./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2470055914 <...> Warning: Permanently added '10.128.1.146' (ED25519) to the list of known hosts. execve("./syz-executor2470055914", ["./syz-executor2470055914"], 0x7ffc20cc6df0 /* 10 vars */) = 0 brk(NULL) = 0x5555563a2000 brk(0x5555563a2d00) = 0x5555563a2d00 arch_prctl(ARCH_SET_FS, 0x5555563a2380) = 0 set_tid_address(0x5555563a2650) = 287 set_robust_list(0x5555563a2660, 24) = 0 rseq(0x5555563a2ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2470055914", 4096) = 28 getrandom("\xfe\xe1\x71\x7a\xb4\x09\xda\x54", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555563a2d00 brk(0x5555563c3d00) = 0x5555563c3d00 brk(0x5555563c4000) = 0x5555563c4000 mprotect(0x7f928fdcd000, 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.NzzT5p", 0700) = 0 chmod("./syzkaller.NzzT5p", 0777) = 0 chdir("./syzkaller.NzzT5p") = 0 mkdir("./0", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 289 ./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x5555563a2660, 24) = 0 [pid 289] chdir("./0") = 0 [pid 289] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 289] setpgid(0, 0) = 0 [pid 289] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 289] write(3, "1000", 4) = 4 [pid 289] close(3) = 0 [pid 289] symlink("/dev/binderfs", "./binderfs") = 0 [pid 289] write(1, "executing program\n", 18executing program ) = 18 [pid 289] memfd_create("syzkaller", 0) = 3 [pid 289] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 289] 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"..., 524288) = 524288 [pid 289] munmap(0x7f928791a000, 138412032) = 0 [pid 289] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 289] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 289] close(3) = 0 [pid 289] close(4) = 0 [pid 289] mkdir("./file1", 0777) = 0 [ 21.663054][ T24] audit: type=1400 audit(1719448852.759:66): avc: denied { execmem } for pid=287 comm="syz-executor247" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.672131][ T24] audit: type=1400 audit(1719448852.769:67): avc: denied { read write } for pid=287 comm="syz-executor247" name="loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.693946][ T24] audit: type=1400 audit(1719448852.769:68): avc: denied { open } for pid=287 comm="syz-executor247" path="/dev/loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.710595][ T289] EXT4-fs (loop0): Ignoring removed orlov option [ 21.729273][ T24] audit: type=1400 audit(1719448852.769:69): avc: denied { ioctl } for pid=287 comm="syz-executor247" path="/dev/loop0" dev="devtmpfs" ino=111 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.729292][ T24] audit: type=1400 audit(1719448852.809:70): avc: denied { mounton } for pid=289 comm="syz-executor247" path="/root/syzkaller.NzzT5p/0/file1" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.741935][ T289] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 289] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 289] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 289] chdir("./file1") = 0 [pid 289] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 289] ioctl(4, LOOP_CLR_FD) = 0 [pid 289] close(4) = 0 [pid 289] chdir("./file0") = 0 [pid 289] creat("./bus", 000) = 4 [pid 289] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 289] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 289] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 289] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 289] exit_group(0) = ? [ 21.840978][ T289] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue [ 21.874587][ T24] audit: type=1400 audit(1719448852.979:71): avc: denied { mount } for pid=289 comm="syz-executor247" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [pid 289] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=289, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./0/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./0/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./0/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./0/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./0/file1/lost+found") = 0 umount2("./0/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./0/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file0/file0") = 0 umount2("./0/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file0/file1") = 0 [ 21.904622][ T24] audit: type=1400 audit(1719448852.999:72): avc: denied { write } for pid=289 comm="syz-executor247" name="file0" dev="loop0" ino=12 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 umount2("./0/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./0/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./0/file1/file0") = 0 umount2("./0/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file1") = 0 umount2("./0/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file2") = 0 umount2("./0/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file3") = 0 umount2("./0/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file1") = -1 EBUSY (Device or resource busy) [ 21.934481][ T24] audit: type=1400 audit(1719448852.999:73): avc: denied { add_name } for pid=289 comm="syz-executor247" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.968023][ T24] audit: type=1400 audit(1719448852.999:74): avc: denied { create } for pid=289 comm="syz-executor247" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 umount2("./0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./0/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./0") = 0 mkdir("./1", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 294 ./strace-static-x86_64: Process 294 attached [pid 294] set_robust_list(0x5555563a2660, 24) = 0 [pid 294] chdir("./1") = 0 [pid 294] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 294] setpgid(0, 0) = 0 [pid 294] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 294] write(3, "1000", 4) = 4 [pid 294] close(3) = 0 [pid 294] symlink("/dev/binderfs", "./binderfs") = 0 [pid 294] write(1, "executing program\n", 18executing program ) = 18 [pid 294] memfd_create("syzkaller", 0) = 3 [pid 294] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 294] 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"..., 524288) = 524288 [pid 294] munmap(0x7f928791a000, 138412032) = 0 [pid 294] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 294] ioctl(4, LOOP_SET_FD, 3) = 0 [ 22.003745][ T24] audit: type=1400 audit(1719448852.999:75): avc: denied { write open } for pid=289 comm="syz-executor247" path="/root/syzkaller.NzzT5p/0/file1/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [pid 294] close(3) = 0 [pid 294] close(4) = 0 [pid 294] mkdir("./file1", 0777) = 0 [ 22.127075][ T294] EXT4-fs (loop0): Ignoring removed orlov option [ 22.134301][ T294] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 294] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 294] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 294] chdir("./file1") = 0 [pid 294] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 294] ioctl(4, LOOP_CLR_FD) = 0 [pid 294] close(4) = 0 [pid 294] chdir("./file0") = 0 [pid 294] creat("./bus", 000) = 4 [pid 294] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 294] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 294] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 294] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 294] exit_group(0) = ? [pid 294] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=294, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./1/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./1/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./1/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./1/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./1/file1/lost+found") = 0 umount2("./1/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./1/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file0/file0") = 0 umount2("./1/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file0/file1") = 0 umount2("./1/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./1/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./1/file1/file0") = 0 umount2("./1/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file1") = 0 umount2("./1/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file2") = 0 umount2("./1/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file3") = 0 umount2("./1/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file1") = -1 EBUSY (Device or resource busy) [ 22.149859][ T294] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./1/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./1") = 0 mkdir("./2", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 298 ./strace-static-x86_64: Process 298 attached [pid 298] set_robust_list(0x5555563a2660, 24) = 0 [pid 298] chdir("./2") = 0 [pid 298] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 298] setpgid(0, 0) = 0 [pid 298] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 298] write(3, "1000", 4) = 4 [pid 298] close(3) = 0 [pid 298] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 298] write(1, "executing program\n", 18) = 18 [pid 298] memfd_create("syzkaller", 0) = 3 [pid 298] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 298] 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"..., 524288) = 524288 [pid 298] munmap(0x7f928791a000, 138412032) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 298] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 298] close(3) = 0 [pid 298] close(4) = 0 [pid 298] mkdir("./file1", 0777) = 0 [pid 298] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 298] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 298] chdir("./file1") = 0 [pid 298] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 298] ioctl(4, LOOP_CLR_FD) = 0 [pid 298] close(4) = 0 [pid 298] chdir("./file0") = 0 [pid 298] creat("./bus", 000) = 4 [pid 298] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 298] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 298] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 298] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 298] exit_group(0) = ? [pid 298] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=298, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./2", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./2/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./2/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./2/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./2/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./2/file1/lost+found") = 0 umount2("./2/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./2/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file0/file0") = 0 umount2("./2/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file0/file1") = 0 umount2("./2/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./2/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 22.328540][ T298] EXT4-fs (loop0): Ignoring removed orlov option [ 22.335974][ T298] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 22.349143][ T298] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue unlink("./2/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 [ 22.402500][ T287] ================================================================== [ 22.410931][ T287] BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xc67/0xc80 [ 22.419045][ T287] Read of size 4 at addr ffff88811e83f000 by task syz-executor247/287 [ 22.427278][ T287] [ 22.429443][ T287] CPU: 1 PID: 287 Comm: syz-executor247 Not tainted 5.10.216-syzkaller-00510-ga4a2b7a82ee4 #0 [ 22.448228][ T287] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 22.462413][ T287] Call Trace: [ 22.466467][ T287] dump_stack_lvl+0x1e2/0x24b [ 22.472451][ T287] ? bfq_pos_tree_add_move+0x43b/0x43b [ 22.479938][ T287] ? panic+0x812/0x812 [ 22.485199][ T287] ? ext4_mark_iloc_dirty+0x2c23/0x3e60 [ 22.491153][ T287] print_address_description+0x81/0x3b0 [ 22.498448][ T287] kasan_report+0x179/0x1c0 [ 22.503882][ T287] ? __ext4_journal_ensure_credits+0x470/0x470 [ 22.510246][ T287] ? ext4_xattr_delete_inode+0xc67/0xc80 [ 22.516758][ T287] ? ext4_xattr_delete_inode+0xc67/0xc80 [ 22.523974][ T287] __asan_report_load4_noabort+0x14/0x20 [ 22.530131][ T287] ext4_xattr_delete_inode+0xc67/0xc80 [ 22.535771][ T287] ? sb_end_intwrite+0x110/0x110 [ 22.540705][ T287] ? ext4_expand_extra_isize_ea+0x1bb0/0x1bb0 [ 22.546828][ T287] ? __kasan_check_read+0x11/0x20 [ 22.551949][ T287] ext4_evict_inode+0x1095/0x1730 [ 22.557303][ T287] ? ext4_inode_is_fast_symlink+0x360/0x360 [ 22.563266][ T287] ? inode_io_list_del_locked+0x1ad/0x210 [ 22.569361][ T287] ? _raw_spin_unlock+0x4d/0x70 [ 22.574406][ T287] ? ext4_inode_is_fast_symlink+0x360/0x360 [ 22.580976][ T287] evict+0x2a3/0x6c0 [ 22.586681][ T287] iput+0x632/0x7e0 [ 22.592420][ T287] vfs_rmdir+0x271/0x3f0 [ 22.596626][ T287] do_rmdir+0x2cf/0x5c0 [ 22.600825][ T287] ? d_delete_notify+0xd0/0xd0 [ 22.606034][ T287] ? strncpy_from_user+0x18e/0x2d0 [ 22.611446][ T287] ? getname_flags+0x1fd/0x520 [ 22.617098][ T287] __x64_sys_rmdir+0x49/0x50 [ 22.622717][ T287] do_syscall_64+0x34/0x70 [ 22.627832][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.634754][ T287] RIP: 0033:0x7f928fd58dc7 [ 22.639451][ T287] Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 54 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 22.662071][ T287] RSP: 002b:00007fff87cf9fb8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 22.673513][ T287] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f928fd58dc7 [ 22.685408][ T287] RDX: 0000000000008890 RSI: 0000000000000000 RDI: 00007fff87cfb160 [ 22.694833][ T287] RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000 [ 22.707690][ T287] R10: 0000000000000100 R11: 0000000000000207 R12: 00007fff87cfb160 [ 22.717496][ T287] R13: 00005555563b3740 R14: 431bde82d7b634db R15: 00007fff87cfd2e0 [ 22.730291][ T287] [ 22.733005][ T287] Allocated by task 263: [ 22.737999][ T287] __kasan_slab_alloc+0xb1/0xe0 [ 22.743665][ T287] slab_post_alloc_hook+0x61/0x2f0 [ 22.749075][ T287] kmem_cache_alloc+0x168/0x2e0 [ 22.755902][ T287] vm_area_dup+0x26/0x270 [ 22.760857][ T287] copy_mm+0x8ac/0x13a0 [ 22.765138][ T287] copy_process+0x1175/0x3340 [ 22.770111][ T287] kernel_clone+0x21e/0x9e0 [ 22.774771][ T287] __x64_sys_clone+0x23f/0x290 [ 22.780909][ T287] do_syscall_64+0x34/0x70 [ 22.785533][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.792228][ T287] [ 22.794654][ T287] Freed by task 274: [ 22.800146][ T287] kasan_set_track+0x4b/0x70 [ 22.804851][ T287] kasan_set_free_info+0x23/0x40 [ 22.810778][ T287] ____kasan_slab_free+0x121/0x160 [ 22.816623][ T287] __kasan_slab_free+0x11/0x20 [ 22.823263][ T287] slab_free_freelist_hook+0xc0/0x190 [ 22.829673][ T287] kmem_cache_free+0xa9/0x1e0 [ 22.834677][ T287] vm_area_free+0x52/0xf0 [ 22.839480][ T287] exit_mmap+0x494/0x5c0 [ 22.844558][ T287] __mmput+0x95/0x2d0 [ 22.849259][ T287] mmput+0x59/0x170 [ 22.853742][ T287] begin_new_exec+0xc70/0x2380 [ 22.858779][ T287] load_elf_binary+0x945/0x2750 [ 22.864525][ T287] bprm_execve+0x81b/0x1600 [ 22.871252][ T287] do_execveat_common+0x959/0xac0 [ 22.876235][ T287] __x64_sys_execve+0x92/0xb0 [ 22.881095][ T287] do_syscall_64+0x34/0x70 [ 22.885716][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.891997][ T287] [ 22.894274][ T287] The buggy address belongs to the object at ffff88811e83f000 [ 22.894274][ T287] which belongs to the cache vm_area_struct of size 232 [ 22.909466][ T287] The buggy address is located 0 bytes inside of [ 22.909466][ T287] 232-byte region [ffff88811e83f000, ffff88811e83f0e8) [ 22.923844][ T287] The buggy address belongs to the page: [ 22.929992][ T287] page:ffffea00047a0fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e83f [ 22.941128][ T287] flags: 0x4000000000000200(slab) [ 22.948124][ T287] raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100191080 [ 22.959151][ T287] raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000 [ 22.969324][ T287] page dumped because: kasan: bad access detected [ 22.977055][ T287] page_owner tracks the page as allocated [ 22.983905][ T287] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 263, ts 17128239748, free_ts 0 [ 23.004521][ T287] prep_new_page+0x166/0x180 [ 23.011004][ T287] get_page_from_freelist+0x2d8c/0x2f30 [ 23.019030][ T287] __alloc_pages_nodemask+0x435/0xaf0 [ 23.030853][ T287] new_slab+0x80/0x400 [ 23.035182][ T287] ___slab_alloc+0x302/0x4b0 [ 23.040289][ T287] __slab_alloc+0x63/0xa0 [ 23.045136][ T287] kmem_cache_alloc+0x1b9/0x2e0 [ 23.052758][ T287] vm_area_dup+0x26/0x270 [ 23.057155][ T287] copy_mm+0x8ac/0x13a0 [ 23.061687][ T287] copy_process+0x1175/0x3340 [ 23.068239][ T287] kernel_clone+0x21e/0x9e0 [ 23.072982][ T287] __x64_sys_clone+0x23f/0x290 [ 23.079158][ T287] do_syscall_64+0x34/0x70 [ 23.084605][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 23.091737][ T287] page_owner free stack trace missing [ 23.100066][ T287] [ 23.102427][ T287] Memory state around the buggy address: [ 23.110388][ T287] ffff88811e83ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.120793][ T287] ffff88811e83ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.133051][ T287] >ffff88811e83f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.143152][ T287] ^ rmdir("./2/file1/file0") = 0 umount2("./2/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file1") = 0 umount2("./2/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file2") = 0 umount2("./2/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file3") = 0 umount2("./2/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file1") = -1 EBUSY (Device or resource busy) [ 23.147827][ T287] ffff88811e83f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.156907][ T287] ffff88811e83f100: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.168373][ T287] ================================================================== [ 23.180482][ T287] Disabling lock debugging due to kernel taint umount2("./2/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./2/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./2") = 0 mkdir("./3", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 303 ./strace-static-x86_64: Process 303 attached [pid 303] set_robust_list(0x5555563a2660, 24) = 0 [pid 303] chdir("./3") = 0 [pid 303] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 303] setpgid(0, 0) = 0 [pid 303] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 303] write(3, "1000", 4) = 4 [pid 303] close(3) = 0 [pid 303] symlink("/dev/binderfs", "./binderfs") = 0 [pid 303] write(1, "executing program\n", 18) = 18 [pid 303] memfd_create("syzkaller", 0) = 3 [pid 303] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 303] 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"..., 524288) = 524288 [pid 303] munmap(0x7f928791a000, 138412032) = 0 [pid 303] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 303] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 303] close(3) = 0 [pid 303] close(4) = 0 [pid 303] mkdir("./file1", 0777) = 0 [ 23.330688][ T303] EXT4-fs (loop0): Ignoring removed orlov option [ 23.337519][ T303] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 303] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 303] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 303] chdir("./file1") = 0 [pid 303] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 303] ioctl(4, LOOP_CLR_FD) = 0 [pid 303] close(4) = 0 [pid 303] chdir("./file0") = 0 [pid 303] creat("./bus", 000) = 4 [pid 303] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 303] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 303] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 303] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 303] exit_group(0) = ? [pid 303] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=303, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./3", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./3/binderfs", MNT_FORCE|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 umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./3/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./3/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./3/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./3/file1/lost+found") = 0 umount2("./3/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./3/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file0/file0") = 0 umount2("./3/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file0/file1") = 0 umount2("./3/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./3/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./3/file1/file0") = 0 umount2("./3/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file1") = 0 umount2("./3/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file2") = 0 umount2("./3/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file3") = 0 umount2("./3/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file1") = -1 EBUSY (Device or resource busy) [ 23.359688][ T303] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./3/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./3") = 0 mkdir("./4", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 308 ./strace-static-x86_64: Process 308 attached [pid 308] set_robust_list(0x5555563a2660, 24) = 0 [pid 308] chdir("./4") = 0 [pid 308] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 308] setpgid(0, 0) = 0 [pid 308] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 308] write(3, "1000", 4) = 4 [pid 308] close(3) = 0 [pid 308] symlink("/dev/binderfs", "./binderfs") = 0 [pid 308] write(1, "executing program\n", 18executing program ) = 18 [pid 308] memfd_create("syzkaller", 0) = 3 [pid 308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 308] 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"..., 524288) = 524288 [pid 308] munmap(0x7f928791a000, 138412032) = 0 [pid 308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 308] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 308] close(3) = 0 [pid 308] close(4) = 0 [pid 308] mkdir("./file1", 0777) = 0 [pid 308] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 308] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 308] chdir("./file1") = 0 [pid 308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 308] ioctl(4, LOOP_CLR_FD) = 0 [pid 308] close(4) = 0 [pid 308] chdir("./file0") = 0 [pid 308] creat("./bus", 000) = 4 [pid 308] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 308] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 308] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 308] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 308] exit_group(0) = ? [pid 308] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=308, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./4", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./4/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./4/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./4/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./4/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./4/file1/lost+found") = 0 umount2("./4/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./4/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file0/file0") = 0 umount2("./4/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file0/file1") = 0 umount2("./4/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./4/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./4/file1/file0") = 0 umount2("./4/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 23.519094][ T308] EXT4-fs (loop0): Ignoring removed orlov option [ 23.526250][ T308] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.540032][ T308] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue unlink("./4/file1/file1") = 0 umount2("./4/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file2") = 0 umount2("./4/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file3") = 0 umount2("./4/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file1") = -1 EBUSY (Device or resource busy) umount2("./4/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./4/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./4") = 0 mkdir("./5", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 312 ./strace-static-x86_64: Process 312 attached [pid 312] set_robust_list(0x5555563a2660, 24) = 0 [pid 312] chdir("./5") = 0 [pid 312] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 312] setpgid(0, 0) = 0 [pid 312] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 312] write(3, "1000", 4) = 4 [pid 312] close(3) = 0 [pid 312] symlink("/dev/binderfs", "./binderfs") = 0 [pid 312] write(1, "executing program\n", 18executing program ) = 18 [pid 312] memfd_create("syzkaller", 0) = 3 [pid 312] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 312] 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"..., 524288) = 524288 [pid 312] munmap(0x7f928791a000, 138412032) = 0 [pid 312] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 312] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 312] close(3) = 0 [pid 312] close(4) = 0 [pid 312] mkdir("./file1", 0777) = 0 [pid 312] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 312] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 312] chdir("./file1") = 0 [pid 312] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 312] ioctl(4, LOOP_CLR_FD) = 0 [pid 312] close(4) = 0 [pid 312] chdir("./file0") = 0 [pid 312] creat("./bus", 000) = 4 [pid 312] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 312] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 312] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 312] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 312] exit_group(0) = ? [pid 312] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=312, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./5", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./5/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./5/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./5/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./5/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 23.716956][ T312] EXT4-fs (loop0): Ignoring removed orlov option [ 23.724688][ T312] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.739643][ T312] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./5/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./5/file1/lost+found") = 0 umount2("./5/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./5/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file0/file0") = 0 umount2("./5/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file0/file1") = 0 umount2("./5/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./5/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./5/file1/file0") = 0 umount2("./5/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file1") = 0 umount2("./5/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file2") = 0 umount2("./5/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file3") = 0 umount2("./5/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file1") = -1 EBUSY (Device or resource busy) umount2("./5/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./5/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./5") = 0 mkdir("./6", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 316 ./strace-static-x86_64: Process 316 attached [pid 316] set_robust_list(0x5555563a2660, 24) = 0 [pid 316] chdir("./6") = 0 [pid 316] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 316] setpgid(0, 0) = 0 [pid 316] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 316] write(3, "1000", 4) = 4 [pid 316] close(3) = 0 [pid 316] symlink("/dev/binderfs", "./binderfs") = 0 [pid 316] write(1, "executing program\n", 18executing program ) = 18 [pid 316] memfd_create("syzkaller", 0) = 3 [pid 316] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 316] 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"..., 524288) = 524288 [pid 316] munmap(0x7f928791a000, 138412032) = 0 [pid 316] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 316] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 316] close(3) = 0 [pid 316] close(4) = 0 [pid 316] mkdir("./file1", 0777) = 0 [pid 316] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 316] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 316] chdir("./file1") = 0 [pid 316] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 316] ioctl(4, LOOP_CLR_FD) = 0 [pid 316] close(4) = 0 [pid 316] chdir("./file0") = 0 [pid 316] creat("./bus", 000) = 4 [pid 316] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 316] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 316] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 316] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 316] exit_group(0) = ? [pid 316] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=316, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./6", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./6/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./6/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./6/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./6/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./6/file1/lost+found") = 0 umount2("./6/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./6/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file0/file0") = 0 umount2("./6/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file0/file1") = 0 umount2("./6/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./6/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./6/file1/file0") = 0 umount2("./6/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file1") = 0 umount2("./6/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file2") = 0 umount2("./6/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file3") = 0 umount2("./6/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file1") = -1 EBUSY (Device or resource busy) [ 23.884623][ T316] EXT4-fs (loop0): Ignoring removed orlov option [ 23.894118][ T316] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.909538][ T316] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./6/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./6/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./6") = 0 mkdir("./7", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 320 ./strace-static-x86_64: Process 320 attached [pid 320] set_robust_list(0x5555563a2660, 24) = 0 [pid 320] chdir("./7") = 0 [pid 320] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 320] setpgid(0, 0) = 0 [pid 320] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 320] write(3, "1000", 4) = 4 [pid 320] close(3) = 0 [pid 320] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 320] write(1, "executing program\n", 18) = 18 [pid 320] memfd_create("syzkaller", 0) = 3 [pid 320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 320] 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"..., 524288) = 524288 [pid 320] munmap(0x7f928791a000, 138412032) = 0 [pid 320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 320] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 320] close(3) = 0 [pid 320] close(4) = 0 [pid 320] mkdir("./file1", 0777) = 0 [pid 320] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 320] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 320] chdir("./file1") = 0 [pid 320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 320] ioctl(4, LOOP_CLR_FD) = 0 [pid 320] close(4) = 0 [pid 320] chdir("./file0") = 0 [pid 320] creat("./bus", 000) = 4 [pid 320] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 320] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 320] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 320] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 320] exit_group(0) = ? [pid 320] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=320, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./7", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./7/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./7/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./7/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./7/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./7/file1/lost+found") = 0 umount2("./7/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./7/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file0/file0") = 0 umount2("./7/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file0/file1") = 0 umount2("./7/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./7/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./7/file1/file0") = 0 umount2("./7/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file1") = 0 umount2("./7/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file2") = 0 umount2("./7/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file3") = 0 umount2("./7/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 24.078199][ T320] EXT4-fs (loop0): Ignoring removed orlov option [ 24.084454][ T320] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.099129][ T320] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue newfstatat(AT_FDCWD, "./7/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file1") = -1 EBUSY (Device or resource busy) umount2("./7/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./7/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./7") = 0 mkdir("./8", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 324 ./strace-static-x86_64: Process 324 attached [pid 324] set_robust_list(0x5555563a2660, 24) = 0 [pid 324] chdir("./8") = 0 [pid 324] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 324] setpgid(0, 0) = 0 [pid 324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 324] write(3, "1000", 4) = 4 [pid 324] close(3) = 0 [pid 324] symlink("/dev/binderfs", "./binderfs"executing program ) = 0 [pid 324] write(1, "executing program\n", 18) = 18 [pid 324] memfd_create("syzkaller", 0) = 3 [pid 324] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 324] 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"..., 524288) = 524288 [pid 324] munmap(0x7f928791a000, 138412032) = 0 [pid 324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 324] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 324] close(3) = 0 [pid 324] close(4) = 0 [pid 324] mkdir("./file1", 0777) = 0 [pid 324] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [ 24.214813][ T324] EXT4-fs (loop0): Ignoring removed orlov option [ 24.223327][ T324] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.239955][ T324] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue [pid 324] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 324] chdir("./file1") = 0 [pid 324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 324] ioctl(4, LOOP_CLR_FD) = 0 [pid 324] close(4) = 0 [pid 324] chdir("./file0") = 0 [pid 324] creat("./bus", 000) = 4 [pid 324] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 324] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 324] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 324] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 324] exit_group(0) = ? [pid 324] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=324, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- umount2("./8", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./8/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./8/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./8/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./8/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./8/file1/lost+found") = 0 umount2("./8/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./8/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file0/file0") = 0 umount2("./8/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file0/file1") = 0 umount2("./8/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./8/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./8/file1/file0") = 0 umount2("./8/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file1") = 0 umount2("./8/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file2") = 0 umount2("./8/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file3") = 0 umount2("./8/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file1") = -1 EBUSY (Device or resource busy) umount2("./8/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./8/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 329 ./strace-static-x86_64: Process 329 attached [pid 329] set_robust_list(0x5555563a2660, 24) = 0 [pid 329] chdir("./9") = 0 [pid 329] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 329] setpgid(0, 0) = 0 [pid 329] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 329] write(3, "1000", 4) = 4 [pid 329] close(3) = 0 [pid 329] symlink("/dev/binderfs", "./binderfs") = 0 [pid 329] write(1, "executing program\n", 18) = 18 [pid 329] memfd_create("syzkaller", 0) = 3 [pid 329] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 329] 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"..., 524288) = 524288 [pid 329] munmap(0x7f928791a000, 138412032) = 0 [pid 329] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 329] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 329] close(3) = 0 [pid 329] close(4) = 0 [pid 329] mkdir("./file1", 0777) = 0 [pid 329] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 329] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 329] chdir("./file1") = 0 [pid 329] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 329] ioctl(4, LOOP_CLR_FD) = 0 [pid 329] close(4) = 0 [pid 329] chdir("./file0") = 0 [pid 329] creat("./bus", 000) = 4 [pid 329] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 329] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 329] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 329] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 329] exit_group(0) = ? [pid 329] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=329, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./9", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./9/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./9/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./9/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./9/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./9/file1/lost+found") = 0 umount2("./9/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./9/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file0/file0") = 0 umount2("./9/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file0/file1") = 0 umount2("./9/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./9/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./9/file1/file0") = 0 umount2("./9/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file1") = 0 umount2("./9/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file2") = 0 umount2("./9/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file3") = 0 umount2("./9/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file1") = -1 EBUSY (Device or resource busy) [ 24.518237][ T329] EXT4-fs (loop0): Ignoring removed orlov option [ 24.525216][ T329] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.539309][ T329] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./9/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./9/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./9") = 0 mkdir("./10", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 333 ./strace-static-x86_64: Process 333 attached [pid 333] set_robust_list(0x5555563a2660, 24) = 0 [pid 333] chdir("./10") = 0 [pid 333] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 333] setpgid(0, 0) = 0 [pid 333] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 333] write(3, "1000", 4) = 4 [pid 333] close(3) = 0 [pid 333] symlink("/dev/binderfs", "./binderfs") = 0 [pid 333] write(1, "executing program\n", 18) = 18 [pid 333] memfd_create("syzkaller", 0) = 3 [pid 333] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 333] 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"..., 524288) = 524288 [pid 333] munmap(0x7f928791a000, 138412032) = 0 [pid 333] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 333] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 333] close(3) = 0 [pid 333] close(4) = 0 [pid 333] mkdir("./file1", 0777) = 0 [ 24.712409][ T333] EXT4-fs (loop0): Ignoring removed orlov option [ 24.719495][ T333] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 333] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 333] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 333] chdir("./file1") = 0 [pid 333] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 333] ioctl(4, LOOP_CLR_FD) = 0 [pid 333] close(4) = 0 [pid 333] chdir("./file0") = 0 [pid 333] creat("./bus", 000) = 4 [pid 333] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 333] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 333] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 333] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 333] exit_group(0) = ? [pid 333] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=333, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./10", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./10/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./10/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./10/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./10/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./10/file1/lost+found") = 0 umount2("./10/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./10/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file0/file0") = 0 umount2("./10/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file0/file1") = 0 umount2("./10/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./10/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./10/file1/file0") = 0 umount2("./10/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file1") = 0 umount2("./10/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 24.739812][ T333] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue unlink("./10/file1/file2") = 0 umount2("./10/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file3") = 0 umount2("./10/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file1") = -1 EBUSY (Device or resource busy) umount2("./10/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./10/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./10") = 0 mkdir("./11", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 337 ./strace-static-x86_64: Process 337 attached [pid 337] set_robust_list(0x5555563a2660, 24) = 0 [pid 337] chdir("./11") = 0 [pid 337] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 337] setpgid(0, 0) = 0 [pid 337] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 337] write(3, "1000", 4) = 4 [pid 337] close(3) = 0 [pid 337] symlink("/dev/binderfs", "./binderfs") = 0 [pid 337] write(1, "executing program\n", 18) = 18 [pid 337] memfd_create("syzkaller", 0) = 3 [pid 337] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 337] 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"..., 524288) = 524288 [pid 337] munmap(0x7f928791a000, 138412032) = 0 [pid 337] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 337] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 337] close(3) = 0 [pid 337] close(4) = 0 [pid 337] mkdir("./file1", 0777) = 0 [pid 337] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 337] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 337] chdir("./file1") = 0 [pid 337] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 337] ioctl(4, LOOP_CLR_FD) = 0 [pid 337] close(4) = 0 [pid 337] chdir("./file0") = 0 [pid 337] creat("./bus", 000) = 4 [pid 337] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 337] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 337] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 337] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 337] exit_group(0) = ? [pid 337] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=337, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- umount2("./11", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./11/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./11/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./11/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./11/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./11/file1/lost+found") = 0 umount2("./11/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./11/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file0/file0") = 0 umount2("./11/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file0/file1") = 0 umount2("./11/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./11/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./11/file1/file0") = 0 umount2("./11/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file1") = 0 umount2("./11/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file2") = 0 umount2("./11/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file3") = 0 umount2("./11/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file1") = -1 EBUSY (Device or resource busy) [ 24.911135][ T337] EXT4-fs (loop0): Ignoring removed orlov option [ 24.917693][ T337] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.929360][ T337] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./11/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./11/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 341 ./strace-static-x86_64: Process 341 attached [pid 341] set_robust_list(0x5555563a2660, 24) = 0 [pid 341] chdir("./12") = 0 [pid 341] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 341] setpgid(0, 0) = 0 [pid 341] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 341] write(3, "1000", 4) = 4 [pid 341] close(3) = 0 [pid 341] symlink("/dev/binderfs", "./binderfs") = 0 [pid 341] write(1, "executing program\n", 18) = 18 [pid 341] memfd_create("syzkaller", 0) = 3 [pid 341] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 341] 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"..., 524288) = 524288 [pid 341] munmap(0x7f928791a000, 138412032) = 0 [pid 341] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 341] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 341] close(3) = 0 [pid 341] close(4) = 0 [pid 341] mkdir("./file1", 0777) = 0 [pid 341] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 341] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 341] chdir("./file1") = 0 [pid 341] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 341] ioctl(4, LOOP_CLR_FD) = 0 [pid 341] close(4) = 0 [pid 341] chdir("./file0") = 0 [pid 341] creat("./bus", 000) = 4 [pid 341] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 341] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 341] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 341] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 341] exit_group(0) = ? [pid 341] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=341, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./12", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./12/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./12/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./12/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./12/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./12/file1/lost+found") = 0 umount2("./12/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./12/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file0/file0") = 0 umount2("./12/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file0/file1") = 0 umount2("./12/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./12/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./12/file1/file0") = 0 umount2("./12/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file1") = 0 umount2("./12/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file2") = 0 umount2("./12/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file3") = 0 umount2("./12/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file1") = -1 EBUSY (Device or resource busy) [ 25.099617][ T341] EXT4-fs (loop0): Ignoring removed orlov option [ 25.106422][ T341] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.119402][ T341] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./12/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./12/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./12") = 0 mkdir("./13", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 345 ./strace-static-x86_64: Process 345 attached [pid 345] set_robust_list(0x5555563a2660, 24) = 0 [pid 345] chdir("./13") = 0 [pid 345] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 345] setpgid(0, 0) = 0 [pid 345] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 345] write(3, "1000", 4) = 4 [pid 345] close(3) = 0 [pid 345] symlink("/dev/binderfs", "./binderfs") = 0 [pid 345] write(1, "executing program\n", 18executing program ) = 18 [pid 345] memfd_create("syzkaller", 0) = 3 [pid 345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 345] 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"..., 524288) = 524288 [pid 345] munmap(0x7f928791a000, 138412032) = 0 [pid 345] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 345] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 345] close(3) = 0 [pid 345] close(4) = 0 [pid 345] mkdir("./file1", 0777) = 0 [pid 345] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 345] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 345] chdir("./file1") = 0 [pid 345] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 345] ioctl(4, LOOP_CLR_FD) = 0 [pid 345] close(4) = 0 [pid 345] chdir("./file0") = 0 [pid 345] creat("./bus", 000) = 4 [pid 345] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 345] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 345] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 345] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 345] exit_group(0) = ? [pid 345] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=345, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./13", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./13/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./13/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./13/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./13/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 [ 25.233411][ T345] EXT4-fs (loop0): Ignoring removed orlov option [ 25.239945][ T345] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.259595][ T345] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./13/file1/lost+found") = 0 umount2("./13/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./13/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file0/file0") = 0 umount2("./13/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file0/file1") = 0 umount2("./13/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./13/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./13/file1/file0") = 0 umount2("./13/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file1") = 0 umount2("./13/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file2") = 0 umount2("./13/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file3") = 0 umount2("./13/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file1") = -1 EBUSY (Device or resource busy) umount2("./13/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./13/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 350 ./strace-static-x86_64: Process 350 attached [pid 350] set_robust_list(0x5555563a2660, 24) = 0 [pid 350] chdir("./14") = 0 [pid 350] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 350] setpgid(0, 0) = 0 [pid 350] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 350] write(3, "1000", 4) = 4 [pid 350] close(3) = 0 [pid 350] symlink("/dev/binderfs", "./binderfs") = 0 [pid 350] write(1, "executing program\n", 18) = 18 [pid 350] memfd_create("syzkaller", 0) = 3 [pid 350] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 350] 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"..., 524288) = 524288 [pid 350] munmap(0x7f928791a000, 138412032) = 0 [pid 350] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 350] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 350] close(3) = 0 [pid 350] close(4) = 0 [pid 350] mkdir("./file1", 0777) = 0 [pid 350] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 350] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 350] chdir("./file1") = 0 [pid 350] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 350] ioctl(4, LOOP_CLR_FD) = 0 [pid 350] close(4) = 0 [pid 350] chdir("./file0") = 0 [pid 350] creat("./bus", 000) = 4 [pid 350] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 350] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 350] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 350] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 350] exit_group(0) = ? [pid 350] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=350, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./14", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./14/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./14/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./14/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./14/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./14/file1/lost+found") = 0 umount2("./14/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./14/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file0/file0") = 0 umount2("./14/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file0/file1") = 0 umount2("./14/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./14/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./14/file1/file0") = 0 umount2("./14/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file1") = 0 umount2("./14/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file2") = 0 [ 25.480451][ T350] EXT4-fs (loop0): Ignoring removed orlov option [ 25.487127][ T350] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.499282][ T350] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./14/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file3") = 0 umount2("./14/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file1") = -1 EBUSY (Device or resource busy) umount2("./14/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./14/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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_FDexecuting program ) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 354 ./strace-static-x86_64: Process 354 attached [pid 354] set_robust_list(0x5555563a2660, 24) = 0 [pid 354] chdir("./15") = 0 [pid 354] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 354] setpgid(0, 0) = 0 [pid 354] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 354] write(3, "1000", 4) = 4 [pid 354] close(3) = 0 [pid 354] symlink("/dev/binderfs", "./binderfs") = 0 [pid 354] write(1, "executing program\n", 18) = 18 [pid 354] memfd_create("syzkaller", 0) = 3 [pid 354] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 354] 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"..., 524288) = 524288 [pid 354] munmap(0x7f928791a000, 138412032) = 0 [pid 354] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 354] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 354] close(3) = 0 [pid 354] close(4) = 0 [pid 354] mkdir("./file1", 0777) = 0 [ 25.712256][ T354] EXT4-fs (loop0): Ignoring removed orlov option [ 25.719624][ T354] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 354] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 354] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 354] chdir("./file1") = 0 [pid 354] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 354] ioctl(4, LOOP_CLR_FD) = 0 [pid 354] close(4) = 0 [pid 354] chdir("./file0") = 0 [pid 354] creat("./bus", 000) = 4 [pid 354] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 354] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 354] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 354] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 354] exit_group(0) = ? [pid 354] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=354, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./15", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./15/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./15/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./15/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./15/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./15/file1/lost+found") = 0 umount2("./15/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./15/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file0/file0") = 0 umount2("./15/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file0/file1") = 0 umount2("./15/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./15/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./15/file1/file0") = 0 umount2("./15/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file1") = 0 umount2("./15/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file2") = 0 umount2("./15/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file3") = 0 umount2("./15/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./15/file1") = -1 EBUSY (Device or resource busy) [ 25.739169][ T354] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./15/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./15/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./15") = 0 mkdir("./16", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 358 ./strace-static-x86_64: Process 358 attached [pid 358] set_robust_list(0x5555563a2660, 24) = 0 [pid 358] chdir("./16") = 0 [pid 358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 358] setpgid(0, 0) = 0 [pid 358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 358] write(3, "1000", 4) = 4 [pid 358] close(3) = 0 [pid 358] symlink("/dev/binderfs", "./binderfs") = 0 [pid 358] write(1, "executing program\n", 18executing program ) = 18 [pid 358] memfd_create("syzkaller", 0) = 3 [pid 358] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 358] 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"..., 524288) = 524288 [pid 358] munmap(0x7f928791a000, 138412032) = 0 [pid 358] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 358] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 358] close(3) = 0 [pid 358] close(4) = 0 [pid 358] mkdir("./file1", 0777) = 0 [ 25.951362][ T358] EXT4-fs (loop0): Ignoring removed orlov option [ 25.959082][ T358] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 358] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 358] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 358] chdir("./file1") = 0 [pid 358] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 358] ioctl(4, LOOP_CLR_FD) = 0 [pid 358] close(4) = 0 [pid 358] chdir("./file0") = 0 [pid 358] creat("./bus", 000) = 4 [pid 358] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 358] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 358] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 358] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 358] exit_group(0) = ? [pid 358] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=358, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./16", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./16/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./16/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./16/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./16/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./16/file1/lost+found") = 0 umount2("./16/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./16/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file0/file0") = 0 umount2("./16/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file0/file1") = 0 umount2("./16/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./16/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./16/file1/file0") = 0 umount2("./16/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 25.980318][ T358] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue unlink("./16/file1/file1") = 0 umount2("./16/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file2") = 0 umount2("./16/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file3") = 0 umount2("./16/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file1") = -1 EBUSY (Device or resource busy) umount2("./16/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./16/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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|SIGCHLDexecuting program , child_tidptr=0x5555563a2650) = 362 ./strace-static-x86_64: Process 362 attached [pid 362] set_robust_list(0x5555563a2660, 24) = 0 [pid 362] chdir("./17") = 0 [pid 362] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 362] setpgid(0, 0) = 0 [pid 362] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 362] write(3, "1000", 4) = 4 [pid 362] close(3) = 0 [pid 362] symlink("/dev/binderfs", "./binderfs") = 0 [pid 362] write(1, "executing program\n", 18) = 18 [pid 362] memfd_create("syzkaller", 0) = 3 [pid 362] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 362] 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"..., 524288) = 524288 [pid 362] munmap(0x7f928791a000, 138412032) = 0 [pid 362] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 362] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 362] close(3) = 0 [pid 362] close(4) = 0 [pid 362] mkdir("./file1", 0777) = 0 [ 26.230613][ T362] EXT4-fs (loop0): Ignoring removed orlov option [ 26.237629][ T362] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 362] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 362] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 362] chdir("./file1") = 0 [pid 362] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 362] ioctl(4, LOOP_CLR_FD) = 0 [pid 362] close(4) = 0 [pid 362] chdir("./file0") = 0 [pid 362] creat("./bus", 000) = 4 [pid 362] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 362] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 362] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 362] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 362] exit_group(0) = ? [pid 362] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=362, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- umount2("./17", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./17/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./17/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./17/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./17/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./17/file1/lost+found") = 0 umount2("./17/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./17/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file0/file0") = 0 umount2("./17/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 26.259653][ T362] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue newfstatat(AT_FDCWD, "./17/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file0/file1") = 0 umount2("./17/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./17/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./17/file1/file0") = 0 umount2("./17/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file1") = 0 umount2("./17/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file2") = 0 umount2("./17/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file3") = 0 umount2("./17/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file1") = -1 EBUSY (Device or resource busy) umount2("./17/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./17/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./17") = 0 mkdir("./18", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 367 ./strace-static-x86_64: Process 367 attached [pid 367] set_robust_list(0x5555563a2660, 24) = 0 [pid 367] chdir("./18") = 0 [pid 367] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 367] setpgid(0, 0) = 0 [pid 367] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 367] write(3, "1000", 4) = 4 [pid 367] close(3) = 0 [pid 367] symlink("/dev/binderfs", "./binderfs") = 0 [pid 367] write(1, "executing program\n", 18) = 18 [pid 367] memfd_create("syzkaller", 0) = 3 [pid 367] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 executing program [pid 367] 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"..., 524288) = 524288 [pid 367] munmap(0x7f928791a000, 138412032) = 0 [pid 367] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 367] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 367] close(3) = 0 [pid 367] close(4) = 0 [pid 367] mkdir("./file1", 0777) = 0 [ 26.472370][ T367] EXT4-fs (loop0): Ignoring removed orlov option [ 26.480437][ T367] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 367] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 367] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 367] chdir("./file1") = 0 [pid 367] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 367] ioctl(4, LOOP_CLR_FD) = 0 [pid 367] close(4) = 0 [pid 367] chdir("./file0") = 0 [pid 367] creat("./bus", 000) = 4 [pid 367] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 367] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 367] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 367] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 367] exit_group(0) = ? [pid 367] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=367, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./18", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./18/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./18/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./18/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./18/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./18/file1/lost+found") = 0 umount2("./18/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./18/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file0/file0") = 0 umount2("./18/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file0/file1") = 0 umount2("./18/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./18/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./18/file1/file0") = 0 umount2("./18/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file1") = 0 umount2("./18/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file2") = 0 umount2("./18/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file3") = 0 umount2("./18/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file1") = -1 EBUSY (Device or resource busy) [ 26.499648][ T367] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./18/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./18/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./18") = 0 mkdir("./19", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 371 ./strace-static-x86_64: Process 371 attached [pid 371] set_robust_list(0x5555563a2660, 24) = 0 [pid 371] chdir("./19") = 0 [pid 371] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 371] setpgid(0, 0) = 0 [pid 371] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 371] write(3, "1000", 4) = 4 [pid 371] close(3) = 0 [pid 371] symlink("/dev/binderfs", "./binderfs") = 0 [pid 371] write(1, "executing program\n", 18) = 18 [pid 371] memfd_create("syzkaller", 0) = 3 [pid 371] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 371] 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"..., 524288) = 524288 [pid 371] munmap(0x7f928791a000, 138412032) = 0 [pid 371] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 371] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 371] close(3) = 0 [pid 371] close(4) = 0 [pid 371] mkdir("./file1", 0777) = 0 [pid 371] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 371] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 371] chdir("./file1") = 0 [pid 371] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 371] ioctl(4, LOOP_CLR_FD) = 0 [pid 371] close(4) = 0 [pid 371] chdir("./file0") = 0 [pid 371] creat("./bus", 000) = 4 [pid 371] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 371] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 371] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 371] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 371] exit_group(0) = ? [pid 371] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=371, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./19", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./19/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./19/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./19/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./19/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./19/file1/lost+found") = 0 umount2("./19/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./19/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file0/file0") = 0 umount2("./19/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file0/file1") = 0 umount2("./19/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 [ 26.642102][ T371] EXT4-fs (loop0): Ignoring removed orlov option [ 26.648744][ T371] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.659077][ T371] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./19/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./19/file1/file0") = 0 umount2("./19/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file1") = 0 umount2("./19/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file2") = 0 umount2("./19/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file3") = 0 umount2("./19/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file1") = -1 EBUSY (Device or resource busy) umount2("./19/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./19/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 375 ./strace-static-x86_64: Process 375 attached [pid 375] set_robust_list(0x5555563a2660, 24) = 0 [pid 375] chdir("./20") = 0 [pid 375] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 375] setpgid(0, 0) = 0 [pid 375] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 375] write(3, "1000", 4) = 4 [pid 375] close(3) = 0 [pid 375] symlink("/dev/binderfs", "./binderfs") = 0 [pid 375] write(1, "executing program\n", 18executing program ) = 18 [pid 375] memfd_create("syzkaller", 0) = 3 [pid 375] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 375] 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"..., 524288) = 524288 [pid 375] munmap(0x7f928791a000, 138412032) = 0 [pid 375] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 375] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 375] close(3) = 0 [pid 375] close(4) = 0 [pid 375] mkdir("./file1", 0777) = 0 [pid 375] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 375] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 375] chdir("./file1") = 0 [pid 375] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 375] ioctl(4, LOOP_CLR_FD) = 0 [pid 375] close(4) = 0 [pid 375] chdir("./file0") = 0 [pid 375] creat("./bus", 000) = 4 [pid 375] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 375] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 375] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 375] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 375] exit_group(0) = ? [pid 375] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=375, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./20", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./20/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./20/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./20/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./20/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./20/file1/lost+found") = 0 umount2("./20/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./20/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 26.787382][ T375] EXT4-fs (loop0): Ignoring removed orlov option [ 26.793962][ T375] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.809564][ T375] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue newfstatat(AT_FDCWD, "./20/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file0/file0") = 0 umount2("./20/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file0/file1") = 0 umount2("./20/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./20/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./20/file1/file0") = 0 umount2("./20/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file1") = 0 umount2("./20/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file2") = 0 umount2("./20/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file3") = 0 umount2("./20/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file1") = -1 EBUSY (Device or resource busy) umount2("./20/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./20/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./20") = 0 mkdir("./21", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 379 ./strace-static-x86_64: Process 379 attached [pid 379] set_robust_list(0x5555563a2660, 24) = 0 [pid 379] chdir("./21") = 0 [pid 379] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 379] setpgid(0, 0) = 0 [pid 379] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 379] write(3, "1000", 4) = 4 [pid 379] close(3) = 0 [pid 379] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 379] write(1, "executing program\n", 18) = 18 [pid 379] memfd_create("syzkaller", 0) = 3 [pid 379] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 379] 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"..., 524288) = 524288 [pid 379] munmap(0x7f928791a000, 138412032) = 0 [pid 379] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 379] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 379] close(3) = 0 [pid 379] close(4) = 0 [pid 379] mkdir("./file1", 0777) = 0 [ 26.932725][ T379] EXT4-fs (loop0): Ignoring removed orlov option [ 26.939639][ T379] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 379] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 379] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 379] chdir("./file1") = 0 [pid 379] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 379] ioctl(4, LOOP_CLR_FD) = 0 [pid 379] close(4) = 0 [pid 379] chdir("./file0") = 0 [pid 379] creat("./bus", 000) = 4 [pid 379] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 379] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 379] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 379] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 379] exit_group(0) = ? [pid 379] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=379, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./21", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./21/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./21/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./21/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./21/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./21/file1/lost+found") = 0 umount2("./21/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./21/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file0/file0") = 0 umount2("./21/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file0/file1") = 0 umount2("./21/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./21/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./21/file1/file0") = 0 umount2("./21/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file1") = 0 umount2("./21/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file2") = 0 umount2("./21/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file3") = 0 umount2("./21/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file1") = -1 EBUSY (Device or resource busy) [ 26.960120][ T379] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./21/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./21/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 383 ./strace-static-x86_64: Process 383 attached [pid 383] set_robust_list(0x5555563a2660, 24) = 0 [pid 383] chdir("./22") = 0 [pid 383] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 383] setpgid(0, 0) = 0 [pid 383] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 383] write(3, "1000", 4) = 4 [pid 383] close(3) = 0 [pid 383] symlink("/dev/binderfs", "./binderfs") = 0 [pid 383] write(1, "executing program\n", 18) = 18 [pid 383] memfd_create("syzkaller", 0) = 3 [pid 383] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 383] 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"..., 524288) = 524288 [pid 383] munmap(0x7f928791a000, 138412032) = 0 [pid 383] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 383] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 383] close(3) = 0 [pid 383] close(4) = 0 [pid 383] mkdir("./file1", 0777) = 0 [pid 383] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 383] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 383] chdir("./file1") = 0 [pid 383] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 383] ioctl(4, LOOP_CLR_FD) = 0 [pid 383] close(4) = 0 [pid 383] chdir("./file0") = 0 [pid 383] creat("./bus", 000) = 4 [pid 383] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 383] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 383] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 383] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 383] exit_group(0) = ? [pid 383] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=383, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./22", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./22/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./22/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./22/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./22/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./22/file1/lost+found") = 0 umount2("./22/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./22/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file0/file0") = 0 umount2("./22/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file0/file1") = 0 umount2("./22/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./22/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./22/file1/file0") = 0 umount2("./22/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file1") = 0 umount2("./22/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file2") = 0 umount2("./22/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file3") = 0 umount2("./22/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file1") = -1 EBUSY (Device or resource busy) [ 27.128209][ T383] EXT4-fs (loop0): Ignoring removed orlov option [ 27.134802][ T383] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.149201][ T383] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./22/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./22/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./22") = 0 mkdir("./23", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 387 ./strace-static-x86_64: Process 387 attached [pid 387] set_robust_list(0x5555563a2660, 24) = 0 [pid 387] chdir("./23") = 0 [pid 387] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 387] setpgid(0, 0) = 0 [pid 387] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 387] write(3, "1000", 4) = 4 [pid 387] close(3) = 0 [pid 387] symlink("/dev/binderfs", "./binderfs") = 0 [pid 387] write(1, "executing program\n", 18) = 18 [pid 387] memfd_create("syzkaller", 0) = 3 [pid 387] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 executing program [pid 387] 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"..., 524288) = 524288 [pid 387] munmap(0x7f928791a000, 138412032) = 0 [pid 387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 387] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 387] close(3) = 0 [pid 387] close(4) = 0 [pid 387] mkdir("./file1", 0777) = 0 [pid 387] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 387] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 387] chdir("./file1") = 0 [pid 387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 387] ioctl(4, LOOP_CLR_FD) = 0 [pid 387] close(4) = 0 [pid 387] chdir("./file0") = 0 [pid 387] creat("./bus", 000) = 4 [pid 387] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 387] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 387] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 387] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 387] exit_group(0) = ? [pid 387] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=387, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./23", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./23/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./23/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./23/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./23/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./23/file1/lost+found") = 0 umount2("./23/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./23/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file0/file0") = 0 umount2("./23/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file0/file1") = 0 umount2("./23/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./23/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./23/file1/file0") = 0 umount2("./23/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file1") = 0 umount2("./23/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file2") = 0 umount2("./23/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file3") = 0 umount2("./23/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file1") = -1 EBUSY (Device or resource busy) [ 27.368136][ T387] EXT4-fs (loop0): Ignoring removed orlov option [ 27.374402][ T387] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.389319][ T387] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./23/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./23/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./23") = 0 mkdir("./24", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 392 executing program ./strace-static-x86_64: Process 392 attached [pid 392] set_robust_list(0x5555563a2660, 24) = 0 [pid 392] chdir("./24") = 0 [pid 392] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 392] setpgid(0, 0) = 0 [pid 392] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 392] write(3, "1000", 4) = 4 [pid 392] close(3) = 0 [pid 392] symlink("/dev/binderfs", "./binderfs") = 0 [pid 392] write(1, "executing program\n", 18) = 18 [pid 392] memfd_create("syzkaller", 0) = 3 [pid 392] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 392] 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"..., 524288) = 524288 [pid 392] munmap(0x7f928791a000, 138412032) = 0 [pid 392] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 392] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 392] close(3) = 0 [pid 392] close(4) = 0 [pid 392] mkdir("./file1", 0777) = 0 [pid 392] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 392] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 392] chdir("./file1") = 0 [pid 392] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 392] ioctl(4, LOOP_CLR_FD) = 0 [pid 392] close(4) = 0 [pid 392] chdir("./file0") = 0 [pid 392] creat("./bus", 000) = 4 [pid 392] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 392] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 392] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 392] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 392] exit_group(0) = ? [pid 392] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=392, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./24", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./24/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./24/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./24/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./24/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./24/file1/lost+found") = 0 umount2("./24/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./24/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file0/file0") = 0 umount2("./24/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file0/file1") = 0 umount2("./24/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./24/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./24/file1/file0") = 0 umount2("./24/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file1") = 0 umount2("./24/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file2") = 0 umount2("./24/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file3") = 0 umount2("./24/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file1") = -1 EBUSY (Device or resource busy) [ 27.512562][ T392] EXT4-fs (loop0): Ignoring removed orlov option [ 27.519182][ T392] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.529471][ T392] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./24/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./24/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 396 ./strace-static-x86_64: Process 396 attached [pid 396] set_robust_list(0x5555563a2660, 24) = 0 [pid 396] chdir("./25") = 0 [pid 396] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 396] setpgid(0, 0) = 0 [pid 396] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 396] write(3, "1000", 4) = 4 [pid 396] close(3) = 0 [pid 396] symlink("/dev/binderfs", "./binderfs"executing program ) = 0 [pid 396] write(1, "executing program\n", 18) = 18 [pid 396] memfd_create("syzkaller", 0) = 3 [pid 396] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 396] 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"..., 524288) = 524288 [pid 396] munmap(0x7f928791a000, 138412032) = 0 [pid 396] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 396] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 396] close(3) = 0 [pid 396] close(4) = 0 [pid 396] mkdir("./file1", 0777) = 0 [pid 396] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 396] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 396] chdir("./file1") = 0 [pid 396] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 396] ioctl(4, LOOP_CLR_FD) = 0 [pid 396] close(4) = 0 [pid 396] chdir("./file0") = 0 [pid 396] creat("./bus", 000) = 4 [pid 396] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 396] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 396] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 396] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 396] exit_group(0) = ? [pid 396] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=396, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./25", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./25/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./25/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./25/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./25/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./25/file1/lost+found") = 0 umount2("./25/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./25/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file0/file0") = 0 umount2("./25/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file0/file1") = 0 umount2("./25/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./25/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./25/file1/file0") = 0 umount2("./25/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file1") = 0 umount2("./25/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file2") = 0 umount2("./25/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file3") = 0 umount2("./25/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file1") = -1 EBUSY (Device or resource busy) [ 27.672113][ T396] EXT4-fs (loop0): Ignoring removed orlov option [ 27.678837][ T396] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.689511][ T396] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./25/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./25/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./25") = 0 mkdir("./26", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 400 ./strace-static-x86_64: Process 400 attached [pid 400] set_robust_list(0x5555563a2660, 24) = 0 executing program [pid 400] chdir("./26") = 0 [pid 400] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 400] setpgid(0, 0) = 0 [pid 400] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 400] write(3, "1000", 4) = 4 [pid 400] close(3) = 0 [pid 400] symlink("/dev/binderfs", "./binderfs") = 0 [pid 400] write(1, "executing program\n", 18) = 18 [pid 400] memfd_create("syzkaller", 0) = 3 [pid 400] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 400] 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"..., 524288) = 524288 [pid 400] munmap(0x7f928791a000, 138412032) = 0 [pid 400] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 400] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 400] close(3) = 0 [pid 400] close(4) = 0 [pid 400] mkdir("./file1", 0777) = 0 [pid 400] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 400] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 400] chdir("./file1") = 0 [pid 400] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 400] ioctl(4, LOOP_CLR_FD) = 0 [pid 400] close(4) = 0 [pid 400] chdir("./file0") = 0 [pid 400] creat("./bus", 000) = 4 [pid 400] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 400] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 400] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 400] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 400] exit_group(0) = ? [pid 400] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=400, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./26", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./26/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./26/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./26/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./26/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./26/file1/lost+found") = 0 umount2("./26/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./26/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file0/file0") = 0 umount2("./26/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file0/file1") = 0 umount2("./26/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./26/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./26/file1/file0") = 0 umount2("./26/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file1") = 0 umount2("./26/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file2") = 0 umount2("./26/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file3") = 0 umount2("./26/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file1") = -1 EBUSY (Device or resource busy) [ 27.849669][ T400] EXT4-fs (loop0): Ignoring removed orlov option [ 27.856220][ T400] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.869175][ T400] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./26/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./26/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./26") = 0 mkdir("./27", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 404 ./strace-static-x86_64: Process 404 attached [pid 404] set_robust_list(0x5555563a2660, 24) = 0 [pid 404] chdir("./27") = 0 [pid 404] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 404] setpgid(0, 0) = 0 [pid 404] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 404] write(3, "1000", 4) = 4 [pid 404] close(3) = 0 [pid 404] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 404] write(1, "executing program\n", 18) = 18 [pid 404] memfd_create("syzkaller", 0) = 3 [pid 404] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 404] 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"..., 524288) = 524288 [pid 404] munmap(0x7f928791a000, 138412032) = 0 [pid 404] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 404] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 404] close(3) = 0 [pid 404] close(4) = 0 [pid 404] mkdir("./file1", 0777) = 0 [pid 404] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 404] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 404] chdir("./file1") = 0 [pid 404] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 404] ioctl(4, LOOP_CLR_FD) = 0 [pid 404] close(4) = 0 [pid 404] chdir("./file0") = 0 [pid 404] creat("./bus", 000) = 4 [pid 404] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 404] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 404] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 404] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 404] exit_group(0) = ? [pid 404] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=404, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./27", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./27/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./27/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./27/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./27/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./27/file1/lost+found") = 0 umount2("./27/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./27/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file0/file0") = 0 umount2("./27/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file0/file1") = 0 umount2("./27/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./27/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./27/file1/file0") = 0 umount2("./27/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file1") = 0 umount2("./27/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file2") = 0 umount2("./27/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file3") = 0 umount2("./27/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file1") = -1 EBUSY (Device or resource busy) [ 27.981346][ T404] EXT4-fs (loop0): Ignoring removed orlov option [ 27.987754][ T404] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.999222][ T404] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./27/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./27/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./27") = 0 mkdir("./28", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 408 ./strace-static-x86_64: Process 408 attached [pid 408] set_robust_list(0x5555563a2660, 24) = 0 [pid 408] chdir("./28") = 0 [pid 408] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 408] setpgid(0, 0) = 0 [pid 408] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 408] write(3, "1000", 4) = 4 [pid 408] close(3) = 0 [pid 408] symlink("/dev/binderfs", "./binderfs") = 0 [pid 408] write(1, "executing program\n", 18) = 18 [pid 408] memfd_create("syzkaller", 0) = 3 [pid 408] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 executing program [pid 408] 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"..., 524288) = 524288 [pid 408] munmap(0x7f928791a000, 138412032) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 408] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 408] close(3) = 0 [pid 408] close(4) = 0 [pid 408] mkdir("./file1", 0777) = 0 [pid 408] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 408] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 408] chdir("./file1") = 0 [pid 408] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 408] ioctl(4, LOOP_CLR_FD) = 0 [pid 408] close(4) = 0 [pid 408] chdir("./file0") = 0 [pid 408] creat("./bus", 000) = 4 [pid 408] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 408] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 408] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 408] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 408] exit_group(0) = ? [pid 408] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=408, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./28", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./28/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./28/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./28/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./28/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./28/file1/lost+found") = 0 umount2("./28/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./28/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file0/file0") = 0 umount2("./28/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file0/file1") = 0 umount2("./28/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./28/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./28/file1/file0") = 0 umount2("./28/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file1") = 0 umount2("./28/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file2") = 0 umount2("./28/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file3") = 0 umount2("./28/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file1") = -1 EBUSY (Device or resource busy) [ 28.154018][ T408] EXT4-fs (loop0): Ignoring removed orlov option [ 28.160489][ T408] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.180275][ T408] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./28/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./28/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./28") = 0 mkdir("./29", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 412 ./strace-static-x86_64: Process 412 attached [pid 412] set_robust_list(0x5555563a2660, 24) = 0 [pid 412] chdir("./29") = 0 [pid 412] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 412] setpgid(0, 0) = 0 [pid 412] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 412] write(3, "1000", 4) = 4 [pid 412] close(3) = 0 [pid 412] symlink("/dev/binderfs", "./binderfs") = 0 [pid 412] write(1, "executing program\n", 18) = 18 [pid 412] memfd_create("syzkaller", 0) = 3 [pid 412] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 412] 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"..., 524288) = 524288 [pid 412] munmap(0x7f928791a000, 138412032) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 412] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 412] close(3) = 0 [pid 412] close(4) = 0 [pid 412] mkdir("./file1", 0777) = 0 [pid 412] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 412] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 412] chdir("./file1") = 0 [pid 412] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 412] ioctl(4, LOOP_CLR_FD) = 0 [pid 412] close(4) = 0 [pid 412] chdir("./file0") = 0 [pid 412] creat("./bus", 000) = 4 [pid 412] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 412] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 412] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 412] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 412] exit_group(0) = ? [pid 412] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=412, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./29", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./29/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./29/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./29/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./29/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./29/file1/lost+found") = 0 umount2("./29/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./29/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file0/file0") = 0 umount2("./29/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file0/file1") = 0 umount2("./29/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./29/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./29/file1/file0") = 0 umount2("./29/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file1") = 0 umount2("./29/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file2") = 0 umount2("./29/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file3") = 0 umount2("./29/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file1") = -1 EBUSY (Device or resource busy) [ 28.291751][ T412] EXT4-fs (loop0): Ignoring removed orlov option [ 28.298275][ T412] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.308935][ T412] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./29/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./29/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 417 ./strace-static-x86_64: Process 417 attached [pid 417] set_robust_list(0x5555563a2660, 24) = 0 [pid 417] chdir("./30") = 0 [pid 417] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 417] setpgid(0, 0) = 0 [pid 417] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 417] write(3, "1000", 4) = 4 [pid 417] close(3) = 0 [pid 417] symlink("/dev/binderfs", "./binderfs") = 0 [pid 417] write(1, "executing program\n", 18) = 18 [pid 417] memfd_create("syzkaller", 0) = 3 [pid 417] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 417] 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"..., 524288) = 524288 [pid 417] munmap(0x7f928791a000, 138412032) = 0 [pid 417] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 417] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 417] close(3) = 0 [pid 417] close(4) = 0 [pid 417] mkdir("./file1", 0777) = 0 [ 28.511740][ T417] EXT4-fs (loop0): Ignoring removed orlov option [ 28.518508][ T417] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 417] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 417] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 417] chdir("./file1") = 0 [pid 417] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 417] ioctl(4, LOOP_CLR_FD) = 0 [pid 417] close(4) = 0 [pid 417] chdir("./file0") = 0 [pid 417] creat("./bus", 000) = 4 [pid 417] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 417] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 417] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 417] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 417] exit_group(0) = ? [pid 417] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=417, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./30", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./30/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./30/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./30/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./30/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./30/file1/lost+found") = 0 umount2("./30/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./30/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file0/file0") = 0 umount2("./30/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file0/file1") = 0 umount2("./30/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./30/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./30/file1/file0") = 0 umount2("./30/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file1") = 0 umount2("./30/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file2") = 0 umount2("./30/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file3") = 0 umount2("./30/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file1") = -1 EBUSY (Device or resource busy) [ 28.539496][ T417] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./30/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./30/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 421 ./strace-static-x86_64: Process 421 attached [pid 421] set_robust_list(0x5555563a2660, 24) = 0 [pid 421] chdir("./31") = 0 [pid 421] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 421] setpgid(0, 0) = 0 [pid 421] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 421] write(3, "1000", 4) = 4 [pid 421] close(3) = 0 [pid 421] symlink("/dev/binderfs", "./binderfs") = 0 [pid 421] write(1, "executing program\n", 18) = 18 [pid 421] memfd_create("syzkaller", 0) = 3 [pid 421] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 421] 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"..., 524288) = 524288 [pid 421] munmap(0x7f928791a000, 138412032) = 0 [pid 421] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 421] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 421] close(3) = 0 [pid 421] close(4) = 0 [pid 421] mkdir("./file1", 0777) = 0 [pid 421] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 421] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 421] chdir("./file1") = 0 [pid 421] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 421] ioctl(4, LOOP_CLR_FD) = 0 [pid 421] close(4) = 0 [pid 421] chdir("./file0") = 0 [pid 421] creat("./bus", 000) = 4 [pid 421] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 421] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 421] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 421] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 421] exit_group(0) = ? [pid 421] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=421, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./31", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./31/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./31/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./31/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./31/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./31/file1/lost+found") = 0 umount2("./31/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./31/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file0/file0") = 0 umount2("./31/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file0/file1") = 0 umount2("./31/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./31/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./31/file1/file0") = 0 umount2("./31/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file1") = 0 [ 28.738361][ T421] EXT4-fs (loop0): Ignoring removed orlov option [ 28.744984][ T421] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.759007][ T421] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./31/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file2") = 0 umount2("./31/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file3") = 0 umount2("./31/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file1") = -1 EBUSY (Device or resource busy) umount2("./31/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./31/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 425 ./strace-static-x86_64: Process 425 attached [pid 425] set_robust_list(0x5555563a2660, 24) = 0 [pid 425] chdir("./32") = 0 [pid 425] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 425] setpgid(0, 0) = 0 [pid 425] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 425] write(3, "1000", 4) = 4 [pid 425] close(3) = 0 [pid 425] symlink("/dev/binderfs", "./binderfs") = 0 [pid 425] write(1, "executing program\n", 18) = 18 [pid 425] memfd_create("syzkaller", 0) = 3 [pid 425] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 425] 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"..., 524288) = 524288 [pid 425] munmap(0x7f928791a000, 138412032) = 0 [pid 425] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 425] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 425] close(3) = 0 [pid 425] close(4) = 0 [pid 425] mkdir("./file1", 0777) = 0 [pid 425] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 425] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 425] chdir("./file1") = 0 [pid 425] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 425] ioctl(4, LOOP_CLR_FD) = 0 [pid 425] close(4) = 0 [pid 425] chdir("./file0") = 0 [pid 425] creat("./bus", 000) = 4 [pid 425] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 425] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 425] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 425] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 425] exit_group(0) = ? [pid 425] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=425, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./32", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./32/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./32/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./32/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./32/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./32/file1/lost+found") = 0 umount2("./32/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./32/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file0/file0") = 0 umount2("./32/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file0/file1") = 0 umount2("./32/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./32/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./32/file1/file0") = 0 umount2("./32/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file1") = 0 [ 28.881967][ T425] EXT4-fs (loop0): Ignoring removed orlov option [ 28.888957][ T425] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.909744][ T425] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./32/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file2") = 0 umount2("./32/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file3") = 0 umount2("./32/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file1") = -1 EBUSY (Device or resource busy) umount2("./32/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./32/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 429 ./strace-static-x86_64: Process 429 attached [pid 429] set_robust_list(0x5555563a2660, 24) = 0 executing program [pid 429] chdir("./33") = 0 [pid 429] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 429] setpgid(0, 0) = 0 [pid 429] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 429] write(3, "1000", 4) = 4 [pid 429] close(3) = 0 [pid 429] symlink("/dev/binderfs", "./binderfs") = 0 [pid 429] write(1, "executing program\n", 18) = 18 [pid 429] memfd_create("syzkaller", 0) = 3 [pid 429] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 429] 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"..., 524288) = 524288 [pid 429] munmap(0x7f928791a000, 138412032) = 0 [pid 429] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 429] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 429] close(3) = 0 [pid 429] close(4) = 0 [pid 429] mkdir("./file1", 0777) = 0 [ 29.060047][ T429] EXT4-fs (loop0): Ignoring removed orlov option [ 29.066844][ T429] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [pid 429] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 429] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 429] chdir("./file1") = 0 [pid 429] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 429] ioctl(4, LOOP_CLR_FD) = 0 [pid 429] close(4) = 0 [pid 429] chdir("./file0") = 0 [pid 429] creat("./bus", 000) = 4 [pid 429] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 429] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 429] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 429] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 429] exit_group(0) = ? [pid 429] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=429, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./33", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./33/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./33/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./33/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./33/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./33/file1/lost+found") = 0 umount2("./33/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./33/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file0/file0") = 0 umount2("./33/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file0/file1") = 0 umount2("./33/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./33/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./33/file1/file0") = 0 umount2("./33/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file1") = 0 umount2("./33/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file2") = 0 umount2("./33/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file3") = 0 umount2("./33/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./33/file1") = -1 EBUSY (Device or resource busy) [ 29.088755][ T429] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./33/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./33/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./33") = 0 mkdir("./34", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 433 executing program ./strace-static-x86_64: Process 433 attached [pid 433] set_robust_list(0x5555563a2660, 24) = 0 [pid 433] chdir("./34") = 0 [pid 433] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 433] setpgid(0, 0) = 0 [pid 433] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 433] write(3, "1000", 4) = 4 [pid 433] close(3) = 0 [pid 433] symlink("/dev/binderfs", "./binderfs") = 0 [pid 433] write(1, "executing program\n", 18) = 18 [pid 433] memfd_create("syzkaller", 0) = 3 [pid 433] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 433] 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"..., 524288) = 524288 [pid 433] munmap(0x7f928791a000, 138412032) = 0 [pid 433] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 433] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 433] close(3) = 0 [pid 433] close(4) = 0 [pid 433] mkdir("./file1", 0777) = 0 [pid 433] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 433] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 433] chdir("./file1") = 0 [pid 433] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 433] ioctl(4, LOOP_CLR_FD) = 0 [pid 433] close(4) = 0 [pid 433] chdir("./file0") = 0 [pid 433] creat("./bus", 000) = 4 [pid 433] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 433] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 433] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 433] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 433] exit_group(0) = ? [pid 433] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=433, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./34", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./34/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./34/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./34/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./34/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./34/file1/lost+found") = 0 umount2("./34/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./34/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file0/file0") = 0 umount2("./34/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file0/file1") = 0 umount2("./34/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./34/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./34/file1/file0") = 0 umount2("./34/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file1") = 0 umount2("./34/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file2") = 0 umount2("./34/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file3") = 0 umount2("./34/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file1") = -1 EBUSY (Device or resource busy) [ 29.230436][ T433] EXT4-fs (loop0): Ignoring removed orlov option [ 29.236938][ T433] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.249288][ T433] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./34/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./34/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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_FDexecuting program ) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 438 ./strace-static-x86_64: Process 438 attached [pid 438] set_robust_list(0x5555563a2660, 24) = 0 [pid 438] chdir("./35") = 0 [pid 438] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 438] setpgid(0, 0) = 0 [pid 438] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 438] write(3, "1000", 4) = 4 [pid 438] close(3) = 0 [pid 438] symlink("/dev/binderfs", "./binderfs") = 0 [pid 438] write(1, "executing program\n", 18) = 18 [pid 438] memfd_create("syzkaller", 0) = 3 [pid 438] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 438] 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"..., 524288) = 524288 [pid 438] munmap(0x7f928791a000, 138412032) = 0 [pid 438] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 438] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 438] close(3) = 0 [pid 438] close(4) = 0 [pid 438] mkdir("./file1", 0777) = 0 [pid 438] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 438] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 438] chdir("./file1") = 0 [pid 438] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 438] ioctl(4, LOOP_CLR_FD) = 0 [pid 438] close(4) = 0 [pid 438] chdir("./file0") = 0 [pid 438] creat("./bus", 000) = 4 [pid 438] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 438] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 438] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 438] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 438] exit_group(0) = ? [pid 438] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=438, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./35", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./35/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./35/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./35/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./35/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./35/file1/lost+found") = 0 umount2("./35/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./35/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file0/file0") = 0 umount2("./35/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file0/file1") = 0 umount2("./35/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./35/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./35/file1/file0") = 0 umount2("./35/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file1") = 0 umount2("./35/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 29.390754][ T438] EXT4-fs (loop0): Ignoring removed orlov option [ 29.397227][ T438] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.408875][ T438] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue unlink("./35/file1/file2") = 0 umount2("./35/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file3") = 0 umount2("./35/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./35/file1") = -1 EBUSY (Device or resource busy) umount2("./35/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./35/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./35") = 0 mkdir("./36", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 442 ./strace-static-x86_64: Process 442 attached [pid 442] set_robust_list(0x5555563a2660, 24) = 0 [pid 442] chdir("./36") = 0 [pid 442] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 442] setpgid(0, 0) = 0 [pid 442] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 442] write(3, "1000", 4) = 4 [pid 442] close(3) = 0 [pid 442] symlink("/dev/binderfs", "./binderfs") = 0 [pid 442] write(1, "executing program\n", 18executing program ) = 18 [pid 442] memfd_create("syzkaller", 0) = 3 [pid 442] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 442] 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"..., 524288) = 524288 [pid 442] munmap(0x7f928791a000, 138412032) = 0 [pid 442] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 442] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 442] close(3) = 0 [pid 442] close(4) = 0 [pid 442] mkdir("./file1", 0777) = 0 [pid 442] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 442] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 442] chdir("./file1") = 0 [pid 442] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 442] ioctl(4, LOOP_CLR_FD) = 0 [pid 442] close(4) = 0 [pid 442] chdir("./file0") = 0 [pid 442] creat("./bus", 000) = 4 [pid 442] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 442] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 442] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 442] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 442] exit_group(0) = ? [pid 442] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=442, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- umount2("./36", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./36/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./36/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./36/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./36/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./36/file1/lost+found") = 0 umount2("./36/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./36/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file0/file0") = 0 umount2("./36/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file0/file1") = 0 umount2("./36/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./36/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./36/file1/file0") = 0 umount2("./36/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file1") = 0 umount2("./36/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file2") = 0 umount2("./36/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file3") = 0 umount2("./36/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file1") = -1 EBUSY (Device or resource busy) [ 29.628338][ T442] EXT4-fs (loop0): Ignoring removed orlov option [ 29.634616][ T442] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.648872][ T442] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./36/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./36/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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|SIGCHLDexecuting program , child_tidptr=0x5555563a2650) = 446 ./strace-static-x86_64: Process 446 attached [pid 446] set_robust_list(0x5555563a2660, 24) = 0 [pid 446] chdir("./37") = 0 [pid 446] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 446] setpgid(0, 0) = 0 [pid 446] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 446] write(3, "1000", 4) = 4 [pid 446] close(3) = 0 [pid 446] symlink("/dev/binderfs", "./binderfs") = 0 [pid 446] write(1, "executing program\n", 18) = 18 [pid 446] memfd_create("syzkaller", 0) = 3 [pid 446] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 446] 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"..., 524288) = 524288 [pid 446] munmap(0x7f928791a000, 138412032) = 0 [pid 446] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 446] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 446] close(3) = 0 [pid 446] close(4) = 0 [pid 446] mkdir("./file1", 0777) = 0 [pid 446] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 446] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 446] chdir("./file1") = 0 [pid 446] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 446] ioctl(4, LOOP_CLR_FD) = 0 [pid 446] close(4) = 0 [pid 446] chdir("./file0") = 0 [pid 446] creat("./bus", 000) = 4 [pid 446] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 446] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 446] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 446] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 446] exit_group(0) = ? [pid 446] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=446, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./37", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./37/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./37/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./37/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./37/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./37/file1/lost+found") = 0 umount2("./37/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./37/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file0/file0") = 0 umount2("./37/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file0/file1") = 0 umount2("./37/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./37/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./37/file1/file0") = 0 umount2("./37/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file1") = 0 umount2("./37/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file2") = 0 umount2("./37/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file3") = 0 umount2("./37/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file1") = -1 EBUSY (Device or resource busy) [ 29.828947][ T446] EXT4-fs (loop0): Ignoring removed orlov option [ 29.835277][ T446] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.849014][ T446] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./37/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./37/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 450 ./strace-static-x86_64: Process 450 attached [pid 450] set_robust_list(0x5555563a2660, 24) = 0 [pid 450] chdir("./38") = 0 [pid 450] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 450] setpgid(0, 0) = 0 [pid 450] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 450] write(3, "1000", 4) = 4 [pid 450] close(3) = 0 [pid 450] symlink("/dev/binderfs", "./binderfs") = 0 [pid 450] write(1, "executing program\n", 18) = 18 [pid 450] memfd_create("syzkaller", 0) = 3 [pid 450] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 450] 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"..., 524288) = 524288 [pid 450] munmap(0x7f928791a000, 138412032) = 0 [pid 450] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 450] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 450] close(3) = 0 [pid 450] close(4) = 0 [pid 450] mkdir("./file1", 0777) = 0 [pid 450] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 450] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 450] chdir("./file1") = 0 [pid 450] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 450] ioctl(4, LOOP_CLR_FD) = 0 [pid 450] close(4) = 0 [pid 450] chdir("./file0") = 0 [pid 450] creat("./bus", 000) = 4 [pid 450] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 450] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 450] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 450] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 450] exit_group(0) = ? [pid 450] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=450, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./38", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./38/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./38/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./38/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./38/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./38/file1/lost+found") = 0 umount2("./38/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./38/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file0/file0") = 0 umount2("./38/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file0/file1") = 0 umount2("./38/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./38/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./38/file1/file0") = 0 umount2("./38/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file1") = 0 umount2("./38/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file2") = 0 umount2("./38/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file3") = 0 umount2("./38/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file1") = -1 EBUSY (Device or resource busy) [ 30.029894][ T450] EXT4-fs (loop0): Ignoring removed orlov option [ 30.036341][ T450] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.049134][ T450] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./38/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./38/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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=0x5555563a2650) = 454 ./strace-static-x86_64: Process 454 attached [pid 454] set_robust_list(0x5555563a2660, 24) = 0 [pid 454] chdir("./39") = 0 [pid 454] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 454] setpgid(0, 0) = 0 [pid 454] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 454] write(3, "1000", 4) = 4 [pid 454] close(3) = 0 [pid 454] symlink("/dev/binderfs", "./binderfs"executing program ) = 0 [pid 454] write(1, "executing program\n", 18) = 18 [pid 454] memfd_create("syzkaller", 0) = 3 [pid 454] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 454] 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"..., 524288) = 524288 [pid 454] munmap(0x7f928791a000, 138412032) = 0 [pid 454] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 454] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 454] close(3) = 0 [pid 454] close(4) = 0 [pid 454] mkdir("./file1", 0777) = 0 [pid 454] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 454] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 454] chdir("./file1") = 0 [pid 454] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 454] ioctl(4, LOOP_CLR_FD) = 0 [pid 454] close(4) = 0 [pid 454] chdir("./file0") = 0 [pid 454] creat("./bus", 000) = 4 [pid 454] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 454] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 454] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 454] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 454] exit_group(0) = ? [pid 454] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=454, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./39", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./39/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./39/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./39/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./39/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./39/file1/lost+found") = 0 umount2("./39/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./39/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file0/file0") = 0 umount2("./39/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file0/file1") = 0 umount2("./39/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./39/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./39/file1/file0") = 0 umount2("./39/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file1") = 0 umount2("./39/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file2") = 0 umount2("./39/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file3") = 0 umount2("./39/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file1") = -1 EBUSY (Device or resource busy) [ 30.199739][ T454] EXT4-fs (loop0): Ignoring removed orlov option [ 30.206120][ T454] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.219059][ T454] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./39/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./39/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 459 ./strace-static-x86_64: Process 459 attached [pid 459] set_robust_list(0x5555563a2660, 24) = 0 [pid 459] chdir("./40") = 0 [pid 459] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 459] setpgid(0, 0) = 0 [pid 459] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 459] write(3, "1000", 4) = 4 [pid 459] close(3) = 0 [pid 459] symlink("/dev/binderfs", "./binderfs") = 0 [pid 459] write(1, "executing program\n", 18executing program ) = 18 [pid 459] memfd_create("syzkaller", 0) = 3 [pid 459] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 459] 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"..., 524288) = 524288 [pid 459] munmap(0x7f928791a000, 138412032) = 0 [pid 459] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 459] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 459] close(3) = 0 [pid 459] close(4) = 0 [pid 459] mkdir("./file1", 0777) = 0 [pid 459] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 459] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 459] chdir("./file1") = 0 [pid 459] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 459] ioctl(4, LOOP_CLR_FD) = 0 [pid 459] close(4) = 0 [pid 459] chdir("./file0") = 0 [pid 459] creat("./bus", 000) = 4 [pid 459] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 459] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 459] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 459] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 459] exit_group(0) = ? [pid 459] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=459, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./40", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./40/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./40/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./40/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./40/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./40/file1/lost+found") = 0 umount2("./40/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./40/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file0/file0") = 0 umount2("./40/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file0/file1") = 0 umount2("./40/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./40/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./40/file1/file0") = 0 umount2("./40/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file1") = 0 umount2("./40/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file2") = 0 umount2("./40/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file3") = 0 umount2("./40/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file1") = -1 EBUSY (Device or resource busy) [ 30.400117][ T459] EXT4-fs (loop0): Ignoring removed orlov option [ 30.406285][ T459] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.419097][ T459] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./40/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./40/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./40") = 0 mkdir("./41", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 463 ./strace-static-x86_64: Process 463 attached [pid 463] set_robust_list(0x5555563a2660, 24) = 0 [pid 463] chdir("./41") = 0 [pid 463] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 463] setpgid(0, 0) = 0 [pid 463] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 463] write(3, "1000", 4) = 4 [pid 463] close(3) = 0 [pid 463] symlink("/dev/binderfs", "./binderfs") = 0 [pid 463] write(1, "executing program\n", 18) = 18 [pid 463] memfd_create("syzkaller", 0) = 3 [pid 463] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 463] 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"..., 524288) = 524288 [pid 463] munmap(0x7f928791a000, 138412032) = 0 [pid 463] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 463] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 463] close(3) = 0 [pid 463] close(4) = 0 [pid 463] mkdir("./file1", 0777) = 0 [pid 463] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 463] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 463] chdir("./file1") = 0 [pid 463] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 463] ioctl(4, LOOP_CLR_FD) = 0 [pid 463] close(4) = 0 [pid 463] chdir("./file0") = 0 [pid 463] creat("./bus", 000) = 4 [pid 463] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 463] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 463] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 463] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 463] exit_group(0) = ? [pid 463] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=463, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./41", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./41/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./41/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./41/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./41/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./41/file1/lost+found") = 0 umount2("./41/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./41/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file0/file0") = 0 umount2("./41/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file0/file1") = 0 umount2("./41/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./41/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./41/file1/file0") = 0 umount2("./41/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file1") = 0 umount2("./41/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file2") = 0 umount2("./41/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file3") = 0 umount2("./41/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file1") = -1 EBUSY (Device or resource busy) [ 30.631466][ T463] EXT4-fs (loop0): Ignoring removed orlov option [ 30.638106][ T463] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.648692][ T463] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./41/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./41/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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|SIGCHLDexecuting program , child_tidptr=0x5555563a2650) = 467 ./strace-static-x86_64: Process 467 attached [pid 467] set_robust_list(0x5555563a2660, 24) = 0 [pid 467] chdir("./42") = 0 [pid 467] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 467] setpgid(0, 0) = 0 [pid 467] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 467] write(3, "1000", 4) = 4 [pid 467] close(3) = 0 [pid 467] symlink("/dev/binderfs", "./binderfs") = 0 [pid 467] write(1, "executing program\n", 18) = 18 [pid 467] memfd_create("syzkaller", 0) = 3 [pid 467] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 467] 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"..., 524288) = 524288 [pid 467] munmap(0x7f928791a000, 138412032) = 0 [pid 467] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 467] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 467] close(3) = 0 [pid 467] close(4) = 0 [pid 467] mkdir("./file1", 0777) = 0 [pid 467] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 467] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 467] chdir("./file1") = 0 [pid 467] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 467] ioctl(4, LOOP_CLR_FD) = 0 [pid 467] close(4) = 0 [pid 467] chdir("./file0") = 0 [pid 467] creat("./bus", 000) = 4 [pid 467] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 467] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 467] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 467] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 467] exit_group(0) = ? [pid 467] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=467, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./42", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./42/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./42/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./42/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./42/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./42/file1/lost+found") = 0 umount2("./42/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./42/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file0/file0") = 0 umount2("./42/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file0/file1") = 0 umount2("./42/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./42/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./42/file1/file0") = 0 umount2("./42/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file1") = 0 umount2("./42/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file2") = 0 umount2("./42/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file3") = 0 umount2("./42/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file1") = -1 EBUSY (Device or resource busy) [ 30.798182][ T467] EXT4-fs (loop0): Ignoring removed orlov option [ 30.804355][ T467] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.818974][ T467] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./42/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./42/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./42") = 0 mkdir("./43", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 471 ./strace-static-x86_64: Process 471 attached [pid 471] set_robust_list(0x5555563a2660, 24) = 0 [pid 471] chdir("./43") = 0 [pid 471] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 471] setpgid(0, 0) = 0 [pid 471] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 471] write(3, "1000", 4) = 4 [pid 471] close(3) = 0 [pid 471] symlink("/dev/binderfs", "./binderfs") = 0 [pid 471] write(1, "executing program\n", 18) = 18 [pid 471] memfd_create("syzkaller", 0) = 3 [pid 471] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 471] 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"..., 524288) = 524288 [pid 471] munmap(0x7f928791a000, 138412032) = 0 [pid 471] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 471] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 471] close(3) = 0 [pid 471] close(4) = 0 [pid 471] mkdir("./file1", 0777) = 0 [pid 471] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 471] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 471] chdir("./file1") = 0 [pid 471] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 471] ioctl(4, LOOP_CLR_FD) = 0 [pid 471] close(4) = 0 [pid 471] chdir("./file0") = 0 [pid 471] creat("./bus", 000) = 4 [pid 471] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 471] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 471] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 471] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 471] exit_group(0) = ? [pid 471] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=471, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./43", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./43/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./43/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./43/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./43/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./43/file1/lost+found") = 0 umount2("./43/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./43/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file0/file0") = 0 umount2("./43/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file0/file1") = 0 umount2("./43/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./43/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./43/file1/file0") = 0 umount2("./43/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file1") = 0 umount2("./43/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file2") = 0 umount2("./43/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file3") = 0 umount2("./43/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file1") = -1 EBUSY (Device or resource busy) [ 30.998357][ T471] EXT4-fs (loop0): Ignoring removed orlov option [ 31.004521][ T471] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.019069][ T471] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./43/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./43/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./43") = 0 mkdir("./44", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 475 ./strace-static-x86_64: Process 475 attached [pid 475] set_robust_list(0x5555563a2660, 24) = 0 [pid 475] chdir("./44") = 0 [pid 475] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 475] setpgid(0, 0) = 0 [pid 475] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 475] write(3, "1000", 4) = 4 [pid 475] close(3) = 0 [pid 475] symlink("/dev/binderfs", "./binderfs") = 0 [pid 475] write(1, "executing program\n", 18) = 18 [pid 475] memfd_create("syzkaller", 0) = 3 [pid 475] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 475] 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"..., 524288) = 524288 [pid 475] munmap(0x7f928791a000, 138412032) = 0 [pid 475] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 475] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 475] close(3) = 0 [pid 475] close(4) = 0 [pid 475] mkdir("./file1", 0777) = 0 [pid 475] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 475] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 475] chdir("./file1") = 0 [pid 475] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 475] ioctl(4, LOOP_CLR_FD) = 0 [pid 475] close(4) = 0 [pid 475] chdir("./file0") = 0 [pid 475] creat("./bus", 000) = 4 [pid 475] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 475] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 475] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 475] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 475] exit_group(0) = ? [pid 475] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=475, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./44", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./44/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./44/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./44/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./44/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./44/file1/lost+found") = 0 umount2("./44/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./44/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file0/file0") = 0 umount2("./44/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file0/file1") = 0 umount2("./44/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./44/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./44/file1/file0") = 0 umount2("./44/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file1") = 0 umount2("./44/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file2") = 0 umount2("./44/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file3") = 0 umount2("./44/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./44/file1") = -1 EBUSY (Device or resource busy) [ 31.238348][ T475] EXT4-fs (loop0): Ignoring removed orlov option [ 31.244512][ T475] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.258781][ T475] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./44/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./44/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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, child_tidptr=0x5555563a2650) = 480 ./strace-static-x86_64: Process 480 attached [pid 480] set_robust_list(0x5555563a2660, 24) = 0 [pid 480] chdir("./45") = 0 [pid 480] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 480] setpgid(0, 0) = 0 [pid 480] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 480] write(3, "1000", 4) = 4 [pid 480] close(3) = 0 [pid 480] symlink("/dev/binderfs", "./binderfs") = 0 [pid 480] write(1, "executing program\n", 18) = 18 [pid 480] memfd_create("syzkaller", 0) = 3 [pid 480] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 480] 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"..., 524288) = 524288 [pid 480] munmap(0x7f928791a000, 138412032) = 0 [pid 480] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 480] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 480] close(3) = 0 [pid 480] close(4) = 0 [pid 480] mkdir("./file1", 0777) = 0 [pid 480] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 480] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 480] chdir("./file1") = 0 [pid 480] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 480] ioctl(4, LOOP_CLR_FD) = 0 [pid 480] close(4) = 0 [pid 480] chdir("./file0") = 0 [pid 480] creat("./bus", 000) = 4 [pid 480] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 480] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 480] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 480] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 480] exit_group(0) = ? [pid 480] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=480, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./45", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./45/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./45/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./45/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./45/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./45/file1/lost+found") = 0 umount2("./45/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./45/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file0/file0") = 0 umount2("./45/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file0/file1") = 0 umount2("./45/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./45/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./45/file1/file0") = 0 umount2("./45/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file1") = 0 umount2("./45/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file2") = 0 umount2("./45/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file3") = 0 umount2("./45/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file1") = -1 EBUSY (Device or resource busy) [ 31.388805][ T480] EXT4-fs (loop0): Ignoring removed orlov option [ 31.395344][ T480] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.408810][ T480] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./45/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./45/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./45") = 0 mkdir("./46", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 484 ./strace-static-x86_64: Process 484 attached [pid 484] set_robust_list(0x5555563a2660, 24) = 0 [pid 484] chdir("./46") = 0 [pid 484] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 484] setpgid(0, 0) = 0 [pid 484] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 484] write(3, "1000", 4) = 4 [pid 484] close(3) = 0 [pid 484] symlink("/dev/binderfs", "./binderfs") = 0 [pid 484] write(1, "executing program\n", 18executing program ) = 18 [pid 484] memfd_create("syzkaller", 0) = 3 [pid 484] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 484] 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"..., 524288) = 524288 [pid 484] munmap(0x7f928791a000, 138412032) = 0 [pid 484] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 484] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 484] close(3) = 0 [pid 484] close(4) = 0 [pid 484] mkdir("./file1", 0777) = 0 [pid 484] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 484] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 484] chdir("./file1") = 0 [pid 484] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 484] ioctl(4, LOOP_CLR_FD) = 0 [pid 484] close(4) = 0 [pid 484] chdir("./file0") = 0 [pid 484] creat("./bus", 000) = 4 [pid 484] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 484] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 484] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 484] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 484] exit_group(0) = ? [pid 484] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=484, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./46", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./46/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./46/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./46/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./46/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./46/file1/lost+found") = 0 umount2("./46/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./46/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file0/file0") = 0 umount2("./46/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file0/file1") = 0 umount2("./46/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./46/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./46/file1/file0") = 0 umount2("./46/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file1") = 0 umount2("./46/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file2") = 0 umount2("./46/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file3") = 0 umount2("./46/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./46/file1") = -1 EBUSY (Device or resource busy) [ 31.590120][ T484] EXT4-fs (loop0): Ignoring removed orlov option [ 31.596292][ T484] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.608671][ T484] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./46/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./46/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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=0x5555563a2650) = 488 ./strace-static-x86_64: Process 488 attached [pid 488] set_robust_list(0x5555563a2660, 24) = 0 executing program [pid 488] chdir("./47") = 0 [pid 488] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 488] setpgid(0, 0) = 0 [pid 488] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 488] write(3, "1000", 4) = 4 [pid 488] close(3) = 0 [pid 488] symlink("/dev/binderfs", "./binderfs") = 0 [pid 488] write(1, "executing program\n", 18) = 18 [pid 488] memfd_create("syzkaller", 0) = 3 [pid 488] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 488] 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"..., 524288) = 524288 [pid 488] munmap(0x7f928791a000, 138412032) = 0 [pid 488] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 488] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 488] close(3) = 0 [pid 488] close(4) = 0 [pid 488] mkdir("./file1", 0777) = 0 [pid 488] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 488] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 488] chdir("./file1") = 0 [pid 488] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 488] ioctl(4, LOOP_CLR_FD) = 0 [pid 488] close(4) = 0 [pid 488] chdir("./file0") = 0 [pid 488] creat("./bus", 000) = 4 [pid 488] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 488] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 488] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 488] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 488] exit_group(0) = ? [pid 488] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=488, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- umount2("./47", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./47/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./47/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./47/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./47/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./47/file1/lost+found") = 0 umount2("./47/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./47/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file0/file0") = 0 umount2("./47/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file0/file1") = 0 umount2("./47/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./47/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./47/file1/file0") = 0 umount2("./47/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file1") = 0 umount2("./47/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file2") = 0 umount2("./47/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file3") = 0 umount2("./47/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./47/file1") = -1 EBUSY (Device or resource busy) [ 31.800401][ T488] EXT4-fs (loop0): Ignoring removed orlov option [ 31.806672][ T488] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.818731][ T488] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./47/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./47/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./47") = 0 mkdir("./48", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 492 ./strace-static-x86_64: Process 492 attached [pid 492] set_robust_list(0x5555563a2660, 24) = 0 [pid 492] chdir("./48") = 0 [pid 492] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 492] setpgid(0, 0) = 0 [pid 492] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 492] write(3, "1000", 4) = 4 [pid 492] close(3) = 0 [pid 492] symlink("/dev/binderfs", "./binderfs") = 0 [pid 492] write(1, "executing program\n", 18) = 18 [pid 492] memfd_create("syzkaller", 0) = 3 [pid 492] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 492] 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"..., 524288) = 524288 [pid 492] munmap(0x7f928791a000, 138412032) = 0 [pid 492] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 492] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 492] close(3) = 0 [pid 492] close(4) = 0 [pid 492] mkdir("./file1", 0777) = 0 [pid 492] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 492] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 492] chdir("./file1") = 0 [pid 492] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 492] ioctl(4, LOOP_CLR_FD) = 0 [pid 492] close(4) = 0 [pid 492] chdir("./file0") = 0 [pid 492] creat("./bus", 000) = 4 [pid 492] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 492] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 492] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 492] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 492] exit_group(0) = ? [pid 492] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=492, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./48", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./48/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./48/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./48/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./48/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./48/file1/lost+found") = 0 umount2("./48/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./48/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file0/file0") = 0 umount2("./48/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file0/file1") = 0 umount2("./48/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./48/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./48/file1/file0") = 0 umount2("./48/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file1") = 0 umount2("./48/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file2") = 0 umount2("./48/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file3") = 0 umount2("./48/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file1") = -1 EBUSY (Device or resource busy) [ 31.938835][ T492] EXT4-fs (loop0): Ignoring removed orlov option [ 31.945024][ T492] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.958808][ T492] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./48/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./48/file1") = 0 getdents64(3, 0x5555563a36f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./48") = 0 mkdir("./49", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 496 ./strace-static-x86_64: Process 496 attached [pid 496] set_robust_list(0x5555563a2660, 24) = 0 [pid 496] chdir("./49") = 0 [pid 496] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 496] setpgid(0, 0) = 0 [pid 496] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 496] write(3, "1000", 4) = 4 [pid 496] close(3) = 0 [pid 496] symlink("/dev/binderfs", "./binderfs") = 0 [pid 496] write(1, "executing program\n", 18) = 18 [pid 496] memfd_create("syzkaller", 0) = 3 [pid 496] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 496] 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"..., 524288) = 524288 [pid 496] munmap(0x7f928791a000, 138412032) = 0 [pid 496] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 496] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 496] close(3) = 0 [pid 496] close(4) = 0 [pid 496] mkdir("./file1", 0777) = 0 [pid 496] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 496] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 496] chdir("./file1") = 0 [pid 496] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 496] ioctl(4, LOOP_CLR_FD) = 0 [pid 496] close(4) = 0 [pid 496] chdir("./file0") = 0 [pid 496] creat("./bus", 000) = 4 [pid 496] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 496] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 496] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 496] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 496] exit_group(0) = ? [pid 496] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=496, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./49", MNT_FORCE|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, 0x5555563a36f0 /* 4 entries */, 32768) = 112 umount2("./49/binderfs", MNT_FORCE|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_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./49/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./49/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555563ab730 /* 8 entries */, 32768) = 240 umount2("./49/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 2 entries */, 32768) = 48 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./49/file1/lost+found") = 0 umount2("./49/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555563b3770 /* 5 entries */, 32768) = 136 umount2("./49/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file0/file0") = 0 umount2("./49/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file0/file1") = 0 umount2("./49/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./49/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file0/bus") = 0 getdents64(5, 0x5555563b3770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./49/file1/file0") = 0 umount2("./49/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file1") = 0 umount2("./49/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file2") = 0 umount2("./49/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file3") = 0 umount2("./49/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file.cold") = 0 getdents64(4, 0x5555563ab730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file1") = -1 EBUSY (Device or resource busy) [ 32.159198][ T496] EXT4-fs (loop0): Ignoring removed orlov option [ 32.165749][ T496] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 32.178784][ T496] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./49/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./49/file1") = 0 getdents64(3, 0x5555563a36f0 /* 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) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555563a2650) = 501 ./strace-static-x86_64: Process 501 attached [pid 501] set_robust_list(0x5555563a2660, 24) = 0 [pid 501] chdir("./50") = 0 [pid 501] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 501] setpgid(0, 0) = 0 [pid 501] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 501] write(3, "1000", 4) = 4 [pid 501] close(3) = 0 [pid 501] symlink("/dev/binderfs", "./binderfs") = 0 [pid 501] write(1, "executing program\n", 18) = 18 [pid 501] memfd_create("syzkaller", 0) = 3 [pid 501] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f928791a000 [pid 501] 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"..., 524288) = 524288 [pid 501] munmap(0x7f928791a000, 138412032) = 0 [pid 501] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 501] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 501] close(3) = 0 [pid 501] close(4) = 0 [pid 501] mkdir("./file1", 0777) = 0