./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor52196980 <...> [ 102.303239][ T27] audit: type=1400 audit(1702312731.986:83): avc: denied { append } for pid=4493 comm="syslogd" name="messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 102.325607][ T27] audit: type=1400 audit(1702312731.986:84): avc: denied { open } for pid=4493 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 102.348141][ T27] audit: type=1400 audit(1702312731.986:85): avc: denied { getattr } for pid=4493 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 Warning: Permanently added '10.128.1.51' (ED25519) to the list of known hosts. execve("./syz-executor52196980", ["./syz-executor52196980"], 0x7ffcf667cf20 /* 10 vars */) = 0 brk(NULL) = 0x5555558d8000 brk(0x5555558d8d00) = 0x5555558d8d00 arch_prctl(ARCH_SET_FS, 0x5555558d8380) = 0 set_tid_address(0x5555558d8650) = 5066 set_robust_list(0x5555558d8660, 24) = 0 rseq(0x5555558d8ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor52196980", 4096) = 26 getrandom("\x07\xab\x5e\x2e\x45\xf6\x31\x17", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555558d8d00 brk(0x5555558f9d00) = 0x5555558f9d00 brk(0x5555558fa000) = 0x5555558fa000 mprotect(0x7faa52139000, 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.eYMqFc", 0700) = 0 chmod("./syzkaller.eYMqFc", 0777) = 0 chdir("./syzkaller.eYMqFc") = 0 mkdir("./0", 0777) = 0 [ 104.533488][ T27] audit: type=1400 audit(1702312734.216:86): avc: denied { execmem } for pid=5066 comm="syz-executor521" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_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=0x5555558d8650) = 5067 ./strace-static-x86_64: Process 5067 attached [pid 5067] set_robust_list(0x5555558d8660, 24) = 0 [pid 5067] chdir("./0") = 0 [pid 5067] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5067] setpgid(0, 0) = 0 [pid 5067] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1000", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5067] memfd_create("syzkaller", 0) = 3 [ 104.587358][ T27] audit: type=1400 audit(1702312734.276:87): avc: denied { read write } for pid=5066 comm="syz-executor521" name="loop0" dev="devtmpfs" ino=648 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 104.612584][ T27] audit: type=1400 audit(1702312734.276:88): avc: denied { open } for pid=5066 comm="syz-executor521" path="/dev/loop0" dev="devtmpfs" ino=648 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 5067] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5067] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5067] munmap(0x7faa49c86000, 138412032) = 0 [pid 5067] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 104.638526][ T27] audit: type=1400 audit(1702312734.276:89): avc: denied { ioctl } for pid=5066 comm="syz-executor521" path="/dev/loop0" dev="devtmpfs" ino=648 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 5067] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5067] close(3) = 0 [pid 5067] mkdir("./file1", 0777) = 0 [ 104.685577][ T5067] loop0: detected capacity change from 0 to 512 [ 104.699182][ T27] audit: type=1400 audit(1702312734.386:90): avc: denied { mounton } for pid=5067 comm="syz-executor521" path="/root/syzkaller.eYMqFc/0/file1" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 104.703775][ T5067] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5067] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5067] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5067] chdir("./file1") = 0 [pid 5067] ioctl(4, LOOP_CLR_FD) = 0 [pid 5067] close(4) = 0 [ 104.745314][ T5067] EXT4-fs (loop0): 1 truncate cleaned up [ 104.751093][ T5067] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 104.765661][ T27] audit: type=1400 audit(1702312734.446:91): avc: denied { mount } for pid=5067 comm="syz-executor521" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [pid 5067] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5067] creat("./file1", 000) = 4 [pid 5067] exit_group(0) = ? [pid 5067] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5067, si_uid=0, si_status=0, si_utime=0, si_stime=9 /* 0.09 s */} --- 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 [ 104.805248][ T27] audit: type=1400 audit(1702312734.486:92): avc: denied { setattr } for pid=5067 comm="syz-executor521" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 getdents64(3, 0x5555558d96f0 /* 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 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 [ 104.893693][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5070 attached , child_tidptr=0x5555558d8650) = 5070 [pid 5070] set_robust_list(0x5555558d8660, 24) = 0 [pid 5070] chdir("./1") = 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 [pid 5070] memfd_create("syzkaller", 0) = 3 [pid 5070] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5070] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5070] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5070] close(3) = 0 [pid 5070] mkdir("./file1", 0777) = 0 [ 105.119088][ T5070] loop0: detected capacity change from 0 to 512 [ 105.144802][ T5070] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 105.162177][ T5070] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5070] chdir("./file1") = 0 [pid 5070] ioctl(4, LOOP_CLR_FD) = 0 [pid 5070] close(4) = 0 [pid 5070] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5070] creat("./file1", 000) = 4 [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("./1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 105.167970][ T5070] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. 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, 0x5555558d96f0 /* 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 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 [ 105.280703][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./1") = 0 mkdir("./2", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5072 attached , child_tidptr=0x5555558d8650) = 5072 [pid 5072] set_robust_list(0x5555558d8660, 24) = 0 [pid 5072] chdir("./2") = 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] memfd_create("syzkaller", 0) = 3 [pid 5072] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5072] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5072] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5072] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5072] close(3) = 0 [pid 5072] mkdir("./file1", 0777) = 0 [ 105.497952][ T5072] loop0: detected capacity change from 0 to 512 [ 105.523315][ T5072] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 105.541141][ T5072] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5072] chdir("./file1") = 0 [pid 5072] ioctl(4, LOOP_CLR_FD) = 0 [pid 5072] close(4) = 0 [ 105.546912][ T5072] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5072] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5072] creat("./file1", 000) = 4 [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=7 /* 0.07 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, 0x5555558d96f0 /* 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 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) [ 105.677492][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5074 attached , child_tidptr=0x5555558d8650) = 5074 [pid 5074] set_robust_list(0x5555558d8660, 24) = 0 [pid 5074] chdir("./3") = 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] memfd_create("syzkaller", 0) = 3 [pid 5074] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5074] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5074] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5074] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5074] close(3) = 0 [pid 5074] mkdir("./file1", 0777) = 0 [ 105.906149][ T5074] loop0: detected capacity change from 0 to 512 [ 105.922336][ T5074] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 105.950560][ T5074] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5074] chdir("./file1") = 0 [pid 5074] ioctl(4, LOOP_CLR_FD) = 0 [pid 5074] close(4) = 0 [pid 5074] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5074] creat("./file1", 000) = 4 [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=4 /* 0.04 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, 0x5555558d96f0 /* 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 [ 105.956377][ T5074] 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 [ 106.020883][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5076 attached , child_tidptr=0x5555558d8650) = 5076 [pid 5076] set_robust_list(0x5555558d8660, 24) = 0 [pid 5076] chdir("./4") = 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] memfd_create("syzkaller", 0) = 3 [pid 5076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5076] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5076] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5076] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5076] close(3) = 0 [pid 5076] mkdir("./file1", 0777) = 0 [ 106.241737][ T5076] loop0: detected capacity change from 0 to 512 [ 106.266906][ T5076] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 106.284530][ T5076] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5076] chdir("./file1") = 0 [pid 5076] ioctl(4, LOOP_CLR_FD) = 0 [pid 5076] close(4) = 0 [pid 5076] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5076] creat("./file1", 000) = 4 [pid 5076] exit_group(0) = ? [ 106.290339][ T5076] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [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=8 /* 0.08 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./4") = 0 [ 106.411882][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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 5078 attached , child_tidptr=0x5555558d8650) = 5078 [pid 5078] set_robust_list(0x5555558d8660, 24) = 0 [pid 5078] chdir("./5") = 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] memfd_create("syzkaller", 0) = 3 [pid 5078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5078] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5078] munmap(0x7faa49c86000, 138412032) = 0 [pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5078] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5078] close(3) = 0 [pid 5078] mkdir("./file1", 0777) = 0 [ 106.579384][ T5078] loop0: detected capacity change from 0 to 512 [ 106.597350][ T5078] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 106.615054][ T5078] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5078] chdir("./file1") = 0 [pid 5078] ioctl(4, LOOP_CLR_FD) = 0 [pid 5078] close(4) = 0 [ 106.620805][ T5078] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5078] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5078] creat("./file1", 000) = 4 [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=6 /* 0.06 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 [ 106.754672][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5080 attached [pid 5080] set_robust_list(0x5555558d8660, 24) = 0 [pid 5066] <... clone resumed>, child_tidptr=0x5555558d8650) = 5080 [pid 5080] chdir("./6") = 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] memfd_create("syzkaller", 0) = 3 [pid 5080] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5080] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5080] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5080] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5080] close(3) = 0 [pid 5080] mkdir("./file1", 0777) = 0 [ 107.015100][ T5080] loop0: detected capacity change from 0 to 512 [ 107.030086][ T5080] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 107.048266][ T5080] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5080] chdir("./file1") = 0 [pid 5080] ioctl(4, LOOP_CLR_FD) = 0 [pid 5080] close(4) = 0 [pid 5080] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5080] creat("./file1", 000) = 4 [ 107.053960][ T5080] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [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=6 /* 0.06 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, 0x5555558d96f0 /* 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 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 [ 107.185900][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5083 attached , child_tidptr=0x5555558d8650) = 5083 [pid 5083] set_robust_list(0x5555558d8660, 24) = 0 [pid 5083] chdir("./7") = 0 [pid 5083] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5083] setpgid(0, 0) = 0 [pid 5083] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5083] write(3, "1000", 4) = 4 [pid 5083] close(3) = 0 [pid 5083] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5083] memfd_create("syzkaller", 0) = 3 [pid 5083] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5083] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5083] munmap(0x7faa49c86000, 138412032) = 0 [pid 5083] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5083] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5083] close(3) = 0 [pid 5083] mkdir("./file1", 0777) = 0 [ 107.446962][ T5083] loop0: detected capacity change from 0 to 512 [ 107.472130][ T5083] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 107.490217][ T5083] EXT4-fs (loop0): 1 truncate cleaned up [pid 5083] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5083] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5083] chdir("./file1") = 0 [pid 5083] ioctl(4, LOOP_CLR_FD) = 0 [pid 5083] close(4) = 0 [pid 5083] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 107.496048][ T5083] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5083] creat("./file1", 000) = 4 [pid 5083] exit_group(0) = ? [pid 5083] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5083, si_uid=0, si_status=0, si_utime=0, si_stime=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, 0x5555558d96f0 /* 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 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 [ 107.655535][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5085 attached , child_tidptr=0x5555558d8650) = 5085 [pid 5085] set_robust_list(0x5555558d8660, 24) = 0 [pid 5085] chdir("./8") = 0 [pid 5085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5085] setpgid(0, 0) = 0 [pid 5085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5085] write(3, "1000", 4) = 4 [pid 5085] close(3) = 0 [pid 5085] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5085] memfd_create("syzkaller", 0) = 3 [pid 5085] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5085] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5085] munmap(0x7faa49c86000, 138412032) = 0 [pid 5085] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5085] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5085] close(3) = 0 [pid 5085] mkdir("./file1", 0777) = 0 [ 107.887184][ T5085] loop0: detected capacity change from 0 to 512 [ 107.903798][ T5085] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 107.920799][ T5085] EXT4-fs (loop0): 1 truncate cleaned up [pid 5085] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5085] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5085] chdir("./file1") = 0 [pid 5085] ioctl(4, LOOP_CLR_FD) = 0 [pid 5085] close(4) = 0 [ 107.926570][ T5085] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5085] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5085] creat("./file1", 000) = 4 [pid 5085] exit_group(0) = ? [pid 5085] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5085, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 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, 0x5555558d96f0 /* 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 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 [ 108.038825][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5087 attached , child_tidptr=0x5555558d8650) = 5087 [pid 5087] set_robust_list(0x5555558d8660, 24) = 0 [pid 5087] chdir("./9") = 0 [pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5087] setpgid(0, 0) = 0 [pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5087] write(3, "1000", 4) = 4 [pid 5087] close(3) = 0 [pid 5087] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5087] memfd_create("syzkaller", 0) = 3 [pid 5087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5087] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5087] munmap(0x7faa49c86000, 138412032) = 0 [pid 5087] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5087] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5087] close(3) = 0 [pid 5087] mkdir("./file1", 0777) = 0 [ 108.240187][ T5087] loop0: detected capacity change from 0 to 512 [ 108.257069][ T5087] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 108.275316][ T5087] EXT4-fs (loop0): 1 truncate cleaned up [pid 5087] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5087] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5087] chdir("./file1") = 0 [pid 5087] ioctl(4, LOOP_CLR_FD) = 0 [pid 5087] close(4) = 0 [ 108.281157][ T5087] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5087] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5087] creat("./file1", 000) = 4 [pid 5087] exit_group(0) = ? [pid 5087] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5087, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 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, 0x5555558d96f0 /* 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 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) [ 108.385361][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5090 attached , child_tidptr=0x5555558d8650) = 5090 [pid 5090] set_robust_list(0x5555558d8660, 24) = 0 [pid 5090] chdir("./10") = 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] memfd_create("syzkaller", 0) = 3 [pid 5090] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5090] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5090] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5090] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5090] close(3) = 0 [pid 5090] mkdir("./file1", 0777) = 0 [ 108.603013][ T5090] loop0: detected capacity change from 0 to 512 [ 108.629778][ T5090] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 108.647161][ T5090] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5090] chdir("./file1") = 0 [pid 5090] ioctl(4, LOOP_CLR_FD) = 0 [pid 5090] close(4) = 0 [pid 5090] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 108.652839][ T5090] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5090] creat("./file1", 000) = 4 [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=5 /* 0.05 s */} --- 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, 0x5555558d96f0 /* 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 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) [ 108.812956][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5092 attached , child_tidptr=0x5555558d8650) = 5092 [pid 5092] set_robust_list(0x5555558d8660, 24) = 0 [pid 5092] chdir("./11") = 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] memfd_create("syzkaller", 0) = 3 [pid 5092] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5092] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5092] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5092] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5092] close(3) = 0 [pid 5092] mkdir("./file1", 0777) = 0 [ 109.036321][ T5092] loop0: detected capacity change from 0 to 512 [ 109.052159][ T5092] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 109.069677][ T5092] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5092] chdir("./file1") = 0 [pid 5092] ioctl(4, LOOP_CLR_FD) = 0 [pid 5092] close(4) = 0 [ 109.075373][ T5092] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5092] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5092] creat("./file1", 000) = 4 [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=3 /* 0.03 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, 0x5555558d96f0 /* 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 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 [ 109.206074][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5094 attached , child_tidptr=0x5555558d8650) = 5094 [pid 5094] set_robust_list(0x5555558d8660, 24) = 0 [pid 5094] chdir("./12") = 0 [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] memfd_create("syzkaller", 0) = 3 [pid 5094] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5094] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5094] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5094] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5094] close(3) = 0 [pid 5094] mkdir("./file1", 0777) = 0 [ 109.426591][ T5094] loop0: detected capacity change from 0 to 512 [ 109.452764][ T5094] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 109.470660][ T5094] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5094] chdir("./file1") = 0 [pid 5094] ioctl(4, LOOP_CLR_FD) = 0 [pid 5094] close(4) = 0 [pid 5094] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5094] creat("./file1", 000) = 4 [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=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 109.476413][ T5094] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. 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, 0x5555558d96f0 /* 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 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 [ 109.609695][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5096 attached , child_tidptr=0x5555558d8650) = 5096 [pid 5096] set_robust_list(0x5555558d8660, 24) = 0 [pid 5096] chdir("./13") = 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 [pid 5096] memfd_create("syzkaller", 0) = 3 [pid 5096] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5096] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5096] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5096] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5096] close(3) = 0 [pid 5096] mkdir("./file1", 0777) = 0 [ 109.818452][ T5096] loop0: detected capacity change from 0 to 512 [ 109.840073][ T5096] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 109.858092][ T5096] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5096] chdir("./file1") = 0 [pid 5096] ioctl(4, LOOP_CLR_FD) = 0 [pid 5096] close(4) = 0 [pid 5096] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5096] creat("./file1", 000) = 4 [ 109.863801][ T5096] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [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=4 /* 0.04 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, 0x5555558d96f0 /* 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 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) [ 109.981308][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5098 attached , child_tidptr=0x5555558d8650) = 5098 [pid 5098] set_robust_list(0x5555558d8660, 24) = 0 [pid 5098] chdir("./14") = 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] memfd_create("syzkaller", 0) = 3 [pid 5098] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5098] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5098] munmap(0x7faa49c86000, 138412032) = 0 [pid 5098] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5098] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5098] close(3) = 0 [pid 5098] mkdir("./file1", 0777) = 0 [ 110.176541][ T5098] loop0: detected capacity change from 0 to 512 [ 110.210201][ T5098] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [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) = 3 [pid 5098] chdir("./file1") = 0 [pid 5098] ioctl(4, LOOP_CLR_FD) = 0 [pid 5098] close(4) = 0 [pid 5098] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5098] creat("./file1", 000) = 4 [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=3 /* 0.03 s */} --- [ 110.227967][ T5098] EXT4-fs (loop0): 1 truncate cleaned up [ 110.233684][ T5098] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 [ 110.346280][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5100 attached , child_tidptr=0x5555558d8650) = 5100 [pid 5100] set_robust_list(0x5555558d8660, 24) = 0 [pid 5100] chdir("./15") = 0 [pid 5100] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5100] setpgid(0, 0) = 0 [pid 5100] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5100] write(3, "1000", 4) = 4 [pid 5100] close(3) = 0 [pid 5100] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5100] memfd_create("syzkaller", 0) = 3 [pid 5100] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5100] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5100] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5100] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5100] close(3) = 0 [pid 5100] mkdir("./file1", 0777) = 0 [ 110.530287][ T5100] loop0: detected capacity change from 0 to 512 [ 110.545653][ T5100] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 110.562939][ T5100] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5100] chdir("./file1") = 0 [pid 5100] ioctl(4, LOOP_CLR_FD) = 0 [pid 5100] close(4) = 0 [pid 5100] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 110.568815][ T5100] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5100] creat("./file1", 000) = 4 [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=6 /* 0.06 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, 0x5555558d96f0 /* 4 entries */, 32768) = 112 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 [ 110.684407][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./15/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5102 attached , child_tidptr=0x5555558d8650) = 5102 [pid 5102] set_robust_list(0x5555558d8660, 24) = 0 [pid 5102] chdir("./16") = 0 [pid 5102] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5102] setpgid(0, 0) = 0 [pid 5102] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5102] write(3, "1000", 4) = 4 [pid 5102] close(3) = 0 [pid 5102] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5102] memfd_create("syzkaller", 0) = 3 [pid 5102] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5102] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5102] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5102] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5102] close(3) = 0 [pid 5102] mkdir("./file1", 0777) = 0 [ 110.901520][ T5102] loop0: detected capacity change from 0 to 512 [ 110.931328][ T5102] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [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) = 3 [pid 5102] chdir("./file1") = 0 [pid 5102] ioctl(4, LOOP_CLR_FD) = 0 [pid 5102] close(4) = 0 [pid 5102] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5102] creat("./file1", 000) = 4 [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=6 /* 0.06 s */} --- umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [ 110.948917][ T5102] EXT4-fs (loop0): 1 truncate cleaned up [ 110.954609][ T5102] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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 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) [ 111.045380][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5104 attached , child_tidptr=0x5555558d8650) = 5104 [pid 5104] set_robust_list(0x5555558d8660, 24) = 0 [pid 5104] chdir("./17") = 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] memfd_create("syzkaller", 0) = 3 [pid 5104] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5104] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5104] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5104] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5104] close(3) = 0 [pid 5104] mkdir("./file1", 0777) = 0 [ 111.287441][ T5104] loop0: detected capacity change from 0 to 512 [ 111.314413][ T5104] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 111.331785][ T5104] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5104] chdir("./file1") = 0 [pid 5104] ioctl(4, LOOP_CLR_FD) = 0 [pid 5104] close(4) = 0 [pid 5104] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5104] creat("./file1", 000) = 4 [pid 5104] exit_group(0) = ? [ 111.337571][ T5104] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [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=3 /* 0.03 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, 0x5555558d96f0 /* 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 umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 111.457080][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5106 attached , child_tidptr=0x5555558d8650) = 5106 [pid 5106] set_robust_list(0x5555558d8660, 24) = 0 [pid 5106] chdir("./18") = 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] memfd_create("syzkaller", 0) = 3 [pid 5106] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5106] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5106] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5106] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5106] close(3) = 0 [pid 5106] mkdir("./file1", 0777) = 0 [ 111.755582][ T5106] loop0: detected capacity change from 0 to 512 [ 111.775516][ T5106] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 111.792936][ T5106] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5106] chdir("./file1") = 0 [pid 5106] ioctl(4, LOOP_CLR_FD) = 0 [pid 5106] close(4) = 0 [pid 5106] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5106] creat("./file1", 000) = 4 [pid 5106] exit_group(0) = ? [ 111.798735][ T5106] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [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("./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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 [ 111.927578][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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 5108 attached , child_tidptr=0x5555558d8650) = 5108 [pid 5108] set_robust_list(0x5555558d8660, 24) = 0 [pid 5108] chdir("./19") = 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] memfd_create("syzkaller", 0) = 3 [pid 5108] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5108] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5108] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5108] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5108] close(3) = 0 [pid 5108] mkdir("./file1", 0777) = 0 [ 112.102734][ T5108] loop0: detected capacity change from 0 to 512 [ 112.122983][ T5108] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 112.140364][ T5108] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5108] chdir("./file1") = 0 [pid 5108] ioctl(4, LOOP_CLR_FD) = 0 [pid 5108] close(4) = 0 [pid 5108] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5108] creat("./file1", 000) = 4 [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=4 /* 0.04 s */} --- umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [ 112.146199][ T5108] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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 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 [ 112.277457][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5110 attached , child_tidptr=0x5555558d8650) = 5110 [pid 5110] set_robust_list(0x5555558d8660, 24) = 0 [pid 5110] chdir("./20") = 0 [pid 5110] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5110] setpgid(0, 0) = 0 [pid 5110] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5110] write(3, "1000", 4) = 4 [pid 5110] close(3) = 0 [pid 5110] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5110] memfd_create("syzkaller", 0) = 3 [pid 5110] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5110] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5110] munmap(0x7faa49c86000, 138412032) = 0 [pid 5110] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5110] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5110] close(3) = 0 [pid 5110] mkdir("./file1", 0777) = 0 [ 112.497979][ T5110] loop0: detected capacity change from 0 to 512 [ 112.514135][ T5110] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 112.531710][ T5110] EXT4-fs (loop0): 1 truncate cleaned up [pid 5110] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5110] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5110] chdir("./file1") = 0 [pid 5110] ioctl(4, LOOP_CLR_FD) = 0 [pid 5110] close(4) = 0 [ 112.538026][ T5110] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5110] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5110] creat("./file1", 000) = 4 [pid 5110] exit_group(0) = ? [pid 5110] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5110, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 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, 0x5555558d96f0 /* 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 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) [ 112.687543][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5112 attached , child_tidptr=0x5555558d8650) = 5112 [pid 5112] set_robust_list(0x5555558d8660, 24) = 0 [pid 5112] chdir("./21") = 0 [pid 5112] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5112] setpgid(0, 0) = 0 [pid 5112] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5112] write(3, "1000", 4) = 4 [pid 5112] close(3) = 0 [pid 5112] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5112] memfd_create("syzkaller", 0) = 3 [pid 5112] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5112] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5112] munmap(0x7faa49c86000, 138412032) = 0 [pid 5112] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5112] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5112] close(3) = 0 [pid 5112] mkdir("./file1", 0777) = 0 [pid 5112] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5112] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5112] chdir("./file1") = 0 [pid 5112] ioctl(4, LOOP_CLR_FD) = 0 [ 112.951145][ T5112] loop0: detected capacity change from 0 to 512 [ 112.962285][ T5112] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 112.980318][ T5112] EXT4-fs (loop0): 1 truncate cleaned up [ 112.986056][ T5112] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5112] close(4) = 0 [pid 5112] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5112] creat("./file1", 000) = 4 [pid 5112] exit_group(0) = ? [pid 5112] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5112, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 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, 0x5555558d96f0 /* 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 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 [ 113.119816][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5114 attached , child_tidptr=0x5555558d8650) = 5114 [pid 5114] set_robust_list(0x5555558d8660, 24) = 0 [pid 5114] chdir("./22") = 0 [pid 5114] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5114] setpgid(0, 0) = 0 [pid 5114] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5114] write(3, "1000", 4) = 4 [pid 5114] close(3) = 0 [pid 5114] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5114] memfd_create("syzkaller", 0) = 3 [pid 5114] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5114] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5114] munmap(0x7faa49c86000, 138412032) = 0 [pid 5114] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5114] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5114] close(3) = 0 [pid 5114] mkdir("./file1", 0777) = 0 [ 113.326212][ T5114] loop0: detected capacity change from 0 to 512 [ 113.344835][ T5114] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 113.362235][ T5114] EXT4-fs (loop0): 1 truncate cleaned up [pid 5114] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5114] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5114] chdir("./file1") = 0 [pid 5114] ioctl(4, LOOP_CLR_FD) = 0 [pid 5114] close(4) = 0 [ 113.368087][ T5114] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5114] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5114] creat("./file1", 000) = 4 [pid 5114] exit_group(0) = ? [pid 5114] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5114, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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 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 [ 113.469235][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./22") = 0 mkdir("./23", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5116 attached [pid 5116] set_robust_list(0x5555558d8660, 24 [pid 5066] <... clone resumed>, child_tidptr=0x5555558d8650) = 5116 [pid 5116] <... set_robust_list resumed>) = 0 [pid 5116] chdir("./23") = 0 [pid 5116] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5116] setpgid(0, 0) = 0 [pid 5116] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5116] write(3, "1000", 4) = 4 [pid 5116] close(3) = 0 [pid 5116] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5116] memfd_create("syzkaller", 0) = 3 [pid 5116] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5116] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5116] munmap(0x7faa49c86000, 138412032) = 0 [pid 5116] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5116] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5116] close(3) = 0 [pid 5116] mkdir("./file1", 0777) = 0 [pid 5116] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5116] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5116] chdir("./file1") = 0 [pid 5116] ioctl(4, LOOP_CLR_FD) = 0 [ 113.686228][ T5116] loop0: detected capacity change from 0 to 512 [ 113.701159][ T5116] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 113.718353][ T5116] EXT4-fs (loop0): 1 truncate cleaned up [ 113.724044][ T5116] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5116] close(4) = 0 [pid 5116] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5116] creat("./file1", 000) = 4 [pid 5116] exit_group(0) = ? [pid 5116] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5116, 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, 0x5555558d96f0 /* 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 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 [ 113.922659][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./23") = 0 mkdir("./24", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5118 attached , child_tidptr=0x5555558d8650) = 5118 [pid 5118] set_robust_list(0x5555558d8660, 24) = 0 [pid 5118] chdir("./24") = 0 [pid 5118] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5118] setpgid(0, 0) = 0 [pid 5118] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5118] write(3, "1000", 4) = 4 [pid 5118] close(3) = 0 [pid 5118] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5118] memfd_create("syzkaller", 0) = 3 [pid 5118] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5118] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5118] munmap(0x7faa49c86000, 138412032) = 0 [pid 5118] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5118] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5118] close(3) = 0 [pid 5118] mkdir("./file1", 0777) = 0 [ 114.137736][ T5118] loop0: detected capacity change from 0 to 512 [ 114.160380][ T5118] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 114.177861][ T5118] EXT4-fs (loop0): 1 truncate cleaned up [pid 5118] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5118] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5118] chdir("./file1") = 0 [pid 5118] ioctl(4, LOOP_CLR_FD) = 0 [pid 5118] close(4) = 0 [pid 5118] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5118] creat("./file1", 000) = 4 [ 114.183552][ T5118] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5118] exit_group(0) = ? [pid 5118] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5118, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- 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, 0x5555558d96f0 /* 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 [ 114.317773][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5120 attached , child_tidptr=0x5555558d8650) = 5120 [pid 5120] set_robust_list(0x5555558d8660, 24) = 0 [pid 5120] chdir("./25") = 0 [pid 5120] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5120] setpgid(0, 0) = 0 [pid 5120] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5120] write(3, "1000", 4) = 4 [pid 5120] close(3) = 0 [pid 5120] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5120] memfd_create("syzkaller", 0) = 3 [pid 5120] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5120] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5120] munmap(0x7faa49c86000, 138412032) = 0 [pid 5120] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5120] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5120] close(3) = 0 [pid 5120] mkdir("./file1", 0777) = 0 [ 114.546603][ T5120] loop0: detected capacity change from 0 to 512 [ 114.568406][ T5120] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 114.587374][ T5120] EXT4-fs (loop0): 1 truncate cleaned up [pid 5120] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5120] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5120] chdir("./file1") = 0 [pid 5120] ioctl(4, LOOP_CLR_FD) = 0 [pid 5120] close(4) = 0 [pid 5120] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5120] creat("./file1", 000) = 4 [pid 5120] exit_group(0) = ? [pid 5120] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5120, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- [ 114.593069][ T5120] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. 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, 0x5555558d96f0 /* 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 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 [ 114.723907][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5122 attached , child_tidptr=0x5555558d8650) = 5122 [pid 5122] set_robust_list(0x5555558d8660, 24) = 0 [pid 5122] chdir("./26") = 0 [pid 5122] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5122] setpgid(0, 0) = 0 [pid 5122] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5122] write(3, "1000", 4) = 4 [pid 5122] close(3) = 0 [pid 5122] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5122] memfd_create("syzkaller", 0) = 3 [pid 5122] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5122] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5122] munmap(0x7faa49c86000, 138412032) = 0 [pid 5122] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5122] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5122] close(3) = 0 [pid 5122] mkdir("./file1", 0777) = 0 [ 114.956464][ T5122] loop0: detected capacity change from 0 to 512 [ 114.974099][ T5122] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 114.991895][ T5122] EXT4-fs (loop0): 1 truncate cleaned up [pid 5122] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5122] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5122] chdir("./file1") = 0 [pid 5122] ioctl(4, LOOP_CLR_FD) = 0 [pid 5122] close(4) = 0 [ 114.997691][ T5122] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5122] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5122] creat("./file1", 000) = 4 [pid 5122] exit_group(0) = ? [pid 5122] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5122, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 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, 0x5555558d96f0 /* 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 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 [ 115.094876][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5125 attached [pid 5125] set_robust_list(0x5555558d8660, 24 [pid 5066] <... clone resumed>, child_tidptr=0x5555558d8650) = 5125 [pid 5125] <... set_robust_list resumed>) = 0 [pid 5125] chdir("./27") = 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] memfd_create("syzkaller", 0) = 3 [pid 5125] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5125] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5125] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5125] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5125] close(3) = 0 [pid 5125] mkdir("./file1", 0777) = 0 [ 115.358914][ T5125] loop0: detected capacity change from 0 to 512 [ 115.376346][ T5125] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 115.393916][ T5125] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5125] chdir("./file1") = 0 [pid 5125] ioctl(4, LOOP_CLR_FD) = 0 [pid 5125] close(4) = 0 [ 115.399668][ T5125] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5125] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5125] creat("./file1", 000) = 4 [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=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, 0x5555558d96f0 /* 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 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 [ 115.547852][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5127 attached , child_tidptr=0x5555558d8650) = 5127 [pid 5127] set_robust_list(0x5555558d8660, 24) = 0 [pid 5127] chdir("./28") = 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] memfd_create("syzkaller", 0) = 3 [pid 5127] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5127] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5127] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5127] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5127] close(3) = 0 [pid 5127] mkdir("./file1", 0777) = 0 [ 115.809007][ T5127] loop0: detected capacity change from 0 to 512 [ 115.824526][ T5127] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 115.841589][ T5127] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5127] chdir("./file1") = 0 [pid 5127] ioctl(4, LOOP_CLR_FD) = 0 [pid 5127] close(4) = 0 [ 115.847355][ T5127] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5127] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5127] creat("./file1", 000) = 4 [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=4 /* 0.04 s */} --- 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file1") = 0 [ 115.992412][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5129 attached , child_tidptr=0x5555558d8650) = 5129 [pid 5129] set_robust_list(0x5555558d8660, 24) = 0 [pid 5129] chdir("./29") = 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] memfd_create("syzkaller", 0) = 3 [pid 5129] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5129] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5129] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5129] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5129] close(3) = 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) = 3 [pid 5129] chdir("./file1") = 0 [pid 5129] ioctl(4, LOOP_CLR_FD) = 0 [pid 5129] close(4) = 0 [pid 5129] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5129] creat("./file1", 000) = 4 [pid 5129] exit_group(0) = ? [pid 5129] +++ exited with 0 +++ [ 116.170959][ T5129] loop0: detected capacity change from 0 to 512 [ 116.182149][ T5129] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 116.199594][ T5129] EXT4-fs (loop0): 1 truncate cleaned up [ 116.205285][ T5129] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5129, 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, 0x5555558d96f0 /* 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 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) [ 116.347329][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5131 attached , child_tidptr=0x5555558d8650) = 5131 [pid 5131] set_robust_list(0x5555558d8660, 24) = 0 [pid 5131] chdir("./30") = 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] memfd_create("syzkaller", 0) = 3 [pid 5131] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5131] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5131] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5131] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5131] close(3) = 0 [pid 5131] mkdir("./file1", 0777) = 0 [ 116.593458][ T5131] loop0: detected capacity change from 0 to 512 [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) = 3 [pid 5131] chdir("./file1") = 0 [pid 5131] ioctl(4, LOOP_CLR_FD) = 0 [pid 5131] close(4) = 0 [pid 5131] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5131] creat("./file1", 000) = 4 [ 116.635251][ T5131] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 116.663080][ T5131] EXT4-fs (loop0): 1 truncate cleaned up [ 116.668876][ T5131] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [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=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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 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) [ 116.841222][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5133 attached , child_tidptr=0x5555558d8650) = 5133 [pid 5133] set_robust_list(0x5555558d8660, 24) = 0 [pid 5133] chdir("./31") = 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] memfd_create("syzkaller", 0) = 3 [pid 5133] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5133] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5133] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5133] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5133] close(3) = 0 [pid 5133] mkdir("./file1", 0777) = 0 [ 117.061478][ T5133] loop0: detected capacity change from 0 to 512 [ 117.078979][ T5133] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 117.097002][ T5133] EXT4-fs (loop0): 1 truncate cleaned up [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) = 3 [pid 5133] chdir("./file1") = 0 [pid 5133] ioctl(4, LOOP_CLR_FD) = 0 [pid 5133] close(4) = 0 [ 117.102692][ T5133] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5133] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5133] creat("./file1", 000) = 4 [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=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 [ 117.229470][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5135 attached , child_tidptr=0x5555558d8650) = 5135 [pid 5135] set_robust_list(0x5555558d8660, 24) = 0 [pid 5135] chdir("./32") = 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] memfd_create("syzkaller", 0) = 3 [pid 5135] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5135] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5135] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5135] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5135] close(3) = 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) = 3 [pid 5135] chdir("./file1") = 0 [pid 5135] ioctl(4, LOOP_CLR_FD) = 0 [pid 5135] close(4) = 0 [ 117.419205][ T5135] loop0: detected capacity change from 0 to 512 [ 117.440658][ T5135] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 117.458472][ T5135] EXT4-fs (loop0): 1 truncate cleaned up [pid 5135] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5135] creat("./file1", 000) = 4 [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("./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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5137 attached , child_tidptr=0x5555558d8650) = 5137 [pid 5137] set_robust_list(0x5555558d8660, 24) = 0 [pid 5137] chdir("./33") = 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] memfd_create("syzkaller", 0) = 3 [pid 5137] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5137] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5137] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5137] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5137] close(3) = 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) = 3 [pid 5137] chdir("./file1") = 0 [pid 5137] ioctl(4, LOOP_CLR_FD) = 0 [pid 5137] close(4) = 0 [pid 5137] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5137] creat("./file1", 000) = 4 [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=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 [ 117.816436][ T5137] loop0: detected capacity change from 0 to 512 [ 117.832394][ T5137] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 117.850140][ T5137] EXT4-fs (loop0): 1 truncate cleaned up 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./33/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5139 attached , child_tidptr=0x5555558d8650) = 5139 [pid 5139] set_robust_list(0x5555558d8660, 24) = 0 [pid 5139] chdir("./34") = 0 [pid 5139] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5139] setpgid(0, 0) = 0 [pid 5139] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5139] write(3, "1000", 4) = 4 [pid 5139] close(3) = 0 [pid 5139] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5139] memfd_create("syzkaller", 0) = 3 [pid 5139] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5139] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5139] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5139] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5139] close(3) = 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) = 3 [pid 5139] chdir("./file1") = 0 [pid 5139] ioctl(4, LOOP_CLR_FD) = 0 [pid 5139] close(4) = 0 [ 118.185631][ T5139] loop0: detected capacity change from 0 to 512 [ 118.196917][ T5139] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 118.225571][ T5139] EXT4-fs (loop0): 1 truncate cleaned up [pid 5139] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5139] creat("./file1", 000) = 4 [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=6 /* 0.06 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./34") = 0 mkdir("./35", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5142 attached , child_tidptr=0x5555558d8650) = 5142 [pid 5142] set_robust_list(0x5555558d8660, 24) = 0 [pid 5142] chdir("./35") = 0 [pid 5142] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5142] setpgid(0, 0) = 0 [pid 5142] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5142] write(3, "1000", 4) = 4 [pid 5142] close(3) = 0 [pid 5142] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5142] memfd_create("syzkaller", 0) = 3 [pid 5142] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5142] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5142] munmap(0x7faa49c86000, 138412032) = 0 [pid 5142] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5142] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5142] close(3) = 0 [pid 5142] mkdir("./file1", 0777) = 0 [pid 5142] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5142] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5142] chdir("./file1") = 0 [pid 5142] ioctl(4, LOOP_CLR_FD) = 0 [pid 5142] close(4) = 0 [pid 5142] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5142] creat("./file1", 000) = 4 [pid 5142] exit_group(0) = ? [ 118.613338][ T5142] loop0: detected capacity change from 0 to 512 [ 118.639498][ T5142] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 118.657072][ T5142] EXT4-fs (loop0): 1 truncate cleaned up [pid 5142] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5142, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./35/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5144 attached , child_tidptr=0x5555558d8650) = 5144 [pid 5144] set_robust_list(0x5555558d8660, 24) = 0 [pid 5144] chdir("./36") = 0 [pid 5144] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5144] setpgid(0, 0) = 0 [pid 5144] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5144] write(3, "1000", 4) = 4 [pid 5144] close(3) = 0 [pid 5144] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5144] memfd_create("syzkaller", 0) = 3 [pid 5144] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5144] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5144] munmap(0x7faa49c86000, 138412032) = 0 [pid 5144] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5144] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5144] close(3) = 0 [pid 5144] mkdir("./file1", 0777) = 0 [ 119.000011][ T5144] loop0: detected capacity change from 0 to 512 [ 119.031903][ T5144] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5144] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5144] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5144] chdir("./file1") = 0 [pid 5144] ioctl(4, LOOP_CLR_FD) = 0 [pid 5144] close(4) = 0 [ 119.049865][ T5144] EXT4-fs (loop0): 1 truncate cleaned up [pid 5144] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5144] creat("./file1", 000) = 4 [pid 5144] exit_group(0) = ? [pid 5144] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5144, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5146 attached , child_tidptr=0x5555558d8650) = 5146 [pid 5146] set_robust_list(0x5555558d8660, 24) = 0 [pid 5146] chdir("./37") = 0 [pid 5146] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5146] setpgid(0, 0) = 0 [pid 5146] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5146] write(3, "1000", 4) = 4 [pid 5146] close(3) = 0 [pid 5146] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5146] memfd_create("syzkaller", 0) = 3 [pid 5146] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5146] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5146] munmap(0x7faa49c86000, 138412032) = 0 [pid 5146] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5146] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5146] close(3) = 0 [pid 5146] mkdir("./file1", 0777) = 0 [pid 5146] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5146] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5146] chdir("./file1") = 0 [pid 5146] ioctl(4, LOOP_CLR_FD) = 0 [pid 5146] close(4) = 0 [pid 5146] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 119.339337][ T5146] loop0: detected capacity change from 0 to 512 [ 119.355413][ T5146] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 119.372479][ T5146] EXT4-fs (loop0): 1 truncate cleaned up [pid 5146] creat("./file1", 000) = 4 [pid 5146] exit_group(0) = ? [pid 5146] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5146, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5148 attached , child_tidptr=0x5555558d8650) = 5148 [pid 5148] set_robust_list(0x5555558d8660, 24) = 0 [pid 5148] chdir("./38") = 0 [pid 5148] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5148] setpgid(0, 0) = 0 [pid 5148] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5148] write(3, "1000", 4) = 4 [pid 5148] close(3) = 0 [pid 5148] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5148] memfd_create("syzkaller", 0) = 3 [pid 5148] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5148] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5148] munmap(0x7faa49c86000, 138412032) = 0 [pid 5148] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5148] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5148] close(3) = 0 [pid 5148] mkdir("./file1", 0777) = 0 [pid 5148] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5148] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5148] chdir("./file1") = 0 [pid 5148] ioctl(4, LOOP_CLR_FD) = 0 [pid 5148] close(4) = 0 [ 119.761614][ T5148] loop0: detected capacity change from 0 to 512 [ 119.773051][ T5148] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 119.791047][ T5148] EXT4-fs (loop0): 1 truncate cleaned up [pid 5148] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5148] creat("./file1", 000) = 4 [pid 5148] exit_group(0) = ? [pid 5148] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5148, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- 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, 0x5555558d96f0 /* 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 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./38") = 0 mkdir("./39", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555558d8650) = 5150 ./strace-static-x86_64: Process 5150 attached [pid 5150] set_robust_list(0x5555558d8660, 24) = 0 [pid 5150] chdir("./39") = 0 [pid 5150] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5150] setpgid(0, 0) = 0 [pid 5150] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5150] write(3, "1000", 4) = 4 [pid 5150] close(3) = 0 [pid 5150] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5150] memfd_create("syzkaller", 0) = 3 [pid 5150] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5150] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5150] munmap(0x7faa49c86000, 138412032) = 0 [pid 5150] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5150] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5150] close(3) = 0 [pid 5150] mkdir("./file1", 0777) = 0 [ 120.036160][ T5150] loop0: detected capacity change from 0 to 512 [ 120.064942][ T5150] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5150] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5150] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5150] chdir("./file1") = 0 [pid 5150] ioctl(4, LOOP_CLR_FD) = 0 [pid 5150] close(4) = 0 [pid 5150] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5150] creat("./file1", 000) = 4 [ 120.082362][ T5150] EXT4-fs (loop0): 1 truncate cleaned up [pid 5150] exit_group(0) = ? [pid 5150] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5150, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./39") = 0 mkdir("./40", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5152 attached , child_tidptr=0x5555558d8650) = 5152 [pid 5152] set_robust_list(0x5555558d8660, 24) = 0 [pid 5152] chdir("./40") = 0 [pid 5152] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5152] setpgid(0, 0) = 0 [pid 5152] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5152] write(3, "1000", 4) = 4 [pid 5152] close(3) = 0 [pid 5152] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5152] memfd_create("syzkaller", 0) = 3 [pid 5152] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5152] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5152] munmap(0x7faa49c86000, 138412032) = 0 [pid 5152] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5152] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5152] close(3) = 0 [pid 5152] mkdir("./file1", 0777) = 0 [pid 5152] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5152] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5152] chdir("./file1") = 0 [pid 5152] ioctl(4, LOOP_CLR_FD) = 0 [pid 5152] close(4) = 0 [pid 5152] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5152] creat("./file1", 000) = 4 [ 120.409615][ T5152] loop0: detected capacity change from 0 to 512 [ 120.430305][ T5152] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 120.448486][ T5152] EXT4-fs (loop0): 1 truncate cleaned up [pid 5152] exit_group(0) = ? [pid 5152] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5152, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5154 attached , child_tidptr=0x5555558d8650) = 5154 [pid 5154] set_robust_list(0x5555558d8660, 24) = 0 [pid 5154] chdir("./41") = 0 [pid 5154] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5154] setpgid(0, 0) = 0 [pid 5154] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5154] write(3, "1000", 4) = 4 [pid 5154] close(3) = 0 [pid 5154] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5154] memfd_create("syzkaller", 0) = 3 [pid 5154] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5154] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5154] munmap(0x7faa49c86000, 138412032) = 0 [pid 5154] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5154] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5154] close(3) = 0 [pid 5154] mkdir("./file1", 0777) = 0 [pid 5154] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5154] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5154] chdir("./file1") = 0 [pid 5154] ioctl(4, LOOP_CLR_FD) = 0 [pid 5154] close(4) = 0 [pid 5154] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5154] creat("./file1", 000) = 4 [ 120.773064][ T5154] loop0: detected capacity change from 0 to 512 [ 120.789660][ T5154] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 120.807222][ T5154] EXT4-fs (loop0): 1 truncate cleaned up [pid 5154] exit_group(0) = ? [pid 5154] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5154, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5156 attached , child_tidptr=0x5555558d8650) = 5156 [pid 5156] set_robust_list(0x5555558d8660, 24) = 0 [pid 5156] chdir("./42") = 0 [pid 5156] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5156] setpgid(0, 0) = 0 [pid 5156] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5156] write(3, "1000", 4) = 4 [pid 5156] close(3) = 0 [pid 5156] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5156] memfd_create("syzkaller", 0) = 3 [pid 5156] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5156] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5156] munmap(0x7faa49c86000, 138412032) = 0 [pid 5156] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5156] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5156] close(3) = 0 [pid 5156] mkdir("./file1", 0777) = 0 [pid 5156] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5156] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5156] chdir("./file1") = 0 [pid 5156] ioctl(4, LOOP_CLR_FD) = 0 [pid 5156] close(4) = 0 [pid 5156] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 121.090486][ T5156] loop0: detected capacity change from 0 to 512 [ 121.107249][ T5156] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 121.125148][ T5156] EXT4-fs (loop0): 1 truncate cleaned up [pid 5156] creat("./file1", 000) = 4 [pid 5156] exit_group(0) = ? [pid 5156] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5156, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./42") = 0 mkdir("./43", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5158 attached , child_tidptr=0x5555558d8650) = 5158 [pid 5158] set_robust_list(0x5555558d8660, 24) = 0 [pid 5158] chdir("./43") = 0 [pid 5158] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5158] setpgid(0, 0) = 0 [pid 5158] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5158] write(3, "1000", 4) = 4 [pid 5158] close(3) = 0 [pid 5158] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5158] memfd_create("syzkaller", 0) = 3 [pid 5158] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5158] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5158] munmap(0x7faa49c86000, 138412032) = 0 [pid 5158] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5158] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5158] close(3) = 0 [pid 5158] mkdir("./file1", 0777) = 0 [pid 5158] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5158] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5158] chdir("./file1") = 0 [pid 5158] ioctl(4, LOOP_CLR_FD) = 0 [pid 5158] close(4) = 0 [pid 5158] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5158] creat("./file1", 000) = 4 [pid 5158] exit_group(0) = ? [pid 5158] +++ exited with 0 +++ [ 121.424700][ T5158] loop0: detected capacity change from 0 to 512 [ 121.441027][ T5158] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 121.460072][ T5158] EXT4-fs (loop0): 1 truncate cleaned up --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5158, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5160 attached , child_tidptr=0x5555558d8650) = 5160 [pid 5160] set_robust_list(0x5555558d8660, 24) = 0 [pid 5160] chdir("./44") = 0 [pid 5160] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5160] setpgid(0, 0) = 0 [pid 5160] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5160] write(3, "1000", 4) = 4 [pid 5160] close(3) = 0 [pid 5160] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5160] memfd_create("syzkaller", 0) = 3 [pid 5160] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5160] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5160] munmap(0x7faa49c86000, 138412032) = 0 [pid 5160] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5160] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5160] close(3) = 0 [pid 5160] mkdir("./file1", 0777) = 0 [pid 5160] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5160] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5160] chdir("./file1") = 0 [pid 5160] ioctl(4, LOOP_CLR_FD) = 0 [pid 5160] close(4) = 0 [pid 5160] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5160] creat("./file1", 000) = 4 [ 121.776668][ T5160] loop0: detected capacity change from 0 to 512 [ 121.802109][ T5160] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 121.820467][ T5160] EXT4-fs (loop0): 1 truncate cleaned up [pid 5160] exit_group(0) = ? [pid 5160] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5160, 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./44/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./44") = 0 mkdir("./45", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5162 attached , child_tidptr=0x5555558d8650) = 5162 [pid 5162] set_robust_list(0x5555558d8660, 24) = 0 [pid 5162] chdir("./45") = 0 [pid 5162] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5162] setpgid(0, 0) = 0 [pid 5162] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5162] write(3, "1000", 4) = 4 [pid 5162] close(3) = 0 [pid 5162] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5162] memfd_create("syzkaller", 0) = 3 [pid 5162] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5162] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5162] munmap(0x7faa49c86000, 138412032) = 0 [pid 5162] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5162] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5162] close(3) = 0 [pid 5162] mkdir("./file1", 0777) = 0 [pid 5162] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5162] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5162] chdir("./file1") = 0 [pid 5162] ioctl(4, LOOP_CLR_FD) = 0 [pid 5162] close(4) = 0 [pid 5162] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5162] creat("./file1", 000) = 4 [ 122.156064][ T5162] loop0: detected capacity change from 0 to 512 [ 122.173475][ T5162] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 122.191198][ T5162] EXT4-fs (loop0): 1 truncate cleaned up [pid 5162] exit_group(0) = ? [pid 5162] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5162, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./45", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5164 attached , child_tidptr=0x5555558d8650) = 5164 [pid 5164] set_robust_list(0x5555558d8660, 24) = 0 [pid 5164] chdir("./46") = 0 [pid 5164] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5164] setpgid(0, 0) = 0 [pid 5164] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5164] write(3, "1000", 4) = 4 [pid 5164] close(3) = 0 [pid 5164] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5164] memfd_create("syzkaller", 0) = 3 [pid 5164] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5164] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5164] munmap(0x7faa49c86000, 138412032) = 0 [pid 5164] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5164] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5164] close(3) = 0 [pid 5164] mkdir("./file1", 0777) = 0 [pid 5164] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5164] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5164] chdir("./file1") = 0 [pid 5164] ioctl(4, LOOP_CLR_FD) = 0 [pid 5164] close(4) = 0 [pid 5164] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 122.522778][ T5164] loop0: detected capacity change from 0 to 512 [ 122.537898][ T5164] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 122.555610][ T5164] EXT4-fs (loop0): 1 truncate cleaned up [pid 5164] creat("./file1", 000) = 4 [pid 5164] exit_group(0) = ? [pid 5164] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5164, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./46/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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, child_tidptr=0x5555558d8650) = 5166 ./strace-static-x86_64: Process 5166 attached [pid 5166] set_robust_list(0x5555558d8660, 24) = 0 [pid 5166] chdir("./47") = 0 [pid 5166] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5166] setpgid(0, 0) = 0 [pid 5166] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5166] write(3, "1000", 4) = 4 [pid 5166] close(3) = 0 [pid 5166] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5166] memfd_create("syzkaller", 0) = 3 [pid 5166] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5166] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5166] munmap(0x7faa49c86000, 138412032) = 0 [pid 5166] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5166] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5166] close(3) = 0 [pid 5166] mkdir("./file1", 0777) = 0 [pid 5166] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5166] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5166] chdir("./file1") = 0 [pid 5166] ioctl(4, LOOP_CLR_FD) = 0 [pid 5166] close(4) = 0 [ 122.858192][ T5166] loop0: detected capacity change from 0 to 512 [ 122.876665][ T5166] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 122.895133][ T5166] EXT4-fs (loop0): 1 truncate cleaned up [pid 5166] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5166] creat("./file1", 000) = 4 [pid 5166] exit_group(0) = ? [pid 5166] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5166, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./47/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5169 attached , child_tidptr=0x5555558d8650) = 5169 [pid 5169] set_robust_list(0x5555558d8660, 24) = 0 [pid 5169] chdir("./48") = 0 [pid 5169] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5169] setpgid(0, 0) = 0 [pid 5169] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5169] write(3, "1000", 4) = 4 [pid 5169] close(3) = 0 [pid 5169] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5169] memfd_create("syzkaller", 0) = 3 [pid 5169] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5169] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5169] munmap(0x7faa49c86000, 138412032) = 0 [pid 5169] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5169] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5169] close(3) = 0 [pid 5169] mkdir("./file1", 0777) = 0 [pid 5169] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5169] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5169] chdir("./file1") = 0 [pid 5169] ioctl(4, LOOP_CLR_FD) = 0 [pid 5169] close(4) = 0 [pid 5169] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 123.239862][ T5169] loop0: detected capacity change from 0 to 512 [ 123.255784][ T5169] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 123.273720][ T5169] EXT4-fs (loop0): 1 truncate cleaned up [pid 5169] creat("./file1", 000) = 4 [pid 5169] exit_group(0) = ? [pid 5169] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5169, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- 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, 0x5555558d96f0 /* 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 getdents64(4, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5171 attached , child_tidptr=0x5555558d8650) = 5171 [pid 5171] set_robust_list(0x5555558d8660, 24) = 0 [pid 5171] chdir("./49") = 0 [pid 5171] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5171] setpgid(0, 0) = 0 [pid 5171] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5171] write(3, "1000", 4) = 4 [pid 5171] close(3) = 0 [pid 5171] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5171] memfd_create("syzkaller", 0) = 3 [pid 5171] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5171] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5171] munmap(0x7faa49c86000, 138412032) = 0 [pid 5171] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5171] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5171] close(3) = 0 [pid 5171] mkdir("./file1", 0777) = 0 [pid 5171] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5171] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5171] chdir("./file1") = 0 [pid 5171] ioctl(4, LOOP_CLR_FD) = 0 [pid 5171] close(4) = 0 [ 123.657536][ T5171] loop0: detected capacity change from 0 to 512 [ 123.683003][ T5171] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 123.700451][ T5171] EXT4-fs (loop0): 1 truncate cleaned up [pid 5171] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5171] creat("./file1", 000) = 4 [pid 5171] exit_group(0) = ? [pid 5171] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5171, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 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, 0x5555558d96f0 /* 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) 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5173 attached , child_tidptr=0x5555558d8650) = 5173 [pid 5173] set_robust_list(0x5555558d8660, 24) = 0 [pid 5173] chdir("./50") = 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] memfd_create("syzkaller", 0) = 3 [pid 5173] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5173] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5173] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5173] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5173] close(3) = 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) = 3 [pid 5173] chdir("./file1") = 0 [pid 5173] ioctl(4, LOOP_CLR_FD) = 0 [pid 5173] close(4) = 0 [pid 5173] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5173] creat("./file1", 000) = 4 [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 */} --- 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, 0x5555558d96f0 /* 4 entries */, 32768) = 112 [ 124.018002][ T5173] loop0: detected capacity change from 0 to 512 [ 124.034800][ T5173] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 124.053598][ T5173] EXT4-fs (loop0): 1 truncate cleaned up 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./50/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./50") = 0 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 5175 attached , child_tidptr=0x5555558d8650) = 5175 [pid 5175] set_robust_list(0x5555558d8660, 24) = 0 [pid 5175] chdir("./51") = 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] memfd_create("syzkaller", 0) = 3 [pid 5175] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5175] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5175] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5175] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5175] close(3) = 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 [ 124.381619][ T5175] loop0: detected capacity change from 0 to 512 [ 124.408674][ T5175] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5175] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5175] chdir("./file1") = 0 [pid 5175] ioctl(4, LOOP_CLR_FD) = 0 [pid 5175] close(4) = 0 [pid 5175] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 124.426659][ T5175] EXT4-fs (loop0): 1 truncate cleaned up [pid 5175] creat("./file1", 000) = 4 [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=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./51/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5177 attached [pid 5177] set_robust_list(0x5555558d8660, 24) = 0 [pid 5177] chdir("./52") = 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 [pid 5066] <... clone resumed>, child_tidptr=0x5555558d8650) = 5177 [pid 5177] <... openat resumed>) = 3 [pid 5177] write(3, "1000", 4) = 4 [pid 5177] close(3) = 0 [pid 5177] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5177] memfd_create("syzkaller", 0) = 3 [pid 5177] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5177] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5177] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5177] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5177] close(3) = 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) = 3 [pid 5177] chdir("./file1") = 0 [pid 5177] ioctl(4, LOOP_CLR_FD) = 0 [pid 5177] close(4) = 0 [pid 5177] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 124.751952][ T5177] loop0: detected capacity change from 0 to 512 [ 124.767231][ T5177] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 124.784112][ T5177] EXT4-fs (loop0): 1 truncate cleaned up [ 124.829253][ T5177] [ 124.831645][ T5177] ====================================================== [ 124.838692][ T5177] WARNING: possible circular locking dependency detected [ 124.845736][ T5177] 6.7.0-rc5-syzkaller #0 Not tainted [ 124.851051][ T5177] ------------------------------------------------------ [ 124.858081][ T5177] syz-executor521/5177 is trying to acquire lock: [ 124.864499][ T5177] ffff8880710b76c0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x173/0x430 [ 124.875026][ T5177] [ 124.875026][ T5177] but task is already holding lock: [ 124.882389][ T5177] ffff8880756f0588 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b94/0x29d0 [ 124.891830][ T5177] [ 124.891830][ T5177] which lock already depends on the new lock. [ 124.891830][ T5177] [ 124.902361][ T5177] [ 124.902361][ T5177] the existing dependency chain (in reverse order) is: [ 124.911392][ T5177] [ 124.911392][ T5177] -> #1 (&ei->i_data_sem/3){++++}-{3:3}: [ 124.919273][ T5177] down_write+0x3a/0x50 [ 124.923994][ T5177] ext4_xattr_set_entry+0x3415/0x3ce0 [ 124.929905][ T5177] ext4_xattr_ibody_set+0x126/0x380 [ 124.935677][ T5177] ext4_xattr_set_handle+0x936/0x1420 [ 124.941630][ T5177] ext4_xattr_set+0x149/0x370 [ 124.946839][ T5177] __vfs_setxattr+0x173/0x1d0 [ 124.952050][ T5177] __vfs_setxattr_noperm+0x127/0x5e0 [ 124.957870][ T5177] __vfs_setxattr_locked+0x17e/0x250 [ 124.963685][ T5177] vfs_setxattr+0x146/0x350 [ 124.968757][ T5177] do_setxattr+0x142/0x170 [ 124.973736][ T5177] setxattr+0x159/0x170 [ 124.978422][ T5177] path_setxattr+0x175/0x1d0 [ 124.983581][ T5177] __x64_sys_setxattr+0xc4/0x160 [ 124.989051][ T5177] do_syscall_64+0x40/0x110 [ 124.994094][ T5177] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 125.000575][ T5177] [ 125.000575][ T5177] -> #0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}: [ 125.008859][ T5177] __lock_acquire+0x2433/0x3b20 [ 125.014267][ T5177] lock_acquire+0x1ae/0x520 [ 125.019309][ T5177] down_write+0x3a/0x50 [ 125.024004][ T5177] ext4_xattr_inode_iget+0x173/0x430 [ 125.029845][ T5177] ext4_xattr_inode_get+0x170/0x840 [ 125.035575][ T5177] ext4_expand_extra_isize_ea+0x125a/0x1b20 [ 125.042010][ T5177] __ext4_expand_extra_isize+0x342/0x470 [ 125.048187][ T5177] __ext4_mark_inode_dirty+0x52b/0x810 [ 125.054181][ T5177] ext4_setattr+0x1c08/0x29d0 [ 125.059390][ T5177] notify_change+0x742/0x11c0 [ 125.064639][ T5177] do_truncate+0x15c/0x220 [ 125.069611][ T5177] path_openat+0x25a0/0x2c50 [ 125.074771][ T5177] do_filp_open+0x1de/0x430 [ 125.079833][ T5177] do_sys_openat2+0x176/0x1e0 [ 125.085035][ T5177] __x64_sys_creat+0xcd/0x120 [ 125.090237][ T5177] do_syscall_64+0x40/0x110 [ 125.095277][ T5177] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 125.101730][ T5177] [ 125.101730][ T5177] other info that might help us debug this: [ 125.101730][ T5177] [ 125.111963][ T5177] Possible unsafe locking scenario: [ 125.111963][ T5177] [ 125.119409][ T5177] CPU0 CPU1 [ 125.124773][ T5177] ---- ---- [ 125.130131][ T5177] lock(&ei->i_data_sem/3); [ 125.134753][ T5177] lock(&ea_inode->i_rwsem#7/1); [ 125.142317][ T5177] lock(&ei->i_data_sem/3); [ 125.149438][ T5177] lock(&ea_inode->i_rwsem#7/1); [ 125.154483][ T5177] [ 125.154483][ T5177] *** DEADLOCK *** [ 125.154483][ T5177] [ 125.162630][ T5177] 5 locks held by syz-executor521/5177: [ 125.168202][ T5177] #0: ffff888078752418 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x2112/0x2c50 [ 125.177462][ T5177] #1: ffff8880756f0700 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0x14b/0x220 [ 125.187788][ T5177] #2: ffff8880756f08a0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xdf1/0x29d0 [ 125.197996][ T5177] #3: ffff8880756f0588 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b94/0x29d0 [ 125.207779][ T5177] #4: ffff8880756f03c8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a1/0x810 [ 125.218089][ T5177] [ 125.218089][ T5177] stack backtrace: [ 125.224071][ T5177] CPU: 0 PID: 5177 Comm: syz-executor521 Not tainted 6.7.0-rc5-syzkaller #0 [ 125.232753][ T5177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 125.242833][ T5177] Call Trace: [ 125.246114][ T5177] [ 125.249051][ T5177] dump_stack_lvl+0xd9/0x1b0 [ 125.253658][ T5177] check_noncircular+0x317/0x400 [ 125.258622][ T5177] ? print_circular_bug+0x5c0/0x5c0 [ 125.263866][ T5177] ? lockdep_lock+0xc6/0x200 [ 125.268473][ T5177] ? hlock_class+0x130/0x130 [ 125.273077][ T5177] __lock_acquire+0x2433/0x3b20 [ 125.277955][ T5177] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 125.283974][ T5177] ? look_up_lock_class+0x59/0x130 [ 125.289121][ T5177] lock_acquire+0x1ae/0x520 [ 125.293660][ T5177] ? ext4_xattr_inode_iget+0x173/0x430 [ 125.299135][ T5177] ? lock_sync+0x190/0x190 [ 125.303570][ T5177] ? preempt_count_sub+0x160/0x160 [ 125.308694][ T5177] down_write+0x3a/0x50 [ 125.312895][ T5177] ? ext4_xattr_inode_iget+0x173/0x430 [ 125.318375][ T5177] ext4_xattr_inode_iget+0x173/0x430 [ 125.323696][ T5177] ext4_xattr_inode_get+0x170/0x840 [ 125.329020][ T5177] ? ext4_xattr_inode_iget+0x430/0x430 [ 125.334519][ T5177] ? rcu_is_watching+0x12/0xb0 [ 125.339310][ T5177] ? trace_kmalloc+0x26/0xa0 [ 125.343952][ T5177] ? __kmalloc_node+0x78/0x90 [ 125.348652][ T5177] ext4_expand_extra_isize_ea+0x125a/0x1b20 [ 125.354580][ T5177] ? ext4_xattr_set+0x370/0x370 [ 125.359462][ T5177] ? lockdep_unlock+0x11b/0x290 [ 125.364336][ T5177] ? preempt_count_sub+0x160/0x160 [ 125.369462][ T5177] ? down_write_trylock+0x1ae/0x3d0 [ 125.374696][ T5177] ? dquot_initialize_needed+0x17d/0x290 [ 125.380368][ T5177] __ext4_expand_extra_isize+0x342/0x470 [ 125.386023][ T5177] __ext4_mark_inode_dirty+0x52b/0x810 [ 125.391502][ T5177] ? ext4_expand_extra_isize+0x600/0x600 [ 125.397167][ T5177] ? lock_sync+0x190/0x190 [ 125.401604][ T5177] ? preempt_count_sub+0x160/0x160 [ 125.406736][ T5177] ext4_setattr+0x1c08/0x29d0 [ 125.411456][ T5177] ? ext4_journalled_write_end+0x1120/0x1120 [ 125.417496][ T5177] notify_change+0x742/0x11c0 [ 125.422297][ T5177] do_truncate+0x15c/0x220 [ 125.426749][ T5177] ? file_open_root+0x450/0x450 [ 125.431644][ T5177] path_openat+0x25a0/0x2c50 [ 125.436267][ T5177] ? path_lookupat+0x770/0x770 [ 125.441397][ T5177] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 125.447405][ T5177] do_filp_open+0x1de/0x430 [ 125.451930][ T5177] ? may_open_dev+0xf0/0xf0 [ 125.456454][ T5177] ? find_held_lock+0x2d/0x110 [ 125.461244][ T5177] ? _raw_spin_unlock+0x28/0x40 [ 125.466113][ T5177] ? alloc_fd+0x2da/0x6c0 [ 125.470476][ T5177] do_sys_openat2+0x176/0x1e0 [ 125.475169][ T5177] ? build_open_flags+0x690/0x690 [ 125.480201][ T5177] ? ptrace_notify+0xf4/0x130 [ 125.484892][ T5177] ? restore_fpregs_from_fpstate+0xc1/0x1d0 [ 125.490810][ T5177] __x64_sys_creat+0xcd/0x120 [ 125.495511][ T5177] ? __x64_compat_sys_openat+0x200/0x200 [ 125.501168][ T5177] ? _raw_spin_unlock_irq+0x2e/0x50 [ 125.506386][ T5177] ? syscall_trace_enter.constprop.0+0xaf/0x1e0 [ 125.512656][ T5177] do_syscall_64+0x40/0x110 [ 125.517186][ T5177] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 125.523139][ T5177] RIP: 0033:0x7faa520c51a9 [ 125.527563][ T5177] 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 [ 125.547184][ T5177] RSP: 002b:00007ffe7deefca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 125.555621][ T5177] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007faa520c51a9 [ 125.563615][ T5177] RDX: 00007faa520c51a9 RSI: 0000000000000000 RDI: 0000000020000400 [ 125.571612][ T5177] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [pid 5177] creat("./file1", 000) = 4 [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=7 /* 0.07 s */} --- umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [ 125.579592][ T5177] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe7deefcf0 [ 125.587591][ T5177] R13: 00007ffe7deefd30 R14: 0000000000040000 R15: 0000000000000003 [ 125.595572][ T5177] newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./52/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./52") = 0 mkdir("./53", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5179 attached , child_tidptr=0x5555558d8650) = 5179 [pid 5179] set_robust_list(0x5555558d8660, 24) = 0 [pid 5179] chdir("./53") = 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] memfd_create("syzkaller", 0) = 3 [pid 5179] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5179] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5179] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5179] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5179] close(3) = 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) = 3 [pid 5179] chdir("./file1") = 0 [pid 5179] ioctl(4, LOOP_CLR_FD) = 0 [pid 5179] close(4) = 0 [pid 5179] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 125.882213][ T5179] loop0: detected capacity change from 0 to 512 [ 125.909139][ T5179] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 125.925283][ T5179] EXT4-fs (loop0): 1 truncate cleaned up [pid 5179] creat("./file1", 000) = 4 [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=5 /* 0.05 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./53/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5182 attached , child_tidptr=0x5555558d8650) = 5182 [pid 5182] set_robust_list(0x5555558d8660, 24) = 0 [pid 5182] chdir("./54") = 0 [pid 5182] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5182] setpgid(0, 0) = 0 [pid 5182] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5182] write(3, "1000", 4) = 4 [pid 5182] close(3) = 0 [pid 5182] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5182] memfd_create("syzkaller", 0) = 3 [pid 5182] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5182] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5182] munmap(0x7faa49c86000, 138412032) = 0 [pid 5182] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5182] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5182] close(3) = 0 [pid 5182] mkdir("./file1", 0777) = 0 [pid 5182] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5182] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5182] chdir("./file1") = 0 [pid 5182] ioctl(4, LOOP_CLR_FD) = 0 [pid 5182] close(4) = 0 [pid 5182] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 126.321829][ T5182] loop0: detected capacity change from 0 to 512 [ 126.331467][ T5182] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 126.347634][ T5182] EXT4-fs (loop0): 1 truncate cleaned up [pid 5182] creat("./file1", 000) = 4 [pid 5182] exit_group(0) = ? [pid 5182] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5182, 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./54/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5184 attached , child_tidptr=0x5555558d8650) = 5184 [pid 5184] set_robust_list(0x5555558d8660, 24) = 0 [pid 5184] chdir("./55") = 0 [pid 5184] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5184] setpgid(0, 0) = 0 [pid 5184] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5184] write(3, "1000", 4) = 4 [pid 5184] close(3) = 0 [pid 5184] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5184] memfd_create("syzkaller", 0) = 3 [pid 5184] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5184] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5184] munmap(0x7faa49c86000, 138412032) = 0 [pid 5184] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5184] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5184] close(3) = 0 [pid 5184] mkdir("./file1", 0777) = 0 [pid 5184] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5184] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5184] chdir("./file1") = 0 [pid 5184] ioctl(4, LOOP_CLR_FD) = 0 [ 126.676256][ T5184] loop0: detected capacity change from 0 to 512 [ 126.700852][ T5184] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 126.717651][ T5184] EXT4-fs (loop0): 1 truncate cleaned up [pid 5184] close(4) = 0 [pid 5184] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5184] creat("./file1", 000) = 4 [pid 5184] exit_group(0) = ? [pid 5184] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5184, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./55/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./55") = 0 mkdir("./56", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555558d8650) = 5186 ./strace-static-x86_64: Process 5186 attached [pid 5186] set_robust_list(0x5555558d8660, 24) = 0 [pid 5186] chdir("./56") = 0 [pid 5186] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5186] setpgid(0, 0) = 0 [pid 5186] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5186] write(3, "1000", 4) = 4 [pid 5186] close(3) = 0 [pid 5186] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5186] memfd_create("syzkaller", 0) = 3 [pid 5186] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5186] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5186] munmap(0x7faa49c86000, 138412032) = 0 [pid 5186] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5186] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5186] close(3) = 0 [pid 5186] mkdir("./file1", 0777) = 0 [pid 5186] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5186] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5186] chdir("./file1") = 0 [pid 5186] ioctl(4, LOOP_CLR_FD) = 0 [pid 5186] close(4) = 0 [pid 5186] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5186] creat("./file1", 000) = 4 [ 127.052142][ T5186] loop0: detected capacity change from 0 to 512 [ 127.066948][ T5186] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 127.083465][ T5186] EXT4-fs (loop0): 1 truncate cleaned up [pid 5186] exit_group(0) = ? [pid 5186] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5186, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./56/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./56") = 0 mkdir("./57", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5188 attached , child_tidptr=0x5555558d8650) = 5188 [pid 5188] set_robust_list(0x5555558d8660, 24) = 0 [pid 5188] chdir("./57") = 0 [pid 5188] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5188] setpgid(0, 0) = 0 [pid 5188] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5188] write(3, "1000", 4) = 4 [pid 5188] close(3) = 0 [pid 5188] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5188] memfd_create("syzkaller", 0) = 3 [pid 5188] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5188] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5188] munmap(0x7faa49c86000, 138412032) = 0 [pid 5188] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5188] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5188] close(3) = 0 [pid 5188] mkdir("./file1", 0777) = 0 [pid 5188] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5188] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5188] chdir("./file1") = 0 [pid 5188] ioctl(4, LOOP_CLR_FD) = 0 [pid 5188] close(4) = 0 [pid 5188] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5188] creat("./file1", 000) = 4 [pid 5188] exit_group(0) = ? [ 127.414233][ T5188] loop0: detected capacity change from 0 to 512 [ 127.423929][ T5188] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 127.439981][ T5188] EXT4-fs (loop0): 1 truncate cleaned up [pid 5188] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5188, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./57/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./57") = 0 mkdir("./58", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5190 attached , child_tidptr=0x5555558d8650) = 5190 [pid 5190] set_robust_list(0x5555558d8660, 24) = 0 [pid 5190] chdir("./58") = 0 [pid 5190] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5190] setpgid(0, 0) = 0 [pid 5190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5190] write(3, "1000", 4) = 4 [pid 5190] close(3) = 0 [pid 5190] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5190] memfd_create("syzkaller", 0) = 3 [pid 5190] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5190] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5190] munmap(0x7faa49c86000, 138412032) = 0 [pid 5190] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5190] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5190] close(3) = 0 [pid 5190] mkdir("./file1", 0777) = 0 [pid 5190] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5190] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5190] chdir("./file1") = 0 [pid 5190] ioctl(4, LOOP_CLR_FD) = 0 [pid 5190] close(4) = 0 [ 127.756223][ T5190] loop0: detected capacity change from 0 to 512 [ 127.771860][ T5190] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 127.787971][ T5190] EXT4-fs (loop0): 1 truncate cleaned up [pid 5190] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5190] creat("./file1", 000) = 4 [pid 5190] exit_group(0) = ? [pid 5190] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5190, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./58/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5192 attached [pid 5192] set_robust_list(0x5555558d8660, 24 [pid 5066] <... clone resumed>, child_tidptr=0x5555558d8650) = 5192 [pid 5192] <... set_robust_list resumed>) = 0 [pid 5192] chdir("./59") = 0 [pid 5192] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5192] setpgid(0, 0) = 0 [pid 5192] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5192] write(3, "1000", 4) = 4 [pid 5192] close(3) = 0 [pid 5192] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5192] memfd_create("syzkaller", 0) = 3 [pid 5192] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5192] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5192] munmap(0x7faa49c86000, 138412032) = 0 [pid 5192] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5192] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5192] close(3) = 0 [pid 5192] mkdir("./file1", 0777) = 0 [pid 5192] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5192] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5192] chdir("./file1") = 0 [pid 5192] ioctl(4, LOOP_CLR_FD) = 0 [pid 5192] close(4) = 0 [pid 5192] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 128.127011][ T5192] loop0: detected capacity change from 0 to 512 [ 128.141976][ T5192] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 128.158971][ T5192] EXT4-fs (loop0): 1 truncate cleaned up [pid 5192] creat("./file1", 000) = 4 [pid 5192] exit_group(0) = ? [pid 5192] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5192, 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./59/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5195 attached [pid 5195] set_robust_list(0x5555558d8660, 24 [pid 5066] <... clone resumed>, child_tidptr=0x5555558d8650) = 5195 [pid 5195] <... set_robust_list resumed>) = 0 [pid 5195] chdir("./60") = 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] memfd_create("syzkaller", 0) = 3 [pid 5195] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5195] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5195] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5195] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5195] close(3) = 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) = 3 [pid 5195] chdir("./file1") = 0 [pid 5195] ioctl(4, LOOP_CLR_FD) = 0 [pid 5195] close(4) = 0 [pid 5195] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5195] creat("./file1", 000) = 4 [ 128.560551][ T5195] loop0: detected capacity change from 0 to 512 [ 128.576073][ T5195] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 128.592425][ T5195] EXT4-fs (loop0): 1 truncate cleaned up [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 */} --- 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./60/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./60") = 0 mkdir("./61", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5197 attached , child_tidptr=0x5555558d8650) = 5197 [pid 5197] set_robust_list(0x5555558d8660, 24) = 0 [pid 5197] chdir("./61") = 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] memfd_create("syzkaller", 0) = 3 [pid 5197] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5197] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5197] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5197] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5197] close(3) = 0 [pid 5197] mkdir("./file1", 0777) = 0 [ 128.882158][ T5197] loop0: detected capacity change from 0 to 512 [ 128.911461][ T5197] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [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) = 3 [pid 5197] chdir("./file1") = 0 [pid 5197] ioctl(4, LOOP_CLR_FD) = 0 [pid 5197] close(4) = 0 [ 128.928024][ T5197] EXT4-fs (loop0): 1 truncate cleaned up [pid 5197] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5197] creat("./file1", 000) = 4 [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=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./61/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5199 attached , child_tidptr=0x5555558d8650) = 5199 [pid 5199] set_robust_list(0x5555558d8660, 24) = 0 [pid 5199] chdir("./62") = 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] memfd_create("syzkaller", 0) = 3 [pid 5199] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5199] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5199] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5199] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5199] close(3) = 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) = 3 [pid 5199] chdir("./file1") = 0 [pid 5199] ioctl(4, LOOP_CLR_FD) = 0 [pid 5199] close(4) = 0 [ 129.186388][ T5199] loop0: detected capacity change from 0 to 512 [ 129.202301][ T5199] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 129.218773][ T5199] EXT4-fs (loop0): 1 truncate cleaned up [pid 5199] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5199] creat("./file1", 000) = 4 [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=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./62", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./62/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./62") = 0 mkdir("./63", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5201 attached , child_tidptr=0x5555558d8650) = 5201 [pid 5201] set_robust_list(0x5555558d8660, 24) = 0 [pid 5201] chdir("./63") = 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] memfd_create("syzkaller", 0) = 3 [pid 5201] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5201] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5201] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5201] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5201] close(3) = 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) = 3 [pid 5201] chdir("./file1") = 0 [pid 5201] ioctl(4, LOOP_CLR_FD) = 0 [ 129.536230][ T5201] loop0: detected capacity change from 0 to 512 [ 129.561204][ T5201] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 129.577801][ T5201] EXT4-fs (loop0): 1 truncate cleaned up [pid 5201] close(4) = 0 [pid 5201] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5201] creat("./file1", 000) = 4 [pid 5201] exit_group(0) = ? [pid 5201] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5201, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./63/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./63") = 0 mkdir("./64", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5203 attached , child_tidptr=0x5555558d8650) = 5203 [pid 5203] set_robust_list(0x5555558d8660, 24) = 0 [pid 5203] chdir("./64") = 0 [pid 5203] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5203] setpgid(0, 0) = 0 [pid 5203] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5203] write(3, "1000", 4) = 4 [pid 5203] close(3) = 0 [pid 5203] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5203] memfd_create("syzkaller", 0) = 3 [pid 5203] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5203] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5203] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5203] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5203] close(3) = 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) = 3 [pid 5203] chdir("./file1") = 0 [pid 5203] ioctl(4, LOOP_CLR_FD) = 0 [pid 5203] close(4) = 0 [ 129.907765][ T5203] loop0: detected capacity change from 0 to 512 [ 129.923160][ T5203] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 129.939892][ T5203] EXT4-fs (loop0): 1 truncate cleaned up [pid 5203] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5203] creat("./file1", 000) = 4 [pid 5203] exit_group(0) = ? [pid 5203] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5203, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./64/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5205 attached , child_tidptr=0x5555558d8650) = 5205 [pid 5205] set_robust_list(0x5555558d8660, 24) = 0 [pid 5205] chdir("./65") = 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] memfd_create("syzkaller", 0) = 3 [pid 5205] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5205] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5205] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5205] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5205] close(3) = 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) = 3 [pid 5205] chdir("./file1") = 0 [pid 5205] ioctl(4, LOOP_CLR_FD) = 0 [pid 5205] close(4) = 0 [pid 5205] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5205] creat("./file1", 000) = 4 [pid 5205] exit_group(0) = ? [ 130.212805][ T5205] loop0: detected capacity change from 0 to 512 [ 130.228092][ T5205] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 130.244951][ T5205] EXT4-fs (loop0): 1 truncate cleaned up [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=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./65/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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./strace-static-x86_64: Process 5207 attached , child_tidptr=0x5555558d8650) = 5207 [pid 5207] set_robust_list(0x5555558d8660, 24) = 0 [pid 5207] chdir("./66") = 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] memfd_create("syzkaller", 0) = 3 [pid 5207] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5207] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5207] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5207] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5207] close(3) = 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) = 3 [pid 5207] chdir("./file1") = 0 [pid 5207] ioctl(4, LOOP_CLR_FD) = 0 [pid 5207] close(4) = 0 [ 130.583949][ T5207] loop0: detected capacity change from 0 to 512 [ 130.597993][ T5207] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 130.617449][ T5207] EXT4-fs (loop0): 1 truncate cleaned up [pid 5207] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5207] creat("./file1", 000) = 4 [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 */} --- 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, 0x5555558d96f0 /* 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 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./66/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5209 attached , child_tidptr=0x5555558d8650) = 5209 [pid 5209] set_robust_list(0x5555558d8660, 24) = 0 [pid 5209] chdir("./67") = 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] memfd_create("syzkaller", 0) = 3 [pid 5209] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5209] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5209] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5209] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5209] close(3) = 0 [pid 5209] mkdir("./file1", 0777) = 0 [ 130.967959][ T5209] loop0: detected capacity change from 0 to 512 [ 130.998378][ T5209] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [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) = 3 [pid 5209] chdir("./file1") = 0 [pid 5209] ioctl(4, LOOP_CLR_FD) = 0 [pid 5209] close(4) = 0 [pid 5209] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 131.015383][ T5209] EXT4-fs (loop0): 1 truncate cleaned up [pid 5209] creat("./file1", 000) = 4 [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=5 /* 0.05 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./67/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5212 attached , child_tidptr=0x5555558d8650) = 5212 [pid 5212] set_robust_list(0x5555558d8660, 24) = 0 [pid 5212] chdir("./68") = 0 [pid 5212] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5212] setpgid(0, 0) = 0 [pid 5212] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5212] write(3, "1000", 4) = 4 [pid 5212] close(3) = 0 [pid 5212] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5212] memfd_create("syzkaller", 0) = 3 [pid 5212] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5212] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5212] munmap(0x7faa49c86000, 138412032) = 0 [pid 5212] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5212] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5212] close(3) = 0 [pid 5212] mkdir("./file1", 0777) = 0 [pid 5212] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5212] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5212] chdir("./file1") = 0 [pid 5212] ioctl(4, LOOP_CLR_FD) = 0 [pid 5212] close(4) = 0 [pid 5212] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5212] creat("./file1", 000) = 4 [pid 5212] exit_group(0) = ? [pid 5212] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5212, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- [ 131.274716][ T5212] loop0: detected capacity change from 0 to 512 [ 131.289865][ T5212] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 131.306434][ T5212] EXT4-fs (loop0): 1 truncate cleaned up 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./68/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5214 attached , child_tidptr=0x5555558d8650) = 5214 [pid 5214] set_robust_list(0x5555558d8660, 24) = 0 [pid 5214] chdir("./69") = 0 [pid 5214] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5214] setpgid(0, 0) = 0 [pid 5214] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5214] write(3, "1000", 4) = 4 [pid 5214] close(3) = 0 [pid 5214] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5214] memfd_create("syzkaller", 0) = 3 [pid 5214] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5214] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5214] munmap(0x7faa49c86000, 138412032) = 0 [pid 5214] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5214] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5214] close(3) = 0 [pid 5214] mkdir("./file1", 0777) = 0 [pid 5214] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5214] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5214] chdir("./file1") = 0 [pid 5214] ioctl(4, LOOP_CLR_FD) = 0 [pid 5214] close(4) = 0 [ 131.602774][ T5214] loop0: detected capacity change from 0 to 512 [ 131.628442][ T5214] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 131.644604][ T5214] EXT4-fs (loop0): 1 truncate cleaned up [pid 5214] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5214] creat("./file1", 000) = 4 [pid 5214] exit_group(0) = ? [pid 5214] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5214, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./69/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5216 attached , child_tidptr=0x5555558d8650) = 5216 [pid 5216] set_robust_list(0x5555558d8660, 24) = 0 [pid 5216] chdir("./70") = 0 [pid 5216] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5216] setpgid(0, 0) = 0 [pid 5216] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5216] write(3, "1000", 4) = 4 [pid 5216] close(3) = 0 [pid 5216] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5216] memfd_create("syzkaller", 0) = 3 [pid 5216] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5216] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5216] munmap(0x7faa49c86000, 138412032) = 0 [pid 5216] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5216] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5216] close(3) = 0 [pid 5216] mkdir("./file1", 0777) = 0 [pid 5216] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5216] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5216] chdir("./file1") = 0 [pid 5216] ioctl(4, LOOP_CLR_FD) = 0 [pid 5216] close(4) = 0 [ 132.051873][ T5216] loop0: detected capacity change from 0 to 512 [ 132.076377][ T5216] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 132.093249][ T5216] EXT4-fs (loop0): 1 truncate cleaned up [pid 5216] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5216] creat("./file1", 000) = 4 [pid 5216] exit_group(0) = ? [pid 5216] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5216, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./70/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5219 attached , child_tidptr=0x5555558d8650) = 5219 [pid 5219] set_robust_list(0x5555558d8660, 24) = 0 [pid 5219] chdir("./71") = 0 [pid 5219] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5219] setpgid(0, 0) = 0 [pid 5219] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5219] write(3, "1000", 4) = 4 [pid 5219] close(3) = 0 [pid 5219] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5219] memfd_create("syzkaller", 0) = 3 [pid 5219] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5219] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5219] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5219] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5219] close(3) = 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) = 3 [pid 5219] chdir("./file1") = 0 [pid 5219] ioctl(4, LOOP_CLR_FD) = 0 [pid 5219] close(4) = 0 [ 132.455327][ T5219] loop0: detected capacity change from 0 to 512 [ 132.470046][ T5219] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 132.486755][ T5219] EXT4-fs (loop0): 1 truncate cleaned up [pid 5219] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5219] creat("./file1", 000) = 4 [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("./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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./71/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5221 attached , child_tidptr=0x5555558d8650) = 5221 [pid 5221] set_robust_list(0x5555558d8660, 24) = 0 [pid 5221] chdir("./72") = 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] memfd_create("syzkaller", 0) = 3 [pid 5221] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5221] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5221] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5221] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5221] close(3) = 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) = 3 [pid 5221] chdir("./file1") = 0 [pid 5221] ioctl(4, LOOP_CLR_FD) = 0 [pid 5221] close(4) = 0 [ 132.808034][ T5221] loop0: detected capacity change from 0 to 512 [ 132.822644][ T5221] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 132.840578][ T5221] EXT4-fs (loop0): 1 truncate cleaned up [pid 5221] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5221] creat("./file1", 000) = 4 [pid 5221] exit_group(0) = ? [pid 5221] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5221, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./72/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./72") = 0 mkdir("./73", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5223 attached , child_tidptr=0x5555558d8650) = 5223 [pid 5223] set_robust_list(0x5555558d8660, 24) = 0 [pid 5223] chdir("./73") = 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] memfd_create("syzkaller", 0) = 3 [pid 5223] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5223] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5223] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5223] close(3) = 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) = 3 [pid 5223] chdir("./file1") = 0 [pid 5223] ioctl(4, LOOP_CLR_FD) = 0 [pid 5223] close(4) = 0 [pid 5223] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 133.113207][ T5223] loop0: detected capacity change from 0 to 512 [ 133.127681][ T5223] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 133.144250][ T5223] EXT4-fs (loop0): 1 truncate cleaned up [pid 5223] creat("./file1", 000) = 4 [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=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./73/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5226 attached , child_tidptr=0x5555558d8650) = 5226 [pid 5226] set_robust_list(0x5555558d8660, 24) = 0 [pid 5226] chdir("./74") = 0 [pid 5226] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5226] setpgid(0, 0) = 0 [pid 5226] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5226] write(3, "1000", 4) = 4 [pid 5226] close(3) = 0 [pid 5226] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5226] memfd_create("syzkaller", 0) = 3 [pid 5226] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5226] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5226] munmap(0x7faa49c86000, 138412032) = 0 [pid 5226] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5226] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5226] close(3) = 0 [pid 5226] mkdir("./file1", 0777) = 0 [pid 5226] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5226] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5226] chdir("./file1") = 0 [pid 5226] ioctl(4, LOOP_CLR_FD) = 0 [pid 5226] close(4) = 0 [pid 5226] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 133.505245][ T5226] loop0: detected capacity change from 0 to 512 [ 133.529879][ T5226] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 133.546242][ T5226] EXT4-fs (loop0): 1 truncate cleaned up [pid 5226] creat("./file1", 000) = 4 [pid 5226] exit_group(0) = ? [pid 5226] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5226, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./74", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./74/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./74") = 0 mkdir("./75", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5228 attached , child_tidptr=0x5555558d8650) = 5228 [pid 5228] set_robust_list(0x5555558d8660, 24) = 0 [pid 5228] chdir("./75") = 0 [pid 5228] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5228] setpgid(0, 0) = 0 [pid 5228] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5228] write(3, "1000", 4) = 4 [pid 5228] close(3) = 0 [pid 5228] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5228] memfd_create("syzkaller", 0) = 3 [pid 5228] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5228] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5228] munmap(0x7faa49c86000, 138412032) = 0 [pid 5228] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5228] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5228] close(3) = 0 [pid 5228] mkdir("./file1", 0777) = 0 [pid 5228] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5228] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5228] chdir("./file1") = 0 [pid 5228] ioctl(4, LOOP_CLR_FD) = 0 [pid 5228] close(4) = 0 [ 133.813227][ T5228] loop0: detected capacity change from 0 to 512 [ 133.838424][ T5228] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 133.854621][ T5228] EXT4-fs (loop0): 1 truncate cleaned up [pid 5228] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [pid 5228] creat("./file1", 000) = 4 [pid 5228] exit_group(0) = ? [pid 5228] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5228, 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./75/file1") = 0 getdents64(3, 0x5555558d96f0 /* 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 5230 attached , child_tidptr=0x5555558d8650) = 5230 [pid 5230] set_robust_list(0x5555558d8660, 24) = 0 [pid 5230] chdir("./76") = 0 [pid 5230] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5230] setpgid(0, 0) = 0 [pid 5230] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5230] write(3, "1000", 4) = 4 [pid 5230] close(3) = 0 [pid 5230] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5230] memfd_create("syzkaller", 0) = 3 [pid 5230] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5230] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5230] munmap(0x7faa49c86000, 138412032) = 0 [pid 5230] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5230] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5230] close(3) = 0 [pid 5230] mkdir("./file1", 0777) = 0 [pid 5230] mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,nogrpid,debug_want_extra_isize=0x0000000000000066,dioread_no"...) = 0 [pid 5230] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5230] chdir("./file1") = 0 [pid 5230] ioctl(4, LOOP_CLR_FD) = 0 [pid 5230] close(4) = 0 [pid 5230] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 134.232935][ T5230] loop0: detected capacity change from 0 to 512 [ 134.247302][ T5230] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 134.274982][ T5230] EXT4-fs (loop0): 1 truncate cleaned up [pid 5230] creat("./file1", 000) = 4 [pid 5230] exit_group(0) = ? [pid 5230] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5230, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- 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, 0x5555558d96f0 /* 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./76/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./76") = 0 mkdir("./77", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5233 attached , child_tidptr=0x5555558d8650) = 5233 [pid 5233] set_robust_list(0x5555558d8660, 24) = 0 [pid 5233] chdir("./77") = 0 [pid 5233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5233] setpgid(0, 0) = 0 [pid 5233] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5233] write(3, "1000", 4) = 4 [pid 5233] close(3) = 0 [pid 5233] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5233] memfd_create("syzkaller", 0) = 3 [pid 5233] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faa49c86000 [pid 5233] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7faa49c86000, 138412032) = 0 [pid 5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5233] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5233] close(3) = 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) = 3 [pid 5233] chdir("./file1") = 0 [pid 5233] ioctl(4, LOOP_CLR_FD) = 0 [pid 5233] close(4) = 0 [pid 5233] setxattr("./file1", "trusted.overlay.upper", "\x00\xfb\x76\x00\x00\xcd\xff\xff\xff\x5b\x8e\xf0\x8d\x43\x4b\x0b\x00\x00\xb2\x52\x00\x21\x64\x1d\x35\xee\xba\x27\x3f\xb1\x7d\x19\x03\x77\x06\xe3\x2a\xbb\xb7\x20\xe5\x4a\xb3\x74\x5b\x25\x5a\xd6\xc2\xd1\xf6\x92\xa2\xf0\x8f\x01\xa9\xce\x1d\x0e\x82\xcb\xbe\x6c\x55\x29\xb2\x55\x4f\x38\x49\xf5\x3f\x0c\x1f\x1f\x51\xad\xf5\x4a\xc8\x01\xcc\x23\xf7\xeb\xd5\x7c\x66\x6b\x5d\x6d\x62\x6d\x33\x36\xb5\x1f\x40\xb9"..., 886, 0) = 0 [ 134.572602][ T5233] loop0: detected capacity change from 0 to 512 [ 134.599892][ T5233] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 134.616457][ T5233] EXT4-fs (loop0): 1 truncate cleaned up [pid 5233] creat("./file1", 000) = 4 [pid 5233] exit_group(0) = ? [pid 5233] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5233, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- 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, 0x5555558d96f0 /* 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) [ 134.766488][ T5066] EXT4-fs unmount: 91 callbacks suppressed [ 134.766505][ T5066] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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, 0x5555558e1730 /* 2 entries */, 32768) = 48 getdents64(4, 0x5555558e1730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./77/file1") = 0 getdents64(3, 0x5555558d96f0 /* 0 entries */, 32768) = 0