./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3253664015

<...>
Warning: Permanently added '10.128.0.56' (ED25519) to the list of known hosts.
execve("./syz-executor3253664015", ["./syz-executor3253664015"], 0x7fff2504bcc0 /* 10 vars */) = 0
brk(NULL)                               = 0x555589314000
brk(0x555589314d00)                     = 0x555589314d00
arch_prctl(ARCH_SET_FS, 0x555589314380) = 0
set_tid_address(0x555589314650)         = 295
set_robust_list(0x555589314660, 24)     = 0
rseq(0x555589314ca0, 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-executor3253664015", 4096) = 28
getrandom("\x93\xdc\xb9\x9f\xe5\x16\x01\xed", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555589314d00
brk(0x555589335d00)                     = 0x555589335d00
brk(0x555589336000)                     = 0x555589336000
mprotect(0x7f0c62630000, 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.OaE1pP", 0700)       = 0
chmod("./syzkaller.OaE1pP", 0777)       = 0
chdir("./syzkaller.OaE1pP")             = 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=0x555589314650) = 296
./strace-static-x86_64: Process 296 attached
[pid   296] set_robust_list(0x555589314660, 24) = 0
[pid   296] chdir("./0")                = 0
[pid   296] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   296] setpgid(0, 0)               = 0
[pid   296] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   296] write(3, "1000", 4)         = 4
[pid   296] close(3)                    = 0
[pid   296] symlink("/dev/binderfs", "./binderfs") = 0
[pid   296] write(1, "executing program\n", 18executing program
) = 18
[pid   296] memfd_create("syzkaller", 0) = 3
[pid   296] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   296] 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   296] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   296] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[   23.578392][   T30] audit: type=1400 audit(1729792758.789:66): avc:  denied  { execmem } for  pid=295 comm="syz-executor325" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   23.599136][   T30] audit: type=1400 audit(1729792758.799:67): avc:  denied  { read write } for  pid=295 comm="syz-executor325" name="loop0" dev="devtmpfs" ino=112 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1
[pid   296] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   296] close(3)                    = 0
[pid   296] close(4)                    = 0
[pid   296] mkdir("./file1", 0777)      = 0
[   23.623803][   T30] audit: type=1400 audit(1729792758.799:68): avc:  denied  { open } for  pid=295 comm="syz-executor325" path="/dev/loop0" dev="devtmpfs" ino=112 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1
[   23.625203][  T296] loop0: detected capacity change from 0 to 1024
[   23.648606][   T30] audit: type=1400 audit(1729792758.799:69): avc:  denied  { ioctl } for  pid=295 comm="syz-executor325" path="/dev/loop0" dev="devtmpfs" ino=112 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1
[   23.680651][   T30] audit: type=1400 audit(1729792758.869:70): avc:  denied  { mounton } for  pid=296 comm="syz-executor325" path="/root/syzkaller.OaE1pP/0/file1" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[   23.705565][  T296] EXT4-fs (loop0): Ignoring removed orlov option
[   23.711847][  T296] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   296] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   296] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   296] chdir("./file1")            = 0
[pid   296] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   296] ioctl(4, LOOP_CLR_FD)       = 0
[pid   296] close(4)                    = 0
[pid   296] chdir("./file0")            = 0
[pid   296] creat("./bus", 000)         = 4
[pid   296] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   296] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   296] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   296] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   296] exit_group(0)               = ?
[pid   296] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=296, si_uid=0, si_status=0, si_utime=0, si_stime=7} ---
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, 0x5555893156f0 /* 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
[   23.726040][  T296] 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. Quota mode: none.
[   23.749536][   T30] audit: type=1400 audit(1729792758.959:71): avc:  denied  { mount } for  pid=296 comm="syz-executor325" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./0/file1")                      = -1 EBUSY (Device or resource busy)
[   23.771503][   T30] audit: type=1400 audit(1729792758.969:72): avc:  denied  { write } for  pid=296 comm="syz-executor325" name="file0" dev="loop0" ino=12 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1
[   23.794016][   T30] audit: type=1400 audit(1729792758.969:73): avc:  denied  { add_name } for  pid=296 comm="syz-executor325" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1
umount2("./0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./0/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./0")                            = 0
mkdir("./1", 0777)                      = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
[   23.815121][   T30] audit: type=1400 audit(1729792758.969:74): avc:  denied  { create } for  pid=296 comm="syz-executor325" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1
[   23.835244][   T30] audit: type=1400 audit(1729792758.969:75): avc:  denied  { write open } for  pid=296 comm="syz-executor325" path="/root/syzkaller.OaE1pP/0/file1/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1
ioctl(3, LOOP_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=0x555589314650) = 302
./strace-static-x86_64: Process 302 attached
[pid   302] set_robust_list(0x555589314660, 24) = 0
[pid   302] chdir("./1")                = 0
[pid   302] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   302] setpgid(0, 0)               = 0
[pid   302] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   302] write(3, "1000", 4)         = 4
[pid   302] close(3)                    = 0
[pid   302] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   302] write(1, "executing program\n", 18) = 18
[pid   302] memfd_create("syzkaller", 0) = 3
[pid   302] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   302] 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   302] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   302] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   302] close(3)                    = 0
[pid   302] close(4)                    = 0
[pid   302] mkdir("./file1", 0777)      = 0
[   23.921990][  T302] loop0: detected capacity change from 0 to 1024
[   24.004611][  T302] EXT4-fs (loop0): Ignoring removed orlov option
[   24.011021][  T302] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   302] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   302] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   302] chdir("./file1")            = 0
[pid   302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   302] ioctl(4, LOOP_CLR_FD)       = 0
[pid   302] close(4)                    = 0
[pid   302] chdir("./file0")            = 0
[pid   302] creat("./bus", 000)         = 4
[pid   302] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   302] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   302] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   302] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   302] exit_group(0)               = ?
[pid   302] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=302, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./1/file1")                      = -1 EBUSY (Device or resource busy)
[   24.035501][  T302] 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. Quota mode: none.
umount2("./1/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./1/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 305
./strace-static-x86_64: Process 305 attached
[pid   305] set_robust_list(0x555589314660, 24) = 0
[pid   305] chdir("./2")                = 0
[pid   305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   305] setpgid(0, 0)               = 0
[pid   305] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   305] write(3, "1000", 4)         = 4
[pid   305] close(3)                    = 0
[pid   305] symlink("/dev/binderfs", "./binderfs") = 0
[pid   305] write(1, "executing program\n", 18) = 18
[pid   305] memfd_create("syzkaller", 0) = 3
[pid   305] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   305] 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   305] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   305] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   305] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   305] close(3)                    = 0
[pid   305] close(4)                    = 0
[pid   305] mkdir("./file1", 0777)      = 0
[   24.165424][  T305] loop0: detected capacity change from 0 to 1024
[pid   305] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   305] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   305] chdir("./file1")            = 0
[pid   305] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   305] ioctl(4, LOOP_CLR_FD)       = 0
[pid   305] close(4)                    = 0
[pid   305] chdir("./file0")            = 0
[pid   305] creat("./bus", 000)         = 4
[pid   305] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   305] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   305] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   305] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   305] exit_group(0)               = ?
[pid   305] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=305, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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
unlink("./2/file1/file0/bus")           = 0
getdents64(5, 0x555589325770 /* 0 entries */, 32768) = 0
close(5)                                = 0
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./2/file1")                      = -1 EBUSY (Device or resource busy)
[   24.264552][  T305] EXT4-fs (loop0): Ignoring removed orlov option
[   24.271080][  T305] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   24.285530][  T305] 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. Quota mode: none.
umount2("./2/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./2/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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|SIGCHLDexecuting program
, child_tidptr=0x555589314650) = 308
./strace-static-x86_64: Process 308 attached
[pid   308] set_robust_list(0x555589314660, 24) = 0
[pid   308] chdir("./3")                = 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", 18) = 18
[pid   308] memfd_create("syzkaller", 0) = 3
[pid   308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   24.435750][  T308] loop0: detected capacity change from 0 to 1024
[   24.444235][  T308] EXT4-fs (loop0): Ignoring removed orlov option
[   24.450600][  T308] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[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=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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./3/file1")                      = -1 EBUSY (Device or resource busy)
[   24.465635][  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. Quota mode: none.
umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./3/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 311
./strace-static-x86_64: Process 311 attached
[pid   311] set_robust_list(0x555589314660, 24) = 0
[pid   311] chdir("./4")                = 0
[pid   311] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   311] setpgid(0, 0)               = 0
[pid   311] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   311] write(3, "1000", 4)         = 4
[pid   311] close(3)                    = 0
[pid   311] symlink("/dev/binderfs", "./binderfs") = 0
[pid   311] write(1, "executing program\n", 18) = 18
[pid   311] memfd_create("syzkaller", 0) = 3
[pid   311] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   311] 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   311] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   311] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   311] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   311] close(3)                    = 0
[pid   311] close(4)                    = 0
[pid   311] mkdir("./file1", 0777)      = 0
[   24.606079][  T311] loop0: detected capacity change from 0 to 1024
[   24.674598][  T311] EXT4-fs (loop0): Ignoring removed orlov option
[   24.681032][  T311] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   311] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   311] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   311] chdir("./file1")            = 0
[pid   311] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   311] ioctl(4, LOOP_CLR_FD)       = 0
[pid   311] close(4)                    = 0
[pid   311] chdir("./file0")            = 0
[pid   311] creat("./bus", 000)         = 4
[pid   311] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   311] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   311] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   311] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   311] exit_group(0)               = ?
[pid   311] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=311, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 0 entries */, 32768) = 0
[   24.705463][  T311] 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. Quota mode: none.
close(5)                                = 0
[   24.761689][  T295] ==================================================================
[   24.769733][  T295] BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xcd0/0xce0
[   24.777714][  T295] Read of size 4 at addr ffff888100bed000 by task syz-executor325/295
[   24.785655][  T295] 
[   24.787830][  T295] CPU: 0 PID: 295 Comm: syz-executor325 Not tainted 5.15.167-syzkaller-02003-g5e4635681cf1 #0
[   24.798156][  T295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
[   24.808097][  T295] Call Trace:
[   24.811184][  T295]  <TASK>
[   24.813955][  T295]  dump_stack_lvl+0x151/0x1c0
[   24.818563][  T295]  ? io_uring_drop_tctx_refs+0x190/0x190
[   24.824019][  T295]  ? panic+0x760/0x760
[   24.828021][  T295]  print_address_description+0x87/0x3b0
[   24.833491][  T295]  kasan_report+0x179/0x1c0
[   24.837851][  T295]  ? ext4_xattr_delete_inode+0xcd0/0xce0
[   24.843462][  T295]  ? ext4_xattr_delete_inode+0xcd0/0xce0
[   24.849307][  T295]  __asan_report_load4_noabort+0x14/0x20
[   24.855341][  T295]  ext4_xattr_delete_inode+0xcd0/0xce0
[   24.860852][  T295]  ? sb_end_intwrite+0x120/0x120
[   24.865979][  T295]  ? ext4_expand_extra_isize_ea+0x1bb0/0x1bb0
[   24.871894][  T295]  ? ext4_journal_check_start+0x16c/0x230
[   24.877522][  T295]  ? __kasan_check_read+0x11/0x20
[   24.882472][  T295]  ? ext4_inode_is_fast_symlink+0x295/0x3d0
[   24.888303][  T295]  ? ext4_evict_inode+0xb8d/0x14e0
[   24.893497][  T295]  ext4_evict_inode+0xea1/0x14e0
[   24.899241][  T295]  ? _raw_spin_unlock+0x4d/0x70
[   24.905453][  T295]  ? ext4_inode_is_fast_symlink+0x3d0/0x3d0
[   24.911526][  T295]  ? _raw_spin_unlock+0x4d/0x70
[   24.916393][  T295]  ? inode_io_list_del+0x18b/0x1a0
[   24.921428][  T295]  ? ext4_inode_is_fast_symlink+0x3d0/0x3d0
[   24.927534][  T295]  evict+0x529/0x930
[   24.931345][  T295]  ? _raw_spin_unlock+0x4d/0x70
[   24.936302][  T295]  ? mode_strip_sgid+0x220/0x220
[   24.941085][  T295]  ? __kasan_check_write+0x14/0x20
[   24.946039][  T295]  ? __kasan_check_write+0x14/0x20
[   24.950960][  T295]  ? ext4_drop_inode+0x90/0x1a0
[   24.955652][  T295]  iput+0x63b/0x7e0
[   24.959384][  T295]  vfs_rmdir+0x359/0x470
[   24.963463][  T295]  do_rmdir+0x3ab/0x630
[   24.967453][  T295]  ? d_delete_notify+0x160/0x160
[   24.972226][  T295]  ? strncpy_from_user+0x18e/0x2d0
[   24.977175][  T295]  ? getname_flags+0x1fd/0x520
[   24.981776][  T295]  __x64_sys_rmdir+0x49/0x50
[   24.986294][  T295]  x64_sys_call+0x274/0x9a0
[   24.991015][  T295]  do_syscall_64+0x3b/0xb0
[   24.995537][  T295]  ? clear_bhb_loop+0x35/0x90
[   25.000042][  T295]  entry_SYSCALL_64_after_hwframe+0x66/0xd0
[   25.005766][  T295] RIP: 0033:0x7f0c625bbdc7
[   25.010020][  T295] 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
[   25.029466][  T295] RSP: 002b:00007ffd290bd078 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
[   25.037754][  T295] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0c625bbdc7
[   25.045785][  T295] RDX: 0000000000008890 RSI: 0000000000000000 RDI: 00007ffd290be220
[   25.053674][  T295] RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000
[   25.061487][  T295] R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffd290be220
[   25.069295][  T295] R13: 0000555589325740 R14: 431bde82d7b634db R15: 00007ffd290c03a0
[   25.077111][  T295]  </TASK>
[   25.079970][  T295] 
[   25.082139][  T295] Allocated by task 1:
[   25.086048][  T295]  ____kasan_kmalloc+0xdb/0x110
[   25.090736][  T295]  __kasan_kmalloc+0x9/0x10
[   25.095076][  T295]  __kmalloc_track_caller+0x139/0x260
[   25.100457][  T295]  kvasprintf+0xd6/0x180
[   25.104533][  T295]  kvasprintf_const+0x5e/0x190
[   25.109135][  T295]  kobject_set_name_vargs+0x61/0x120
[   25.114255][  T295]  dev_set_name+0xd1/0x120
[   25.118511][  T295]  scsi_sysfs_device_initialize+0x1ab/0x7d0
[   25.124238][  T295]  scsi_alloc_sdev+0x7a0/0xa10
[   25.128853][  T295]  scsi_probe_and_add_lun+0x199/0x4320
[   25.134222][  T295]  __scsi_scan_target+0x1ed/0xe30
[   25.139079][  T295]  scsi_scan_host_selected+0x334/0x5f0
[   25.144374][  T295]  scsi_scan_host+0x3a8/0x670
[   25.148885][  T295]  virtscsi_probe+0x930/0xc30
[   25.153398][  T295]  virtio_dev_probe+0x891/0xae0
[   25.158259][  T295]  really_probe+0x28d/0x970
[   25.162603][  T295]  __driver_probe_device+0x1a0/0x310
[   25.167821][  T295]  driver_probe_device+0x54/0x3d0
[   25.172842][  T295]  __driver_attach+0x446/0x590
[   25.177445][  T295]  bus_for_each_dev+0x17b/0x1f0
[   25.182303][  T295]  driver_attach+0x42/0x50
[   25.186555][  T295]  bus_add_driver+0x33f/0x590
[   25.191066][  T295]  driver_register+0x2e2/0x3e0
[   25.195665][  T295]  register_virtio_driver+0x97/0xc0
[   25.200702][  T295]  init+0x66/0xe0
[   25.204176][  T295]  do_one_initcall+0x182/0x610
[   25.208771][  T295]  do_initcall_level+0x186/0x310
[   25.213668][  T295]  do_initcalls+0x4e/0x90
[   25.217806][  T295]  do_basic_setup+0x81/0x90
[   25.222139][  T295]  kernel_init_freeable+0x2c1/0x400
[   25.227174][  T295]  kernel_init+0x1d/0x290
[   25.231340][  T295]  ret_from_fork+0x1f/0x30
[   25.235703][  T295] 
[   25.237875][  T295] The buggy address belongs to the object at ffff888100bed000
[   25.237875][  T295]  which belongs to the cache kmalloc-16 of size 16
[   25.251691][  T295] The buggy address is located 0 bytes inside of
[   25.251691][  T295]  16-byte region [ffff888100bed000, ffff888100bed010)
[   25.264520][  T295] The buggy address belongs to the page:
[   25.270005][  T295] page:ffffea000402fb40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888100bed260 pfn:0x100bed
[   25.281377][  T295] flags: 0x4000000000000200(slab|zone=1)
[   25.287020][  T295] raw: 4000000000000200 ffffea0004283440 0000000a0000000a ffff888100042480
[   25.295428][  T295] raw: ffff888100bed260 0000000080800000 00000001ffffffff 0000000000000000
[   25.303836][  T295] page dumped because: kasan: bad access detected
[   25.310103][  T295] page_owner tracks the page as allocated
[   25.315912][  T295] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 2357671639, free_ts 0
[   25.330484][  T295]  post_alloc_hook+0x1a3/0x1b0
[   25.335092][  T295]  prep_new_page+0x1b/0x110
[   25.339508][  T295]  get_page_from_freelist+0x3550/0x35d0
[   25.344974][  T295]  __alloc_pages+0x27e/0x8f0
[   25.349667][  T295]  new_slab+0x9a/0x4e0
[   25.353831][  T295]  ___slab_alloc+0x39e/0x830
[   25.358256][  T295]  __slab_alloc+0x4a/0x90
[   25.362453][  T295]  __kmalloc+0x16d/0x270
[   25.366503][  T295]  blk_mq_realloc_hw_ctxs+0x765/0x1790
[   25.371882][  T295]  blk_mq_init_allocated_queue+0x449/0x16f0
[   25.377610][  T295]  blk_mq_init_queue+0x6b/0xd0
[   25.382213][  T295]  scsi_alloc_sdev+0x674/0xa10
[   25.387006][  T295]  scsi_probe_and_add_lun+0x199/0x4320
[   25.392290][  T295]  __scsi_scan_target+0x1ed/0xe30
[   25.397147][  T295]  scsi_scan_host_selected+0x334/0x5f0
[   25.402532][  T295]  scsi_scan_host+0x3a8/0x670
[   25.407217][  T295] page_owner free stack trace missing
[   25.412515][  T295] 
[   25.414779][  T295] Memory state around the buggy address:
[   25.420415][  T295]  ffff888100becf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   25.428490][  T295]  ffff888100becf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   25.436646][  T295] >ffff888100bed000: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc
[   25.444578][  T295]                    ^
[   25.448447][  T295]  ffff888100bed080: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc
[   25.456705][  T295]  ffff888100bed100: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc
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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./4/file1")                      = -1 EBUSY (Device or resource busy)
[   25.464717][  T295] ==================================================================
[   25.472703][  T295] Disabling lock debugging due to kernel taint
umount2("./4/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./4/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 315
./strace-static-x86_64: Process 315 attached
[pid   315] set_robust_list(0x555589314660, 24) = 0
[pid   315] chdir("./5")                = 0
[pid   315] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   315] setpgid(0, 0)               = 0
[pid   315] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   315] write(3, "1000", 4)         = 4
[pid   315] close(3)                    = 0
[pid   315] symlink("/dev/binderfs", "./binderfs") = 0
[pid   315] write(1, "executing program\n", 18executing program
) = 18
[pid   315] memfd_create("syzkaller", 0) = 3
[pid   315] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   315] 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   315] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   315] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   315] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   315] close(3)                    = 0
[pid   315] close(4)                    = 0
[pid   315] mkdir("./file1", 0777)      = 0
[   25.554548][  T315] loop0: detected capacity change from 0 to 1024
[   25.565198][  T315] EXT4-fs (loop0): Ignoring removed orlov option
[   25.571492][  T315] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   315] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   315] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   315] chdir("./file1")            = 0
[pid   315] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   315] ioctl(4, LOOP_CLR_FD)       = 0
[pid   315] close(4)                    = 0
[pid   315] chdir("./file0")            = 0
[pid   315] creat("./bus", 000)         = 4
[pid   315] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   315] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   315] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   315] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   315] exit_group(0)               = ?
[pid   315] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=315, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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
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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./5/file1")                      = -1 EBUSY (Device or resource busy)
[   25.585446][  T315] 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. Quota mode: none.
umount2("./5/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./5/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 318
./strace-static-x86_64: Process 318 attached
[pid   318] set_robust_list(0x555589314660, 24) = 0
[pid   318] chdir("./6")                = 0
[pid   318] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   318] setpgid(0, 0)               = 0
[pid   318] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   318] write(3, "1000", 4)         = 4
[pid   318] close(3)                    = 0
[pid   318] symlink("/dev/binderfs", "./binderfs") = 0
[pid   318] write(1, "executing program\n", 18executing program
) = 18
[pid   318] memfd_create("syzkaller", 0) = 3
[pid   318] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   318] 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   318] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   318] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   318] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   318] close(3)                    = 0
[pid   318] close(4)                    = 0
[pid   318] mkdir("./file1", 0777)      = 0
[   25.709766][  T318] loop0: detected capacity change from 0 to 1024
[pid   318] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   318] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   318] chdir("./file1")            = 0
[pid   318] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   318] ioctl(4, LOOP_CLR_FD)       = 0
[pid   318] close(4)                    = 0
[pid   318] chdir("./file0")            = 0
[pid   318] creat("./bus", 000)         = 4
[pid   318] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   318] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   318] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   318] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   318] exit_group(0)               = ?
[pid   318] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=318, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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
[   25.779772][  T318] EXT4-fs (loop0): Ignoring removed orlov option
[   25.786279][  T318] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   25.805489][  T318] 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. Quota mode: none.
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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./6/file1")                      = -1 EBUSY (Device or resource busy)
umount2("./6/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./6/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 321
./strace-static-x86_64: Process 321 attached
[pid   321] set_robust_list(0x555589314660, 24) = 0
[pid   321] chdir("./7")                = 0
[pid   321] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   321] setpgid(0, 0)               = 0
[pid   321] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   321] write(3, "1000", 4)         = 4
[pid   321] close(3)                    = 0
[pid   321] symlink("/dev/binderfs", "./binderfs") = 0
[pid   321] write(1, "executing program\n", 18) = 18
[pid   321] memfd_create("syzkaller", 0) = 3
[pid   321] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   321] 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   321] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   321] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   321] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   321] close(3)                    = 0
[pid   321] close(4)                    = 0
[pid   321] mkdir("./file1", 0777)      = 0
[   25.965806][  T321] loop0: detected capacity change from 0 to 1024
[pid   321] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   321] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   321] chdir("./file1")            = 0
[pid   321] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   321] ioctl(4, LOOP_CLR_FD)       = 0
[pid   321] close(4)                    = 0
[pid   321] chdir("./file0")            = 0
[pid   321] creat("./bus", 000)         = 4
[pid   321] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   321] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   321] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   321] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   321] exit_group(0)               = ?
[pid   321] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=321, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
[   26.054582][  T321] EXT4-fs (loop0): Ignoring removed orlov option
[   26.060841][  T321] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   26.075302][  T321] 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. Quota mode: none.
unlink("./7/file1/file3")               = 0
umount2("./7/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
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, 0x55558931d730 /* 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, 0x5555893156f0 /* 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=0x555589314650) = 324
./strace-static-x86_64: Process 324 attached
[pid   324] set_robust_list(0x555589314660, 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") = 0
executing program
[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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[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=2} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./8/file1")                      = -1 EBUSY (Device or resource busy)
[   26.249305][  T324] loop0: detected capacity change from 0 to 1024
[   26.259229][  T324] EXT4-fs (loop0): Ignoring removed orlov option
[   26.265758][  T324] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   26.275308][  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. Quota mode: none.
umount2("./8/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./8/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 327
./strace-static-x86_64: Process 327 attached
[pid   327] set_robust_list(0x555589314660, 24) = 0
[pid   327] chdir("./9")                = 0
[pid   327] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   327] setpgid(0, 0)               = 0
[pid   327] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   327] write(3, "1000", 4)         = 4
[pid   327] close(3)                    = 0
[pid   327] symlink("/dev/binderfs", "./binderfs") = 0
[pid   327] write(1, "executing program\n", 18executing program
) = 18
[pid   327] memfd_create("syzkaller", 0) = 3
[pid   327] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   327] 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   327] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   327] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   327] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   327] close(3)                    = 0
[pid   327] close(4)                    = 0
[pid   327] mkdir("./file1", 0777)      = 0
[   26.372495][  T327] loop0: detected capacity change from 0 to 1024
[pid   327] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   327] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   327] chdir("./file1")            = 0
[pid   327] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   327] ioctl(4, LOOP_CLR_FD)       = 0
[pid   327] close(4)                    = 0
[pid   327] chdir("./file0")            = 0
[pid   327] creat("./bus", 000)         = 4
[pid   327] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   327] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   327] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   327] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   327] exit_group(0)               = ?
[pid   327] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=327, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./9/file1")                      = -1 EBUSY (Device or resource busy)
[   26.464616][  T327] EXT4-fs (loop0): Ignoring removed orlov option
[   26.470889][  T327] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   26.485626][  T327] 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. Quota mode: none.
umount2("./9/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./9/file1")                      = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 332
./strace-static-x86_64: Process 332 attached
[pid   332] set_robust_list(0x555589314660, 24) = 0
[pid   332] chdir("./10")               = 0
[pid   332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   332] setpgid(0, 0)               = 0
[pid   332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   332] write(3, "1000", 4)         = 4
[pid   332] close(3)                    = 0
[pid   332] symlink("/dev/binderfs", "./binderfs") = 0
[pid   332] write(1, "executing program\n", 18) = 18
[pid   332] memfd_create("syzkaller", 0) = 3
[pid   332] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   332] 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   332] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   332] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   332] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   332] close(3)                    = 0
[pid   332] close(4)                    = 0
[pid   332] mkdir("./file1", 0777)      = 0
[   26.644390][  T332] loop0: detected capacity change from 0 to 1024
[pid   332] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   332] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   332] chdir("./file1")            = 0
[pid   332] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   332] ioctl(4, LOOP_CLR_FD)       = 0
[pid   332] close(4)                    = 0
[pid   332] chdir("./file0")            = 0
[pid   332] creat("./bus", 000)         = 4
[pid   332] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   332] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   332] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   332] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   332] exit_group(0)               = ?
[pid   332] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=332, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./10/file1")                     = -1 EBUSY (Device or resource busy)
[   26.724582][  T332] EXT4-fs (loop0): Ignoring removed orlov option
[   26.730783][  T332] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   26.745538][  T332] 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. Quota mode: none.
umount2("./10/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./10/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 335
./strace-static-x86_64: Process 335 attached
[pid   335] set_robust_list(0x555589314660, 24) = 0
[pid   335] chdir("./11")               = 0
[pid   335] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   335] setpgid(0, 0)               = 0
[pid   335] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   335] write(3, "1000", 4)         = 4
[pid   335] close(3)                    = 0
[pid   335] symlink("/dev/binderfs", "./binderfs") = 0
[pid   335] write(1, "executing program\n", 18) = 18
[pid   335] memfd_create("syzkaller", 0) = 3
[pid   335] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   335] 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   335] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   335] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   335] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   335] close(3)                    = 0
[pid   335] close(4)                    = 0
[pid   335] mkdir("./file1", 0777)      = 0
[   26.855947][  T335] loop0: detected capacity change from 0 to 1024
[   26.944565][  T335] EXT4-fs (loop0): Ignoring removed orlov option
[   26.951056][  T335] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   335] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   335] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   335] chdir("./file1")            = 0
[pid   335] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   335] ioctl(4, LOOP_CLR_FD)       = 0
[pid   335] close(4)                    = 0
[pid   335] chdir("./file0")            = 0
[pid   335] creat("./bus", 000)         = 4
[pid   335] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   335] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   335] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   335] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   335] exit_group(0)               = ?
[pid   335] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=335, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./11/file1")                     = -1 EBUSY (Device or resource busy)
[   26.975414][  T335] 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. Quota mode: none.
umount2("./11/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./11/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./11")                           = 0
mkdir("./12", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 338
./strace-static-x86_64: Process 338 attached
[pid   338] set_robust_list(0x555589314660, 24) = 0
[pid   338] chdir("./12")               = 0
[pid   338] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   338] setpgid(0, 0)               = 0
[pid   338] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   338] write(3, "1000", 4)         = 4
[pid   338] close(3)                    = 0
[pid   338] symlink("/dev/binderfs", "./binderfs"executing program
) = 0
[pid   338] write(1, "executing program\n", 18) = 18
[pid   338] memfd_create("syzkaller", 0) = 3
[pid   338] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   338] 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   338] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   338] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   338] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   338] close(3)                    = 0
[pid   338] close(4)                    = 0
[pid   338] mkdir("./file1", 0777)      = 0
[   27.125487][  T338] loop0: detected capacity change from 0 to 1024
[pid   338] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   338] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   338] chdir("./file1")            = 0
[pid   338] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   338] ioctl(4, LOOP_CLR_FD)       = 0
[pid   338] close(4)                    = 0
[pid   338] chdir("./file0")            = 0
[pid   338] creat("./bus", 000)         = 4
[pid   338] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   338] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   338] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   338] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   338] exit_group(0)               = ?
[pid   338] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=338, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./12/file1")                     = -1 EBUSY (Device or resource busy)
[   27.204599][  T338] EXT4-fs (loop0): Ignoring removed orlov option
[   27.210805][  T338] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   27.225465][  T338] 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. Quota mode: none.
umount2("./12/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./12/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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(3executing program
)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 341
./strace-static-x86_64: Process 341 attached
[pid   341] set_robust_list(0x555589314660, 24) = 0
[pid   341] chdir("./13")               = 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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   27.368710][  T341] loop0: detected capacity change from 0 to 1024
[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=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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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
newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0
getdents64(5, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./13/file1")                     = -1 EBUSY (Device or resource busy)
[   27.456200][  T341] EXT4-fs (loop0): Ignoring removed orlov option
[   27.462387][  T341] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   27.475391][  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. Quota mode: none.
umount2("./13/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./13/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./13")                           = 0
mkdir("./14", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 345
./strace-static-x86_64: Process 345 attached
[pid   345] set_robust_list(0x555589314660, 24) = 0
[pid   345] chdir("./14")               = 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", 18) = 18
[pid   345] memfd_create("syzkaller", 0) = 3
[pid   345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   27.605126][  T345] loop0: detected capacity change from 0 to 1024
[   27.613894][  T345] EXT4-fs (loop0): Ignoring removed orlov option
[   27.620538][  T345] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[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=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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./14/file1")                     = -1 EBUSY (Device or resource busy)
[   27.635866][  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. Quota mode: none.
umount2("./14/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./14/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./14")                           = 0
mkdir("./15", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 348
./strace-static-x86_64: Process 348 attached
[pid   348] set_robust_list(0x555589314660, 24) = 0
[pid   348] chdir("./15")               = 0
[pid   348] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   348] setpgid(0, 0)               = 0
[pid   348] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   348] write(3, "1000", 4)         = 4
[pid   348] close(3)                    = 0
[pid   348] symlink("/dev/binderfs", "./binderfs"executing program
) = 0
[pid   348] write(1, "executing program\n", 18) = 18
[pid   348] memfd_create("syzkaller", 0) = 3
[pid   348] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   348] 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   348] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   348] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   348] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   348] close(3)                    = 0
[pid   348] close(4)                    = 0
[pid   348] mkdir("./file1", 0777)      = 0
[   27.745262][  T348] loop0: detected capacity change from 0 to 1024
[pid   348] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   348] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   348] chdir("./file1")            = 0
[pid   348] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   348] ioctl(4, LOOP_CLR_FD)       = 0
[pid   348] close(4)                    = 0
[pid   348] chdir("./file0")            = 0
[pid   348] creat("./bus", 000)         = 4
[pid   348] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   348] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   348] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   348] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   348] exit_group(0)               = ?
[pid   348] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=348, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./15/file1")                     = -1 EBUSY (Device or resource busy)
[   27.834533][  T348] EXT4-fs (loop0): Ignoring removed orlov option
[   27.840853][  T348] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   27.855639][  T348] 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. Quota mode: none.
umount2("./15/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./15/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 351
./strace-static-x86_64: Process 351 attached
[pid   351] set_robust_list(0x555589314660, 24) = 0
[pid   351] chdir("./16")               = 0
[pid   351] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   351] setpgid(0, 0)               = 0
[pid   351] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   351] write(3, "1000", 4)         = 4
[pid   351] close(3)                    = 0
[pid   351] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   351] write(1, "executing program\n", 18) = 18
[pid   351] memfd_create("syzkaller", 0) = 3
[pid   351] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   351] 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   351] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   351] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   351] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   351] close(3)                    = 0
[pid   351] close(4)                    = 0
[pid   351] mkdir("./file1", 0777)      = 0
[   27.966351][  T351] loop0: detected capacity change from 0 to 1024
[pid   351] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   351] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   351] chdir("./file1")            = 0
[pid   351] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   351] ioctl(4, LOOP_CLR_FD)       = 0
[pid   351] close(4)                    = 0
[pid   351] chdir("./file0")            = 0
[pid   351] creat("./bus", 000)         = 4
[pid   351] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   351] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   351] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   351] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   351] exit_group(0)               = ?
[pid   351] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=351, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./16/file1")                     = -1 EBUSY (Device or resource busy)
[   28.015741][  T351] EXT4-fs (loop0): Ignoring removed orlov option
[   28.022156][  T351] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   28.035566][  T351] 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. Quota mode: none.
umount2("./16/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./16/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./16")                           = 0
mkdir("./17", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 354
./strace-static-x86_64: Process 354 attached
[pid   354] set_robust_list(0x555589314660, 24) = 0
[pid   354] chdir("./17")               = 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"executing program
) = 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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   28.148275][  T354] loop0: detected capacity change from 0 to 1024
[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=4} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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)
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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./17/file1")                     = -1 EBUSY (Device or resource busy)
[   28.224547][  T354] EXT4-fs (loop0): Ignoring removed orlov option
[   28.231026][  T354] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   28.245431][  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. Quota mode: none.
umount2("./17/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./17/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 357
./strace-static-x86_64: Process 357 attached
[pid   357] set_robust_list(0x555589314660, 24) = 0
[pid   357] chdir("./18")               = 0
[pid   357] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   357] setpgid(0, 0)               = 0
[pid   357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   357] write(3, "1000", 4executing program
)         = 4
[pid   357] close(3)                    = 0
[pid   357] symlink("/dev/binderfs", "./binderfs") = 0
[pid   357] write(1, "executing program\n", 18) = 18
[pid   357] memfd_create("syzkaller", 0) = 3
[pid   357] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   357] 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   357] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   357] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   357] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   357] close(3)                    = 0
[pid   357] close(4)                    = 0
[pid   357] mkdir("./file1", 0777)      = 0
[   28.339242][  T357] loop0: detected capacity change from 0 to 1024
[pid   357] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   357] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   357] chdir("./file1")            = 0
[pid   357] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   357] ioctl(4, LOOP_CLR_FD)       = 0
[pid   357] close(4)                    = 0
[pid   357] chdir("./file0")            = 0
[pid   357] creat("./bus", 000)         = 4
[pid   357] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   357] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   357] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   357] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   357] exit_group(0)               = ?
[pid   357] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=357, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./18/file1")                     = -1 EBUSY (Device or resource busy)
[   28.434555][  T357] EXT4-fs (loop0): Ignoring removed orlov option
[   28.440807][  T357] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   28.455711][  T357] 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. Quota mode: none.
umount2("./18/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./18/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./18")                           = 0
mkdir("./19", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 361 attached
 <unfinished ...>
[pid   361] set_robust_list(0x555589314660, 24) = 0
[pid   361] chdir("./19" <unfinished ...>
[pid   295] <... clone resumed>, child_tidptr=0x555589314650) = 361
[pid   361] <... chdir resumed>)        = 0
[pid   361] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   361] setpgid(0, 0)               = 0
[pid   361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   361] write(3, "1000", 4)         = 4
[pid   361] close(3)                    = 0
[pid   361] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   361] write(1, "executing program\n", 18) = 18
[pid   361] memfd_create("syzkaller", 0) = 3
[pid   361] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   361] 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   361] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   361] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   361] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   361] close(3)                    = 0
[pid   361] close(4)                    = 0
[pid   361] mkdir("./file1", 0777)      = 0
[   28.602713][  T361] loop0: detected capacity change from 0 to 1024
[   28.613307][  T361] EXT4-fs (loop0): Ignoring removed orlov option
[   28.620144][  T361] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   361] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   361] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   361] chdir("./file1")            = 0
[pid   361] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   361] ioctl(4, LOOP_CLR_FD)       = 0
[pid   361] close(4)                    = 0
[pid   361] chdir("./file0")            = 0
[pid   361] creat("./bus", 000)         = 4
[pid   361] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   361] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   361] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   361] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   361] exit_group(0)               = ?
[pid   361] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=361, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./19/file1")                     = -1 EBUSY (Device or resource busy)
[   28.635523][  T361] 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. Quota mode: none.
umount2("./19/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./19/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 365
./strace-static-x86_64: Process 365 attached
[pid   365] set_robust_list(0x555589314660, 24) = 0
[pid   365] chdir("./20")               = 0
[pid   365] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   365] setpgid(0, 0)               = 0
[pid   365] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   365] write(3, "1000", 4)         = 4
[pid   365] close(3)                    = 0
[pid   365] symlink("/dev/binderfs", "./binderfs") = 0
[pid   365] write(1, "executing program\n", 18executing program
) = 18
[pid   365] memfd_create("syzkaller", 0) = 3
[pid   365] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   365] 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   365] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   365] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   365] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   365] close(3)                    = 0
[pid   365] close(4)                    = 0
[pid   365] mkdir("./file1", 0777)      = 0
[   28.811572][  T365] loop0: detected capacity change from 0 to 1024
[   28.822270][  T365] EXT4-fs (loop0): Ignoring removed orlov option
[   28.828594][  T365] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   365] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   365] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   365] chdir("./file1")            = 0
[pid   365] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   365] ioctl(4, LOOP_CLR_FD)       = 0
[pid   365] close(4)                    = 0
[pid   365] chdir("./file0")            = 0
[pid   365] creat("./bus", 000)         = 4
[pid   365] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   365] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   365] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   365] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   365] exit_group(0)               = ?
[pid   365] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=365, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 5 entries */, 32768) = 136
umount2("./20/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./20/file1")                     = -1 EBUSY (Device or resource busy)
[   28.845586][  T365] 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. Quota mode: none.
umount2("./20/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./20/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 368
./strace-static-x86_64: Process 368 attached
[pid   368] set_robust_list(0x555589314660, 24) = 0
[pid   368] chdir("./21")               = 0
[pid   368] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   368] setpgid(0, 0)               = 0
[pid   368] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   368] write(3, "1000", 4)         = 4
[pid   368] close(3)                    = 0
[pid   368] symlink("/dev/binderfs", "./binderfs") = 0
[pid   368] write(1, "executing program\n", 18) = 18
[pid   368] memfd_create("syzkaller", 0) = 3
[pid   368] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   368] 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   368] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   368] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   368] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   368] close(3)                    = 0
[pid   368] close(4)                    = 0
[pid   368] mkdir("./file1", 0777)      = 0
[   29.005233][  T368] loop0: detected capacity change from 0 to 1024
[pid   368] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   368] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   368] chdir("./file1")            = 0
[pid   368] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   368] ioctl(4, LOOP_CLR_FD)       = 0
[pid   368] close(4)                    = 0
[pid   368] chdir("./file0")            = 0
[pid   368] creat("./bus", 000)         = 4
[pid   368] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   368] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   368] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   368] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   368] exit_group(0)               = ?
[pid   368] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=368, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
[   29.095901][  T368] EXT4-fs (loop0): Ignoring removed orlov option
[   29.102111][  T368] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   29.115460][  T368] 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. Quota mode: none.
close(4)                                = 0
rmdir("./21/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./21/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./21/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./21")                           = 0
mkdir("./22", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 371
./strace-static-x86_64: Process 371 attached
[pid   371] set_robust_list(0x555589314660, 24) = 0
[pid   371] chdir("./22")               = 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", 18executing program
) = 18
[pid   371] memfd_create("syzkaller", 0) = 3
[pid   371] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   29.290505][  T371] loop0: detected capacity change from 0 to 1024
[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=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./22/file1")                     = -1 EBUSY (Device or resource busy)
[   29.374601][  T371] EXT4-fs (loop0): Ignoring removed orlov option
[   29.380814][  T371] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   29.395460][  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. Quota mode: none.
umount2("./22/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./22/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 375
./strace-static-x86_64: Process 375 attached
[pid   375] set_robust_list(0x555589314660, 24) = 0
[pid   375] chdir("./23")               = 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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   29.500750][  T375] loop0: detected capacity change from 0 to 1024
[   29.511144][  T375] EXT4-fs (loop0): Ignoring removed orlov option
[   29.517683][  T375] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[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=4} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./23/file1")                     = -1 EBUSY (Device or resource busy)
[   29.536162][  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. Quota mode: none.
umount2("./23/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./23/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 378
./strace-static-x86_64: Process 378 attached
[pid   378] set_robust_list(0x555589314660, 24) = 0
[pid   378] chdir("./24")               = 0
[pid   378] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   378] setpgid(0, 0)               = 0
[pid   378] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   378] write(3, "1000", 4)         = 4
[pid   378] close(3)                    = 0
[pid   378] symlink("/dev/binderfs", "./binderfs") = 0
[pid   378] write(1, "executing program\n", 18executing program
) = 18
[pid   378] memfd_create("syzkaller", 0) = 3
[pid   378] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   378] 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   378] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   378] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   378] close(3)                    = 0
[pid   378] close(4)                    = 0
[pid   378] mkdir("./file1", 0777)      = 0
[   29.671533][  T378] loop0: detected capacity change from 0 to 1024
[   29.704990][  T378] EXT4-fs (loop0): Ignoring removed orlov option
[   29.711841][  T378] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   378] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   378] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   378] chdir("./file1")            = 0
[pid   378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   378] ioctl(4, LOOP_CLR_FD)       = 0
[pid   378] close(4)                    = 0
[pid   378] chdir("./file0")            = 0
[pid   378] creat("./bus", 000)         = 4
[pid   378] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   378] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   378] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   378] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   378] exit_group(0)               = ?
[pid   378] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=378, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./24/file1")                     = -1 EBUSY (Device or resource busy)
[   29.726261][  T378] 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. Quota mode: none.
umount2("./24/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./24/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 381
./strace-static-x86_64: Process 381 attached
[pid   381] set_robust_list(0x555589314660, 24) = 0
[pid   381] chdir("./25")               = 0
[pid   381] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   381] setpgid(0, 0)               = 0
[pid   381] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   381] write(3, "1000", 4)         = 4
[pid   381] close(3)                    = 0
[pid   381] symlink("/dev/binderfs", "./binderfs") = 0
[pid   381] write(1, "executing program\n", 18) = 18
[pid   381] memfd_create("syzkaller", 0) = 3
[pid   381] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   381] 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   381] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   381] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   381] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   381] close(3)                    = 0
[pid   381] close(4)                    = 0
[pid   381] mkdir("./file1", 0777)      = 0
[   29.885408][  T381] loop0: detected capacity change from 0 to 1024
[   29.893655][  T381] EXT4-fs (loop0): Ignoring removed orlov option
[   29.899941][  T381] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   381] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   381] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   381] chdir("./file1")            = 0
[pid   381] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   381] ioctl(4, LOOP_CLR_FD)       = 0
[pid   381] close(4)                    = 0
[pid   381] chdir("./file0")            = 0
[pid   381] creat("./bus", 000)         = 4
[pid   381] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   381] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   381] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   381] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   381] exit_group(0)               = ?
[pid   381] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=381, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./25/file1")                     = -1 EBUSY (Device or resource busy)
[   29.915441][  T381] 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. Quota mode: none.
umount2("./25/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./25/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 384
./strace-static-x86_64: Process 384 attached
[pid   384] set_robust_list(0x555589314660, 24) = 0
[pid   384] chdir("./26")               = 0
[pid   384] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   384] setpgid(0, 0)               = 0
[pid   384] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   384] write(3, "1000", 4)         = 4
[pid   384] close(3)                    = 0
[pid   384] symlink("/dev/binderfs", "./binderfs") = 0
[pid   384] write(1, "executing program\n", 18) = 18
[pid   384] memfd_create("syzkaller", 0) = 3
[pid   384] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   384] 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   384] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   384] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   384] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   384] close(3)                    = 0
[pid   384] close(4)                    = 0
[pid   384] mkdir("./file1", 0777)      = 0
[   30.015924][  T384] loop0: detected capacity change from 0 to 1024
[pid   384] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   384] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   384] chdir("./file1")            = 0
[pid   384] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   384] ioctl(4, LOOP_CLR_FD)       = 0
[pid   384] close(4)                    = 0
[pid   384] chdir("./file0")            = 0
[pid   384] creat("./bus", 000)         = 4
[pid   384] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   384] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   384] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   384] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   384] exit_group(0)               = ?
[pid   384] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=384, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./26/file1")                     = -1 EBUSY (Device or resource busy)
[   30.094651][  T384] EXT4-fs (loop0): Ignoring removed orlov option
[   30.101036][  T384] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   30.115566][  T384] 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. Quota mode: none.
umount2("./26/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./26/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 387
./strace-static-x86_64: Process 387 attached
[pid   387] set_robust_list(0x555589314660, 24) = 0
[pid   387] chdir("./27")               = 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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   30.187408][  T387] loop0: detected capacity change from 0 to 1024
[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=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./27/file1")                     = -1 EBUSY (Device or resource busy)
[   30.274536][  T387] EXT4-fs (loop0): Ignoring removed orlov option
[   30.280896][  T387] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   30.295588][  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. Quota mode: none.
umount2("./27/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./27/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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|SIGCHLDexecuting program
, child_tidptr=0x555589314650) = 390
./strace-static-x86_64: Process 390 attached
[pid   390] set_robust_list(0x555589314660, 24) = 0
[pid   390] chdir("./28")               = 0
[pid   390] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   390] setpgid(0, 0)               = 0
[pid   390] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   390] write(3, "1000", 4)         = 4
[pid   390] close(3)                    = 0
[pid   390] symlink("/dev/binderfs", "./binderfs") = 0
[pid   390] write(1, "executing program\n", 18) = 18
[pid   390] memfd_create("syzkaller", 0) = 3
[pid   390] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   390] 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   390] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   390] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   390] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   390] close(3)                    = 0
[pid   390] close(4)                    = 0
[pid   390] mkdir("./file1", 0777)      = 0
[   30.376060][  T390] loop0: detected capacity change from 0 to 1024
[pid   390] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   390] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   390] chdir("./file1")            = 0
[pid   390] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   390] ioctl(4, LOOP_CLR_FD)       = 0
[pid   390] close(4)                    = 0
[pid   390] chdir("./file0")            = 0
[pid   390] creat("./bus", 000)         = 4
[pid   390] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   390] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   390] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   390] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   390] exit_group(0)               = ?
[pid   390] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=390, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./28/file1")                     = -1 EBUSY (Device or resource busy)
[   30.454561][  T390] EXT4-fs (loop0): Ignoring removed orlov option
[   30.460961][  T390] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   30.475454][  T390] 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. Quota mode: none.
umount2("./28/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./28/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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(3executing program
)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 394
./strace-static-x86_64: Process 394 attached
[pid   394] set_robust_list(0x555589314660, 24) = 0
[pid   394] chdir("./29")               = 0
[pid   394] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   394] setpgid(0, 0)               = 0
[pid   394] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   394] write(3, "1000", 4)         = 4
[pid   394] close(3)                    = 0
[pid   394] symlink("/dev/binderfs", "./binderfs") = 0
[pid   394] write(1, "executing program\n", 18) = 18
[pid   394] memfd_create("syzkaller", 0) = 3
[pid   394] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   394] 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   394] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   394] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   394] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   394] close(3)                    = 0
[pid   394] close(4)                    = 0
[pid   394] mkdir("./file1", 0777)      = 0
[   30.648250][  T394] loop0: detected capacity change from 0 to 1024
[pid   394] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   394] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   394] chdir("./file1")            = 0
[pid   394] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   394] ioctl(4, LOOP_CLR_FD)       = 0
[pid   394] close(4)                    = 0
[pid   394] chdir("./file0")            = 0
[pid   394] creat("./bus", 000)         = 4
[pid   394] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   394] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   394] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   394] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   394] exit_group(0)               = ?
[pid   394] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=394, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./29/file1")                     = -1 EBUSY (Device or resource busy)
[   30.714690][  T394] EXT4-fs (loop0): Ignoring removed orlov option
[   30.721011][  T394] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   30.735611][  T394] 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. Quota mode: none.
umount2("./29/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./29/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./29")                           = 0
mkdir("./30", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program
, child_tidptr=0x555589314650) = 397
./strace-static-x86_64: Process 397 attached
[pid   397] set_robust_list(0x555589314660, 24) = 0
[pid   397] chdir("./30")               = 0
[pid   397] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   397] setpgid(0, 0)               = 0
[pid   397] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   397] write(3, "1000", 4)         = 4
[pid   397] close(3)                    = 0
[pid   397] symlink("/dev/binderfs", "./binderfs") = 0
[pid   397] write(1, "executing program\n", 18) = 18
[pid   397] memfd_create("syzkaller", 0) = 3
[pid   397] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   397] 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   397] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   397] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   397] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   397] close(3)                    = 0
[pid   397] close(4)                    = 0
[pid   397] mkdir("./file1", 0777)      = 0
[   30.886078][  T397] loop0: detected capacity change from 0 to 1024
[pid   397] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   397] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   397] chdir("./file1")            = 0
[pid   397] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   397] ioctl(4, LOOP_CLR_FD)       = 0
[pid   397] close(4)                    = 0
[pid   397] chdir("./file0")            = 0
[pid   397] creat("./bus", 000)         = 4
[pid   397] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   397] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   397] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   397] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   397] exit_group(0)               = ?
[pid   397] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=397, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./30/file1")                     = -1 EBUSY (Device or resource busy)
[   30.974612][  T397] EXT4-fs (loop0): Ignoring removed orlov option
[   30.980830][  T397] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   30.995535][  T397] 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. Quota mode: none.
umount2("./30/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./30/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 400
./strace-static-x86_64: Process 400 attached
[pid   400] set_robust_list(0x555589314660, 24) = 0
[pid   400] chdir("./31")               = 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", 18executing program
) = 18
[pid   400] memfd_create("syzkaller", 0) = 3
[pid   400] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   31.091005][  T400] loop0: detected capacity change from 0 to 1024
[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("./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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./31/file1")                     = -1 EBUSY (Device or resource busy)
[   31.174520][  T400] EXT4-fs (loop0): Ignoring removed orlov option
[   31.180852][  T400] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   31.195731][  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. Quota mode: none.
umount2("./31/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./31/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 404
./strace-static-x86_64: Process 404 attached
[pid   404] set_robust_list(0x555589314660, 24) = 0
[pid   404] chdir("./32")               = 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
[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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   31.330607][  T404] loop0: detected capacity change from 0 to 1024
[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=2} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./32/file1")                     = -1 EBUSY (Device or resource busy)
[   31.414604][  T404] EXT4-fs (loop0): Ignoring removed orlov option
[   31.421288][  T404] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   31.435608][  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. Quota mode: none.
umount2("./32/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./32/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 408
./strace-static-x86_64: Process 408 attached
[pid   408] set_robust_list(0x555589314660, 24) = 0
[pid   408] chdir("./33"executing program
)               = 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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   31.568119][  T408] loop0: detected capacity change from 0 to 1024
[   31.644586][  T408] EXT4-fs (loop0): Ignoring removed orlov option
[   31.650800][  T408] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[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("./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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./33/file1")                     = -1 EBUSY (Device or resource busy)
[   31.675546][  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. Quota mode: none.
umount2("./33/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./33/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 411
./strace-static-x86_64: Process 411 attached
[pid   411] set_robust_list(0x555589314660, 24) = 0
[pid   411] chdir("./34")               = 0
[pid   411] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   411] setpgid(0, 0)               = 0
[pid   411] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   411] write(3, "1000", 4)         = 4
[pid   411] close(3)                    = 0
[pid   411] symlink("/dev/binderfs", "./binderfs") = 0
[pid   411] write(1, "executing program\n", 18executing program
) = 18
[pid   411] memfd_create("syzkaller", 0) = 3
[pid   411] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   411] 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   411] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   411] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   411] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   411] close(3)                    = 0
[pid   411] close(4)                    = 0
[pid   411] mkdir("./file1", 0777)      = 0
[   31.811552][  T411] loop0: detected capacity change from 0 to 1024
[pid   411] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   411] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   411] chdir("./file1")            = 0
[pid   411] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   411] ioctl(4, LOOP_CLR_FD)       = 0
[pid   411] close(4)                    = 0
[pid   411] chdir("./file0")            = 0
[pid   411] creat("./bus", 000)         = 4
[pid   411] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   411] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   411] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   411] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   411] exit_group(0)               = ?
[pid   411] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=411, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./34/file1")                     = -1 EBUSY (Device or resource busy)
[   31.894630][  T411] EXT4-fs (loop0): Ignoring removed orlov option
[   31.901009][  T411] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   31.915620][  T411] 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. Quota mode: none.
umount2("./34/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./34/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./34")                           = 0
mkdir("./35", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 414
./strace-static-x86_64: Process 414 attached
[pid   414] set_robust_list(0x555589314660, 24) = 0
[pid   414] chdir("./35")               = 0
[pid   414] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   414] setpgid(0, 0)               = 0
[pid   414] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   414] write(3, "1000", 4)         = 4
[pid   414] close(3)                    = 0
[pid   414] symlink("/dev/binderfs", "./binderfs") = 0
[pid   414] write(1, "executing program\n", 18executing program
) = 18
[pid   414] memfd_create("syzkaller", 0) = 3
[pid   414] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   414] 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   414] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   414] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   414] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   414] close(3)                    = 0
[pid   414] close(4)                    = 0
[pid   414] mkdir("./file1", 0777)      = 0
[   32.049996][  T414] loop0: detected capacity change from 0 to 1024
[   32.060957][  T414] EXT4-fs (loop0): Ignoring removed orlov option
[   32.067303][  T414] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   414] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   414] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   414] chdir("./file1")            = 0
[pid   414] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   414] ioctl(4, LOOP_CLR_FD)       = 0
[pid   414] close(4)                    = 0
[pid   414] chdir("./file0")            = 0
[pid   414] creat("./bus", 000)         = 4
[pid   414] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   414] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   414] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   414] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   414] exit_group(0)               = ?
[pid   414] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=414, si_uid=0, si_status=0, si_utime=0, si_stime=5} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./35/file1")                     = -1 EBUSY (Device or resource busy)
[   32.085711][  T414] 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. Quota mode: none.
umount2("./35/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./35/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 417
./strace-static-x86_64: Process 417 attached
[pid   417] set_robust_list(0x555589314660, 24) = 0
[pid   417] chdir("./36")               = 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_CLOEXECexecuting program
) = 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) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   32.250064][  T417] loop0: detected capacity change from 0 to 1024
[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=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./36/file1")                     = -1 EBUSY (Device or resource busy)
[   32.334654][  T417] EXT4-fs (loop0): Ignoring removed orlov option
[   32.340889][  T417] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   32.355504][  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. Quota mode: none.
umount2("./36/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./36/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./36")                           = 0
mkdir("./37", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 420
./strace-static-x86_64: Process 420 attached
[pid   420] set_robust_list(0x555589314660, 24) = 0
[pid   420] chdir("./37")               = 0
[pid   420] prctl(PR_SET_PDEATHSIG, SIGKILLexecuting program
) = 0
[pid   420] setpgid(0, 0)               = 0
[pid   420] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   420] write(3, "1000", 4)         = 4
[pid   420] close(3)                    = 0
[pid   420] symlink("/dev/binderfs", "./binderfs") = 0
[pid   420] write(1, "executing program\n", 18) = 18
[pid   420] memfd_create("syzkaller", 0) = 3
[pid   420] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   420] 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   420] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   420] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   420] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   420] close(3)                    = 0
[pid   420] close(4)                    = 0
[pid   420] mkdir("./file1", 0777)      = 0
[   32.490054][  T420] loop0: detected capacity change from 0 to 1024
[pid   420] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   420] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   420] chdir("./file1")            = 0
[pid   420] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   420] ioctl(4, LOOP_CLR_FD)       = 0
[pid   420] close(4)                    = 0
[pid   420] chdir("./file0")            = 0
[pid   420] creat("./bus", 000)         = 4
[pid   420] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   420] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   420] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   420] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   420] exit_group(0)               = ?
[pid   420] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=420, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./37/file1")                     = -1 EBUSY (Device or resource busy)
[   32.584669][  T420] EXT4-fs (loop0): Ignoring removed orlov option
[   32.591380][  T420] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   32.605500][  T420] 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. Quota mode: none.
umount2("./37/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./37/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./37")                           = 0
mkdir("./38", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 424
./strace-static-x86_64: Process 424 attached
[pid   424] set_robust_list(0x555589314660, 24) = 0
[pid   424] chdir("./38")               = 0
[pid   424] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   424] setpgid(0, 0)               = 0
[pid   424] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   424] write(3, "1000", 4)         = 4
[pid   424] close(3)                    = 0
[pid   424] symlink("/dev/binderfs", "./binderfs") = 0
[pid   424] write(1, "executing program\n", 18executing program
) = 18
[pid   424] memfd_create("syzkaller", 0) = 3
[pid   424] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   424] 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   424] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   424] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   424] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   424] close(3)                    = 0
[pid   424] close(4)                    = 0
[pid   424] mkdir("./file1", 0777)      = 0
[   32.772492][  T424] loop0: detected capacity change from 0 to 1024
[pid   424] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   424] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   424] chdir("./file1")            = 0
[pid   424] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   424] ioctl(4, LOOP_CLR_FD)       = 0
[pid   424] close(4)                    = 0
[pid   424] chdir("./file0")            = 0
[pid   424] creat("./bus", 000)         = 4
[pid   424] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   424] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   424] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   424] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   424] exit_group(0)               = ?
[pid   424] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=424, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./38/file1")                     = -1 EBUSY (Device or resource busy)
[   32.826840][  T424] EXT4-fs (loop0): Ignoring removed orlov option
[   32.833106][  T424] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   32.845630][  T424] 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. Quota mode: none.
umount2("./38/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./38/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 427
./strace-static-x86_64: Process 427 attached
[pid   427] set_robust_list(0x555589314660, 24) = 0
[pid   427] chdir("./39")               = 0
[pid   427] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   427] setpgid(0, 0)               = 0
[pid   427] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   427] write(3, "1000", 4)         = 4
[pid   427] close(3)                    = 0
[pid   427] symlink("/dev/binderfs", "./binderfs") = 0
[pid   427] write(1, "executing program\n", 18executing program
) = 18
[pid   427] memfd_create("syzkaller", 0) = 3
[pid   427] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   427] 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   427] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   427] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   427] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   427] close(3)                    = 0
[pid   427] close(4)                    = 0
[pid   427] mkdir("./file1", 0777)      = 0
[   33.010000][  T427] loop0: detected capacity change from 0 to 1024
[pid   427] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   427] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   427] chdir("./file1")            = 0
[pid   427] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   427] ioctl(4, LOOP_CLR_FD)       = 0
[pid   427] close(4)                    = 0
[pid   427] chdir("./file0")            = 0
[pid   427] creat("./bus", 000)         = 4
[pid   427] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   427] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   427] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   427] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   427] exit_group(0)               = ?
[pid   427] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=427, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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)
[   33.094568][  T427] EXT4-fs (loop0): Ignoring removed orlov option
[   33.100781][  T427] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   33.115466][  T427] 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. Quota mode: none.
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./39/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./39/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./39/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 430
./strace-static-x86_64: Process 430 attached
[pid   430] set_robust_list(0x555589314660, 24) = 0
[pid   430] chdir("./40")               = 0
[pid   430] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   430] setpgid(0, 0)               = 0
[pid   430] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   430] write(3, "1000", 4)         = 4
[pid   430] close(3)                    = 0
[pid   430] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   430] write(1, "executing program\n", 18) = 18
[pid   430] memfd_create("syzkaller", 0) = 3
[pid   430] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   430] 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   430] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   430] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   430] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   430] close(3)                    = 0
[pid   430] close(4)                    = 0
[pid   430] mkdir("./file1", 0777)      = 0
[   33.285471][  T430] loop0: detected capacity change from 0 to 1024
[pid   430] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   430] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   430] chdir("./file1")            = 0
[pid   430] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   430] ioctl(4, LOOP_CLR_FD)       = 0
[pid   430] close(4)                    = 0
[pid   430] chdir("./file0")            = 0
[pid   430] creat("./bus", 000)         = 4
[pid   430] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   430] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   430] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   430] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   430] exit_group(0)               = ?
[pid   430] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=430, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./40/file1")                     = -1 EBUSY (Device or resource busy)
[   33.374573][  T430] EXT4-fs (loop0): Ignoring removed orlov option
[   33.380838][  T430] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   33.395369][  T430] 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. Quota mode: none.
umount2("./40/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./40/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 433
./strace-static-x86_64: Process 433 attached
[pid   433] set_robust_list(0x555589314660, 24) = 0
[pid   433] chdir("./41")               = 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", 18executing program
) = 18
[pid   433] memfd_create("syzkaller", 0) = 3
[pid   433] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[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(0x7f0c5a17d000, 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
[   33.510619][  T433] loop0: detected capacity change from 0 to 1024
[   33.544787][  T433] EXT4-fs (loop0): Ignoring removed orlov option
[   33.551256][  T433] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[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=3} ---
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, 0x5555893156f0 /* 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
[   33.565804][  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. Quota mode: none.
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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./41/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./41/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./41/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 0 entries */, 32768) = 0
close(3)                                = 0
rmdir("./41")                           = 0
mkdir("./42", 0777)                     = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555589314650) = 437
./strace-static-x86_64: Process 437 attached
[pid   437] set_robust_list(0x555589314660, 24) = 0
[pid   437] chdir("./42")               = 0
[pid   437] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   437] setpgid(0, 0)               = 0
[pid   437] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   437] write(3, "1000", 4)         = 4
[pid   437] close(3)                    = 0
[pid   437] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   437] write(1, "executing program\n", 18) = 18
[pid   437] memfd_create("syzkaller", 0) = 3
[pid   437] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   437] 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   437] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   437] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   437] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   437] close(3)                    = 0
[pid   437] close(4)                    = 0
[pid   437] mkdir("./file1", 0777)      = 0
[   33.727218][  T437] loop0: detected capacity change from 0 to 1024
[pid   437] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   437] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   437] chdir("./file1")            = 0
[pid   437] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   437] ioctl(4, LOOP_CLR_FD)       = 0
[pid   437] close(4)                    = 0
[pid   437] chdir("./file0")            = 0
[pid   437] creat("./bus", 000)         = 4
[pid   437] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   437] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   437] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   437] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   437] exit_group(0)               = ?
[pid   437] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=437, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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)
[   33.794827][  T437] EXT4-fs (loop0): Ignoring removed orlov option
[   33.801229][  T437] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   33.815721][  T437] 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. Quota mode: none.
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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./42/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./42/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./42/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 441
./strace-static-x86_64: Process 441 attached
[pid   441] set_robust_list(0x555589314660, 24) = 0
[pid   441] chdir("./43")               = 0
[pid   441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   441] setpgid(0, 0)               = 0
[pid   441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   441] write(3, "1000", 4)         = 4
[pid   441] close(3)                    = 0
[pid   441] symlink("/dev/binderfs", "./binderfs") = 0
[pid   441] write(1, "executing program\n", 18executing program
) = 18
[pid   441] memfd_create("syzkaller", 0) = 3
[pid   441] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   441] 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   441] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   441] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   441] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   441] close(3)                    = 0
[pid   441] close(4)                    = 0
[pid   441] mkdir("./file1", 0777)      = 0
[   33.967314][  T441] loop0: detected capacity change from 0 to 1024
[   33.978686][  T441] EXT4-fs (loop0): Ignoring removed orlov option
[   33.985309][  T441] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[pid   441] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   441] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   441] chdir("./file1")            = 0
[pid   441] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   441] ioctl(4, LOOP_CLR_FD)       = 0
[pid   441] close(4)                    = 0
[pid   441] chdir("./file0")            = 0
[pid   441] creat("./bus", 000)         = 4
[pid   441] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   441] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   441] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   441] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   441] exit_group(0)               = ?
[pid   441] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=441, 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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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
[   33.995559][  T441] 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. Quota mode: none.
getdents64(5, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./43/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./43/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./43/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 444
./strace-static-x86_64: Process 444 attached
[pid   444] set_robust_list(0x555589314660, 24) = 0
[pid   444] chdir("./44")               = 0
[pid   444] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   444] setpgid(0, 0)               = 0
[pid   444] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   444] write(3, "1000", 4)         = 4
[pid   444] close(3)                    = 0
[pid   444] symlink("/dev/binderfs", "./binderfs") = 0
[pid   444] write(1, "executing program\n", 18) = 18
[pid   444] memfd_create("syzkaller", 0) = 3
[pid   444] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   444] 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   444] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   444] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   444] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   444] close(3)                    = 0
[pid   444] close(4)                    = 0
[pid   444] mkdir("./file1", 0777)      = 0
[   34.115638][  T444] loop0: detected capacity change from 0 to 1024
[pid   444] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   444] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   444] chdir("./file1")            = 0
[pid   444] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   444] ioctl(4, LOOP_CLR_FD)       = 0
[pid   444] close(4)                    = 0
[pid   444] chdir("./file0")            = 0
[pid   444] creat("./bus", 000)         = 4
[pid   444] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   444] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   444] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   444] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   444] exit_group(0)               = ?
[pid   444] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=444, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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
[   34.194679][  T444] EXT4-fs (loop0): Ignoring removed orlov option
[   34.201175][  T444] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   34.215927][  T444] 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. Quota mode: none.
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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./44/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./44/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program
) = 0
rmdir("./44/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 447
./strace-static-x86_64: Process 447 attached
[pid   447] set_robust_list(0x555589314660, 24) = 0
[pid   447] chdir("./45")               = 0
[pid   447] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   447] setpgid(0, 0)               = 0
[pid   447] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   447] write(3, "1000", 4)         = 4
[pid   447] close(3)                    = 0
[pid   447] symlink("/dev/binderfs", "./binderfs") = 0
[pid   447] write(1, "executing program\n", 18) = 18
[pid   447] memfd_create("syzkaller", 0) = 3
[pid   447] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   447] 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   447] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   447] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   447] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   447] close(3)                    = 0
[pid   447] close(4)                    = 0
[pid   447] mkdir("./file1", 0777)      = 0
[   34.367609][  T447] loop0: detected capacity change from 0 to 1024
[pid   447] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[   34.464845][  T447] EXT4-fs (loop0): Ignoring removed orlov option
[   34.472010][  T447] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   34.486004][  T447] 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. Quota mode: none.
[pid   447] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   447] chdir("./file1")            = 0
[pid   447] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   447] ioctl(4, LOOP_CLR_FD)       = 0
[pid   447] close(4)                    = 0
[pid   447] chdir("./file0")            = 0
[pid   447] creat("./bus", 000)         = 4
[pid   447] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   447] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   447] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   447] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   447] exit_group(0)               = ?
[pid   447] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=447, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x555589325770 /* 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, 0x55558931d730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./45/file1")                     = -1 EBUSY (Device or resource busy)
umount2("./45/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
rmdir("./45/file1")                     = 0
getdents64(3, 0x5555893156f0 /* 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=0x555589314650) = 451
./strace-static-x86_64: Process 451 attached
[pid   451] set_robust_list(0x555589314660, 24) = 0
[pid   451] chdir("./46")               = 0
[pid   451] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   451] setpgid(0, 0)               = 0
[pid   451] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   451] write(3, "1000", 4)         = 4
[pid   451] close(3)                    = 0
[pid   451] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   451] write(1, "executing program\n", 18) = 18
[pid   451] memfd_create("syzkaller", 0) = 3
[pid   451] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0c5a17d000
[pid   451] 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   451] munmap(0x7f0c5a17d000, 138412032) = 0
[pid   451] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   451] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid   451] close(3)                    = 0
[pid   451] close(4)                    = 0
[pid   451] mkdir("./file1", 0777)      = 0
[   34.652750][  T451] loop0: detected capacity change from 0 to 1024
[pid   451] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0
[pid   451] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid   451] chdir("./file1")            = 0
[pid   451] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   451] ioctl(4, LOOP_CLR_FD)       = 0
[pid   451] close(4)                    = 0
[pid   451] chdir("./file0")            = 0
[pid   451] creat("./bus", 000)         = 4
[pid   451] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0
[pid   451] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5
[pid   451] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000
[pid   451] readv(-1, 0x20001f80, 3)    = -1 EBADF (Bad file descriptor)
[pid   451] exit_group(0)               = ?
[pid   451] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=451, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
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, 0x5555893156f0 /* 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, 0x55558931d730 /* 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, 0x555589325770 /* 2 entries */, 32768) = 48
getdents64(5, 0x555589325770 /* 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)
[   34.724719][  T451] EXT4-fs (loop0): Ignoring removed orlov option
[   34.731255][  T451] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option
[   34.745876][  T451] 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. Quota mode: none.
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, 0x555589325770 /* 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, 0x555589325770 /* 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