81.264188][ T5161] do_sys_openat2+0x13e/0x1d0 [ 81.268884][ T5161] ? do_sys_open+0x230/0x230 [ 81.273483][ T5161] ? _raw_spin_unlock_irq+0x2e/0x50 [ 81.278689][ T5161] ? ptrace_notify+0x278/0x380 [ 81.283490][ T5161] __x64_sys_creat+0x123/0x160 [ 81.288276][ T5161] ? __x64_compat_sys_openat+0x290/0x290 [ 81.293932][ T5161] ? syscall_enter_from_user_mode+0x32/0x230 [ 81.299924][ T5161] ? syscall_enter_from_user_mode+0x8c/0x230 [ 81.305912][ T5161] do_syscall_64+0x41/0xc0 [ 81.310332][ T5161] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 81.316230][ T5161] RIP: 0033:0x7f3d5cf55229 [ 81.320653][ T5161] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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 b8 ff ff ff f7 d8 64 89 01 48 [ 81.341307][ T5161] RSP: 002b:00007ffcc35f7c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 81.349798][ T5161] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f3d5cf55229 [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=6 /* 0.06 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./61/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./61/binderfs") = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./61/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5163 attached , child_tidptr=0x555555fb0650) = 5163 [pid 5163] set_robust_list(0x555555fb0660, 24) = 0 [pid 5163] chdir("./62") = 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) = 0x7f3d54b16000 [ 81.357775][ T5161] RDX: 00007f3d5cf55229 RSI: 0000000000000000 RDI: 0000000020000040 [ 81.365764][ T5161] RBP: 0000000000000000 R08: 00007ffcc35f7c60 R09: 00007ffcc35f7c60 [ 81.373780][ T5161] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc35f7c4c [ 81.381765][ T5161] R13: 000000000000003d R14: 431bde82d7b634db R15: 00007ffcc35f7c80 [ 81.389761][ T5161] [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(0x7f3d54b16000, 262144) = 0 [pid 5163] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./62/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./62/binderfs") = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./62/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./62") = 0 mkdir("./63", 0777) = 0 [ 81.451762][ T5163] loop0: detected capacity change from 0 to 512 [ 81.462310][ T5163] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 81.477423][ T5163] EXT4-fs (loop0): 1 truncate cleaned up 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 5165 attached , child_tidptr=0x555555fb0650) = 5165 [pid 5165] set_robust_list(0x555555fb0660, 24) = 0 [pid 5165] chdir("./63") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5165] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=1 /* 0.01 s */} --- umount2("./63", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./63/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./63/binderfs") = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./63/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 81.554467][ T5165] loop0: detected capacity change from 0 to 512 [ 81.564065][ T5165] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 81.579505][ T5165] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5167 ./strace-static-x86_64: Process 5167 attached [pid 5167] set_robust_list(0x555555fb0660, 24) = 0 [pid 5167] chdir("./64") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5167] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./64", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./64/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./64/binderfs") = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./64/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5170 ./strace-static-x86_64: Process 5170 attached [ 81.655306][ T5167] loop0: detected capacity change from 0 to 512 [ 81.663937][ T5167] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 81.679213][ T5167] EXT4-fs (loop0): 1 truncate cleaned up [pid 5170] set_robust_list(0x555555fb0660, 24) = 0 [pid 5170] chdir("./65") = 0 [pid 5170] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5170] setpgid(0, 0) = 0 [pid 5170] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5170] write(3, "1000", 4) = 4 [pid 5170] close(3) = 0 [pid 5170] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5170] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5170] memfd_create("syzkaller", 0) = 4 [pid 5170] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5170] 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 5170] munmap(0x7f3d54b16000, 262144) = 0 [pid 5170] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5170] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5170] close(4) = 0 [pid 5170] mkdir("./file1", 0777) = 0 [pid 5170] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5170] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5170] chdir("./file1") = 0 [pid 5170] ioctl(5, LOOP_CLR_FD) = 0 [pid 5170] close(5) = 0 [pid 5170] 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 5170] creat("./file1", 000) = 5 [pid 5170] exit_group(0) = ? [pid 5170] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5170, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./65", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./65/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./65/binderfs") = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./65/file1") = 0 [ 81.758032][ T5170] loop0: detected capacity change from 0 to 512 [ 81.771174][ T5170] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 81.786917][ T5170] EXT4-fs (loop0): 1 truncate cleaned up getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5173 ./strace-static-x86_64: Process 5173 attached [pid 5173] set_robust_list(0x555555fb0660, 24) = 0 [pid 5173] chdir("./66") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5173] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./66", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./66/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./66/binderfs") = 0 [ 81.871867][ T5173] loop0: detected capacity change from 0 to 512 [ 81.893255][ T5173] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 81.911802][ T5173] EXT4-fs (loop0): 1 truncate cleaned up umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./66/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5175 attached , child_tidptr=0x555555fb0650) = 5175 [pid 5175] set_robust_list(0x555555fb0660, 24) = 0 [pid 5175] chdir("./67") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5175] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./67", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./67/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./67/binderfs") = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 81.982128][ T5175] loop0: detected capacity change from 0 to 512 [ 81.994503][ T5175] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.010091][ T5175] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./67/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5177 attached , child_tidptr=0x555555fb0650) = 5177 [pid 5177] set_robust_list(0x555555fb0660, 24) = 0 [pid 5177] chdir("./68") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5177] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- umount2("./68", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./68/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./68/binderfs") = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./68/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = -1 ENXIO (No such device or address) close(3) = 0 [ 82.091749][ T5177] loop0: detected capacity change from 0 to 512 [ 82.100756][ T5177] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.115930][ T5177] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5179 ./strace-static-x86_64: Process 5179 attached [pid 5179] set_robust_list(0x555555fb0660, 24) = 0 [pid 5179] chdir("./69") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5179] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./69", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./69/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./69/binderfs") = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./69/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5181 attached , child_tidptr=0x555555fb0650) = 5181 [pid 5181] set_robust_list(0x555555fb0660, 24) = 0 [pid 5181] chdir("./70") = 0 [pid 5181] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 82.188898][ T5179] loop0: detected capacity change from 0 to 512 [ 82.198902][ T5179] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.214102][ T5179] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5181] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./70/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./70/binderfs") = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./70/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5183 attached , child_tidptr=0x555555fb0650) = 5183 [pid 5183] set_robust_list(0x555555fb0660, 24) = 0 [pid 5183] chdir("./71") = 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) = 0x7f3d54b16000 [ 82.286027][ T5181] loop0: detected capacity change from 0 to 512 [ 82.297111][ T5181] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.311726][ T5181] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5183] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./71", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./71/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./71/binderfs") = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./71/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5185 attached , child_tidptr=0x555555fb0650) = 5185 [pid 5185] set_robust_list(0x555555fb0660, 24) = 0 [pid 5185] chdir("./72") = 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 [ 82.374217][ T5183] loop0: detected capacity change from 0 to 512 [ 82.386871][ T5183] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.401056][ T5183] EXT4-fs (loop0): 1 truncate cleaned up [pid 5185] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [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(0x7f3d54b16000, 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 */} --- umount2("./72", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./72", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./72/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./72/binderfs") = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./72/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 82.463097][ T5185] loop0: detected capacity change from 0 to 512 [ 82.472015][ T5185] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.487299][ T5185] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5187 attached , child_tidptr=0x555555fb0650) = 5187 [pid 5187] set_robust_list(0x555555fb0660, 24) = 0 [pid 5187] chdir("./73") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5187] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=2 /* 0.02 s */} --- umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./73/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./73/binderfs") = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./73/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5189 attached , child_tidptr=0x555555fb0650) = 5189 [pid 5189] set_robust_list(0x555555fb0660, 24) = 0 [pid 5189] chdir("./74") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5189] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 82.562153][ T5187] loop0: detected capacity change from 0 to 512 [ 82.571224][ T5187] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.586053][ 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=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./74/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./74/binderfs") = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./74/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) [ 82.637693][ T5189] loop0: detected capacity change from 0 to 512 [ 82.647913][ T5189] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.663027][ T5189] EXT4-fs (loop0): 1 truncate cleaned up close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5191 ./strace-static-x86_64: Process 5191 attached [pid 5191] set_robust_list(0x555555fb0660, 24) = 0 [pid 5191] chdir("./75") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5191] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./75/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./75/binderfs") = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./75/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5193 attached , child_tidptr=0x555555fb0650) = 5193 [pid 5193] set_robust_list(0x555555fb0660, 24) = 0 [pid 5193] chdir("./76") = 0 [pid 5193] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 82.740176][ T5191] loop0: detected capacity change from 0 to 512 [ 82.749177][ T5191] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.764316][ T5191] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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 [pid 5193] munmap(0x7f3d54b16000, 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=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./76/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./76/binderfs") = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./76/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 82.834071][ T5193] loop0: detected capacity change from 0 to 512 [ 82.843498][ T5193] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.859036][ T5193] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5195 attached , child_tidptr=0x555555fb0650) = 5195 [pid 5195] set_robust_list(0x555555fb0660, 24) = 0 [pid 5195] chdir("./77") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5195] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./77/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./77/binderfs") = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./77/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 [ 82.921790][ T5195] loop0: detected capacity change from 0 to 512 [ 82.940811][ T5195] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 82.955976][ T5195] EXT4-fs (loop0): 1 truncate cleaned up 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=0x555555fb0650) = 5197 ./strace-static-x86_64: Process 5197 attached [pid 5197] set_robust_list(0x555555fb0660, 24) = 0 [pid 5197] chdir("./78") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5197] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./78/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./78/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./78/binderfs") = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./78/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./78/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./78") = 0 mkdir("./79", 0777) = 0 [ 83.030870][ T5197] loop0: detected capacity change from 0 to 512 [ 83.039718][ T5197] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.054337][ T5197] EXT4-fs (loop0): 1 truncate cleaned up 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 5199 attached , child_tidptr=0x555555fb0650) = 5199 [pid 5199] set_robust_list(0x555555fb0660, 24) = 0 [pid 5199] chdir("./79") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5199] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./79", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./79/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./79/binderfs") = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./79/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5201 attached , child_tidptr=0x555555fb0650) = 5201 [pid 5201] set_robust_list(0x555555fb0660, 24) = 0 [pid 5201] chdir("./80") = 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) = 0x7f3d54b16000 [ 83.127516][ T5199] loop0: detected capacity change from 0 to 512 [ 83.136667][ T5199] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.151676][ T5199] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [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=3 /* 0.03 s */} --- umount2("./80", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./80/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./80/binderfs") = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./80/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5203 attached [pid 5203] set_robust_list(0x555555fb0660, 24) = 0 [pid 5203] chdir("./81") = 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 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5203 [pid 5203] write(3, "1000", 4) = 4 [pid 5203] close(3) = 0 [ 83.210988][ T5201] loop0: detected capacity change from 0 to 512 [ 83.220228][ T5201] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.236466][ T5201] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5203] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./81", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./81/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./81/binderfs") = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./81/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5205 attached , child_tidptr=0x555555fb0650) = 5205 [pid 5205] set_robust_list(0x555555fb0660, 24) = 0 [ 83.298421][ T5203] loop0: detected capacity change from 0 to 512 [ 83.307830][ T5203] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.324182][ T5203] EXT4-fs (loop0): 1 truncate cleaned up [pid 5205] chdir("./82") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 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=3 /* 0.03 s */} --- umount2("./82", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./82/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./82/binderfs") = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./82/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5207 attached , child_tidptr=0x555555fb0650) = 5207 [pid 5207] set_robust_list(0x555555fb0660, 24) = 0 [pid 5207] chdir("./83") = 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) = 0x7f3d54b16000 [ 83.391810][ T5205] loop0: detected capacity change from 0 to 512 [ 83.401600][ T5205] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.416426][ T5205] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5207] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./83", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./83/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./83/binderfs") = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./83/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5209 ./strace-static-x86_64: Process 5209 attached [pid 5209] set_robust_list(0x555555fb0660, 24) = 0 [pid 5209] chdir("./84") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5209] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 83.478366][ T5207] loop0: detected capacity change from 0 to 512 [ 83.488055][ T5207] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.503594][ 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=3 /* 0.03 s */} --- umount2("./84", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./84/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./84/binderfs") = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./84/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) [ 83.556135][ T5209] loop0: detected capacity change from 0 to 512 [ 83.568029][ T5209] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.585288][ T5209] EXT4-fs (loop0): 1 truncate cleaned up close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5211 ./strace-static-x86_64: Process 5211 attached [pid 5211] set_robust_list(0x555555fb0660, 24) = 0 [pid 5211] chdir("./85") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5211] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./85", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./85/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./85/binderfs") = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./85/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5213 attached , child_tidptr=0x555555fb0650) = 5213 [pid 5213] set_robust_list(0x555555fb0660, 24) = 0 [pid 5213] chdir("./86") = 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 [ 83.664454][ T5211] loop0: detected capacity change from 0 to 512 [ 83.673649][ T5211] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.688184][ T5211] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5213] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./86", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./86/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./86/binderfs") = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./86/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5215 ./strace-static-x86_64: Process 5215 attached [pid 5215] set_robust_list(0x555555fb0660, 24) = 0 [pid 5215] chdir("./87") = 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) = 0x7f3d54b16000 [ 83.755666][ T5213] loop0: detected capacity change from 0 to 512 [ 83.764420][ T5213] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.779820][ T5213] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5215] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./87/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./87/binderfs") = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./87/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5217 ./strace-static-x86_64: Process 5217 attached [pid 5217] set_robust_list(0x555555fb0660, 24) = 0 [pid 5217] chdir("./88") = 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 [ 83.836934][ T5215] loop0: detected capacity change from 0 to 512 [ 83.845958][ T5215] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.860917][ T5215] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5217] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./88", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./88/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./88/binderfs") = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./88/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5219 attached , child_tidptr=0x555555fb0650) = 5219 [pid 5219] set_robust_list(0x555555fb0660, 24) = 0 [pid 5219] chdir("./89") = 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 [ 83.929750][ T5217] loop0: detected capacity change from 0 to 512 [ 83.941743][ T5217] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 83.956638][ T5217] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5219] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./89", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./89/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./89/binderfs") = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./89/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5221 attached [pid 5221] set_robust_list(0x555555fb0660, 24) = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5221 [pid 5221] chdir("./90") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [ 84.027623][ T5219] loop0: detected capacity change from 0 to 512 [ 84.039675][ T5219] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.054503][ T5219] EXT4-fs (loop0): 1 truncate cleaned up [pid 5221] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./90/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./90/binderfs") = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./90/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 84.109848][ T5221] loop0: detected capacity change from 0 to 512 [ 84.119100][ T5221] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.136374][ T5221] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5223 ./strace-static-x86_64: Process 5223 attached [pid 5223] set_robust_list(0x555555fb0660, 24) = 0 [pid 5223] chdir("./91") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- umount2("./91", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./91/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./91/binderfs") = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./91/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5225 attached , child_tidptr=0x555555fb0650) = 5225 [pid 5225] set_robust_list(0x555555fb0660, 24) = 0 [pid 5225] chdir("./92") = 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) = 0x7f3d54b16000 [ 84.196342][ T5223] loop0: detected capacity change from 0 to 512 [ 84.205283][ T5223] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.221177][ T5223] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5225] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- umount2("./92", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./92/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./92/binderfs") = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./92/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5227 ./strace-static-x86_64: Process 5227 attached [ 84.284123][ T5225] loop0: detected capacity change from 0 to 512 [ 84.295955][ T5225] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.311493][ T5225] EXT4-fs (loop0): 1 truncate cleaned up [pid 5227] set_robust_list(0x555555fb0660, 24) = 0 [pid 5227] chdir("./93") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5227] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./93/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./93/binderfs") = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./93/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5229 ./strace-static-x86_64: Process 5229 attached [pid 5229] set_robust_list(0x555555fb0660, 24) = 0 [pid 5229] chdir("./94") = 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 [ 84.387880][ T5227] loop0: detected capacity change from 0 to 512 [ 84.397568][ T5227] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.412866][ T5227] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5229] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./94", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./94/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./94/binderfs") = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./94/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5231 ./strace-static-x86_64: Process 5231 attached [pid 5231] set_robust_list(0x555555fb0660, 24) = 0 [pid 5231] chdir("./95") = 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 [ 84.479122][ T5229] loop0: detected capacity change from 0 to 512 [ 84.488797][ T5229] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.504376][ T5229] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=1 /* 0.01 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./95/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./95/binderfs") = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./95/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5233 ./strace-static-x86_64: Process 5233 attached [pid 5233] set_robust_list(0x555555fb0660, 24) = 0 [pid 5233] chdir("./96") = 0 [pid 5233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5233] setpgid(0, 0) = 0 [ 84.572586][ T5231] loop0: detected capacity change from 0 to 512 [ 84.581796][ T5231] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.606140][ T5231] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./96", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./96", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./96/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./96/binderfs") = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./96/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5235 attached , child_tidptr=0x555555fb0650) = 5235 [pid 5235] set_robust_list(0x555555fb0660, 24) = 0 [pid 5235] chdir("./97") = 0 [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 [ 84.666352][ T5233] loop0: detected capacity change from 0 to 512 [ 84.675465][ T5233] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.690749][ T5233] EXT4-fs (loop0): 1 truncate cleaned up [pid 5235] memfd_create("syzkaller", 0) = 4 [pid 5235] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5235] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./97", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./97/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./97/binderfs") = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./97/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5237 attached [pid 5237] set_robust_list(0x555555fb0660, 24) = 0 [pid 5237] chdir("./98") = 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) = 0x7f3d54b16000 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5237 [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 [ 84.762228][ T5235] loop0: detected capacity change from 0 to 512 [ 84.771540][ T5235] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.787307][ T5235] EXT4-fs (loop0): 1 truncate cleaned up [pid 5237] munmap(0x7f3d54b16000, 262144) = 0 [pid 5237] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=1 /* 0.01 s */} --- umount2("./98", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./98/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./98/binderfs") = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./98/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5239 ./strace-static-x86_64: Process 5239 attached [pid 5239] set_robust_list(0x555555fb0660, 24) = 0 [pid 5239] chdir("./99") = 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) = 0x7f3d54b16000 [ 84.844273][ T5237] loop0: detected capacity change from 0 to 512 [ 84.854326][ T5237] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.869062][ T5237] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5239] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./99", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./99/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./99/binderfs") = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./99/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5241 ./strace-static-x86_64: Process 5241 attached [pid 5241] set_robust_list(0x555555fb0660, 24) = 0 [pid 5241] chdir("./100") = 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 [ 84.931755][ T5239] loop0: detected capacity change from 0 to 512 [ 84.940534][ T5239] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 84.956744][ T5239] EXT4-fs (loop0): 1 truncate cleaned up [pid 5241] memfd_create("syzkaller", 0) = 4 [pid 5241] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5241] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=2 /* 0.02 s */} --- umount2("./100", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./100/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./100/binderfs") = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./100/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 85.017789][ T5241] loop0: detected capacity change from 0 to 512 [ 85.027800][ T5241] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.043132][ T5241] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5243 attached , child_tidptr=0x555555fb0650) = 5243 [pid 5243] set_robust_list(0x555555fb0660, 24) = 0 [pid 5243] chdir("./101") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5243] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./101", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./101/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./101/binderfs") = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./101/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5245 attached , child_tidptr=0x555555fb0650) = 5245 [pid 5245] set_robust_list(0x555555fb0660, 24) = 0 [pid 5245] chdir("./102") = 0 [pid 5245] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5245] setpgid(0, 0) = 0 [pid 5245] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5245] write(3, "1000", 4) = 4 [pid 5245] close(3) = 0 [ 85.087982][ T5243] loop0: detected capacity change from 0 to 512 [ 85.097862][ T5243] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.113929][ T5243] EXT4-fs (loop0): 1 truncate cleaned up [pid 5245] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5245] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5245] memfd_create("syzkaller", 0) = 4 [pid 5245] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5245] 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 5245] munmap(0x7f3d54b16000, 262144) = 0 [pid 5245] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5245] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5245] close(4) = 0 [pid 5245] mkdir("./file1", 0777) = 0 [pid 5245] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5245] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5245] chdir("./file1") = 0 [pid 5245] ioctl(5, LOOP_CLR_FD) = 0 [pid 5245] close(5) = 0 [pid 5245] 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 5245] creat("./file1", 000) = 5 [pid 5245] exit_group(0) = ? [pid 5245] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5245, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./102", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./102/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./102/binderfs") = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./102/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5247 attached , child_tidptr=0x555555fb0650) = 5247 [pid 5247] set_robust_list(0x555555fb0660, 24) = 0 [pid 5247] chdir("./103") = 0 [pid 5247] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5247] setpgid(0, 0) = 0 [pid 5247] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5247] write(3, "1000", 4) = 4 [pid 5247] close(3) = 0 [pid 5247] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5247] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5247] memfd_create("syzkaller", 0) = 4 [pid 5247] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5247] 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 5247] munmap(0x7f3d54b16000, 262144) = 0 [pid 5247] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 85.176601][ T5245] loop0: detected capacity change from 0 to 512 [ 85.186267][ T5245] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.201279][ T5245] EXT4-fs (loop0): 1 truncate cleaned up [pid 5247] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5247] close(4) = 0 [pid 5247] mkdir("./file1", 0777) = 0 [pid 5247] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5247] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5247] chdir("./file1") = 0 [pid 5247] ioctl(5, LOOP_CLR_FD) = 0 [pid 5247] close(5) = 0 [pid 5247] 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 5247] creat("./file1", 000) = 5 [pid 5247] exit_group(0) = ? [pid 5247] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5247, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./103/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./103/binderfs") = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./103/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5249 ./strace-static-x86_64: Process 5249 attached [pid 5249] set_robust_list(0x555555fb0660, 24) = 0 [pid 5249] chdir("./104") = 0 [pid 5249] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5249] setpgid(0, 0) = 0 [pid 5249] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5249] write(3, "1000", 4) = 4 [pid 5249] close(3) = 0 [pid 5249] symlink("/dev/binderfs", "./binderfs") = 0 [ 85.254985][ T5247] loop0: detected capacity change from 0 to 512 [ 85.265999][ T5247] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.280839][ T5247] EXT4-fs (loop0): 1 truncate cleaned up [pid 5249] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5249] memfd_create("syzkaller", 0) = 4 [pid 5249] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5249] 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 5249] munmap(0x7f3d54b16000, 262144) = 0 [pid 5249] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5249] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5249] close(4) = 0 [pid 5249] mkdir("./file1", 0777) = 0 [pid 5249] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5249] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5249] chdir("./file1") = 0 [pid 5249] ioctl(5, LOOP_CLR_FD) = 0 [pid 5249] close(5) = 0 [pid 5249] 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 5249] creat("./file1", 000) = 5 [pid 5249] exit_group(0) = ? [pid 5249] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5249, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./104", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./104/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./104/binderfs") = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./104/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5251 attached , child_tidptr=0x555555fb0650) = 5251 [pid 5251] set_robust_list(0x555555fb0660, 24) = 0 [pid 5251] chdir("./105") = 0 [pid 5251] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5251] setpgid(0, 0) = 0 [pid 5251] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5251] write(3, "1000", 4) = 4 [pid 5251] close(3) = 0 [ 85.343394][ T5249] loop0: detected capacity change from 0 to 512 [ 85.352793][ T5249] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.368347][ T5249] EXT4-fs (loop0): 1 truncate cleaned up [pid 5251] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5251] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5251] memfd_create("syzkaller", 0) = 4 [pid 5251] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5251] 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 5251] munmap(0x7f3d54b16000, 262144) = 0 [pid 5251] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5251] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5251] close(4) = 0 [pid 5251] mkdir("./file1", 0777) = 0 [pid 5251] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5251] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5251] chdir("./file1") = 0 [pid 5251] ioctl(5, LOOP_CLR_FD) = 0 [pid 5251] close(5) = 0 [pid 5251] 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 5251] creat("./file1", 000) = 5 [pid 5251] exit_group(0) = ? [pid 5251] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5251, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./105", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./105/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./105/binderfs") = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./105/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5253 attached , child_tidptr=0x555555fb0650) = 5253 [pid 5253] set_robust_list(0x555555fb0660, 24) = 0 [pid 5253] chdir("./106") = 0 [pid 5253] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5253] setpgid(0, 0) = 0 [pid 5253] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5253] write(3, "1000", 4) = 4 [pid 5253] close(3) = 0 [pid 5253] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5253] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5253] memfd_create("syzkaller", 0) = 4 [pid 5253] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5253] 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 5253] munmap(0x7f3d54b16000, 262144) = 0 [pid 5253] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 85.432493][ T5251] loop0: detected capacity change from 0 to 512 [ 85.443339][ T5251] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.458288][ T5251] EXT4-fs (loop0): 1 truncate cleaned up [pid 5253] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5253] close(4) = 0 [pid 5253] mkdir("./file1", 0777) = 0 [pid 5253] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5253] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5253] chdir("./file1") = 0 [pid 5253] ioctl(5, LOOP_CLR_FD) = 0 [pid 5253] close(5) = 0 [pid 5253] 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 5253] creat("./file1", 000) = 5 [pid 5253] exit_group(0) = ? [pid 5253] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5253, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./106/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./106/binderfs") = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./106/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5255 ./strace-static-x86_64: Process 5255 attached [pid 5255] set_robust_list(0x555555fb0660, 24) = 0 [pid 5255] chdir("./107") = 0 [pid 5255] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5255] setpgid(0, 0) = 0 [pid 5255] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5255] write(3, "1000", 4) = 4 [pid 5255] close(3) = 0 [ 85.509175][ T5253] loop0: detected capacity change from 0 to 512 [ 85.521116][ T5253] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.536686][ T5253] EXT4-fs (loop0): 1 truncate cleaned up [pid 5255] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5255] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5255] memfd_create("syzkaller", 0) = 4 [pid 5255] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5255] 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 5255] munmap(0x7f3d54b16000, 262144) = 0 [pid 5255] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5255] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5255] close(4) = 0 [pid 5255] mkdir("./file1", 0777) = 0 [pid 5255] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5255] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5255] chdir("./file1") = 0 [pid 5255] ioctl(5, LOOP_CLR_FD) = 0 [pid 5255] close(5) = 0 [pid 5255] 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 5255] creat("./file1", 000) = 5 [pid 5255] exit_group(0) = ? [pid 5255] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5255, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./107", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./107", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./107/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./107/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./107/binderfs") = 0 umount2("./107/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./107/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./107/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./107/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5257 ./strace-static-x86_64: Process 5257 attached [pid 5257] set_robust_list(0x555555fb0660, 24) = 0 [pid 5257] chdir("./108") = 0 [pid 5257] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5257] setpgid(0, 0) = 0 [pid 5257] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5257] write(3, "1000", 4) = 4 [pid 5257] close(3) = 0 [pid 5257] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5257] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5257] memfd_create("syzkaller", 0) = 4 [ 85.601246][ T5255] loop0: detected capacity change from 0 to 512 [ 85.610185][ T5255] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.625110][ T5255] EXT4-fs (loop0): 1 truncate cleaned up [pid 5257] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5257] 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 5257] munmap(0x7f3d54b16000, 262144) = 0 [pid 5257] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5257] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5257] close(4) = 0 [pid 5257] mkdir("./file1", 0777) = 0 [pid 5257] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5257] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5257] chdir("./file1") = 0 [pid 5257] ioctl(5, LOOP_CLR_FD) = 0 [pid 5257] close(5) = 0 [pid 5257] 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 5257] creat("./file1", 000) = 5 [pid 5257] exit_group(0) = ? [pid 5257] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5257, 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./108/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./108/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./108/binderfs") = 0 umount2("./108/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./108/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./108/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./108/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5259 attached , child_tidptr=0x555555fb0650) = 5259 [pid 5259] set_robust_list(0x555555fb0660, 24) = 0 [pid 5259] chdir("./109") = 0 [pid 5259] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5259] setpgid(0, 0) = 0 [pid 5259] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5259] write(3, "1000", 4) = 4 [pid 5259] close(3) = 0 [pid 5259] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5259] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5259] memfd_create("syzkaller", 0) = 4 [pid 5259] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 85.689745][ T5257] loop0: detected capacity change from 0 to 512 [ 85.699927][ T5257] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.715090][ T5257] EXT4-fs (loop0): 1 truncate cleaned up [pid 5259] 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 5259] munmap(0x7f3d54b16000, 262144) = 0 [pid 5259] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5259] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5259] close(4) = 0 [pid 5259] mkdir("./file1", 0777) = 0 [pid 5259] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5259] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5259] chdir("./file1") = 0 [pid 5259] ioctl(5, LOOP_CLR_FD) = 0 [pid 5259] close(5) = 0 [pid 5259] 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 5259] creat("./file1", 000) = 5 [pid 5259] exit_group(0) = ? [pid 5259] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5259, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./109", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./109", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./109/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./109/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./109/binderfs") = 0 umount2("./109/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./109/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./109/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./109/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5261 attached , child_tidptr=0x555555fb0650) = 5261 [ 85.774993][ T5259] loop0: detected capacity change from 0 to 512 [ 85.783714][ T5259] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.799513][ T5259] EXT4-fs (loop0): 1 truncate cleaned up [pid 5261] set_robust_list(0x555555fb0660, 24) = 0 [pid 5261] chdir("./110") = 0 [pid 5261] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5261] setpgid(0, 0) = 0 [pid 5261] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5261] write(3, "1000", 4) = 4 [pid 5261] close(3) = 0 [pid 5261] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5261] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5261] memfd_create("syzkaller", 0) = 4 [pid 5261] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5261] 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 5261] munmap(0x7f3d54b16000, 262144) = 0 [pid 5261] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5261] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5261] close(4) = 0 [pid 5261] mkdir("./file1", 0777) = 0 [pid 5261] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5261] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5261] chdir("./file1") = 0 [pid 5261] ioctl(5, LOOP_CLR_FD) = 0 [pid 5261] close(5) = 0 [pid 5261] 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 5261] creat("./file1", 000) = 5 [pid 5261] exit_group(0) = ? [pid 5261] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5261, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./110", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./110", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./110/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./110/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./110/binderfs") = 0 umount2("./110/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./110/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./110/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./110/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5263 attached , child_tidptr=0x555555fb0650) = 5263 [pid 5263] set_robust_list(0x555555fb0660, 24) = 0 [pid 5263] chdir("./111") = 0 [pid 5263] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5263] setpgid(0, 0) = 0 [pid 5263] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5263] write(3, "1000", 4) = 4 [pid 5263] close(3) = 0 [pid 5263] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5263] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5263] memfd_create("syzkaller", 0) = 4 [pid 5263] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 85.864432][ T5261] loop0: detected capacity change from 0 to 512 [ 85.873129][ T5261] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.887592][ T5261] EXT4-fs (loop0): 1 truncate cleaned up [pid 5263] 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 5263] munmap(0x7f3d54b16000, 262144) = 0 [pid 5263] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5263] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5263] close(4) = 0 [pid 5263] mkdir("./file1", 0777) = 0 [pid 5263] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5263] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5263] chdir("./file1") = 0 [pid 5263] ioctl(5, LOOP_CLR_FD) = 0 [pid 5263] close(5) = 0 [pid 5263] 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 5263] creat("./file1", 000) = 5 [pid 5263] exit_group(0) = ? [pid 5263] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5263, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./111", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./111", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./111/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./111/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./111/binderfs") = 0 umount2("./111/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./111/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./111/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./111/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) [ 85.950101][ T5263] loop0: detected capacity change from 0 to 512 [ 85.960162][ T5263] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 85.975595][ T5263] EXT4-fs (loop0): 1 truncate cleaned up close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5265 attached [pid 5265] set_robust_list(0x555555fb0660, 24 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5265 [pid 5265] <... set_robust_list resumed>) = 0 [pid 5265] chdir("./112") = 0 [pid 5265] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5265] setpgid(0, 0) = 0 [pid 5265] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5265] write(3, "1000", 4) = 4 [pid 5265] close(3) = 0 [pid 5265] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5265] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5265] memfd_create("syzkaller", 0) = 4 [pid 5265] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5265] 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 5265] munmap(0x7f3d54b16000, 262144) = 0 [pid 5265] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5265] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5265] close(4) = 0 [pid 5265] mkdir("./file1", 0777) = 0 [pid 5265] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5265] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5265] chdir("./file1") = 0 [pid 5265] ioctl(5, LOOP_CLR_FD) = 0 [pid 5265] close(5) = 0 [pid 5265] 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 5265] creat("./file1", 000) = 5 [pid 5265] exit_group(0) = ? [pid 5265] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5265, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./112", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./112", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./112/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./112/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./112/binderfs") = 0 umount2("./112/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./112/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./112/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./112/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5267 attached , child_tidptr=0x555555fb0650) = 5267 [pid 5267] set_robust_list(0x555555fb0660, 24) = 0 [pid 5267] chdir("./113") = 0 [pid 5267] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5267] setpgid(0, 0) = 0 [pid 5267] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5267] write(3, "1000", 4) = 4 [pid 5267] close(3) = 0 [pid 5267] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5267] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5267] memfd_create("syzkaller", 0) = 4 [pid 5267] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5267] 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 5267] munmap(0x7f3d54b16000, 262144) = 0 [pid 5267] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 86.049314][ T5265] loop0: detected capacity change from 0 to 512 [ 86.058318][ T5265] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.073214][ T5265] EXT4-fs (loop0): 1 truncate cleaned up [pid 5267] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5267] close(4) = 0 [pid 5267] mkdir("./file1", 0777) = 0 [pid 5267] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5267] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5267] chdir("./file1") = 0 [pid 5267] ioctl(5, LOOP_CLR_FD) = 0 [pid 5267] close(5) = 0 [pid 5267] 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 5267] creat("./file1", 000) = 5 [pid 5267] exit_group(0) = ? [pid 5267] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5267, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./113/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./113/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./113/binderfs") = 0 umount2("./113/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./113/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./113/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./113/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5269 ./strace-static-x86_64: Process 5269 attached [pid 5269] set_robust_list(0x555555fb0660, 24) = 0 [pid 5269] chdir("./114") = 0 [pid 5269] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5269] setpgid(0, 0) = 0 [pid 5269] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5269] write(3, "1000", 4) = 4 [pid 5269] close(3) = 0 [pid 5269] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5269] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5269] memfd_create("syzkaller", 0) = 4 [pid 5269] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 86.130899][ T5267] loop0: detected capacity change from 0 to 512 [ 86.139803][ T5267] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.155808][ T5267] EXT4-fs (loop0): 1 truncate cleaned up [pid 5269] 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 5269] munmap(0x7f3d54b16000, 262144) = 0 [pid 5269] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5269] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5269] close(4) = 0 [pid 5269] mkdir("./file1", 0777) = 0 [pid 5269] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5269] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5269] chdir("./file1") = 0 [pid 5269] ioctl(5, LOOP_CLR_FD) = 0 [pid 5269] close(5) = 0 [pid 5269] 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 5269] creat("./file1", 000) = 5 [pid 5269] exit_group(0) = ? [pid 5269] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5269, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./114/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./114/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./114/binderfs") = 0 umount2("./114/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./114/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./114/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./114/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./114") = 0 mkdir("./115", 0777) = 0 [ 86.198843][ T5269] loop0: detected capacity change from 0 to 512 [ 86.209171][ T5269] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.227295][ T5269] EXT4-fs (loop0): 1 truncate cleaned up 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 5271 attached , child_tidptr=0x555555fb0650) = 5271 [pid 5271] set_robust_list(0x555555fb0660, 24) = 0 [pid 5271] chdir("./115") = 0 [pid 5271] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5271] setpgid(0, 0) = 0 [pid 5271] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5271] write(3, "1000", 4) = 4 [pid 5271] close(3) = 0 [pid 5271] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5271] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5271] memfd_create("syzkaller", 0) = 4 [pid 5271] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5271] 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 5271] munmap(0x7f3d54b16000, 262144) = 0 [pid 5271] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5271] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5271] close(4) = 0 [pid 5271] mkdir("./file1", 0777) = 0 [pid 5271] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5271] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5271] chdir("./file1") = 0 [pid 5271] ioctl(5, LOOP_CLR_FD) = 0 [pid 5271] close(5) = 0 [pid 5271] 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 5271] creat("./file1", 000) = 5 [pid 5271] exit_group(0) = ? [pid 5271] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5271, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./115/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./115/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./115/binderfs") = 0 umount2("./115/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 86.301199][ T5271] loop0: detected capacity change from 0 to 512 [ 86.312397][ T5271] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.336284][ T5271] EXT4-fs (loop0): 1 truncate cleaned up umount2("./115/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./115/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./115/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5273 attached [pid 5273] set_robust_list(0x555555fb0660, 24) = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5273 [pid 5273] chdir("./116") = 0 [pid 5273] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5273] setpgid(0, 0) = 0 [pid 5273] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5273] write(3, "1000", 4) = 4 [pid 5273] close(3) = 0 [pid 5273] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5273] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5273] memfd_create("syzkaller", 0) = 4 [pid 5273] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5273] 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 5273] munmap(0x7f3d54b16000, 262144) = 0 [pid 5273] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5273] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5273] close(4) = 0 [pid 5273] mkdir("./file1", 0777) = 0 [pid 5273] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5273] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5273] chdir("./file1") = 0 [pid 5273] ioctl(5, LOOP_CLR_FD) = 0 [pid 5273] close(5) = 0 [pid 5273] 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 5273] creat("./file1", 000) = 5 [pid 5273] exit_group(0) = ? [pid 5273] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5273, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./116/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./116/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./116/binderfs") = 0 umount2("./116/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./116/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./116/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./116/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 86.416816][ T5273] loop0: detected capacity change from 0 to 512 [ 86.435911][ T5273] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.450722][ T5273] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5275 attached , child_tidptr=0x555555fb0650) = 5275 [pid 5275] set_robust_list(0x555555fb0660, 24) = 0 [pid 5275] chdir("./117") = 0 [pid 5275] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5275] setpgid(0, 0) = 0 [pid 5275] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5275] write(3, "1000", 4) = 4 [pid 5275] close(3) = 0 [pid 5275] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5275] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5275] memfd_create("syzkaller", 0) = 4 [pid 5275] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5275] 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 5275] munmap(0x7f3d54b16000, 262144) = 0 [pid 5275] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5275] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5275] close(4) = 0 [pid 5275] mkdir("./file1", 0777) = 0 [pid 5275] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5275] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5275] chdir("./file1") = 0 [pid 5275] ioctl(5, LOOP_CLR_FD) = 0 [pid 5275] close(5) = 0 [pid 5275] 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 5275] creat("./file1", 000) = 5 [pid 5275] exit_group(0) = ? [pid 5275] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5275, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./117/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./117/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./117/binderfs") = 0 umount2("./117/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./117/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./117/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./117/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5277 ./strace-static-x86_64: Process 5277 attached [pid 5277] set_robust_list(0x555555fb0660, 24) = 0 [pid 5277] chdir("./118") = 0 [pid 5277] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5277] setpgid(0, 0) = 0 [pid 5277] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5277] write(3, "1000", 4) = 4 [pid 5277] close(3) = 0 [pid 5277] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5277] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5277] memfd_create("syzkaller", 0) = 4 [pid 5277] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 86.512716][ T5275] loop0: detected capacity change from 0 to 512 [ 86.522213][ T5275] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.537306][ T5275] EXT4-fs (loop0): 1 truncate cleaned up [pid 5277] 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 5277] munmap(0x7f3d54b16000, 262144) = 0 [pid 5277] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5277] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5277] close(4) = 0 [pid 5277] mkdir("./file1", 0777) = 0 [pid 5277] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5277] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5277] chdir("./file1") = 0 [pid 5277] ioctl(5, LOOP_CLR_FD) = 0 [pid 5277] close(5) = 0 [pid 5277] 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 5277] creat("./file1", 000) = 5 [pid 5277] exit_group(0) = ? [pid 5277] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5277, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./118", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./118", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./118/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./118/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./118/binderfs") = 0 umount2("./118/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./118/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./118/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./118/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5279 attached , child_tidptr=0x555555fb0650) = 5279 [pid 5279] set_robust_list(0x555555fb0660, 24) = 0 [pid 5279] chdir("./119") = 0 [pid 5279] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5279] setpgid(0, 0) = 0 [pid 5279] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5279] write(3, "1000", 4) = 4 [pid 5279] close(3) = 0 [pid 5279] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5279] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5279] memfd_create("syzkaller", 0) = 4 [pid 5279] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5279] 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 5279] munmap(0x7f3d54b16000, 262144) = 0 [pid 5279] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 86.595313][ T5277] loop0: detected capacity change from 0 to 512 [ 86.604125][ T5277] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.619761][ T5277] EXT4-fs (loop0): 1 truncate cleaned up [pid 5279] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5279] close(4) = 0 [pid 5279] mkdir("./file1", 0777) = 0 [pid 5279] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5279] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5279] chdir("./file1") = 0 [pid 5279] ioctl(5, LOOP_CLR_FD) = 0 [pid 5279] close(5) = 0 [pid 5279] 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 5279] creat("./file1", 000) = 5 [pid 5279] exit_group(0) = ? [pid 5279] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5279, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./119", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./119", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./119/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./119/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./119/binderfs") = 0 umount2("./119/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./119/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./119/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./119/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5281 attached [pid 5281] set_robust_list(0x555555fb0660, 24) = 0 [pid 5281] chdir("./120") = 0 [pid 5281] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5281] setpgid(0, 0) = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5281 [pid 5281] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5281] write(3, "1000", 4) = 4 [pid 5281] close(3) = 0 [pid 5281] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5281] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5281] memfd_create("syzkaller", 0) = 4 [pid 5281] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5281] 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 [ 86.671381][ T5279] loop0: detected capacity change from 0 to 512 [ 86.681111][ T5279] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.697015][ T5279] EXT4-fs (loop0): 1 truncate cleaned up [pid 5281] munmap(0x7f3d54b16000, 262144) = 0 [pid 5281] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5281] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5281] close(4) = 0 [pid 5281] mkdir("./file1", 0777) = 0 [pid 5281] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5281] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5281] chdir("./file1") = 0 [pid 5281] ioctl(5, LOOP_CLR_FD) = 0 [pid 5281] close(5) = 0 [pid 5281] 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 5281] creat("./file1", 000) = 5 [pid 5281] exit_group(0) = ? [pid 5281] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5281, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./120", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./120", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./120/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./120/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./120/binderfs") = 0 umount2("./120/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./120/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./120/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 [ 86.750878][ T5281] loop0: detected capacity change from 0 to 512 [ 86.761276][ T5281] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.776360][ T5281] EXT4-fs (loop0): 1 truncate cleaned up rmdir("./120/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5283 attached , child_tidptr=0x555555fb0650) = 5283 [pid 5283] set_robust_list(0x555555fb0660, 24) = 0 [pid 5283] chdir("./121") = 0 [pid 5283] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5283] setpgid(0, 0) = 0 [pid 5283] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5283] write(3, "1000", 4) = 4 [pid 5283] close(3) = 0 [pid 5283] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5283] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5283] memfd_create("syzkaller", 0) = 4 [pid 5283] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5283] 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 5283] munmap(0x7f3d54b16000, 262144) = 0 [pid 5283] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5283] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5283] close(4) = 0 [pid 5283] mkdir("./file1", 0777) = 0 [pid 5283] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5283] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5283] chdir("./file1") = 0 [pid 5283] ioctl(5, LOOP_CLR_FD) = 0 [pid 5283] close(5) = 0 [pid 5283] 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 5283] creat("./file1", 000) = 5 [pid 5283] exit_group(0) = ? [pid 5283] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5283, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./121", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./121", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./121/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./121/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./121/binderfs") = 0 umount2("./121/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./121/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./121/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./121/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5286 attached , child_tidptr=0x555555fb0650) = 5286 [pid 5286] set_robust_list(0x555555fb0660, 24) = 0 [pid 5286] chdir("./122") = 0 [pid 5286] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 86.854296][ T9] cfg80211: failed to load regulatory.db [ 86.864014][ T5283] loop0: detected capacity change from 0 to 512 [ 86.876472][ T5283] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.891188][ T5283] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5286] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./122", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./122", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./122/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./122/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./122/binderfs") = 0 umount2("./122/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./122/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./122/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./122/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./122") = 0 mkdir("./123", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 86.947728][ T5286] loop0: detected capacity change from 0 to 512 [ 86.956898][ T5286] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 86.973719][ T5286] EXT4-fs (loop0): 1 truncate cleaned up 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 5288 attached , child_tidptr=0x555555fb0650) = 5288 [pid 5288] set_robust_list(0x555555fb0660, 24) = 0 [pid 5288] chdir("./123") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5288] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./123", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./123", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./123/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./123/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./123/binderfs") = 0 umount2("./123/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./123/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./123/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./123/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5290 ./strace-static-x86_64: Process 5290 attached [pid 5290] set_robust_list(0x555555fb0660, 24) = 0 [pid 5290] chdir("./124") = 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 [ 87.061018][ T5288] loop0: detected capacity change from 0 to 512 [ 87.070057][ T5288] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.085916][ T5288] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./124", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./124", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./124/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./124/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./124/binderfs") = 0 umount2("./124/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./124/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./124/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./124/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5292 ./strace-static-x86_64: Process 5292 attached [pid 5292] set_robust_list(0x555555fb0660, 24) = 0 [pid 5292] chdir("./125") = 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 [ 87.149370][ T5290] loop0: detected capacity change from 0 to 512 [ 87.166102][ T5290] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.180629][ T5290] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5292] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./125", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./125", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./125/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./125/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./125/binderfs") = 0 umount2("./125/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./125/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./125/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./125/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 87.241653][ T5292] loop0: detected capacity change from 0 to 512 [ 87.253210][ T5292] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.268094][ T5292] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5294 attached , child_tidptr=0x555555fb0650) = 5294 [pid 5294] set_robust_list(0x555555fb0660, 24) = 0 [pid 5294] chdir("./126") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5294] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./126", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./126", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./126/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./126/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./126/binderfs") = 0 umount2("./126/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./126/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./126/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./126/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./126") = 0 mkdir("./127", 0777) = 0 [ 87.335453][ T5294] loop0: detected capacity change from 0 to 512 [ 87.345833][ T5294] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.360893][ T5294] EXT4-fs (loop0): 1 truncate cleaned up 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=0x555555fb0650) = 5296 ./strace-static-x86_64: Process 5296 attached [pid 5296] set_robust_list(0x555555fb0660, 24) = 0 [pid 5296] chdir("./127") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5296] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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 */} --- umount2("./127", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./127", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./127/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./127/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./127/binderfs") = 0 umount2("./127/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./127/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./127/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./127/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5298 ./strace-static-x86_64: Process 5298 attached [pid 5298] set_robust_list(0x555555fb0660, 24) = 0 [pid 5298] chdir("./128") = 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 [ 87.438161][ T5296] loop0: detected capacity change from 0 to 512 [ 87.447795][ T5296] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.463767][ T5296] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5298] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./128", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./128", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./128/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./128/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./128/binderfs") = 0 umount2("./128/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./128/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./128/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./128/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5300 ./strace-static-x86_64: Process 5300 attached [pid 5300] set_robust_list(0x555555fb0660, 24) = 0 [pid 5300] chdir("./129") = 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) = 0x7f3d54b16000 [ 87.528771][ T5298] loop0: detected capacity change from 0 to 512 [ 87.538735][ T5298] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.554413][ T5298] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5300] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./129", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./129", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./129/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./129/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./129/binderfs") = 0 umount2("./129/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./129/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./129/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./129/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) [ 87.621399][ T5300] loop0: detected capacity change from 0 to 512 [ 87.631663][ T5300] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.646561][ T5300] EXT4-fs (loop0): 1 truncate cleaned up close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5302 attached , child_tidptr=0x555555fb0650) = 5302 [pid 5302] set_robust_list(0x555555fb0660, 24) = 0 [pid 5302] chdir("./130") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./130", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./130", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./130/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./130/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./130/binderfs") = 0 umount2("./130/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./130/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./130/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./130/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5304 ./strace-static-x86_64: Process 5304 attached [pid 5304] set_robust_list(0x555555fb0660, 24) = 0 [pid 5304] chdir("./131") = 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) = 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) = 0x7f3d54b16000 [ 87.721165][ T5302] loop0: detected capacity change from 0 to 512 [ 87.729957][ T5302] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.745012][ T5302] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [pid 5304] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./131/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./131/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./131/binderfs") = 0 umount2("./131/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./131/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./131/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./131/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5306 attached , child_tidptr=0x555555fb0650) = 5306 [pid 5306] set_robust_list(0x555555fb0660, 24) = 0 [pid 5306] chdir("./132") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5306] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 87.809418][ T5304] loop0: detected capacity change from 0 to 512 [ 87.819591][ T5304] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.834430][ 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=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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./132/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./132/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./132/binderfs") = 0 umount2("./132/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./132/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./132/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./132/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5308 ./strace-static-x86_64: Process 5308 attached [pid 5308] set_robust_list(0x555555fb0660, 24) = 0 [pid 5308] chdir("./133") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 87.882186][ T5306] loop0: detected capacity change from 0 to 512 [ 87.891757][ T5306] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.907037][ 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("./133", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./133", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./133/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./133/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./133/binderfs") = 0 umount2("./133/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./133/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./133/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 [ 87.961750][ T5308] loop0: detected capacity change from 0 to 512 [ 87.970990][ T5308] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 87.986397][ T5308] EXT4-fs (loop0): 1 truncate cleaned up getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./133/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5310 attached [pid 5310] set_robust_list(0x555555fb0660, 24) = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5310 [pid 5310] chdir("./134") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5310] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=3 /* 0.03 s */} --- umount2("./134", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./134", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./134/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./134/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./134/binderfs") = 0 umount2("./134/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./134/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./134/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./134/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5312 attached [pid 5312] set_robust_list(0x555555fb0660, 24 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5312 [pid 5312] <... set_robust_list resumed>) = 0 [pid 5312] chdir("./135") = 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 [ 88.077326][ T5310] loop0: detected capacity change from 0 to 512 [ 88.086425][ T5310] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.101364][ T5310] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5312] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- umount2("./135", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./135", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./135/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./135/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./135/binderfs") = 0 umount2("./135/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./135/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./135/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./135/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5314 attached [pid 5314] set_robust_list(0x555555fb0660, 24) = 0 [pid 5314] chdir("./136") = 0 [pid 5314] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5314] setpgid(0, 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5314 [pid 5314] <... setpgid resumed>) = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5314] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 88.173131][ T5312] loop0: detected capacity change from 0 to 512 [ 88.181811][ T5312] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.197483][ 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=4 /* 0.04 s */} --- umount2("./136", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./136", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./136/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./136/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./136/binderfs") = 0 umount2("./136/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./136/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./136/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./136/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5316 ./strace-static-x86_64: Process 5316 attached [pid 5316] set_robust_list(0x555555fb0660, 24) = 0 [pid 5316] chdir("./137") = 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 [ 88.251858][ T5314] loop0: detected capacity change from 0 to 512 [ 88.260649][ T5314] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.279381][ T5314] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5316] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./137", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./137", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./137/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./137/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./137/binderfs") = 0 umount2("./137/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./137/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./137/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./137/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5318 ./strace-static-x86_64: Process 5318 attached [pid 5318] set_robust_list(0x555555fb0660, 24) = 0 [pid 5318] chdir("./138") = 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 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) = 0x7f3d54b16000 [ 88.342743][ T5316] loop0: detected capacity change from 0 to 512 [ 88.351196][ T5316] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.366254][ T5316] EXT4-fs (loop0): 1 truncate cleaned up [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(0x7f3d54b16000, 262144) = 0 [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=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./138/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./138/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./138/binderfs") = 0 umount2("./138/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./138/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./138/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./138/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5320 attached [pid 5320] set_robust_list(0x555555fb0660, 24) = 0 [pid 5320] chdir("./139") = 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 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5320 [pid 5320] <... openat resumed>) = 3 [ 88.428482][ T5318] loop0: detected capacity change from 0 to 512 [ 88.439610][ T5318] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.460141][ T5318] EXT4-fs (loop0): 1 truncate cleaned up [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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./139", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./139", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./139/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./139/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./139/binderfs") = 0 umount2("./139/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./139/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./139/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./139/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = -1 ENXIO (No such device or address) [ 88.521530][ T5320] loop0: detected capacity change from 0 to 512 [ 88.530722][ T5320] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.546241][ T5320] EXT4-fs (loop0): 1 truncate cleaned up close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5322 attached , child_tidptr=0x555555fb0650) = 5322 [pid 5322] set_robust_list(0x555555fb0660, 24) = 0 [pid 5322] chdir("./140") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5322] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./140", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./140", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./140/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./140/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./140/binderfs") = 0 umount2("./140/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./140/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./140/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./140/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5324 attached , child_tidptr=0x555555fb0650) = 5324 [pid 5324] set_robust_list(0x555555fb0660, 24) = 0 [pid 5324] chdir("./141") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [ 88.623325][ T5322] loop0: detected capacity change from 0 to 512 [ 88.631983][ T5322] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.646856][ T5322] EXT4-fs (loop0): 1 truncate cleaned up [pid 5324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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("./141", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./141", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./141/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./141/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./141/binderfs") = 0 umount2("./141/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./141/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./141/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./141/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5326 attached , child_tidptr=0x555555fb0650) = 5326 [pid 5326] set_robust_list(0x555555fb0660, 24) = 0 [pid 5326] chdir("./142") = 0 [pid 5326] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5326] setpgid(0, 0) = 0 [pid 5326] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5326] write(3, "1000", 4) = 4 [pid 5326] close(3) = 0 [pid 5326] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5326] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5326] memfd_create("syzkaller", 0) = 4 [pid 5326] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5326] 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 5326] munmap(0x7f3d54b16000, 262144) = 0 [pid 5326] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 88.703109][ T5324] loop0: detected capacity change from 0 to 512 [ 88.714608][ T5324] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.729996][ T5324] EXT4-fs (loop0): 1 truncate cleaned up [pid 5326] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5326] close(4) = 0 [pid 5326] mkdir("./file1", 0777) = 0 [pid 5326] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5326] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5326] chdir("./file1") = 0 [pid 5326] ioctl(5, LOOP_CLR_FD) = 0 [pid 5326] close(5) = 0 [pid 5326] 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 5326] creat("./file1", 000) = 5 [pid 5326] exit_group(0) = ? [pid 5326] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5326, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./142/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./142/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./142/binderfs") = 0 [ 88.771718][ T5326] loop0: detected capacity change from 0 to 512 [ 88.797887][ T5326] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.814429][ T5326] EXT4-fs (loop0): 1 truncate cleaned up umount2("./142/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./142/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./142/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./142/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5328 attached [pid 5328] set_robust_list(0x555555fb0660, 24) = 0 [pid 5328] chdir("./143") = 0 [pid 5328] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5328] setpgid(0, 0) = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5328 [pid 5328] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5328] write(3, "1000", 4) = 4 [pid 5328] close(3) = 0 [pid 5328] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5328] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5328] memfd_create("syzkaller", 0) = 4 [pid 5328] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5328] 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 5328] munmap(0x7f3d54b16000, 262144) = 0 [pid 5328] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5328] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5328] close(4) = 0 [pid 5328] mkdir("./file1", 0777) = 0 [pid 5328] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5328] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5328] chdir("./file1") = 0 [pid 5328] ioctl(5, LOOP_CLR_FD) = 0 [pid 5328] close(5) = 0 [pid 5328] 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 5328] creat("./file1", 000) = 5 [pid 5328] exit_group(0) = ? [pid 5328] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5328, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./143/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./143/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./143/binderfs") = 0 umount2("./143/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./143/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./143/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./143/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5330 attached , child_tidptr=0x555555fb0650) = 5330 [pid 5330] set_robust_list(0x555555fb0660, 24) = 0 [pid 5330] chdir("./144") = 0 [pid 5330] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5330] setpgid(0, 0) = 0 [pid 5330] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5330] write(3, "1000", 4) = 4 [pid 5330] close(3) = 0 [pid 5330] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5330] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5330] memfd_create("syzkaller", 0) = 4 [pid 5330] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5330] 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 5330] munmap(0x7f3d54b16000, 262144) = 0 [pid 5330] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 88.865271][ T5328] loop0: detected capacity change from 0 to 512 [ 88.876278][ T5328] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.893637][ T5328] EXT4-fs (loop0): 1 truncate cleaned up [pid 5330] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5330] close(4) = 0 [pid 5330] mkdir("./file1", 0777) = 0 [pid 5330] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5330] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5330] chdir("./file1") = 0 [pid 5330] ioctl(5, LOOP_CLR_FD) = 0 [pid 5330] close(5) = 0 [pid 5330] 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 5330] creat("./file1", 000) = 5 [pid 5330] exit_group(0) = ? [pid 5330] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5330, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./144/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./144/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./144/binderfs") = 0 umount2("./144/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./144/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./144/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./144/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 88.935481][ T5330] loop0: detected capacity change from 0 to 512 [ 88.944985][ T5330] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 88.960379][ T5330] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5332 attached , child_tidptr=0x555555fb0650) = 5332 [pid 5332] set_robust_list(0x555555fb0660, 24) = 0 [pid 5332] chdir("./145") = 0 [pid 5332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5332] setpgid(0, 0) = 0 [pid 5332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5332] write(3, "1000", 4) = 4 [pid 5332] close(3) = 0 [pid 5332] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5332] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5332] memfd_create("syzkaller", 0) = 4 [pid 5332] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5332] 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 5332] munmap(0x7f3d54b16000, 262144) = 0 [pid 5332] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5332] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5332] close(4) = 0 [pid 5332] mkdir("./file1", 0777) = 0 [pid 5332] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5332] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5332] chdir("./file1") = 0 [pid 5332] ioctl(5, LOOP_CLR_FD) = 0 [pid 5332] close(5) = 0 [pid 5332] 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 5332] creat("./file1", 000) = 5 [pid 5332] exit_group(0) = ? [pid 5332] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5332, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./145/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./145/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./145/binderfs") = 0 umount2("./145/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./145/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./145/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./145/file1") = 0 getdents64(3, 0x555555fb16f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./145") = 0 mkdir("./146", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 89.037904][ T5332] loop0: detected capacity change from 0 to 512 [ 89.046700][ T5332] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.061761][ T5332] EXT4-fs (loop0): 1 truncate cleaned up ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5334 attached [pid 5334] set_robust_list(0x555555fb0660, 24) = 0 [pid 5334] chdir("./146") = 0 [pid 5334] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5334] setpgid(0, 0) = 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5334 [pid 5334] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5334] write(3, "1000", 4) = 4 [pid 5334] close(3) = 0 [pid 5334] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5334] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5334] memfd_create("syzkaller", 0) = 4 [pid 5334] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5334] 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 5334] munmap(0x7f3d54b16000, 262144) = 0 [pid 5334] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5334] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5334] close(4) = 0 [pid 5334] mkdir("./file1", 0777) = 0 [pid 5334] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5334] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5334] chdir("./file1") = 0 [pid 5334] ioctl(5, LOOP_CLR_FD) = 0 [pid 5334] close(5) = 0 [pid 5334] 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 5334] creat("./file1", 000) = 5 [pid 5334] exit_group(0) = ? [pid 5334] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5334, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./146/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./146/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./146/binderfs") = 0 umount2("./146/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./146/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./146/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./146/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5336 attached [pid 5336] set_robust_list(0x555555fb0660, 24) = 0 [pid 5336] chdir("./147") = 0 [pid 5336] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5336] setpgid(0, 0) = 0 [pid 5336] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5336] write(3, "1000", 4) = 4 [pid 5336] close(3) = 0 [pid 5336] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5336] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5336] memfd_create("syzkaller", 0 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5336 [pid 5336] <... memfd_create resumed>) = 4 [pid 5336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 89.155358][ T5334] loop0: detected capacity change from 0 to 512 [ 89.165385][ T5334] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.180723][ T5334] EXT4-fs (loop0): 1 truncate cleaned up [pid 5336] 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 5336] munmap(0x7f3d54b16000, 262144) = 0 [pid 5336] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5336] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5336] close(4) = 0 [pid 5336] mkdir("./file1", 0777) = 0 [pid 5336] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5336] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5336] chdir("./file1") = 0 [pid 5336] ioctl(5, LOOP_CLR_FD) = 0 [pid 5336] close(5) = 0 [pid 5336] 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 5336] creat("./file1", 000) = 5 [pid 5336] exit_group(0) = ? [pid 5336] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5336, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./147", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./147", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./147/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./147/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./147/binderfs") = 0 umount2("./147/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./147/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./147/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./147/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5338 ./strace-static-x86_64: Process 5338 attached [ 89.241703][ T5336] loop0: detected capacity change from 0 to 512 [ 89.252088][ T5336] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.267607][ T5336] EXT4-fs (loop0): 1 truncate cleaned up [pid 5338] set_robust_list(0x555555fb0660, 24) = 0 [pid 5338] chdir("./148") = 0 [pid 5338] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5338] setpgid(0, 0) = 0 [pid 5338] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5338] write(3, "1000", 4) = 4 [pid 5338] close(3) = 0 [pid 5338] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5338] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5338] memfd_create("syzkaller", 0) = 4 [pid 5338] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5338] 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 5338] munmap(0x7f3d54b16000, 262144) = 0 [pid 5338] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5338] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5338] close(4) = 0 [pid 5338] mkdir("./file1", 0777) = 0 [pid 5338] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5338] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5338] chdir("./file1") = 0 [pid 5338] ioctl(5, LOOP_CLR_FD) = 0 [pid 5338] close(5) = 0 [pid 5338] 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 5338] creat("./file1", 000) = 5 [pid 5338] exit_group(0) = ? [pid 5338] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5338, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./148/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./148/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./148/binderfs") = 0 umount2("./148/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./148/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./148/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./148/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5340 ./strace-static-x86_64: Process 5340 attached [pid 5340] set_robust_list(0x555555fb0660, 24) = 0 [pid 5340] chdir("./149") = 0 [pid 5340] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5340] setpgid(0, 0) = 0 [pid 5340] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5340] write(3, "1000", 4) = 4 [pid 5340] close(3) = 0 [pid 5340] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5340] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5340] memfd_create("syzkaller", 0) = 4 [pid 5340] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5340] 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 5340] munmap(0x7f3d54b16000, 262144) = 0 [pid 5340] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 89.337642][ T5338] loop0: detected capacity change from 0 to 512 [ 89.346409][ T5338] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.361405][ T5338] EXT4-fs (loop0): 1 truncate cleaned up [pid 5340] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5340] close(4) = 0 [pid 5340] mkdir("./file1", 0777) = 0 [pid 5340] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5340] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5340] chdir("./file1") = 0 [pid 5340] ioctl(5, LOOP_CLR_FD) = 0 [pid 5340] close(5) = 0 [pid 5340] 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 5340] creat("./file1", 000) = 5 [pid 5340] exit_group(0) = ? [pid 5340] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5340, 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./149/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./149/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./149/binderfs") = 0 umount2("./149/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./149/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./149/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./149/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5342 attached , child_tidptr=0x555555fb0650) = 5342 [pid 5342] set_robust_list(0x555555fb0660, 24) = 0 [pid 5342] chdir("./150") = 0 [pid 5342] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5342] setpgid(0, 0) = 0 [pid 5342] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5342] write(3, "1000", 4) = 4 [pid 5342] close(3) = 0 [pid 5342] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5342] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5342] memfd_create("syzkaller", 0) = 4 [pid 5342] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5342] 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 5342] munmap(0x7f3d54b16000, 262144) = 0 [pid 5342] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 89.414205][ T5340] loop0: detected capacity change from 0 to 512 [ 89.423640][ T5340] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.438898][ T5340] EXT4-fs (loop0): 1 truncate cleaned up [pid 5342] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5342] close(4) = 0 [pid 5342] mkdir("./file1", 0777) = 0 [pid 5342] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5342] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5342] chdir("./file1") = 0 [pid 5342] ioctl(5, LOOP_CLR_FD) = 0 [pid 5342] close(5) = 0 [pid 5342] 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 5342] creat("./file1", 000) = 5 [pid 5342] exit_group(0) = ? [pid 5342] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5342, 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./150/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./150/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./150/binderfs") = 0 umount2("./150/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./150/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./150/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./150/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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=0x555555fb0650) = 5344 ./strace-static-x86_64: Process 5344 attached [pid 5344] set_robust_list(0x555555fb0660, 24) = 0 [pid 5344] chdir("./151") = 0 [pid 5344] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5344] setpgid(0, 0) = 0 [pid 5344] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5344] write(3, "1000", 4) = 4 [pid 5344] close(3) = 0 [pid 5344] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5344] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5344] memfd_create("syzkaller", 0) = 4 [pid 5344] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5344] 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 5344] munmap(0x7f3d54b16000, 262144) = 0 [pid 5344] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 89.495437][ T5342] loop0: detected capacity change from 0 to 512 [ 89.505421][ T5342] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.521271][ T5342] EXT4-fs (loop0): 1 truncate cleaned up [pid 5344] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5344] close(4) = 0 [pid 5344] mkdir("./file1", 0777) = 0 [pid 5344] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5344] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5344] chdir("./file1") = 0 [pid 5344] ioctl(5, LOOP_CLR_FD) = 0 [pid 5344] close(5) = 0 [pid 5344] 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 5344] creat("./file1", 000) = 5 [pid 5344] exit_group(0) = ? [pid 5344] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5344, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./151", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./151", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./151/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./151/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./151/binderfs") = 0 umount2("./151/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./151/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./151/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./151/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5346 attached , child_tidptr=0x555555fb0650) = 5346 [pid 5346] set_robust_list(0x555555fb0660, 24) = 0 [pid 5346] chdir("./152") = 0 [pid 5346] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5346] setpgid(0, 0) = 0 [pid 5346] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5346] write(3, "1000", 4) = 4 [pid 5346] close(3) = 0 [pid 5346] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5346] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5346] memfd_create("syzkaller", 0) = 4 [pid 5346] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5346] 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 [ 89.574500][ T5344] loop0: detected capacity change from 0 to 512 [ 89.584721][ T5344] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.600264][ T5344] EXT4-fs (loop0): 1 truncate cleaned up [pid 5346] munmap(0x7f3d54b16000, 262144) = 0 [pid 5346] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5346] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5346] close(4) = 0 [pid 5346] mkdir("./file1", 0777) = 0 [pid 5346] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5346] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5346] chdir("./file1") = 0 [pid 5346] ioctl(5, LOOP_CLR_FD) = 0 [pid 5346] close(5) = 0 [pid 5346] 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 5346] creat("./file1", 000) = 5 [pid 5346] exit_group(0) = ? [pid 5346] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5346, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./152", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./152", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./152/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./152/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./152/binderfs") = 0 umount2("./152/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./152/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./152/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./152/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5348 ./strace-static-x86_64: Process 5348 attached [pid 5348] set_robust_list(0x555555fb0660, 24) = 0 [pid 5348] chdir("./153") = 0 [pid 5348] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5348] setpgid(0, 0) = 0 [pid 5348] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5348] write(3, "1000", 4) = 4 [pid 5348] close(3) = 0 [pid 5348] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5348] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5348] memfd_create("syzkaller", 0) = 4 [pid 5348] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5348] 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 5348] munmap(0x7f3d54b16000, 262144) = 0 [pid 5348] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 89.656365][ T5346] loop0: detected capacity change from 0 to 512 [ 89.665216][ T5346] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.680102][ T5346] EXT4-fs (loop0): 1 truncate cleaned up [pid 5348] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5348] close(4) = 0 [pid 5348] mkdir("./file1", 0777) = 0 [pid 5348] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5348] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5348] chdir("./file1") = 0 [pid 5348] ioctl(5, LOOP_CLR_FD) = 0 [pid 5348] close(5) = 0 [pid 5348] 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 5348] creat("./file1", 000) = 5 [pid 5348] exit_group(0) = ? [pid 5348] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5348, 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./153/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./153/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./153/binderfs") = 0 umount2("./153/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./153/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./153/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./153/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5350 attached , child_tidptr=0x555555fb0650) = 5350 [pid 5350] set_robust_list(0x555555fb0660, 24) = 0 [ 89.732325][ T5348] loop0: detected capacity change from 0 to 512 [ 89.742576][ T5348] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.757711][ T5348] EXT4-fs (loop0): 1 truncate cleaned up [pid 5350] chdir("./154") = 0 [pid 5350] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5350] setpgid(0, 0) = 0 [pid 5350] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5350] write(3, "1000", 4) = 4 [pid 5350] close(3) = 0 [pid 5350] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5350] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5350] memfd_create("syzkaller", 0) = 4 [pid 5350] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5350] 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 5350] munmap(0x7f3d54b16000, 262144) = 0 [pid 5350] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5350] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5350] close(4) = 0 [pid 5350] mkdir("./file1", 0777) = 0 [pid 5350] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5350] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5350] chdir("./file1") = 0 [pid 5350] ioctl(5, LOOP_CLR_FD) = 0 [pid 5350] close(5) = 0 [pid 5350] 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 5350] creat("./file1", 000) = 5 [pid 5350] exit_group(0) = ? [pid 5350] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5350, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./154/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./154/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./154/binderfs") = 0 umount2("./154/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./154/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./154/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./154/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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, child_tidptr=0x555555fb0650) = 5352 ./strace-static-x86_64: Process 5352 attached [pid 5352] set_robust_list(0x555555fb0660, 24) = 0 [pid 5352] chdir("./155") = 0 [pid 5352] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5352] setpgid(0, 0) = 0 [pid 5352] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5352] write(3, "1000", 4) = 4 [pid 5352] close(3) = 0 [pid 5352] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5352] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5352] memfd_create("syzkaller", 0) = 4 [pid 5352] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 89.832497][ T5350] loop0: detected capacity change from 0 to 512 [ 89.841686][ T5350] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.856734][ T5350] EXT4-fs (loop0): 1 truncate cleaned up [pid 5352] 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 5352] munmap(0x7f3d54b16000, 262144) = 0 [pid 5352] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5352] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5352] close(4) = 0 [pid 5352] mkdir("./file1", 0777) = 0 [pid 5352] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5352] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5352] chdir("./file1") = 0 [pid 5352] ioctl(5, LOOP_CLR_FD) = 0 [pid 5352] close(5) = 0 [pid 5352] 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 5352] creat("./file1", 000) = 5 [pid 5352] exit_group(0) = ? [pid 5352] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5352, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./155/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./155/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./155/binderfs") = 0 umount2("./155/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./155/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./155/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./155/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5354 attached , child_tidptr=0x555555fb0650) = 5354 [pid 5354] set_robust_list(0x555555fb0660, 24) = 0 [pid 5354] chdir("./156") = 0 [pid 5354] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5354] setpgid(0, 0) = 0 [pid 5354] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5354] write(3, "1000", 4) = 4 [pid 5354] close(3) = 0 [pid 5354] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5354] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5354] memfd_create("syzkaller", 0) = 4 [pid 5354] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5354] 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 5354] munmap(0x7f3d54b16000, 262144) = 0 [pid 5354] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 89.915708][ T5352] loop0: detected capacity change from 0 to 512 [ 89.924640][ T5352] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 89.939829][ T5352] EXT4-fs (loop0): 1 truncate cleaned up [pid 5354] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5354] close(4) = 0 [pid 5354] mkdir("./file1", 0777) = 0 [pid 5354] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5354] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5354] chdir("./file1") = 0 [pid 5354] ioctl(5, LOOP_CLR_FD) = 0 [pid 5354] close(5) = 0 [pid 5354] 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 5354] creat("./file1", 000) = 5 [pid 5354] exit_group(0) = ? [pid 5354] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5354, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./156/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./156/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./156/binderfs") = 0 umount2("./156/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./156/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./156/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./156/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5356 attached , child_tidptr=0x555555fb0650) = 5356 [pid 5356] set_robust_list(0x555555fb0660, 24) = 0 [pid 5356] chdir("./157") = 0 [pid 5356] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5356] setpgid(0, 0) = 0 [pid 5356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5356] write(3, "1000", 4) = 4 [pid 5356] close(3) = 0 [pid 5356] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5356] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5356] memfd_create("syzkaller", 0) = 4 [pid 5356] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5356] 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 [ 89.993325][ T5354] loop0: detected capacity change from 0 to 512 [ 90.003286][ T5354] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 90.017648][ T5354] EXT4-fs (loop0): 1 truncate cleaned up [pid 5356] munmap(0x7f3d54b16000, 262144) = 0 [pid 5356] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5356] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5356] close(4) = 0 [pid 5356] mkdir("./file1", 0777) = 0 [ 90.064897][ T5356] loop0: detected capacity change from 0 to 512 [ 90.075968][ T5356] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5356] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5356] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5356] chdir("./file1") = 0 [pid 5356] ioctl(5, LOOP_CLR_FD) = 0 [pid 5356] close(5) = 0 [pid 5356] 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 5356] creat("./file1", 000) = 5 [pid 5356] exit_group(0) = ? [pid 5356] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5356, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./157", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./157", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./157/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./157/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./157/binderfs") = 0 umount2("./157/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./157/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./157/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./157/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 5358 attached [pid 5358] set_robust_list(0x555555fb0660, 24 [pid 5034] <... clone resumed>, child_tidptr=0x555555fb0650) = 5358 [pid 5358] <... set_robust_list resumed>) = 0 [pid 5358] chdir("./158") = 0 [pid 5358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5358] setpgid(0, 0) = 0 [pid 5358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5358] write(3, "1000", 4) = 4 [pid 5358] close(3) = 0 [pid 5358] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5358] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5358] memfd_create("syzkaller", 0) = 4 [pid 5358] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5358] 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 5358] munmap(0x7f3d54b16000, 262144) = 0 [ 90.105263][ T5356] EXT4-fs (loop0): 1 truncate cleaned up [pid 5358] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5358] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5358] close(4) = 0 [pid 5358] mkdir("./file1", 0777) = 0 [pid 5358] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5358] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5358] chdir("./file1") = 0 [pid 5358] ioctl(5, LOOP_CLR_FD) = 0 [pid 5358] close(5) = 0 [pid 5358] 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 5358] creat("./file1", 000) = 5 [pid 5358] exit_group(0) = ? [pid 5358] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5358, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./158/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./158/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./158/binderfs") = 0 umount2("./158/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./158/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./158/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./158/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 90.167019][ T5358] loop0: detected capacity change from 0 to 512 [ 90.179098][ T5358] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 90.195211][ T5358] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5360 attached , child_tidptr=0x555555fb0650) = 5360 [pid 5360] set_robust_list(0x555555fb0660, 24) = 0 [pid 5360] chdir("./159") = 0 [pid 5360] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5360] setpgid(0, 0) = 0 [pid 5360] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5360] write(3, "1000", 4) = 4 [pid 5360] close(3) = 0 [pid 5360] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5360] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5360] memfd_create("syzkaller", 0) = 4 [pid 5360] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5360] 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 5360] munmap(0x7f3d54b16000, 262144) = 0 [pid 5360] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5360] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5360] close(4) = 0 [pid 5360] mkdir("./file1", 0777) = 0 [pid 5360] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5360] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5360] chdir("./file1") = 0 [pid 5360] ioctl(5, LOOP_CLR_FD) = 0 [pid 5360] close(5) = 0 [pid 5360] 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 5360] creat("./file1", 000) = 5 [pid 5360] exit_group(0) = ? [pid 5360] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5360, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./159/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./159/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./159/binderfs") = 0 umount2("./159/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./159/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./159/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./159/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5362 ./strace-static-x86_64: Process 5362 attached [pid 5362] set_robust_list(0x555555fb0660, 24) = 0 [pid 5362] chdir("./160") = 0 [pid 5362] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5362] setpgid(0, 0) = 0 [pid 5362] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5362] write(3, "1000", 4) = 4 [pid 5362] close(3) = 0 [pid 5362] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5362] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5362] memfd_create("syzkaller", 0) = 4 [pid 5362] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [ 90.256135][ T5360] loop0: detected capacity change from 0 to 512 [ 90.265887][ T5360] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 90.281066][ T5360] EXT4-fs (loop0): 1 truncate cleaned up [pid 5362] 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 5362] munmap(0x7f3d54b16000, 262144) = 0 [pid 5362] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5362] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5362] close(4) = 0 [pid 5362] mkdir("./file1", 0777) = 0 [pid 5362] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5362] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5362] chdir("./file1") = 0 [pid 5362] ioctl(5, LOOP_CLR_FD) = 0 [pid 5362] close(5) = 0 [pid 5362] 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 5362] creat("./file1", 000) = 5 [pid 5362] exit_group(0) = ? [pid 5362] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5362, 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./160/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./160/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./160/binderfs") = 0 umount2("./160/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./160/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./160/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./160/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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 [ 90.342864][ T5362] loop0: detected capacity change from 0 to 512 [ 90.355050][ T5362] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 90.371058][ T5362] EXT4-fs (loop0): 1 truncate cleaned up clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555fb0650) = 5364 ./strace-static-x86_64: Process 5364 attached [pid 5364] set_robust_list(0x555555fb0660, 24) = 0 [pid 5364] chdir("./161") = 0 [pid 5364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5364] setpgid(0, 0) = 0 [pid 5364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5364] write(3, "1000", 4) = 4 [pid 5364] close(3) = 0 [pid 5364] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5364] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5364] memfd_create("syzkaller", 0) = 4 [pid 5364] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5364] 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 5364] munmap(0x7f3d54b16000, 262144) = 0 [pid 5364] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5364] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5364] close(4) = 0 [pid 5364] mkdir("./file1", 0777) = 0 [pid 5364] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5364] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5364] chdir("./file1") = 0 [pid 5364] ioctl(5, LOOP_CLR_FD) = 0 [pid 5364] close(5) = 0 [pid 5364] 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 5364] creat("./file1", 000) = 5 [pid 5364] exit_group(0) = ? [pid 5364] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5364, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./161/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./161/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./161/binderfs") = 0 umount2("./161/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./161/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./161/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./161/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5366 attached , child_tidptr=0x555555fb0650) = 5366 [pid 5366] set_robust_list(0x555555fb0660, 24) = 0 [ 90.429985][ T5364] loop0: detected capacity change from 0 to 512 [ 90.445199][ T5364] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 90.460532][ T5364] EXT4-fs (loop0): 1 truncate cleaned up [pid 5366] chdir("./162") = 0 [pid 5366] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5366] setpgid(0, 0) = 0 [pid 5366] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5366] write(3, "1000", 4) = 4 [pid 5366] close(3) = 0 [pid 5366] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5366] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 5366] memfd_create("syzkaller", 0) = 4 [pid 5366] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d54b16000 [pid 5366] 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 5366] munmap(0x7f3d54b16000, 262144) = 0 [pid 5366] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5366] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 5366] close(4) = 0 [pid 5366] mkdir("./file1", 0777) = 0 [pid 5366] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5366] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5366] chdir("./file1") = 0 [pid 5366] ioctl(5, LOOP_CLR_FD) = 0 [pid 5366] close(5) = 0 [pid 5366] 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 5366] creat("./file1", 000) = 5 [pid 5366] exit_group(0) = ? [pid 5366] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5366, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555555fb16f0 /* 4 entries */, 32768) = 112 umount2("./162/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./162/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./162/binderfs") = 0 umount2("./162/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./162/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./162/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 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 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555fb9730 /* 2 entries */, 32768) = 48 getdents64(4, 0x555555fb9730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./162/file1") = 0 getdents64(3, 0x555555fb16f0 /* 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./strace-static-x86_64: Process 5369 attached , child_tidptr=0x555555fb0650) = 5369 [ 90.531064][ T5366] loop0: detected capacity change from 0 to 512 [ 90.540389][ T5366] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 90.555602][ T5366] EXT4-fs (loop0): 1 truncate cleaned up [pid 5369] set_robust_list(0x555555fb0660, 24) = 0 [pid 5369] chdir("./163") = 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) = 0x7f3d54b16000 [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(0x7f3d54b16000, 262144) = 0 [pid 5369] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [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