./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor938892219
<...>
Warning: Permanently added '10.128.0.222' (ECDSA) to the list of known hosts.
execve("./syz-executor938892219", ["./syz-executor938892219"], 0x7ffe32b3d330 /* 10 vars */) = 0
brk(NULL) = 0x55555704b000
brk(0x55555704bc40) = 0x55555704bc40
arch_prctl(ARCH_SET_FS, 0x55555704b300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor938892219", 4096) = 27
brk(0x55555706cc40) = 0x55555706cc40
brk(0x55555706d000) = 0x55555706d000
mprotect(0x7fa8e7028000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
getpid() = 5068
mkdir("./syzkaller.FONpAp", 0700) = 0
chmod("./syzkaller.FONpAp", 0777) = 0
chdir("./syzkaller.FONpAp") = 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=0x55555704b5d0) = 5069
./strace-static-x86_64: Process 5069 attached
[pid 5069] chdir("./0") = 0
[pid 5069] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5069] setpgid(0, 0) = 0
[pid 5069] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5069] write(3, "1000", 4) = 4
[pid 5069] close(3) = 0
[pid 5069] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5069] memfd_create("syzkaller", 0) = 3
[pid 5069] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5069] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5069] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5069] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5069] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5069] close(3) = 0
[pid 5069] mkdir("./file0", 0777) = 0
[ 53.286198][ T5069] loop0: detected capacity change from 0 to 512
[ 53.288022][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 53.295698][ T5069] =======================================================
[ 53.295698][ T5069] WARNING: The mand mount option has been deprecated and
[ 53.295698][ T5069] and is ignored by this kernel. Remove the mand
[ 53.295698][ T5069] option from the mount to silence this warning.
[ 53.295698][ T5069] =======================================================
[ 53.338163][ T5069] EXT4-fs: Ignoring removed oldalloc option
[ 53.345607][ T5069] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 53.356893][ T5069] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 53.370940][ T5069] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5069] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5069] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5069] chdir("./file0") = 0
[pid 5069] ioctl(4, LOOP_CLR_FD) = 0
[pid 5069] close(4) = 0
[pid 5069] exit_group(0) = ?
[pid 5069] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5069, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} ---
umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./0/binderfs") = 0
umount2("./0/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./0/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./0/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./0/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./0/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./0") = 0
mkdir("./1", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5072
./strace-static-x86_64: Process 5072 attached
[pid 5072] chdir("./1") = 0
[pid 5072] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5072] setpgid(0, 0) = 0
[pid 5072] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5072] write(3, "1000", 4) = 4
[pid 5072] close(3) = 0
[pid 5072] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5072] memfd_create("syzkaller", 0) = 3
[pid 5072] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5072] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5072] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5072] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 53.381703][ T5069] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 53.405478][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5072] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5072] close(3) = 0
[pid 5072] mkdir("./file0", 0777) = 0
[ 53.448618][ T5072] loop0: detected capacity change from 0 to 512
[ 53.450304][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 53.458132][ T5072] EXT4-fs: Ignoring removed oldalloc option
[ 53.472908][ T5072] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 53.483354][ T5072] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 53.493304][ T5072] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5072] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5072] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5072] chdir("./file0") = 0
[pid 5072] ioctl(4, LOOP_CLR_FD) = 0
[pid 5072] close(4) = 0
[pid 5072] exit_group(0) = ?
[pid 5072] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5072, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./1/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./1/binderfs") = 0
umount2("./1/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./1/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./1/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./1/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./1/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5074
./strace-static-x86_64: Process 5074 attached
[pid 5074] chdir("./2") = 0
[pid 5074] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5074] setpgid(0, 0) = 0
[pid 5074] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5074] write(3, "1000", 4) = 4
[pid 5074] close(3) = 0
[pid 5074] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5074] memfd_create("syzkaller", 0) = 3
[pid 5074] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5074] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5074] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5074] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 53.499431][ T5072] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 53.522750][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5074] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5074] close(3) = 0
[pid 5074] mkdir("./file0", 0777) = 0
[ 53.577587][ T5074] loop0: detected capacity change from 0 to 512
[ 53.587781][ T5074] EXT4-fs: Ignoring removed oldalloc option
[ 53.595736][ T5074] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 53.606330][ T5074] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 53.616256][ T5074] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5074] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5074] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5074] chdir("./file0") = 0
[pid 5074] ioctl(4, LOOP_CLR_FD) = 0
[pid 5074] close(4) = 0
[pid 5074] exit_group(0) = ?
[pid 5074] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5074, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./2", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./2/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./2/binderfs") = 0
umount2("./2/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./2/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./2/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./2/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./2/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./2/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./2") = 0
mkdir("./3", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5076
./strace-static-x86_64: Process 5076 attached
[pid 5076] chdir("./3") = 0
[pid 5076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5076] setpgid(0, 0) = 0
[pid 5076] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5076] write(3, "1000", 4) = 4
[pid 5076] close(3) = 0
[pid 5076] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5076] memfd_create("syzkaller", 0) = 3
[pid 5076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5076] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5076] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5076] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 53.622631][ T5074] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 53.648557][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5076] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5076] close(3) = 0
[pid 5076] mkdir("./file0", 0777) = 0
[ 53.702707][ T5076] loop0: detected capacity change from 0 to 512
[ 53.711766][ T5076] EXT4-fs: Ignoring removed oldalloc option
[ 53.719143][ T5076] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 53.729818][ T5076] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 53.738707][ T5076] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5076] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5076] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5076] chdir("./file0") = 0
[pid 5076] ioctl(4, LOOP_CLR_FD) = 0
[pid 5076] close(4) = 0
[pid 5076] exit_group(0) = ?
[pid 5076] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5076, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./3", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./3/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./3/binderfs") = 0
umount2("./3/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./3/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./3/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./3/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./3/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./3/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5078
./strace-static-x86_64: Process 5078 attached
[pid 5078] chdir("./4") = 0
[pid 5078] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5078] setpgid(0, 0) = 0
[pid 5078] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5078] write(3, "1000", 4) = 4
[pid 5078] close(3) = 0
[pid 5078] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5078] memfd_create("syzkaller", 0) = 3
[pid 5078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5078] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5078] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 53.745786][ T5076] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 53.770208][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5078] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5078] close(3) = 0
[pid 5078] mkdir("./file0", 0777) = 0
[ 53.818523][ T5078] loop0: detected capacity change from 0 to 512
[ 53.827256][ T5078] EXT4-fs: Ignoring removed oldalloc option
[ 53.835087][ T5078] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 53.845693][ T5078] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 53.855221][ T5078] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5078] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5078] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5078] chdir("./file0") = 0
[pid 5078] ioctl(4, LOOP_CLR_FD) = 0
[pid 5078] close(4) = 0
[pid 5078] exit_group(0) = ?
[pid 5078] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5078, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./4", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./4/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./4/binderfs") = 0
umount2("./4/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./4/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./4/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./4/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./4/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./4/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5081
./strace-static-x86_64: Process 5081 attached
[pid 5081] chdir("./5") = 0
[pid 5081] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5081] setpgid(0, 0) = 0
[pid 5081] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5081] write(3, "1000", 4) = 4
[pid 5081] close(3) = 0
[pid 5081] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5081] memfd_create("syzkaller", 0) = 3
[pid 5081] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5081] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5081] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5081] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 53.862680][ T5078] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 53.896457][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5081] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5081] close(3) = 0
[pid 5081] mkdir("./file0", 0777) = 0
[ 53.947748][ T5081] loop0: detected capacity change from 0 to 512
[ 53.956328][ T5081] EXT4-fs: Ignoring removed oldalloc option
[ 53.963302][ T5081] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 53.973720][ T5081] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 53.982746][ T5081] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5081] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5081] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5081] chdir("./file0") = 0
[pid 5081] ioctl(4, LOOP_CLR_FD) = 0
[pid 5081] close(4) = 0
[pid 5081] exit_group(0) = ?
[pid 5081] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5081, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./5", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./5/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./5/binderfs") = 0
umount2("./5/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./5/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./5/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./5/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./5/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./5/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5083
./strace-static-x86_64: Process 5083 attached
[pid 5083] chdir("./6") = 0
[pid 5083] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5083] setpgid(0, 0) = 0
[pid 5083] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5083] write(3, "1000", 4) = 4
[pid 5083] close(3) = 0
[pid 5083] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5083] memfd_create("syzkaller", 0) = 3
[pid 5083] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5083] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5083] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5083] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 53.991422][ T5081] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.019801][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5083] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5083] close(3) = 0
[pid 5083] mkdir("./file0", 0777) = 0
[ 54.059720][ T5083] loop0: detected capacity change from 0 to 512
[ 54.070050][ T5083] EXT4-fs: Ignoring removed oldalloc option
[ 54.076833][ T5083] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.087177][ T5083] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.097183][ T5083] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5083] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5083] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5083] chdir("./file0") = 0
[pid 5083] ioctl(4, LOOP_CLR_FD) = 0
[pid 5083] close(4) = 0
[pid 5083] exit_group(0) = ?
[pid 5083] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5083, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./6", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./6/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./6/binderfs") = 0
umount2("./6/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./6/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./6/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./6/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./6/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./6/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5085
./strace-static-x86_64: Process 5085 attached
[pid 5085] chdir("./7") = 0
[pid 5085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5085] setpgid(0, 0) = 0
[pid 5085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5085] write(3, "1000", 4) = 4
[pid 5085] close(3) = 0
[pid 5085] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5085] memfd_create("syzkaller", 0) = 3
[pid 5085] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5085] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5085] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5085] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 54.111399][ T5083] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.139265][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5085] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5085] close(3) = 0
[pid 5085] mkdir("./file0", 0777) = 0
[ 54.179746][ T5085] loop0: detected capacity change from 0 to 512
[ 54.188896][ T5085] EXT4-fs: Ignoring removed oldalloc option
[ 54.196330][ T5085] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.207197][ T5085] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.216498][ T5085] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5085] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5085] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5085] chdir("./file0") = 0
[pid 5085] ioctl(4, LOOP_CLR_FD) = 0
[pid 5085] close(4) = 0
[pid 5085] exit_group(0) = ?
[pid 5085] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5085, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./7", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./7/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./7/binderfs") = 0
[ 54.222861][ T5085] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
umount2("./7/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./7/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./7/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./7/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./7/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./7/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5087
./strace-static-x86_64: Process 5087 attached
[pid 5087] chdir("./8") = 0
[pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5087] setpgid(0, 0) = 0
[pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5087] write(3, "1000", 4) = 4
[pid 5087] close(3) = 0
[pid 5087] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5087] memfd_create("syzkaller", 0) = 3
[pid 5087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5087] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5087] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5087] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 54.251588][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5087] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5087] close(3) = 0
[pid 5087] mkdir("./file0", 0777) = 0
[ 54.300268][ T5087] loop0: detected capacity change from 0 to 512
[ 54.309883][ T5087] EXT4-fs: Ignoring removed oldalloc option
[ 54.317068][ T5087] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.328085][ T5087] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.337655][ T5087] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5087] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5087] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5087] chdir("./file0") = 0
[pid 5087] ioctl(4, LOOP_CLR_FD) = 0
[pid 5087] close(4) = 0
[pid 5087] exit_group(0) = ?
[pid 5087] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5087, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./8", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./8/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./8/binderfs") = 0
umount2("./8/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./8/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./8/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./8/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./8/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./8/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5089
./strace-static-x86_64: Process 5089 attached
[pid 5089] chdir("./9") = 0
[pid 5089] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5089] setpgid(0, 0) = 0
[pid 5089] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5089] write(3, "1000", 4) = 4
[pid 5089] close(3) = 0
[pid 5089] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5089] memfd_create("syzkaller", 0) = 3
[pid 5089] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 54.343928][ T5087] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.365778][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5089] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5089] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5089] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5089] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5089] close(3) = 0
[pid 5089] mkdir("./file0", 0777) = 0
[ 54.416554][ T5089] loop0: detected capacity change from 0 to 512
[ 54.421462][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 54.426580][ T5089] EXT4-fs: Ignoring removed oldalloc option
[ 54.440037][ T5089] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.450475][ T5089] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.459598][ T5089] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5089] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5089] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5089] chdir("./file0") = 0
[pid 5089] ioctl(4, LOOP_CLR_FD) = 0
[pid 5089] close(4) = 0
[pid 5089] exit_group(0) = ?
[pid 5089] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5089, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./9", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./9", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./9/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./9/binderfs") = 0
umount2("./9/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./9/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./9/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./9/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./9/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./9/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5091
./strace-static-x86_64: Process 5091 attached
[pid 5091] chdir("./10") = 0
[pid 5091] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5091] setpgid(0, 0) = 0
[pid 5091] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5091] write(3, "1000", 4) = 4
[pid 5091] close(3) = 0
[pid 5091] symlink("/dev/binderfs", "./binderfs") = 0
[ 54.466541][ T5089] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.502523][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5091] memfd_create("syzkaller", 0) = 3
[pid 5091] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5091] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5091] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5091] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5091] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5091] close(3) = 0
[pid 5091] mkdir("./file0", 0777) = 0
[ 54.556066][ T5091] loop0: detected capacity change from 0 to 512
[ 54.565115][ T5091] EXT4-fs: Ignoring removed oldalloc option
[ 54.572085][ T5091] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.582819][ T5091] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.592941][ T5091] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5091] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5091] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5091] chdir("./file0") = 0
[pid 5091] ioctl(4, LOOP_CLR_FD) = 0
[pid 5091] close(4) = 0
[pid 5091] exit_group(0) = ?
[pid 5091] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5091, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./10", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./10", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./10/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./10/binderfs") = 0
umount2("./10/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./10/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./10/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./10/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./10/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./10/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5093
./strace-static-x86_64: Process 5093 attached
[pid 5093] chdir("./11") = 0
[pid 5093] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5093] setpgid(0, 0) = 0
[pid 5093] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5093] write(3, "1000", 4) = 4
[pid 5093] close(3) = 0
[pid 5093] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5093] memfd_create("syzkaller", 0) = 3
[pid 5093] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5093] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5093] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5093] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 54.600201][ T5091] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.622685][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5093] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5093] close(3) = 0
[pid 5093] mkdir("./file0", 0777) = 0
[ 54.659594][ T5093] loop0: detected capacity change from 0 to 512
[ 54.666735][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 54.670676][ T5093] EXT4-fs: Ignoring removed oldalloc option
[ 54.683763][ T5093] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.694367][ T5093] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.704466][ T5093] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5093] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5093] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5093] chdir("./file0") = 0
[pid 5093] ioctl(4, LOOP_CLR_FD) = 0
[pid 5093] close(4) = 0
[pid 5093] exit_group(0) = ?
[pid 5093] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5093, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./11", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./11/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./11/binderfs") = 0
umount2("./11/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./11/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./11/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./11/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./11/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./11/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5095
./strace-static-x86_64: Process 5095 attached
[pid 5095] chdir("./12") = 0
[pid 5095] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5095] setpgid(0, 0) = 0
[pid 5095] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5095] write(3, "1000", 4) = 4
[pid 5095] close(3) = 0
[pid 5095] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5095] memfd_create("syzkaller", 0) = 3
[pid 5095] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5095] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5095] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5095] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 54.710778][ T5093] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.737684][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5095] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5095] close(3) = 0
[pid 5095] mkdir("./file0", 0777) = 0
[ 54.787314][ T5095] loop0: detected capacity change from 0 to 512
[ 54.796133][ T5095] EXT4-fs: Ignoring removed oldalloc option
[ 54.803237][ T5095] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.813988][ T5095] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.823509][ T5095] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5095] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5095] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5095] chdir("./file0") = 0
[pid 5095] ioctl(4, LOOP_CLR_FD) = 0
[pid 5095] close(4) = 0
[pid 5095] exit_group(0) = ?
[pid 5095] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5095, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./12/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./12/binderfs") = 0
umount2("./12/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./12/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./12/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./12/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./12/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./12/file0") = 0
getdents64(3, 0x55555704c620 /* 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) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5097
./strace-static-x86_64: Process 5097 attached
[pid 5097] chdir("./13") = 0
[pid 5097] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5097] setpgid(0, 0) = 0
[pid 5097] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5097] write(3, "1000", 4) = 4
[pid 5097] close(3) = 0
[pid 5097] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5097] memfd_create("syzkaller", 0) = 3
[pid 5097] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 54.830045][ T5095] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.851034][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5097] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5097] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5097] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5097] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5097] close(3) = 0
[pid 5097] mkdir("./file0", 0777) = 0
[ 54.886061][ T5097] loop0: detected capacity change from 0 to 512
[ 54.895268][ T5097] EXT4-fs: Ignoring removed oldalloc option
[ 54.903867][ T5097] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 54.914453][ T5097] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 54.924302][ T5097] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5097] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5097] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5097] chdir("./file0") = 0
[pid 5097] ioctl(4, LOOP_CLR_FD) = 0
[pid 5097] close(4) = 0
[pid 5097] exit_group(0) = ?
[pid 5097] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5097, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./13", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./13/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./13/binderfs") = 0
umount2("./13/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./13/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./13/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./13/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./13/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./13/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5099
./strace-static-x86_64: Process 5099 attached
[pid 5099] chdir("./14") = 0
[pid 5099] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5099] setpgid(0, 0) = 0
[pid 5099] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5099] write(3, "1000", 4) = 4
[pid 5099] close(3) = 0
[pid 5099] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5099] memfd_create("syzkaller", 0) = 3
[pid 5099] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5099] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5099] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5099] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 54.932913][ T5097] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 54.955676][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5099] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5099] close(3) = 0
[pid 5099] mkdir("./file0", 0777) = 0
[ 55.009908][ T5099] loop0: detected capacity change from 0 to 512
[ 55.029249][ T5099] EXT4-fs: Ignoring removed oldalloc option
[ 55.036547][ T5099] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.047265][ T5099] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5099] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5099] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5099] chdir("./file0") = 0
[pid 5099] ioctl(4, LOOP_CLR_FD) = 0
[pid 5099] close(4) = 0
[pid 5099] exit_group(0) = ?
[pid 5099] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5099, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./14", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./14/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./14/binderfs") = 0
umount2("./14/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./14/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./14/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./14/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./14/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./14/file0") = 0
getdents64(3, 0x55555704c620 /* 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) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5101
./strace-static-x86_64: Process 5101 attached
[pid 5101] chdir("./15") = 0
[pid 5101] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5101] setpgid(0, 0) = 0
[pid 5101] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5101] write(3, "1000", 4) = 4
[pid 5101] close(3) = 0
[pid 5101] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5101] memfd_create("syzkaller", 0) = 3
[pid 5101] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5101] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5101] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5101] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.056487][ T5099] EXT4-fs (loop0): 1 truncate cleaned up
[ 55.063558][ T5099] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 55.089342][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5101] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5101] close(3) = 0
[pid 5101] mkdir("./file0", 0777) = 0
[ 55.124679][ T5101] loop0: detected capacity change from 0 to 512
[ 55.127551][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 55.133754][ T5101] EXT4-fs: Ignoring removed oldalloc option
[ 55.152952][ T5101] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.164614][ T5101] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5101] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5101] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5101] chdir("./file0") = 0
[pid 5101] ioctl(4, LOOP_CLR_FD) = 0
[pid 5101] close(4) = 0
[pid 5101] exit_group(0) = ?
[pid 5101] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5101, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
umount2("./15", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./15/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./15/binderfs") = 0
umount2("./15/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./15/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./15/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./15/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./15/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./15/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5103
./strace-static-x86_64: Process 5103 attached
[pid 5103] chdir("./16") = 0
[pid 5103] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5103] setpgid(0, 0) = 0
[pid 5103] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5103] write(3, "1000", 4) = 4
[pid 5103] close(3) = 0
[pid 5103] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5103] memfd_create("syzkaller", 0) = 3
[pid 5103] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5103] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5103] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5103] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.175671][ T5101] EXT4-fs (loop0): 1 truncate cleaned up
[ 55.185872][ T5101] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 55.207890][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5103] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5103] close(3) = 0
[pid 5103] mkdir("./file0", 0777) = 0
[ 55.244604][ T5103] loop0: detected capacity change from 0 to 512
[ 55.255140][ T5103] EXT4-fs: Ignoring removed oldalloc option
[ 55.262133][ T5103] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.273325][ T5103] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 55.283221][ T5103] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5103] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5103] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5103] chdir("./file0") = 0
[pid 5103] ioctl(4, LOOP_CLR_FD) = 0
[pid 5103] close(4) = 0
[pid 5103] exit_group(0) = ?
[pid 5103] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5103, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./16/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./16/binderfs") = 0
umount2("./16/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./16/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./16/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./16/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./16/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./16/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5105
./strace-static-x86_64: Process 5105 attached
[pid 5105] chdir("./17") = 0
[pid 5105] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5105] setpgid(0, 0) = 0
[pid 5105] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5105] write(3, "1000", 4) = 4
[pid 5105] close(3) = 0
[pid 5105] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5105] memfd_create("syzkaller", 0) = 3
[pid 5105] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5105] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5105] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5105] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.289224][ T5103] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 55.320590][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5105] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5105] close(3) = 0
[pid 5105] mkdir("./file0", 0777) = 0
[ 55.357762][ T5105] loop0: detected capacity change from 0 to 512
[ 55.366565][ T5105] EXT4-fs: Ignoring removed oldalloc option
[ 55.373671][ T5105] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.384275][ T5105] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 55.393251][ T5105] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5105] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5105] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5105] chdir("./file0") = 0
[pid 5105] ioctl(4, LOOP_CLR_FD) = 0
[pid 5105] close(4) = 0
[pid 5105] exit_group(0) = ?
[pid 5105] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5105, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./17", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./17/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./17/binderfs") = 0
[ 55.401216][ T5105] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
umount2("./17/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./17/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./17/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./17/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./17/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./17/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5107
./strace-static-x86_64: Process 5107 attached
[pid 5107] chdir("./18") = 0
[pid 5107] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5107] setpgid(0, 0) = 0
[pid 5107] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5107] write(3, "1000", 4) = 4
[pid 5107] close(3) = 0
[pid 5107] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5107] memfd_create("syzkaller", 0) = 3
[pid 5107] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5107] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5107] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5107] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.431433][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5107] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5107] close(3) = 0
[pid 5107] mkdir("./file0", 0777) = 0
[ 55.487441][ T5107] loop0: detected capacity change from 0 to 512
[ 55.497402][ T5107] EXT4-fs: Ignoring removed oldalloc option
[ 55.505195][ T5107] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.515918][ T5107] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 55.524770][ T5107] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5107] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5107] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5107] chdir("./file0") = 0
[pid 5107] ioctl(4, LOOP_CLR_FD) = 0
[pid 5107] close(4) = 0
[pid 5107] exit_group(0) = ?
[pid 5107] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5107, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./18", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./18", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./18/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./18/binderfs") = 0
umount2("./18/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./18/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./18/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./18/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./18/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./18/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./18") = 0
mkdir("./19", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5109
./strace-static-x86_64: Process 5109 attached
[pid 5109] chdir("./19") = 0
[pid 5109] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5109] setpgid(0, 0) = 0
[pid 5109] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5109] write(3, "1000", 4) = 4
[pid 5109] close(3) = 0
[pid 5109] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5109] memfd_create("syzkaller", 0) = 3
[pid 5109] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5109] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5109] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5109] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.531322][ T5107] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 55.559288][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5109] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5109] close(3) = 0
[pid 5109] mkdir("./file0", 0777) = 0
[ 55.606207][ T5109] loop0: detected capacity change from 0 to 512
[ 55.615218][ T5109] EXT4-fs: Ignoring removed oldalloc option
[ 55.622154][ T5109] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.633041][ T5109] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 55.642374][ T5109] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5109] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5109] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5109] chdir("./file0") = 0
[pid 5109] ioctl(4, LOOP_CLR_FD) = 0
[pid 5109] close(4) = 0
[pid 5109] exit_group(0) = ?
[pid 5109] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5109, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./19/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./19/binderfs") = 0
umount2("./19/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./19/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./19/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./19/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./19/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./19/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5111
./strace-static-x86_64: Process 5111 attached
[pid 5111] chdir("./20") = 0
[pid 5111] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5111] setpgid(0, 0) = 0
[pid 5111] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5111] write(3, "1000", 4) = 4
[pid 5111] close(3) = 0
[pid 5111] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5111] memfd_create("syzkaller", 0) = 3
[pid 5111] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5111] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5111] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5111] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.648993][ T5109] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 55.675995][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5111] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5111] close(3) = 0
[pid 5111] mkdir("./file0", 0777) = 0
[ 55.729727][ T5111] loop0: detected capacity change from 0 to 512
[ 55.739070][ T5111] EXT4-fs: Ignoring removed oldalloc option
[ 55.746216][ T5111] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.756757][ T5111] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 55.766204][ T5111] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5111] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5111] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5111] chdir("./file0") = 0
[pid 5111] ioctl(4, LOOP_CLR_FD) = 0
[pid 5111] close(4) = 0
[pid 5111] exit_group(0) = ?
[pid 5111] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5111, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./20", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./20/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./20/binderfs") = 0
umount2("./20/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./20/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./20/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./20/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./20/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./20/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5113
./strace-static-x86_64: Process 5113 attached
[pid 5113] chdir("./21") = 0
[pid 5113] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5113] setpgid(0, 0) = 0
[pid 5113] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5113] write(3, "1000", 4) = 4
[pid 5113] close(3) = 0
[pid 5113] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5113] memfd_create("syzkaller", 0) = 3
[pid 5113] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5113] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5113] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5113] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 55.773478][ T5111] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 55.803205][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5113] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5113] close(3) = 0
[pid 5113] mkdir("./file0", 0777) = 0
[ 55.856482][ T5113] loop0: detected capacity change from 0 to 512
[ 55.865846][ T5113] EXT4-fs: Ignoring removed oldalloc option
[ 55.872403][ T5113] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 55.882914][ T5113] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 55.892434][ T5113] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5113] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5113] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5113] chdir("./file0") = 0
[pid 5113] ioctl(4, LOOP_CLR_FD) = 0
[pid 5113] close(4) = 0
[pid 5113] exit_group(0) = ?
[pid 5113] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5113, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./21", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./21/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./21/binderfs") = 0
[ 55.898441][ T5113] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
umount2("./21/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./21/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./21/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./21/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./21/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./21/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5115
./strace-static-x86_64: Process 5115 attached
[pid 5115] chdir("./22") = 0
[pid 5115] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5115] setpgid(0, 0) = 0
[pid 5115] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5115] write(3, "1000", 4) = 4
[pid 5115] close(3) = 0
[pid 5115] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5115] memfd_create("syzkaller", 0) = 3
[pid 5115] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5115] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5115] munmap(0x7fa8deb6c000, 262144) = 0
[ 55.928917][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5115] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5115] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5115] close(3) = 0
[pid 5115] mkdir("./file0", 0777) = 0
[ 55.975340][ T5115] loop0: detected capacity change from 0 to 512
[ 55.984795][ T5115] EXT4-fs: Ignoring removed oldalloc option
[ 55.992498][ T5115] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.003361][ T5115] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.012907][ T5115] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5115] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5115] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5115] chdir("./file0") = 0
[pid 5115] ioctl(4, LOOP_CLR_FD) = 0
[pid 5115] close(4) = 0
[pid 5115] exit_group(0) = ?
[pid 5115] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5115, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./22/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./22/binderfs") = 0
umount2("./22/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./22/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./22/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./22/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./22/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./22/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5117
./strace-static-x86_64: Process 5117 attached
[pid 5117] chdir("./23") = 0
[pid 5117] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5117] setpgid(0, 0) = 0
[pid 5117] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5117] write(3, "1000", 4) = 4
[pid 5117] close(3) = 0
[pid 5117] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5117] memfd_create("syzkaller", 0) = 3
[pid 5117] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5117] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5117] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5117] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 56.018943][ T5115] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.042598][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5117] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5117] close(3) = 0
[pid 5117] mkdir("./file0", 0777) = 0
[ 56.096656][ T5117] loop0: detected capacity change from 0 to 512
[ 56.106874][ T5117] EXT4-fs: Ignoring removed oldalloc option
[ 56.113773][ T5117] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.124064][ T5117] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.133693][ T5117] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5117] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5117] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5117] chdir("./file0") = 0
[pid 5117] ioctl(4, LOOP_CLR_FD) = 0
[pid 5117] close(4) = 0
[pid 5117] exit_group(0) = ?
[pid 5117] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5117, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./23", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./23/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./23/binderfs") = 0
umount2("./23/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./23/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./23/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./23/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./23/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./23/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5119
./strace-static-x86_64: Process 5119 attached
[pid 5119] chdir("./24") = 0
[pid 5119] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5119] setpgid(0, 0) = 0
[pid 5119] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5119] write(3, "1000", 4) = 4
[pid 5119] close(3) = 0
[pid 5119] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5119] memfd_create("syzkaller", 0) = 3
[pid 5119] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5119] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5119] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5119] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 56.139760][ T5117] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.165913][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5119] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5119] close(3) = 0
[pid 5119] mkdir("./file0", 0777) = 0
[ 56.215175][ T5119] loop0: detected capacity change from 0 to 512
[ 56.223683][ T5119] EXT4-fs: Ignoring removed oldalloc option
[ 56.230355][ T5119] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.240768][ T5119] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.250189][ T5119] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5119] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5119] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5119] chdir("./file0") = 0
[pid 5119] ioctl(4, LOOP_CLR_FD) = 0
[pid 5119] close(4) = 0
[pid 5119] exit_group(0) = ?
[pid 5119] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5119, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./24", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./24/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./24/binderfs") = 0
umount2("./24/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./24/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./24/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./24/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./24/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./24/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5121
./strace-static-x86_64: Process 5121 attached
[pid 5121] chdir("./25") = 0
[pid 5121] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5121] setpgid(0, 0) = 0
[pid 5121] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5121] write(3, "1000", 4) = 4
[ 56.256944][ T5119] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.281039][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5121] close(3) = 0
[pid 5121] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5121] memfd_create("syzkaller", 0) = 3
[pid 5121] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5121] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5121] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5121] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5121] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5121] close(3) = 0
[pid 5121] mkdir("./file0", 0777) = 0
[ 56.336537][ T5121] loop0: detected capacity change from 0 to 512
[ 56.345374][ T5121] EXT4-fs: Ignoring removed oldalloc option
[ 56.352260][ T5121] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.362997][ T5121] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.372237][ T5121] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5121] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5121] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5121] chdir("./file0") = 0
[pid 5121] ioctl(4, LOOP_CLR_FD) = 0
[pid 5121] close(4) = 0
[pid 5121] exit_group(0) = ?
[pid 5121] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5121, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./25", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./25", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./25/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./25/binderfs") = 0
umount2("./25/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./25/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./25/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./25/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./25/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./25/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5123
./strace-static-x86_64: Process 5123 attached
[pid 5123] chdir("./26") = 0
[pid 5123] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5123] setpgid(0, 0) = 0
[pid 5123] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5123] write(3, "1000", 4) = 4
[pid 5123] close(3) = 0
[pid 5123] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5123] memfd_create("syzkaller", 0) = 3
[pid 5123] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5123] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 56.378382][ T5121] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.401552][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5123] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5123] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5123] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5123] close(3) = 0
[pid 5123] mkdir("./file0", 0777) = 0
[ 56.449934][ T5123] loop0: detected capacity change from 0 to 512
[ 56.459062][ T5123] EXT4-fs: Ignoring removed oldalloc option
[ 56.466145][ T5123] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.476885][ T5123] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.485991][ T5123] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5123] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5123] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5123] chdir("./file0") = 0
[pid 5123] ioctl(4, LOOP_CLR_FD) = 0
[pid 5123] close(4) = 0
[pid 5123] exit_group(0) = ?
[pid 5123] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5123, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
umount2("./26", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./26/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./26/binderfs") = 0
umount2("./26/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./26/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./26/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./26/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./26/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./26/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./26") = 0
mkdir("./27", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5125 attached
, child_tidptr=0x55555704b5d0) = 5125
[pid 5125] chdir("./27") = 0
[pid 5125] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5125] setpgid(0, 0) = 0
[pid 5125] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5125] write(3, "1000", 4) = 4
[pid 5125] close(3) = 0
[pid 5125] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5125] memfd_create("syzkaller", 0) = 3
[pid 5125] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5125] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5125] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5125] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 56.492309][ T5123] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.516861][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5125] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5125] close(3) = 0
[pid 5125] mkdir("./file0", 0777) = 0
[ 56.560466][ T5125] loop0: detected capacity change from 0 to 512
[ 56.567755][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 56.572942][ T5125] EXT4-fs: Ignoring removed oldalloc option
[ 56.586569][ T5125] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.597494][ T5125] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5125] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5125] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5125] chdir("./file0") = 0
[pid 5125] ioctl(4, LOOP_CLR_FD) = 0
[pid 5125] close(4) = 0
[pid 5125] exit_group(0) = ?
[pid 5125] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5125, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./27", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./27/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./27/binderfs") = 0
umount2("./27/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./27/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./27/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./27/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./27/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./27/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./27") = 0
mkdir("./28", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
[ 56.607725][ T5125] EXT4-fs (loop0): 1 truncate cleaned up
[ 56.614276][ T5125] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.643244][ T5125] syz-executor938 (5125) used greatest stack depth: 16064 bytes left
[ 56.643447][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5127
./strace-static-x86_64: Process 5127 attached
[pid 5127] chdir("./28") = 0
[pid 5127] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5127] setpgid(0, 0) = 0
[pid 5127] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5127] write(3, "1000", 4) = 4
[pid 5127] close(3) = 0
[pid 5127] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5127] memfd_create("syzkaller", 0) = 3
[pid 5127] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5127] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5127] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5127] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5127] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5127] close(3) = 0
[pid 5127] mkdir("./file0", 0777) = 0
[ 56.700398][ T5127] loop0: detected capacity change from 0 to 512
[ 56.709363][ T5127] EXT4-fs: Ignoring removed oldalloc option
[ 56.716186][ T5127] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.726703][ T5127] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.735847][ T5127] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5127] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5127] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5127] chdir("./file0") = 0
[pid 5127] ioctl(4, LOOP_CLR_FD) = 0
[pid 5127] close(4) = 0
[pid 5127] exit_group(0) = ?
[pid 5127] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5127, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./28", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./28/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./28/binderfs") = 0
umount2("./28/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./28/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./28/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./28/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./28/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./28/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./28") = 0
mkdir("./29", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5129
./strace-static-x86_64: Process 5129 attached
[pid 5129] chdir("./29") = 0
[pid 5129] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5129] setpgid(0, 0) = 0
[pid 5129] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5129] write(3, "1000", 4) = 4
[pid 5129] close(3) = 0
[pid 5129] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5129] memfd_create("syzkaller", 0) = 3
[pid 5129] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5129] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5129] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5129] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 56.742872][ T5127] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 56.777714][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5129] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5129] close(3) = 0
[pid 5129] mkdir("./file0", 0777) = 0
[ 56.827769][ T5129] loop0: detected capacity change from 0 to 512
[ 56.837076][ T5129] EXT4-fs: Ignoring removed oldalloc option
[ 56.844812][ T5129] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.854985][ T5129] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.863807][ T5129] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5129] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5129] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5129] chdir("./file0") = 0
[pid 5129] ioctl(4, LOOP_CLR_FD) = 0
[pid 5129] close(4) = 0
[pid 5129] exit_group(0) = ?
[pid 5129] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5129, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./29", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./29/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./29/binderfs") = 0
[ 56.871087][ T5129] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
umount2("./29/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./29/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./29/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./29/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./29/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./29/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./29") = 0
mkdir("./30", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5131
./strace-static-x86_64: Process 5131 attached
[pid 5131] chdir("./30") = 0
[pid 5131] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5131] setpgid(0, 0) = 0
[pid 5131] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5131] write(3, "1000", 4) = 4
[pid 5131] close(3) = 0
[pid 5131] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5131] memfd_create("syzkaller", 0) = 3
[pid 5131] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5131] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5131] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5131] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 56.899601][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5131] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5131] close(3) = 0
[pid 5131] mkdir("./file0", 0777) = 0
[ 56.952980][ T5131] loop0: detected capacity change from 0 to 512
[ 56.964389][ T5131] EXT4-fs: Ignoring removed oldalloc option
[ 56.971298][ T5131] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 56.982165][ T5131] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 56.990975][ T5131] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5131] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5131] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5131] chdir("./file0") = 0
[pid 5131] ioctl(4, LOOP_CLR_FD) = 0
[pid 5131] close(4) = 0
[pid 5131] exit_group(0) = ?
[pid 5131] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5131, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./30/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./30/binderfs") = 0
umount2("./30/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./30/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./30/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./30/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./30/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./30/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5133
./strace-static-x86_64: Process 5133 attached
[pid 5133] chdir("./31") = 0
[pid 5133] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5133] setpgid(0, 0) = 0
[pid 5133] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5133] write(3, "1000", 4) = 4
[pid 5133] close(3) = 0
[pid 5133] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5133] memfd_create("syzkaller", 0) = 3
[pid 5133] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5133] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5133] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5133] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 56.997377][ T5131] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
[ 57.032037][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5133] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5133] close(3) = 0
[pid 5133] mkdir("./file0", 0777) = 0
[ 57.084126][ T5133] loop0: detected capacity change from 0 to 512
[ 57.092939][ T5133] EXT4-fs: Ignoring removed oldalloc option
[ 57.100045][ T5133] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.110659][ T5133] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.120121][ T5133] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5133] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5133] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5133] chdir("./file0") = 0
[pid 5133] ioctl(4, LOOP_CLR_FD) = 0
[pid 5133] close(4) = 0
[pid 5133] exit_group(0) = ?
[pid 5133] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5133, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./31/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./31/binderfs") = 0
[ 57.126577][ T5133] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
umount2("./31/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./31/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./31/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./31/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./31/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./31/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./31") = 0
mkdir("./32", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5135
./strace-static-x86_64: Process 5135 attached
[pid 5135] chdir("./32") = 0
[pid 5135] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5135] setpgid(0, 0) = 0
[pid 5135] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5135] write(3, "1000", 4) = 4
[pid 5135] close(3) = 0
[pid 5135] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5135] memfd_create("syzkaller", 0) = 3
[pid 5135] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5135] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5135] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5135] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 57.155594][ T5068] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
[pid 5135] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5135] close(3) = 0
[pid 5135] mkdir("./file0", 0777) = 0
[pid 5135] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5135] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5135] chdir("./file0") = 0
[pid 5135] ioctl(4, LOOP_CLR_FD) = 0
[pid 5135] close(4) = 0
[pid 5135] exit_group(0) = ?
[pid 5135] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5135, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./32", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./32/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./32/binderfs") = 0
umount2("./32/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./32/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./32/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./32/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./32/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./32/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./32") = 0
[ 57.211585][ T5135] loop0: detected capacity change from 0 to 512
[ 57.220223][ T5135] EXT4-fs: Ignoring removed oldalloc option
[ 57.226953][ T5135] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.237741][ T5135] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.247105][ T5135] EXT4-fs (loop0): 1 truncate cleaned up
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=0x55555704b5d0) = 5137
./strace-static-x86_64: Process 5137 attached
[pid 5137] chdir("./33") = 0
[pid 5137] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5137] setpgid(0, 0) = 0
[pid 5137] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5137] write(3, "1000", 4) = 4
[pid 5137] close(3) = 0
[pid 5137] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5137] memfd_create("syzkaller", 0) = 3
[pid 5137] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5137] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5137] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5137] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5137] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5137] close(3) = 0
[pid 5137] mkdir("./file0", 0777) = 0
[pid 5137] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5137] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5137] chdir("./file0") = 0
[pid 5137] ioctl(4, LOOP_CLR_FD) = 0
[pid 5137] close(4) = 0
[pid 5137] exit_group(0) = ?
[pid 5137] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5137, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./33", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./33/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./33/binderfs") = 0
umount2("./33/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./33/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./33/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./33/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./33/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./33/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5139
./strace-static-x86_64: Process 5139 attached
[pid 5139] chdir("./34") = 0
[pid 5139] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5139] setpgid(0, 0) = 0
[pid 5139] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5139] write(3, "1000", 4) = 4
[pid 5139] close(3) = 0
[pid 5139] symlink("/dev/binderfs", "./binderfs") = 0
[ 57.334593][ T5137] loop0: detected capacity change from 0 to 512
[ 57.343323][ T5137] EXT4-fs: Ignoring removed oldalloc option
[ 57.350281][ T5137] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.361252][ T5137] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.369997][ T5137] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5139] memfd_create("syzkaller", 0) = 3
[pid 5139] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5139] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5139] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5139] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5139] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5139] close(3) = 0
[pid 5139] mkdir("./file0", 0777) = 0
[pid 5139] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5139] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5139] chdir("./file0") = 0
[pid 5139] ioctl(4, LOOP_CLR_FD) = 0
[pid 5139] close(4) = 0
[pid 5139] exit_group(0) = ?
[pid 5139] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5139, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./34", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./34/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./34/binderfs") = 0
umount2("./34/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./34/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./34/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./34/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./34/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./34/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
[ 57.424723][ T5139] loop0: detected capacity change from 0 to 512
[ 57.434149][ T5139] EXT4-fs: Ignoring removed oldalloc option
[ 57.442539][ T5139] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.452660][ T5139] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.462399][ T5139] EXT4-fs (loop0): 1 truncate cleaned up
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=0x55555704b5d0) = 5141
./strace-static-x86_64: Process 5141 attached
[pid 5141] chdir("./35") = 0
[pid 5141] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5141] setpgid(0, 0) = 0
[pid 5141] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5141] write(3, "1000", 4) = 4
[pid 5141] close(3) = 0
[pid 5141] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5141] memfd_create("syzkaller", 0) = 3
[pid 5141] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5141] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5141] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5141] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5141] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5141] close(3) = 0
[pid 5141] mkdir("./file0", 0777) = 0
[pid 5141] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5141] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5141] chdir("./file0") = 0
[pid 5141] ioctl(4, LOOP_CLR_FD) = 0
[pid 5141] close(4) = 0
[pid 5141] exit_group(0) = ?
[pid 5141] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5141, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./35", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./35/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./35/binderfs") = 0
umount2("./35/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./35/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./35/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./35/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./35/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
[ 57.544167][ T5141] loop0: detected capacity change from 0 to 512
[ 57.552997][ T5141] EXT4-fs: Ignoring removed oldalloc option
[ 57.559788][ T5141] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.570549][ T5141] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.579745][ T5141] EXT4-fs (loop0): 1 truncate cleaned up
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./35/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5143
./strace-static-x86_64: Process 5143 attached
[pid 5143] chdir("./36") = 0
[pid 5143] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5143] setpgid(0, 0) = 0
[pid 5143] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5143] write(3, "1000", 4) = 4
[pid 5143] close(3) = 0
[pid 5143] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5143] memfd_create("syzkaller", 0) = 3
[pid 5143] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5143] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5143] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5143] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5143] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5143] close(3) = 0
[pid 5143] mkdir("./file0", 0777) = 0
[pid 5143] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5143] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5143] chdir("./file0") = 0
[pid 5143] ioctl(4, LOOP_CLR_FD) = 0
[pid 5143] close(4) = 0
[pid 5143] exit_group(0) = ?
[pid 5143] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5143, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./36", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./36/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./36/binderfs") = 0
umount2("./36/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./36/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./36/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./36/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./36/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./36/file0") = 0
getdents64(3, 0x55555704c620 /* 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) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5145
./strace-static-x86_64: Process 5145 attached
[pid 5145] chdir("./37") = 0
[pid 5145] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5145] setpgid(0, 0) = 0
[pid 5145] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5145] write(3, "1000", 4) = 4
[pid 5145] close(3) = 0
[pid 5145] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5145] memfd_create("syzkaller", 0) = 3
[pid 5145] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5145] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5145] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5145] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 57.647126][ T5143] loop0: detected capacity change from 0 to 512
[ 57.656172][ T5143] EXT4-fs: Ignoring removed oldalloc option
[ 57.663245][ T5143] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.673957][ T5143] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.682802][ T5143] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5145] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5145] close(3) = 0
[pid 5145] mkdir("./file0", 0777) = 0
[pid 5145] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5145] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5145] chdir("./file0") = 0
[pid 5145] ioctl(4, LOOP_CLR_FD) = 0
[pid 5145] close(4) = 0
[pid 5145] exit_group(0) = ?
[pid 5145] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5145, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./37", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./37/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./37/binderfs") = 0
umount2("./37/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./37/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./37/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./37/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./37/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
[ 57.728075][ T5145] loop0: detected capacity change from 0 to 512
[ 57.737794][ T5145] EXT4-fs: Ignoring removed oldalloc option
[ 57.745370][ T5145] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.755988][ T5145] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.764503][ T5145] EXT4-fs (loop0): 1 truncate cleaned up
rmdir("./37/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5147
./strace-static-x86_64: Process 5147 attached
[pid 5147] chdir("./38") = 0
[pid 5147] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5147] setpgid(0, 0) = 0
[pid 5147] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5147] write(3, "1000", 4) = 4
[pid 5147] close(3) = 0
[pid 5147] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5147] memfd_create("syzkaller", 0) = 3
[pid 5147] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5147] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5147] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5147] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5147] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5147] close(3) = 0
[pid 5147] mkdir("./file0", 0777) = 0
[pid 5147] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5147] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5147] chdir("./file0") = 0
[pid 5147] ioctl(4, LOOP_CLR_FD) = 0
[pid 5147] close(4) = 0
[pid 5147] exit_group(0) = ?
[pid 5147] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5147, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./38", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./38", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./38/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./38/binderfs") = 0
umount2("./38/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./38/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./38/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./38/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./38/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./38/file0") = 0
getdents64(3, 0x55555704c620 /* 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) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5149
./strace-static-x86_64: Process 5149 attached
[pid 5149] chdir("./39") = 0
[pid 5149] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5149] setpgid(0, 0) = 0
[ 57.837584][ T5147] loop0: detected capacity change from 0 to 512
[ 57.846823][ T5147] EXT4-fs: Ignoring removed oldalloc option
[ 57.853832][ T5147] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.864239][ T5147] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 57.873370][ T5147] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5149] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5149] write(3, "1000", 4) = 4
[pid 5149] close(3) = 0
[pid 5149] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5149] memfd_create("syzkaller", 0) = 3
[pid 5149] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5149] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5149] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5149] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5149] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5149] close(3) = 0
[pid 5149] mkdir("./file0", 0777) = 0
[ 57.925291][ T5149] loop0: detected capacity change from 0 to 512
[ 57.930590][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 57.934860][ T5149] EXT4-fs: Ignoring removed oldalloc option
[ 57.955968][ T5149] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 57.966788][ T5149] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5149] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5149] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5149] chdir("./file0") = 0
[pid 5149] ioctl(4, LOOP_CLR_FD) = 0
[pid 5149] close(4) = 0
[pid 5149] exit_group(0) = ?
[pid 5149] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5149, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./39", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./39", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./39/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./39/binderfs") = 0
umount2("./39/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./39/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./39/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./39/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./39/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./39/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5151
./strace-static-x86_64: Process 5151 attached
[pid 5151] chdir("./40") = 0
[pid 5151] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5151] setpgid(0, 0) = 0
[pid 5151] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5151] write(3, "1000", 4) = 4
[pid 5151] close(3) = 0
[pid 5151] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5151] memfd_create("syzkaller", 0) = 3
[pid 5151] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5151] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5151] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5151] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 57.976512][ T5149] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5151] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5151] close(3) = 0
[pid 5151] mkdir("./file0", 0777) = 0
[pid 5151] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5151] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5151] chdir("./file0") = 0
[pid 5151] ioctl(4, LOOP_CLR_FD) = 0
[pid 5151] close(4) = 0
[pid 5151] exit_group(0) = ?
[pid 5151] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5151, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./40", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./40/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./40/binderfs") = 0
umount2("./40/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./40/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./40/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./40/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./40/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
[ 58.037150][ T5151] loop0: detected capacity change from 0 to 512
[ 58.046381][ T5151] EXT4-fs: Ignoring removed oldalloc option
[ 58.053326][ T5151] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.064002][ T5151] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.072821][ T5151] EXT4-fs (loop0): 1 truncate cleaned up
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./40/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5154
./strace-static-x86_64: Process 5154 attached
[pid 5154] chdir("./41") = 0
[pid 5154] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5154] setpgid(0, 0) = 0
[pid 5154] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5154] write(3, "1000", 4) = 4
[pid 5154] close(3) = 0
[pid 5154] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5154] memfd_create("syzkaller", 0) = 3
[pid 5154] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5154] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5154] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5154] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5154] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5154] close(3) = 0
[pid 5154] mkdir("./file0", 0777) = 0
[pid 5154] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5154] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5154] chdir("./file0") = 0
[pid 5154] ioctl(4, LOOP_CLR_FD) = 0
[pid 5154] close(4) = 0
[pid 5154] exit_group(0) = ?
[pid 5154] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5154, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./41", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./41/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./41/binderfs") = 0
umount2("./41/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./41/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./41/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./41/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./41/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./41/file0") = 0
getdents64(3, 0x55555704c620 /* 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)
[ 58.142780][ T5154] loop0: detected capacity change from 0 to 512
[ 58.152495][ T5154] EXT4-fs: Ignoring removed oldalloc option
[ 58.159415][ T5154] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.171111][ T5154] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.180023][ T5154] EXT4-fs (loop0): 1 truncate cleaned up
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5156
./strace-static-x86_64: Process 5156 attached
[pid 5156] chdir("./42") = 0
[pid 5156] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5156] setpgid(0, 0) = 0
[pid 5156] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5156] write(3, "1000", 4) = 4
[pid 5156] close(3) = 0
[pid 5156] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5156] memfd_create("syzkaller", 0) = 3
[pid 5156] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5156] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5156] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5156] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5156] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5156] close(3) = 0
[pid 5156] mkdir("./file0", 0777) = 0
[pid 5156] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5156] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5156] chdir("./file0") = 0
[pid 5156] ioctl(4, LOOP_CLR_FD) = 0
[pid 5156] close(4) = 0
[pid 5156] exit_group(0) = ?
[pid 5156] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5156, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./42", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./42/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./42/binderfs") = 0
umount2("./42/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./42/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./42/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./42/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./42/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./42/file0") = 0
getdents64(3, 0x55555704c620 /* 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
[ 58.237934][ T5156] loop0: detected capacity change from 0 to 512
[ 58.247071][ T5156] EXT4-fs: Ignoring removed oldalloc option
[ 58.254489][ T5156] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.264928][ T5156] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.273631][ T5156] EXT4-fs (loop0): 1 truncate cleaned up
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5158
./strace-static-x86_64: Process 5158 attached
[pid 5158] chdir("./43") = 0
[pid 5158] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5158] setpgid(0, 0) = 0
[pid 5158] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5158] write(3, "1000", 4) = 4
[pid 5158] close(3) = 0
[pid 5158] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5158] memfd_create("syzkaller", 0) = 3
[pid 5158] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5158] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5158] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5158] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5158] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5158] close(3) = 0
[pid 5158] mkdir("./file0", 0777) = 0
[ 58.338698][ T5158] loop0: detected capacity change from 0 to 512
[ 58.345254][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 58.345336][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[ 58.345449][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 58.345814][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[ 58.345837][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 58.345897][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[ 58.345919][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 58.345975][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[ 58.345997][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 58.346052][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[pid 5158] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5158] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5158] chdir("./file0") = 0
[pid 5158] ioctl(4, LOOP_CLR_FD) = 0
[pid 5158] close(4) = 0
[pid 5158] exit_group(0) = ?
[pid 5158] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5158, si_uid=0, si_status=0, si_utime=0, si_stime=15 /* 0.15 s */} ---
umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./43/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./43/binderfs") = 0
umount2("./43/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./43/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./43/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./43/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./43/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./43/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5160
./strace-static-x86_64: Process 5160 attached
[pid 5160] chdir("./44") = 0
[pid 5160] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5160] setpgid(0, 0) = 0
[pid 5160] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5160] write(3, "1000", 4) = 4
[pid 5160] close(3) = 0
[ 58.346072][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 58.360555][ T5158] EXT4-fs: Ignoring removed oldalloc option
[ 58.448723][ T5158] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.459741][ T5158] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.469038][ T5158] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5160] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5160] memfd_create("syzkaller", 0) = 3
[pid 5160] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5160] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5160] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5160] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5160] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5160] close(3) = 0
[pid 5160] mkdir("./file0", 0777) = 0
[pid 5160] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5160] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5160] chdir("./file0") = 0
[pid 5160] ioctl(4, LOOP_CLR_FD) = 0
[pid 5160] close(4) = 0
[pid 5160] exit_group(0) = ?
[pid 5160] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5160, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./44", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./44/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./44/binderfs") = 0
umount2("./44/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./44/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./44/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./44/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./44/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./44/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
[ 58.527683][ T5160] loop0: detected capacity change from 0 to 512
[ 58.537195][ T5160] EXT4-fs: Ignoring removed oldalloc option
[ 58.544653][ T5160] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.555768][ T5160] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.565331][ T5160] EXT4-fs (loop0): 1 truncate cleaned up
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=0x55555704b5d0) = 5162
./strace-static-x86_64: Process 5162 attached
[pid 5162] chdir("./45") = 0
[pid 5162] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5162] setpgid(0, 0) = 0
[pid 5162] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5162] write(3, "1000", 4) = 4
[pid 5162] close(3) = 0
[pid 5162] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5162] memfd_create("syzkaller", 0) = 3
[pid 5162] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5162] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5162] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5162] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5162] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5162] close(3) = 0
[pid 5162] mkdir("./file0", 0777) = 0
[pid 5162] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5162] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5162] chdir("./file0") = 0
[pid 5162] ioctl(4, LOOP_CLR_FD) = 0
[pid 5162] close(4) = 0
[pid 5162] exit_group(0) = ?
[pid 5162] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5162, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./45", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./45/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./45/binderfs") = 0
umount2("./45/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./45/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./45/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./45/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./45/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./45/file0") = 0
getdents64(3, 0x55555704c620 /* 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=0x55555704b5d0) = 5164
./strace-static-x86_64: Process 5164 attached
[pid 5164] chdir("./46") = 0
[pid 5164] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5164] setpgid(0, 0) = 0
[pid 5164] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5164] write(3, "1000", 4) = 4
[pid 5164] close(3) = 0
[pid 5164] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5164] memfd_create("syzkaller", 0) = 3
[pid 5164] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 58.626179][ T5162] loop0: detected capacity change from 0 to 512
[ 58.635300][ T5162] EXT4-fs: Ignoring removed oldalloc option
[ 58.642163][ T5162] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.652526][ T5162] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.662664][ T5162] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5164] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5164] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5164] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5164] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5164] close(3) = 0
[pid 5164] mkdir("./file0", 0777) = 0
[pid 5164] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5164] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5164] chdir("./file0") = 0
[pid 5164] ioctl(4, LOOP_CLR_FD) = 0
[pid 5164] close(4) = 0
[pid 5164] exit_group(0) = ?
[pid 5164] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5164, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./46", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./46/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./46/binderfs") = 0
umount2("./46/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./46/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./46/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./46/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./46/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./46/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./46") = 0
mkdir("./47", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5166
./strace-static-x86_64: Process 5166 attached
[pid 5166] chdir("./47") = 0
[pid 5166] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5166] setpgid(0, 0) = 0
[pid 5166] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5166] write(3, "1000", 4) = 4
[pid 5166] close(3) = 0
[ 58.712677][ T5164] loop0: detected capacity change from 0 to 512
[ 58.721915][ T5164] EXT4-fs: Ignoring removed oldalloc option
[ 58.728523][ T5164] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.739367][ T5164] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.748702][ T5164] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5166] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5166] memfd_create("syzkaller", 0) = 3
[pid 5166] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5166] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5166] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5166] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5166] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5166] close(3) = 0
[pid 5166] mkdir("./file0", 0777) = 0
[pid 5166] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5166] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5166] chdir("./file0") = 0
[pid 5166] ioctl(4, LOOP_CLR_FD) = 0
[pid 5166] close(4) = 0
[pid 5166] exit_group(0) = ?
[pid 5166] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5166, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./47", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./47/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./47/binderfs") = 0
umount2("./47/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./47/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./47/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./47/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./47/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./47/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./47") = 0
mkdir("./48", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
[ 58.815671][ T5166] loop0: detected capacity change from 0 to 512
[ 58.824712][ T5166] EXT4-fs: Ignoring removed oldalloc option
[ 58.831847][ T5166] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.842887][ T5166] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.852153][ T5166] EXT4-fs (loop0): 1 truncate cleaned up
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5168
./strace-static-x86_64: Process 5168 attached
[pid 5168] chdir("./48") = 0
[pid 5168] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5168] setpgid(0, 0) = 0
[pid 5168] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5168] write(3, "1000", 4) = 4
[pid 5168] close(3) = 0
[pid 5168] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5168] memfd_create("syzkaller", 0) = 3
[pid 5168] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5168] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5168] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5168] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5168] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5168] close(3) = 0
[pid 5168] mkdir("./file0", 0777) = 0
[pid 5168] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5168] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5168] chdir("./file0") = 0
[pid 5168] ioctl(4, LOOP_CLR_FD) = 0
[pid 5168] close(4) = 0
[pid 5168] exit_group(0) = ?
[pid 5168] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5168, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./48", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./48", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./48/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./48/binderfs") = 0
umount2("./48/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./48/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./48/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./48/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./48/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./48/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./48") = 0
mkdir("./49", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
[ 58.909351][ T5168] loop0: detected capacity change from 0 to 512
[ 58.918511][ T5168] EXT4-fs: Ignoring removed oldalloc option
[ 58.925718][ T5168] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 58.936269][ T5168] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 58.945178][ T5168] EXT4-fs (loop0): 1 truncate cleaned up
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5170
./strace-static-x86_64: Process 5170 attached
[pid 5170] chdir("./49") = 0
[pid 5170] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5170] setpgid(0, 0) = 0
[pid 5170] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5170] write(3, "1000", 4) = 4
[pid 5170] close(3) = 0
[pid 5170] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5170] memfd_create("syzkaller", 0) = 3
[pid 5170] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5170] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5170] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5170] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5170] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5170] close(3) = 0
[pid 5170] mkdir("./file0", 0777) = 0
[ 59.011772][ T5170] loop0: detected capacity change from 0 to 512
[ 59.013983][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 59.019750][ T5170] EXT4-fs: Ignoring removed oldalloc option
[ 59.036681][ T5170] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 59.047601][ T5170] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5170] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5170] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5170] chdir("./file0") = 0
[pid 5170] ioctl(4, LOOP_CLR_FD) = 0
[pid 5170] close(4) = 0
[pid 5170] exit_group(0) = ?
[pid 5170] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5170, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./49", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./49/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./49/binderfs") = 0
umount2("./49/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./49/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./49/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./49/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./49/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./49/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./49") = 0
[ 59.057330][ T5170] EXT4-fs (loop0): 1 truncate cleaned up
mkdir("./50", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5172
./strace-static-x86_64: Process 5172 attached
[pid 5172] chdir("./50") = 0
[pid 5172] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5172] setpgid(0, 0) = 0
[pid 5172] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5172] write(3, "1000", 4) = 4
[pid 5172] close(3) = 0
[pid 5172] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5172] memfd_create("syzkaller", 0) = 3
[pid 5172] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5172] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5172] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5172] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5172] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5172] close(3) = 0
[pid 5172] mkdir("./file0", 0777) = 0
[pid 5172] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5172] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5172] chdir("./file0") = 0
[pid 5172] ioctl(4, LOOP_CLR_FD) = 0
[pid 5172] close(4) = 0
[pid 5172] exit_group(0) = ?
[pid 5172] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5172, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
[ 59.118846][ T5172] loop0: detected capacity change from 0 to 512
[ 59.128109][ T5172] EXT4-fs: Ignoring removed oldalloc option
[ 59.135491][ T5172] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 59.146282][ T5172] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 59.156258][ T5172] EXT4-fs (loop0): 1 truncate cleaned up
umount2("./50", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./50", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./50/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./50/binderfs") = 0
umount2("./50/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./50/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./50/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./50/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./50/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./50/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./50") = 0
mkdir("./51", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5174
./strace-static-x86_64: Process 5174 attached
[pid 5174] chdir("./51") = 0
[pid 5174] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5174] setpgid(0, 0) = 0
[pid 5174] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5174] write(3, "1000", 4) = 4
[pid 5174] close(3) = 0
[pid 5174] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5174] memfd_create("syzkaller", 0) = 3
[pid 5174] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5174] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5174] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5174] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5174] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5174] close(3) = 0
[pid 5174] mkdir("./file0", 0777) = 0
[pid 5174] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5174] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5174] chdir("./file0") = 0
[pid 5174] ioctl(4, LOOP_CLR_FD) = 0
[pid 5174] close(4) = 0
[pid 5174] exit_group(0) = ?
[pid 5174] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5174, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./51", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./51/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./51/binderfs") = 0
umount2("./51/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./51/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./51/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./51/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[ 59.250127][ T5174] loop0: detected capacity change from 0 to 512
[ 59.259932][ T5174] EXT4-fs: Ignoring removed oldalloc option
[ 59.267392][ T5174] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 59.278025][ T5174] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 59.287401][ T5174] EXT4-fs (loop0): 1 truncate cleaned up
openat(AT_FDCWD, "./51/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./51/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./51") = 0
mkdir("./52", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5176
./strace-static-x86_64: Process 5176 attached
[pid 5176] chdir("./52") = 0
[pid 5176] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5176] setpgid(0, 0) = 0
[pid 5176] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5176] write(3, "1000", 4) = 4
[pid 5176] close(3) = 0
[pid 5176] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5176] memfd_create("syzkaller", 0) = 3
[pid 5176] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5176] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5176] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5176] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5176] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5176] close(3) = 0
[pid 5176] mkdir("./file0", 0777) = 0
[pid 5176] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5176] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5176] chdir("./file0") = 0
[pid 5176] ioctl(4, LOOP_CLR_FD) = 0
[pid 5176] close(4) = 0
[pid 5176] exit_group(0) = ?
[pid 5176] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5176, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./52/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./52/binderfs") = 0
umount2("./52/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./52/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./52/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./52/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./52/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
[ 59.366177][ T5176] loop0: detected capacity change from 0 to 512
[ 59.374472][ T5176] EXT4-fs: Ignoring removed oldalloc option
[ 59.381945][ T5176] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 59.392567][ T5176] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 59.402171][ T5176] EXT4-fs (loop0): 1 truncate cleaned up
rmdir("./52/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./52") = 0
mkdir("./53", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5178
./strace-static-x86_64: Process 5178 attached
[pid 5178] chdir("./53") = 0
[pid 5178] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5178] setpgid(0, 0) = 0
[pid 5178] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5178] write(3, "1000", 4) = 4
[pid 5178] close(3) = 0
[pid 5178] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5178] memfd_create("syzkaller", 0) = 3
[pid 5178] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5178] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5178] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5178] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5178] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5178] close(3) = 0
[pid 5178] mkdir("./file0", 0777) = 0
[pid 5178] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5178] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5178] chdir("./file0") = 0
[pid 5178] ioctl(4, LOOP_CLR_FD) = 0
[pid 5178] close(4) = 0
[pid 5178] exit_group(0) = ?
[pid 5178] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5178, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./53", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./53", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./53/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./53/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./53/binderfs") = 0
umount2("./53/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./53/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./53/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./53/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./53/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./53/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./53") = 0
mkdir("./54", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5180
./strace-static-x86_64: Process 5180 attached
[pid 5180] chdir("./54") = 0
[pid 5180] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5180] setpgid(0, 0) = 0
[pid 5180] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5180] write(3, "1000", 4) = 4
[pid 5180] close(3) = 0
[ 59.471076][ T5178] loop0: detected capacity change from 0 to 512
[ 59.479328][ T5178] EXT4-fs: Ignoring removed oldalloc option
[ 59.486507][ T5178] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 59.497670][ T5178] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 59.506310][ T5178] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5180] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5180] memfd_create("syzkaller", 0) = 3
[pid 5180] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5180] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5180] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5180] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5180] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5180] close(3) = 0
[pid 5180] mkdir("./file0", 0777) = 0
[ 59.563771][ T5180] loop0: detected capacity change from 0 to 512
[ 59.572672][ T5180] EXT4-fs: Ignoring removed oldalloc option
[ 59.579625][ T5180] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 59.590648][ T5180] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 59.600134][ T5180]
[ 59.602486][ T5180] ======================================================
[ 59.609494][ T5180] WARNING: possible circular locking dependency detected
[ 59.617023][ T5180] 6.2.0-rc3-syzkaller-00009-g5a41237ad1d4 #0 Not tainted
[ 59.624030][ T5180] ------------------------------------------------------
[ 59.631121][ T5180] syz-executor938/5180 is trying to acquire lock:
[ 59.637526][ T5180] ffff888072d18ea8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x58/0x4e0
[ 59.646401][ T5180]
[ 59.646401][ T5180] but task is already holding lock:
[ 59.653753][ T5180] ffff8880765c2aa8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x9f4/0xea0
[ 59.663055][ T5180]
[ 59.663055][ T5180] which lock already depends on the new lock.
[ 59.663055][ T5180]
[ 59.673453][ T5180]
[ 59.673453][ T5180] the existing dependency chain (in reverse order) is:
[ 59.682487][ T5180]
[ 59.682487][ T5180] -> #2 (&ei->i_data_sem/2){++++}-{3:3}:
[ 59.690302][ T5180] lock_acquire+0x182/0x3c0
[ 59.695318][ T5180] down_read+0x39/0x50
[ 59.699903][ T5180] ext4_map_blocks+0x398/0x1cc0
[ 59.705265][ T5180] ext4_getblk+0x1b9/0x770
[ 59.710277][ T5180] ext4_bread+0x2a/0x170
[ 59.715032][ T5180] ext4_quota_write+0x225/0x570
[ 59.720390][ T5180] get_free_dqblk+0x34a/0x6d0
[ 59.725589][ T5180] do_insert_tree+0x26b/0x1aa0
[ 59.730877][ T5180] do_insert_tree+0x722/0x1aa0
[ 59.736149][ T5180] do_insert_tree+0x722/0x1aa0
[ 59.741425][ T5180] do_insert_tree+0x722/0x1aa0
[ 59.746712][ T5180] qtree_write_dquot+0x3b6/0x530
[ 59.752156][ T5180] v2_write_dquot+0x11b/0x190
[ 59.757346][ T5180] dquot_acquire+0x348/0x670
[ 59.762459][ T5180] ext4_acquire_dquot+0x2dc/0x400
[ 59.767988][ T5180] dqget+0x999/0xdc0
[ 59.772395][ T5180] __dquot_initialize+0x291/0xcf0
[ 59.777927][ T5180] ext4_process_orphan+0x57/0x2d0
[ 59.783543][ T5180] ext4_orphan_cleanup+0xb60/0x1340
[ 59.789257][ T5180] ext4_fill_super+0x81cd/0x8700
[ 59.794709][ T5180] get_tree_bdev+0x400/0x620
[ 59.800356][ T5180] vfs_get_tree+0x88/0x270
[ 59.805288][ T5180] do_new_mount+0x289/0xad0
[ 59.810336][ T5180] __se_sys_mount+0x2d3/0x3c0
[ 59.815532][ T5180] do_syscall_64+0x3d/0xb0
[ 59.820505][ T5180] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 59.826944][ T5180]
[ 59.826944][ T5180] -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}:
[ 59.835004][ T5180] lock_acquire+0x182/0x3c0
[ 59.840049][ T5180] down_read+0x39/0x50
[ 59.844727][ T5180] v2_read_dquot+0x4a/0x100
[ 59.849752][ T5180] dquot_acquire+0x186/0x670
[ 59.854858][ T5180] ext4_acquire_dquot+0x2dc/0x400
[ 59.860414][ T5180] dqget+0x999/0xdc0
[ 59.864837][ T5180] __dquot_initialize+0x291/0xcf0
[ 59.870372][ T5180] ext4_process_orphan+0x57/0x2d0
[ 59.875942][ T5180] ext4_orphan_cleanup+0xb60/0x1340
[ 59.881648][ T5180] ext4_fill_super+0x81cd/0x8700
[ 59.887090][ T5180] get_tree_bdev+0x400/0x620
[ 59.892189][ T5180] vfs_get_tree+0x88/0x270
[ 59.897116][ T5180] do_new_mount+0x289/0xad0
[ 59.902126][ T5180] __se_sys_mount+0x2d3/0x3c0
[ 59.907305][ T5180] do_syscall_64+0x3d/0xb0
[ 59.912231][ T5180] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 59.918728][ T5180]
[ 59.918728][ T5180] -> #0 (&dquot->dq_lock){+.+.}-{3:3}:
[ 59.926354][ T5180] validate_chain+0x1898/0x6ae0
[ 59.931714][ T5180] __lock_acquire+0x1292/0x1f60
[ 59.937077][ T5180] lock_acquire+0x182/0x3c0
[ 59.942097][ T5180] __mutex_lock_common+0x1bd/0x26e0
[ 59.947803][ T5180] mutex_lock_nested+0x17/0x20
[ 59.953207][ T5180] dquot_commit+0x58/0x4e0
[ 59.958216][ T5180] ext4_write_dquot+0x1ea/0x2b0
[ 59.963578][ T5180] __dquot_free_space+0x9b8/0xfd0
[ 59.969110][ T5180] ext4_free_blocks+0x1c4a/0x2810
[ 59.974641][ T5180] ext4_ext_remove_space+0x1f5f/0x46a0
[ 59.980609][ T5180] ext4_ext_truncate+0x177/0x220
[ 59.986061][ T5180] ext4_truncate+0xa6a/0xea0
[ 59.991173][ T5180] ext4_process_orphan+0x1aa/0x2d0
[ 59.996795][ T5180] ext4_orphan_cleanup+0xb60/0x1340
[ 60.002507][ T5180] ext4_fill_super+0x81cd/0x8700
[ 60.007949][ T5180] get_tree_bdev+0x400/0x620
[ 60.013064][ T5180] vfs_get_tree+0x88/0x270
[ 60.018006][ T5180] do_new_mount+0x289/0xad0
[ 60.023020][ T5180] __se_sys_mount+0x2d3/0x3c0
[ 60.028201][ T5180] do_syscall_64+0x3d/0xb0
[ 60.033124][ T5180] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 60.039533][ T5180]
[ 60.039533][ T5180] other info that might help us debug this:
[ 60.039533][ T5180]
[ 60.049758][ T5180] Chain exists of:
[ 60.049758][ T5180] &dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2
[ 60.049758][ T5180]
[ 60.063443][ T5180] Possible unsafe locking scenario:
[ 60.063443][ T5180]
[ 60.070878][ T5180] CPU0 CPU1
[ 60.076228][ T5180] ---- ----
[ 60.081580][ T5180] lock(&ei->i_data_sem/2);
[ 60.086176][ T5180] lock(&s->s_dquot.dqio_sem);
[ 60.093529][ T5180] lock(&ei->i_data_sem/2);
[ 60.100624][ T5180] lock(&dquot->dq_lock);
[ 60.105028][ T5180]
[ 60.105028][ T5180] *** DEADLOCK ***
[ 60.105028][ T5180]
[ 60.113157][ T5180] 4 locks held by syz-executor938/5180:
[ 60.118682][ T5180] #0: ffff88802a9c00e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x212/0x920
[ 60.128763][ T5180] #1: ffff8880765c2c20 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_process_orphan+0x164/0x2d0
[ 60.139701][ T5180] #2: ffff8880765c2aa8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x9f4/0xea0
[ 60.149343][ T5180] #3: ffffffff8d46e788 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30
[ 60.158375][ T5180]
[ 60.158375][ T5180] stack backtrace:
[ 60.164246][ T5180] CPU: 1 PID: 5180 Comm: syz-executor938 Not tainted 6.2.0-rc3-syzkaller-00009-g5a41237ad1d4 #0
[ 60.174638][ T5180] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 60.184767][ T5180] Call Trace:
[ 60.188036][ T5180]
[ 60.190956][ T5180] dump_stack_lvl+0x1b1/0x290
[ 60.195632][ T5180] ? nf_tcp_handle_invalid+0x630/0x630
[ 60.201096][ T5180] ? print_circular_bug+0x13e/0x1c0
[ 60.206281][ T5180] check_noncircular+0x2cc/0x390
[ 60.211206][ T5180] ? add_chain_block+0x850/0x850
[ 60.216132][ T5180] ? lockdep_lock+0x102/0x290
[ 60.220801][ T5180] ? stack_trace_save+0x104/0x1e0
[ 60.225874][ T5180] ? _find_first_zero_bit+0xe8/0x110
[ 60.231182][ T5180] validate_chain+0x1898/0x6ae0
[ 60.236081][ T5180] ? check_noncircular+0x1aa/0x390
[ 60.241216][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.246577][ T5180] ? add_chain_block+0x850/0x850
[ 60.251509][ T5180] ? lockdep_lock+0x102/0x290
[ 60.256263][ T5180] ? lockdep_unlock+0x144/0x2e0
[ 60.261100][ T5180] ? lockdep_lock+0x290/0x290
[ 60.265762][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.271120][ T5180] ? _find_first_zero_bit+0xe8/0x110
[ 60.276396][ T5180] ? validate_chain+0x1478/0x6ae0
[ 60.281514][ T5180] ? hlock_conflict+0x54/0x1f0
[ 60.286289][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.291665][ T5180] ? __bfs+0x369/0x700
[ 60.295725][ T5180] ? check_path+0x40/0x40
[ 60.300060][ T5180] ? rcu_lock_release+0x5/0x20
[ 60.304837][ T5180] ? trace_lock_release+0x95/0x220
[ 60.309949][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.315343][ T5180] ? check_noncircular+0x1aa/0x390
[ 60.320446][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.325820][ T5180] ? lockdep_lock+0x102/0x290
[ 60.330493][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.335860][ T5180] ? lockdep_unlock+0x144/0x2e0
[ 60.340707][ T5180] ? _find_first_zero_bit+0xe8/0x110
[ 60.345990][ T5180] ? validate_chain+0x1478/0x6ae0
[ 60.351030][ T5180] ? reacquire_held_locks+0x650/0x650
[ 60.356419][ T5180] ? validate_chain+0x1478/0x6ae0
[ 60.361435][ T5180] ? check_noncircular+0x1aa/0x390
[ 60.366543][ T5180] ? add_chain_block+0x850/0x850
[ 60.371486][ T5180] ? lockdep_lock+0x102/0x290
[ 60.376152][ T5180] ? stack_trace_save+0x1e0/0x1e0
[ 60.381166][ T5180] ? rcu_read_lock_sched_held+0x87/0x110
[ 60.386788][ T5180] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 60.392777][ T5180] ? rcu_read_lock_sched_held+0x87/0x110
[ 60.398413][ T5180] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 60.404383][ T5180] ? finish_lock_switch+0x89/0x100
[ 60.409514][ T5180] ? trace_lock_release+0x95/0x220
[ 60.414614][ T5180] ? mark_lock+0x9a/0x350
[ 60.418932][ T5180] ? rcu_read_lock_sched_held+0x87/0x110
[ 60.424564][ T5180] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 60.430545][ T5180] ? mark_lock+0x9a/0x350
[ 60.434861][ T5180] ? __lock_acquire+0x1292/0x1f60
[ 60.439871][ T5180] ? rcu_preempt_deferred_qs_irqrestore+0x849/0xc10
[ 60.446446][ T5180] ? trace_lock_release+0x95/0x220
[ 60.451647][ T5180] ? mark_lock+0x9a/0x350
[ 60.455977][ T5180] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 60.461946][ T5180] ? mark_lock+0x9a/0x350
[ 60.466278][ T5180] ? mark_lock+0x9a/0x350
[ 60.470610][ T5180] ? rcu_read_lock_sched_held+0x87/0x110
[ 60.476231][ T5180] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 60.482211][ T5180] ? mark_lock+0x9a/0x350
[ 60.486542][ T5180] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 60.492602][ T5180] ? print_irqtrace_events+0x220/0x220
[ 60.498058][ T5180] ? __free_object+0x1fb/0xa60
[ 60.502814][ T5180] ? lockdep_hardirqs_on+0x8d/0x130
[ 60.508008][ T5180] ? mark_lock+0x9a/0x350
[ 60.512329][ T5180] ? mark_lock+0x9a/0x350
[ 60.516658][ T5180] ? mark_lock+0x9a/0x350
[ 60.520990][ T5180] __lock_acquire+0x1292/0x1f60
[ 60.525856][ T5180] lock_acquire+0x182/0x3c0
[ 60.530370][ T5180] ? dquot_commit+0x58/0x4e0
[ 60.534964][ T5180] ? read_lock_is_recursive+0x10/0x10
[ 60.540419][ T5180] ? print_irqtrace_events+0x220/0x220
[ 60.545875][ T5180] ? __might_sleep+0xc0/0xc0
[ 60.550464][ T5180] ? do_raw_spin_unlock+0x134/0x8a0
[ 60.555683][ T5180] ? _raw_spin_unlock_irqrestore+0x8b/0x120
[ 60.561583][ T5180] __mutex_lock_common+0x1bd/0x26e0
[ 60.566773][ T5180] ? dquot_commit+0x58/0x4e0
[ 60.571353][ T5180] ? dquot_commit+0x58/0x4e0
[ 60.575928][ T5180] ? __might_sleep+0xc0/0xc0
[ 60.580505][ T5180] ? mutex_lock_io_nested+0x60/0x60
[ 60.586558][ T5180] ? rcu_read_lock_sched_held+0x87/0x110
[ 60.592178][ T5180] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 60.598147][ T5180] ? read_lock_is_recursive+0x10/0x10
[ 60.603515][ T5180] mutex_lock_nested+0x17/0x20
[ 60.608373][ T5180] dquot_commit+0x58/0x4e0
[ 60.612794][ T5180] ? __ext4_journal_start_sb+0x19b/0x1f0
[ 60.618425][ T5180] ext4_write_dquot+0x1ea/0x2b0
[ 60.623358][ T5180] __dquot_free_space+0x9b8/0xfd0
[ 60.628723][ T5180] ? dquot_reclaim_space_nodirty+0x800/0x800
[ 60.634709][ T5180] ? ext4_block_bitmap_csum_set+0x1c3/0x4f0
[ 60.640607][ T5180] ? lock_set_class+0x890/0x8c0
[ 60.645475][ T5180] ext4_free_blocks+0x1c4a/0x2810
[ 60.650506][ T5180] ? __lock_acquire+0x1f60/0x1f60
[ 60.655819][ T5180] ? trace_ext4_allocate_blocks+0x2f0/0x2f0
[ 60.661711][ T5180] ? rcu_read_lock_sched_held+0x87/0x110
[ 60.667334][ T5180] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 60.673300][ T5180] ? __ext4_journal_ensure_credits+0x2c/0x460
[ 60.679356][ T5180] ? ext4_inode_journal_mode+0x185/0x460
[ 60.684989][ T5180] ? trace_ext4_remove_blocks+0x10b/0x330
[ 60.690709][ T5180] ext4_ext_remove_space+0x1f5f/0x46a0
[ 60.696173][ T5180] ? ext4_da_release_space+0x1de/0x370
[ 60.701631][ T5180] ? ext4_ext_index_trans_blocks+0x120/0x120
[ 60.707610][ T5180] ? ext4_es_remove_extent+0x1ab/0x260
[ 60.713059][ T5180] ? trace_ext4_es_lookup_extent_exit+0x300/0x300
[ 60.719467][ T5180] ? down_write+0x1a5/0x270
[ 60.723977][ T5180] ? trace_ext4_fc_stats+0x2f0/0x2f0
[ 60.729248][ T5180] ? down_read_killable+0x80/0x80
[ 60.734277][ T5180] ext4_ext_truncate+0x177/0x220
[ 60.739232][ T5180] ext4_truncate+0xa6a/0xea0
[ 60.743962][ T5180] ? __ext4_mark_inode_dirty+0x670/0x670
[ 60.749591][ T5180] ext4_process_orphan+0x1aa/0x2d0
[ 60.754694][ T5180] ext4_orphan_cleanup+0xb60/0x1340
[ 60.759885][ T5180] ? ext4_orphan_del+0xc20/0xc20
[ 60.764824][ T5180] ? __init_swait_queue_head+0xa6/0x140
[ 60.770367][ T5180] ? errseq_check_and_advance+0x5e/0x110
[ 60.775992][ T5180] ext4_fill_super+0x81cd/0x8700
[ 60.780928][ T5180] ? ext4_parse_test_dummy_encryption+0xb0/0xb0
[ 60.787157][ T5180] ? snprintf+0xc0/0x110
[ 60.791391][ T5180] ? set_blocksize+0x1ec/0x390
[ 60.796149][ T5180] ? sb_set_blocksize+0x95/0xf0
[ 60.801004][ T5180] get_tree_bdev+0x400/0x620
[ 60.805621][ T5180] ? ext4_parse_test_dummy_encryption+0xb0/0xb0
[ 60.811965][ T5180] vfs_get_tree+0x88/0x270
[ 60.816379][ T5180] do_new_mount+0x289/0xad0
[ 60.820887][ T5180] ? do_move_mount_old+0x150/0x150
[ 60.826038][ T5180] ? user_path_at_empty+0x149/0x1a0
[ 60.831497][ T5180] __se_sys_mount+0x2d3/0x3c0
[ 60.836172][ T5180] ? __x64_sys_mount+0xc0/0xc0
[ 60.840951][ T5180] ? syscall_enter_from_user_mode+0x2e/0x1d0
[ 60.846921][ T5180] ? __x64_sys_mount+0x1c/0xc0
[ 60.851678][ T5180] do_syscall_64+0x3d/0xb0
[ 60.856090][ T5180] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 60.861978][ T5180] RIP: 0033:0x7fa8e6fbae7a
[ 60.866380][ T5180] Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 60.885973][ T5180] RSP: 002b:00007fffdc482658 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 60.894379][ T5180] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fa8e6fbae7a
[ 60.902352][ T5180] RDX: 0000000020000040 RSI: 0000000020000500 RDI: 00007fffdc482660
[ 60.910318][ T5180] RBP: 00007fffdc482660 R08: 00007fffdc4826a0 R09: 00000000000004a1
[pid 5180] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5180] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5180] chdir("./file0") = 0
[pid 5180] ioctl(4, LOOP_CLR_FD) = 0
[pid 5180] close(4) = 0
[pid 5180] exit_group(0) = ?
[pid 5180] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5180, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./54", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./54", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./54/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./54/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./54/binderfs") = 0
umount2("./54/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./54/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./54/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./54/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./54/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./54/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./54") = 0
mkdir("./55", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5182
./strace-static-x86_64: Process 5182 attached
[pid 5182] chdir("./55") = 0
[pid 5182] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5182] setpgid(0, 0) = 0
[ 60.918290][ T5180] R10: 0000000000000047 R11: 0000000000000246 R12: 0000000000000004
[ 60.926256][ T5180] R13: 000055555704b2c0 R14: 00007fffdc4826a0 R15: 0000000000000000
[ 60.934234][ T5180]
[ 60.938265][ T5180] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5182] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5182] write(3, "1000", 4) = 4
[pid 5182] close(3) = 0
[pid 5182] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5182] memfd_create("syzkaller", 0) = 3
[pid 5182] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5182] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5182] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5182] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5182] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5182] close(3) = 0
[pid 5182] mkdir("./file0", 0777) = 0
[pid 5182] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5182] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5182] chdir("./file0") = 0
[pid 5182] ioctl(4, LOOP_CLR_FD) = 0
[pid 5182] close(4) = 0
[pid 5182] exit_group(0) = ?
[pid 5182] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5182, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./55/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./55/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./55/binderfs") = 0
umount2("./55/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./55/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./55/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./55/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./55/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./55/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./55") = 0
mkdir("./56", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5184
./strace-static-x86_64: Process 5184 attached
[pid 5184] chdir("./56") = 0
[pid 5184] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5184] setpgid(0, 0) = 0
[pid 5184] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5184] write(3, "1000", 4) = 4
[pid 5184] close(3) = 0
[ 60.988460][ T5182] loop0: detected capacity change from 0 to 512
[ 60.996349][ T5182] EXT4-fs: Ignoring removed oldalloc option
[ 61.003065][ T5182] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.012916][ T5182] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.020697][ T5182] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5184] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5184] memfd_create("syzkaller", 0) = 3
[pid 5184] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5184] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5184] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5184] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5184] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5184] close(3) = 0
[pid 5184] mkdir("./file0", 0777) = 0
[pid 5184] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5184] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5184] chdir("./file0") = 0
[pid 5184] ioctl(4, LOOP_CLR_FD) = 0
[pid 5184] close(4) = 0
[pid 5184] exit_group(0) = ?
[pid 5184] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5184, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./56", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./56", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./56/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./56/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./56/binderfs") = 0
umount2("./56/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./56/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./56/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./56/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./56/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./56/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./56") = 0
mkdir("./57", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5186
./strace-static-x86_64: Process 5186 attached
[pid 5186] chdir("./57") = 0
[pid 5186] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5186] setpgid(0, 0) = 0
[pid 5186] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5186] write(3, "1000", 4) = 4
[pid 5186] close(3) = 0
[pid 5186] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5186] memfd_create("syzkaller", 0) = 3
[pid 5186] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5186] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5186] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5186] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.079404][ T5184] loop0: detected capacity change from 0 to 512
[ 61.087315][ T5184] EXT4-fs: Ignoring removed oldalloc option
[ 61.093893][ T5184] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.103678][ T5184] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.111885][ T5184] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5186] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5186] close(3) = 0
[pid 5186] mkdir("./file0", 0777) = 0
[pid 5186] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5186] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5186] chdir("./file0") = 0
[pid 5186] ioctl(4, LOOP_CLR_FD) = 0
[pid 5186] close(4) = 0
[pid 5186] exit_group(0) = ?
[pid 5186] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5186, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./57", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./57", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./57/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./57/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./57/binderfs") = 0
umount2("./57/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./57/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./57/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./57/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./57/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./57/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./57") = 0
mkdir("./58", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5188
./strace-static-x86_64: Process 5188 attached
[pid 5188] chdir("./58") = 0
[pid 5188] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5188] setpgid(0, 0) = 0
[pid 5188] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5188] write(3, "1000", 4) = 4
[pid 5188] close(3) = 0
[pid 5188] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5188] memfd_create("syzkaller", 0) = 3
[pid 5188] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5188] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5188] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5188] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.151007][ T5186] loop0: detected capacity change from 0 to 512
[ 61.158494][ T5186] EXT4-fs: Ignoring removed oldalloc option
[ 61.165588][ T5186] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.175507][ T5186] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.183277][ T5186] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5188] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5188] close(3) = 0
[pid 5188] mkdir("./file0", 0777) = 0
[pid 5188] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5188] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5188] chdir("./file0") = 0
[pid 5188] ioctl(4, LOOP_CLR_FD) = 0
[pid 5188] close(4) = 0
[pid 5188] exit_group(0) = ?
[pid 5188] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5188, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
umount2("./58", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./58", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./58/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./58/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./58/binderfs") = 0
umount2("./58/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./58/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./58/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./58/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./58/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./58/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./58") = 0
mkdir("./59", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5190
./strace-static-x86_64: Process 5190 attached
[pid 5190] chdir("./59") = 0
[pid 5190] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5190] setpgid(0, 0) = 0
[pid 5190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5190] write(3, "1000", 4) = 4
[pid 5190] close(3) = 0
[pid 5190] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5190] memfd_create("syzkaller", 0) = 3
[pid 5190] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5190] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5190] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5190] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.218380][ T5188] loop0: detected capacity change from 0 to 512
[ 61.226234][ T5188] EXT4-fs: Ignoring removed oldalloc option
[ 61.233277][ T5188] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.243417][ T5188] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.251413][ T5188] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5190] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5190] close(3) = 0
[pid 5190] mkdir("./file0", 0777) = 0
[pid 5190] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5190] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5190] chdir("./file0") = 0
[pid 5190] ioctl(4, LOOP_CLR_FD) = 0
[pid 5190] close(4) = 0
[pid 5190] exit_group(0) = ?
[pid 5190] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5190, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./59", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./59", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./59/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./59/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./59/binderfs") = 0
umount2("./59/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./59/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./59/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./59/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./59/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./59/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./59") = 0
mkdir("./60", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5192
./strace-static-x86_64: Process 5192 attached
[pid 5192] chdir("./60") = 0
[pid 5192] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5192] setpgid(0, 0) = 0
[pid 5192] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5192] write(3, "1000", 4) = 4
[pid 5192] close(3) = 0
[pid 5192] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5192] memfd_create("syzkaller", 0) = 3
[pid 5192] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5192] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5192] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5192] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.291991][ T5190] loop0: detected capacity change from 0 to 512
[ 61.299466][ T5190] EXT4-fs: Ignoring removed oldalloc option
[ 61.306628][ T5190] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.316756][ T5190] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.324887][ T5190] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5192] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5192] close(3) = 0
[pid 5192] mkdir("./file0", 0777) = 0
[pid 5192] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5192] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5192] chdir("./file0") = 0
[pid 5192] ioctl(4, LOOP_CLR_FD) = 0
[pid 5192] close(4) = 0
[pid 5192] exit_group(0) = ?
[pid 5192] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5192, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./60", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./60", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./60/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./60/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./60/binderfs") = 0
umount2("./60/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./60/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./60/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./60/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./60/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./60/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./60") = 0
mkdir("./61", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5194
./strace-static-x86_64: Process 5194 attached
[pid 5194] chdir("./61") = 0
[pid 5194] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5194] setpgid(0, 0) = 0
[pid 5194] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5194] write(3, "1000", 4) = 4
[pid 5194] close(3) = 0
[pid 5194] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5194] memfd_create("syzkaller", 0) = 3
[pid 5194] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5194] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5194] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5194] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.361257][ T5192] loop0: detected capacity change from 0 to 512
[ 61.369295][ T5192] EXT4-fs: Ignoring removed oldalloc option
[ 61.376439][ T5192] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.386623][ T5192] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.394792][ T5192] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5194] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5194] close(3) = 0
[pid 5194] mkdir("./file0", 0777) = 0
[pid 5194] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5194] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5194] chdir("./file0") = 0
[pid 5194] ioctl(4, LOOP_CLR_FD) = 0
[pid 5194] close(4) = 0
[pid 5194] exit_group(0) = ?
[pid 5194] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5194, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./61", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./61", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./61/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./61/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./61/binderfs") = 0
umount2("./61/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./61/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./61/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./61/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./61/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./61/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./61") = 0
mkdir("./62", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5196
./strace-static-x86_64: Process 5196 attached
[pid 5196] chdir("./62") = 0
[pid 5196] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5196] setpgid(0, 0) = 0
[pid 5196] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5196] write(3, "1000", 4) = 4
[pid 5196] close(3) = 0
[pid 5196] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5196] memfd_create("syzkaller", 0) = 3
[pid 5196] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5196] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5196] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5196] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.441577][ T5194] loop0: detected capacity change from 0 to 512
[ 61.451693][ T5194] EXT4-fs: Ignoring removed oldalloc option
[ 61.458456][ T5194] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.468414][ T5194] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.476576][ T5194] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5196] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5196] close(3) = 0
[pid 5196] mkdir("./file0", 0777) = 0
[pid 5196] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5196] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5196] chdir("./file0") = 0
[pid 5196] ioctl(4, LOOP_CLR_FD) = 0
[pid 5196] close(4) = 0
[pid 5196] exit_group(0) = ?
[pid 5196] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5196, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./62", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./62", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./62/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./62/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./62/binderfs") = 0
umount2("./62/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./62/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./62/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./62/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./62/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./62/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./62") = 0
mkdir("./63", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5198 attached
, child_tidptr=0x55555704b5d0) = 5198
[pid 5198] chdir("./63") = 0
[pid 5198] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5198] setpgid(0, 0) = 0
[pid 5198] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5198] write(3, "1000", 4) = 4
[pid 5198] close(3) = 0
[pid 5198] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5198] memfd_create("syzkaller", 0) = 3
[pid 5198] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5198] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5198] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5198] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.512206][ T5196] loop0: detected capacity change from 0 to 512
[ 61.519980][ T5196] EXT4-fs: Ignoring removed oldalloc option
[ 61.526699][ T5196] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.536644][ T5196] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.544844][ T5196] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5198] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5198] close(3) = 0
[pid 5198] mkdir("./file0", 0777) = 0
[pid 5198] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5198] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5198] chdir("./file0") = 0
[pid 5198] ioctl(4, LOOP_CLR_FD) = 0
[pid 5198] close(4) = 0
[pid 5198] exit_group(0) = ?
[pid 5198] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5198, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./63", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./63", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./63/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./63/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./63/binderfs") = 0
umount2("./63/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./63/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./63/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./63/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./63/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./63/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./63") = 0
mkdir("./64", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5200
./strace-static-x86_64: Process 5200 attached
[pid 5200] chdir("./64") = 0
[pid 5200] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5200] setpgid(0, 0) = 0
[pid 5200] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5200] write(3, "1000", 4) = 4
[pid 5200] close(3) = 0
[pid 5200] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5200] memfd_create("syzkaller", 0) = 3
[pid 5200] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5200] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5200] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5200] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.585632][ T5198] loop0: detected capacity change from 0 to 512
[ 61.594091][ T5198] EXT4-fs: Ignoring removed oldalloc option
[ 61.600661][ T5198] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.610691][ T5198] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.618514][ T5198] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5200] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5200] close(3) = 0
[pid 5200] mkdir("./file0", 0777) = 0
[pid 5200] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5200] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5200] chdir("./file0") = 0
[pid 5200] ioctl(4, LOOP_CLR_FD) = 0
[pid 5200] close(4) = 0
[pid 5200] exit_group(0) = ?
[pid 5200] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5200, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./64", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./64/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./64/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./64/binderfs") = 0
umount2("./64/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./64/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./64/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./64/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./64/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./64/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./64") = 0
mkdir("./65", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5202
./strace-static-x86_64: Process 5202 attached
[pid 5202] chdir("./65") = 0
[pid 5202] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5202] setpgid(0, 0) = 0
[pid 5202] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5202] write(3, "1000", 4) = 4
[pid 5202] close(3) = 0
[pid 5202] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5202] memfd_create("syzkaller", 0) = 3
[pid 5202] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 61.652947][ T5200] loop0: detected capacity change from 0 to 512
[ 61.654198][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 61.660563][ T5200] EXT4-fs: Ignoring removed oldalloc option
[ 61.676050][ T5200] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.685728][ T5200] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.693712][ T5200] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5202] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5202] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5202] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5202] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5202] close(3) = 0
[pid 5202] mkdir("./file0", 0777) = 0
[pid 5202] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5202] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5202] chdir("./file0") = 0
[pid 5202] ioctl(4, LOOP_CLR_FD) = 0
[pid 5202] close(4) = 0
[pid 5202] exit_group(0) = ?
[pid 5202] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5202, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./65", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./65/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./65/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./65/binderfs") = 0
umount2("./65/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./65/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./65/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./65/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./65/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./65/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./65") = 0
mkdir("./66", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5204
./strace-static-x86_64: Process 5204 attached
[pid 5204] chdir("./66") = 0
[pid 5204] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5204] setpgid(0, 0) = 0
[pid 5204] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5204] write(3, "1000", 4) = 4
[pid 5204] close(3) = 0
[pid 5204] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5204] memfd_create("syzkaller", 0) = 3
[pid 5204] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5204] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5204] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5204] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.737193][ T5202] loop0: detected capacity change from 0 to 512
[ 61.746516][ T5202] EXT4-fs: Ignoring removed oldalloc option
[ 61.753491][ T5202] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.763270][ T5202] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.771530][ T5202] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5204] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5204] close(3) = 0
[pid 5204] mkdir("./file0", 0777) = 0
[pid 5204] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5204] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5204] chdir("./file0") = 0
[pid 5204] ioctl(4, LOOP_CLR_FD) = 0
[pid 5204] close(4) = 0
[pid 5204] exit_group(0) = ?
[pid 5204] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5204, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./66", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./66", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./66/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./66/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./66/binderfs") = 0
umount2("./66/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./66/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./66/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./66/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./66/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./66/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./66") = 0
mkdir("./67", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5206
./strace-static-x86_64: Process 5206 attached
[pid 5206] chdir("./67") = 0
[pid 5206] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5206] setpgid(0, 0) = 0
[pid 5206] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5206] write(3, "1000", 4) = 4
[pid 5206] close(3) = 0
[pid 5206] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5206] memfd_create("syzkaller", 0) = 3
[pid 5206] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5206] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 61.812367][ T5204] loop0: detected capacity change from 0 to 512
[ 61.820570][ T5204] EXT4-fs: Ignoring removed oldalloc option
[ 61.827698][ T5204] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.837700][ T5204] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.846155][ T5204] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5206] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5206] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5206] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5206] close(3) = 0
[pid 5206] mkdir("./file0", 0777) = 0
[pid 5206] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5206] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5206] chdir("./file0") = 0
[pid 5206] ioctl(4, LOOP_CLR_FD) = 0
[pid 5206] close(4) = 0
[pid 5206] exit_group(0) = ?
[pid 5206] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5206, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./67", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./67", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./67/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./67/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./67/binderfs") = 0
umount2("./67/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./67/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./67/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./67/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./67/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./67/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./67") = 0
mkdir("./68", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5208
./strace-static-x86_64: Process 5208 attached
[pid 5208] chdir("./68") = 0
[pid 5208] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5208] setpgid(0, 0) = 0
[pid 5208] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5208] write(3, "1000", 4) = 4
[pid 5208] close(3) = 0
[pid 5208] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5208] memfd_create("syzkaller", 0) = 3
[pid 5208] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5208] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5208] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5208] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.881475][ T5206] loop0: detected capacity change from 0 to 512
[ 61.885173][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 61.888962][ T5206] EXT4-fs: Ignoring removed oldalloc option
[ 61.904163][ T5206] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.913941][ T5206] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.922037][ T5206] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5208] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5208] close(3) = 0
[pid 5208] mkdir("./file0", 0777) = 0
[pid 5208] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5208] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5208] chdir("./file0") = 0
[pid 5208] ioctl(4, LOOP_CLR_FD) = 0
[pid 5208] close(4) = 0
[pid 5208] exit_group(0) = ?
[pid 5208] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5208, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./68", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./68", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./68/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./68/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./68/binderfs") = 0
umount2("./68/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./68/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./68/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./68/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./68/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./68/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./68") = 0
mkdir("./69", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5210
./strace-static-x86_64: Process 5210 attached
[pid 5210] chdir("./69") = 0
[pid 5210] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5210] setpgid(0, 0) = 0
[pid 5210] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5210] write(3, "1000", 4) = 4
[pid 5210] close(3) = 0
[pid 5210] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5210] memfd_create("syzkaller", 0) = 3
[pid 5210] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5210] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5210] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5210] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 61.962202][ T5208] loop0: detected capacity change from 0 to 512
[ 61.969827][ T5208] EXT4-fs: Ignoring removed oldalloc option
[ 61.976823][ T5208] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 61.987263][ T5208] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 61.995350][ T5208] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5210] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5210] close(3) = 0
[pid 5210] mkdir("./file0", 0777) = 0
[pid 5210] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5210] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5210] chdir("./file0") = 0
[pid 5210] ioctl(4, LOOP_CLR_FD) = 0
[pid 5210] close(4) = 0
[pid 5210] exit_group(0) = ?
[pid 5210] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5210, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./69", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./69", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./69/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./69/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./69/binderfs") = 0
umount2("./69/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./69/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./69/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./69/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./69/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./69/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./69") = 0
mkdir("./70", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5212
./strace-static-x86_64: Process 5212 attached
[pid 5212] chdir("./70") = 0
[pid 5212] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5212] setpgid(0, 0) = 0
[pid 5212] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5212] write(3, "1000", 4) = 4
[pid 5212] close(3) = 0
[pid 5212] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5212] memfd_create("syzkaller", 0) = 3
[pid 5212] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5212] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5212] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5212] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.031067][ T5210] loop0: detected capacity change from 0 to 512
[ 62.038711][ T5210] EXT4-fs: Ignoring removed oldalloc option
[ 62.045594][ T5210] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.055478][ T5210] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.063780][ T5210] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5212] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5212] close(3) = 0
[pid 5212] mkdir("./file0", 0777) = 0
[pid 5212] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5212] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5212] chdir("./file0") = 0
[pid 5212] ioctl(4, LOOP_CLR_FD) = 0
[pid 5212] close(4) = 0
[pid 5212] exit_group(0) = ?
[pid 5212] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5212, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
umount2("./70", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./70", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./70/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./70/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./70/binderfs") = 0
umount2("./70/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./70/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./70/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./70/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./70/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./70/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./70") = 0
mkdir("./71", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5214
./strace-static-x86_64: Process 5214 attached
[pid 5214] chdir("./71") = 0
[pid 5214] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5214] setpgid(0, 0) = 0
[pid 5214] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5214] write(3, "1000", 4) = 4
[pid 5214] close(3) = 0
[pid 5214] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5214] memfd_create("syzkaller", 0) = 3
[pid 5214] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5214] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5214] munmap(0x7fa8deb6c000, 262144) = 0
[ 62.099233][ T5212] loop0: detected capacity change from 0 to 512
[ 62.106812][ T5212] EXT4-fs: Ignoring removed oldalloc option
[ 62.113884][ T5212] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.124095][ T5212] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.132377][ T5212] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5214] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5214] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5214] close(3) = 0
[pid 5214] mkdir("./file0", 0777) = 0
[pid 5214] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5214] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5214] chdir("./file0") = 0
[pid 5214] ioctl(4, LOOP_CLR_FD) = 0
[pid 5214] close(4) = 0
[pid 5214] exit_group(0) = ?
[pid 5214] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5214, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./71", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./71", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./71/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./71/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./71/binderfs") = 0
umount2("./71/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./71/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./71/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./71/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./71/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./71/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./71") = 0
mkdir("./72", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5216 attached
, child_tidptr=0x55555704b5d0) = 5216
[pid 5216] chdir("./72") = 0
[pid 5216] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5216] setpgid(0, 0) = 0
[pid 5216] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5216] write(3, "1000", 4) = 4
[pid 5216] close(3) = 0
[pid 5216] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5216] memfd_create("syzkaller", 0) = 3
[pid 5216] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5216] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5216] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5216] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.171320][ T5214] loop0: detected capacity change from 0 to 512
[ 62.174368][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 62.183642][ T5214] EXT4-fs: Ignoring removed oldalloc option
[ 62.193830][ T5214] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.203787][ T5214] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.211826][ T5214] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5216] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5216] close(3) = 0
[pid 5216] mkdir("./file0", 0777) = 0
[pid 5216] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5216] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5216] chdir("./file0") = 0
[pid 5216] ioctl(4, LOOP_CLR_FD) = 0
[pid 5216] close(4) = 0
[pid 5216] exit_group(0) = ?
[pid 5216] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5216, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./72", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./72", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./72/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./72/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./72/binderfs") = 0
umount2("./72/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./72/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./72/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./72/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./72/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./72/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./72") = 0
mkdir("./73", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5218
./strace-static-x86_64: Process 5218 attached
[pid 5218] chdir("./73") = 0
[pid 5218] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5218] setpgid(0, 0) = 0
[pid 5218] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5218] write(3, "1000", 4) = 4
[pid 5218] close(3) = 0
[pid 5218] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5218] memfd_create("syzkaller", 0) = 3
[pid 5218] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5218] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5218] munmap(0x7fa8deb6c000, 262144) = 0
[ 62.251551][ T5216] loop0: detected capacity change from 0 to 512
[ 62.253274][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 62.260164][ T5216] EXT4-fs: Ignoring removed oldalloc option
[ 62.273292][ T5216] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.283817][ T5216] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.292714][ T5216] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5218] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5218] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5218] close(3) = 0
[pid 5218] mkdir("./file0", 0777) = 0
[pid 5218] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5218] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5218] chdir("./file0") = 0
[pid 5218] ioctl(4, LOOP_CLR_FD) = 0
[pid 5218] close(4) = 0
[pid 5218] exit_group(0) = ?
[pid 5218] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5218, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./73/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./73/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./73/binderfs") = 0
umount2("./73/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./73/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./73/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./73/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./73/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./73/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./73") = 0
mkdir("./74", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5220
./strace-static-x86_64: Process 5220 attached
[pid 5220] chdir("./74") = 0
[pid 5220] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5220] setpgid(0, 0) = 0
[pid 5220] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5220] write(3, "1000", 4) = 4
[pid 5220] close(3) = 0
[pid 5220] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5220] memfd_create("syzkaller", 0) = 3
[pid 5220] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 62.333077][ T5218] loop0: detected capacity change from 0 to 512
[ 62.340966][ T5218] EXT4-fs: Ignoring removed oldalloc option
[ 62.347653][ T5218] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.358061][ T5218] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.366869][ T5218] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5220] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5220] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5220] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5220] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5220] close(3) = 0
[pid 5220] mkdir("./file0", 0777) = 0
[pid 5220] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5220] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5220] chdir("./file0") = 0
[pid 5220] ioctl(4, LOOP_CLR_FD) = 0
[pid 5220] close(4) = 0
[pid 5220] exit_group(0) = ?
[pid 5220] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5220, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./74", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./74", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./74/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./74/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./74/binderfs") = 0
umount2("./74/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./74/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./74/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./74/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./74/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./74/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./74") = 0
mkdir("./75", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5222
./strace-static-x86_64: Process 5222 attached
[pid 5222] chdir("./75") = 0
[pid 5222] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5222] setpgid(0, 0) = 0
[pid 5222] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5222] write(3, "1000", 4) = 4
[pid 5222] close(3) = 0
[pid 5222] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5222] memfd_create("syzkaller", 0) = 3
[pid 5222] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5222] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 62.416629][ T5220] loop0: detected capacity change from 0 to 512
[ 62.425120][ T5220] EXT4-fs: Ignoring removed oldalloc option
[ 62.432423][ T5220] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.442617][ T5220] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.450950][ T5220] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5222] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5222] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5222] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5222] close(3) = 0
[pid 5222] mkdir("./file0", 0777) = 0
[pid 5222] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5222] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5222] chdir("./file0") = 0
[pid 5222] ioctl(4, LOOP_CLR_FD) = 0
[pid 5222] close(4) = 0
[pid 5222] exit_group(0) = ?
[pid 5222] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5222, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./75", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./75", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./75/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./75/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./75/binderfs") = 0
umount2("./75/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./75/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./75/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./75/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./75/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./75/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./75") = 0
mkdir("./76", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5224
./strace-static-x86_64: Process 5224 attached
[pid 5224] chdir("./76") = 0
[pid 5224] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5224] setpgid(0, 0) = 0
[pid 5224] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5224] write(3, "1000", 4) = 4
[pid 5224] close(3) = 0
[pid 5224] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5224] memfd_create("syzkaller", 0) = 3
[pid 5224] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5224] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5224] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5224] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.489330][ T5222] loop0: detected capacity change from 0 to 512
[ 62.491134][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 62.497162][ T5222] EXT4-fs: Ignoring removed oldalloc option
[ 62.511703][ T5222] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.522298][ T5222] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.530373][ T5222] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5224] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5224] close(3) = 0
[pid 5224] mkdir("./file0", 0777) = 0
[pid 5224] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5224] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5224] chdir("./file0") = 0
[pid 5224] ioctl(4, LOOP_CLR_FD) = 0
[pid 5224] close(4) = 0
[pid 5224] exit_group(0) = ?
[pid 5224] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5224, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./76", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./76", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./76/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./76/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./76/binderfs") = 0
umount2("./76/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./76/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./76/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./76/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./76/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./76/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./76") = 0
mkdir("./77", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5226
./strace-static-x86_64: Process 5226 attached
[pid 5226] chdir("./77") = 0
[pid 5226] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5226] setpgid(0, 0) = 0
[pid 5226] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5226] write(3, "1000", 4) = 4
[pid 5226] close(3) = 0
[pid 5226] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5226] memfd_create("syzkaller", 0) = 3
[pid 5226] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5226] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 62.568404][ T5224] loop0: detected capacity change from 0 to 512
[ 62.570418][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 62.576069][ T5224] EXT4-fs: Ignoring removed oldalloc option
[ 62.590271][ T5224] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.603644][ T5224] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.611647][ T5224] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5226] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5226] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5226] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5226] close(3) = 0
[pid 5226] mkdir("./file0", 0777) = 0
[pid 5226] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5226] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5226] chdir("./file0") = 0
[pid 5226] ioctl(4, LOOP_CLR_FD) = 0
[pid 5226] close(4) = 0
[pid 5226] exit_group(0) = ?
[pid 5226] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5226, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./77", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./77", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./77/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./77/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./77/binderfs") = 0
umount2("./77/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./77/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./77/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./77/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./77/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./77/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./77") = 0
mkdir("./78", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5228 attached
, child_tidptr=0x55555704b5d0) = 5228
[pid 5228] chdir("./78") = 0
[pid 5228] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5228] setpgid(0, 0) = 0
[pid 5228] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5228] write(3, "1000", 4) = 4
[pid 5228] close(3) = 0
[pid 5228] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5228] memfd_create("syzkaller", 0) = 3
[pid 5228] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5228] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5228] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5228] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.650204][ T5226] loop0: detected capacity change from 0 to 512
[ 62.658796][ T5226] EXT4-fs: Ignoring removed oldalloc option
[ 62.665467][ T5226] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.675224][ T5226] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.684267][ T5226] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5228] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5228] close(3) = 0
[pid 5228] mkdir("./file0", 0777) = 0
[ 62.716955][ T5228] loop0: detected capacity change from 0 to 512
[ 62.719320][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 62.731649][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 62.744283][ T5228] EXT4-fs: Ignoring removed oldalloc option
[ 62.750754][ T5228] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.760740][ T5228] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5228] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5228] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5228] chdir("./file0") = 0
[pid 5228] ioctl(4, LOOP_CLR_FD) = 0
[pid 5228] close(4) = 0
[pid 5228] exit_group(0) = ?
[pid 5228] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5228, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./78", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./78", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./78/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./78/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./78/binderfs") = 0
umount2("./78/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./78/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./78/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./78/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./78/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./78/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./78") = 0
mkdir("./79", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5230
./strace-static-x86_64: Process 5230 attached
[pid 5230] chdir("./79") = 0
[pid 5230] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5230] setpgid(0, 0) = 0
[pid 5230] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5230] write(3, "1000", 4) = 4
[pid 5230] close(3) = 0
[pid 5230] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5230] memfd_create("syzkaller", 0) = 3
[pid 5230] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5230] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5230] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5230] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5230] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5230] close(3) = 0
[pid 5230] mkdir("./file0", 0777) = 0
[ 62.768892][ T5228] EXT4-fs (loop0): 1 truncate cleaned up
[ 62.803045][ T5230] loop0: detected capacity change from 0 to 512
[ 62.811640][ T5230] EXT4-fs: Ignoring removed oldalloc option
[pid 5230] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5230] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5230] chdir("./file0") = 0
[pid 5230] ioctl(4, LOOP_CLR_FD) = 0
[pid 5230] close(4) = 0
[pid 5230] exit_group(0) = ?
[pid 5230] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5230, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./79", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./79", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./79/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./79/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./79/binderfs") = 0
umount2("./79/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./79/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./79/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./79/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./79/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./79/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./79") = 0
mkdir("./80", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5232
./strace-static-x86_64: Process 5232 attached
[pid 5232] chdir("./80") = 0
[pid 5232] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5232] setpgid(0, 0) = 0
[pid 5232] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5232] write(3, "1000", 4) = 4
[pid 5232] close(3) = 0
[pid 5232] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5232] memfd_create("syzkaller", 0) = 3
[pid 5232] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5232] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5232] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5232] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.818357][ T5230] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.828361][ T5230] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.836570][ T5230] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5232] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5232] close(3) = 0
[pid 5232] mkdir("./file0", 0777) = 0
[pid 5232] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5232] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5232] chdir("./file0") = 0
[pid 5232] ioctl(4, LOOP_CLR_FD) = 0
[pid 5232] close(4) = 0
[pid 5232] exit_group(0) = ?
[pid 5232] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5232, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./80", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./80", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./80/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./80/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./80/binderfs") = 0
umount2("./80/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./80/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./80/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./80/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./80/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./80/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./80") = 0
mkdir("./81", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5234
./strace-static-x86_64: Process 5234 attached
[pid 5234] chdir("./81") = 0
[pid 5234] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5234] setpgid(0, 0) = 0
[pid 5234] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5234] write(3, "1000", 4) = 4
[pid 5234] close(3) = 0
[pid 5234] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5234] memfd_create("syzkaller", 0) = 3
[pid 5234] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5234] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5234] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5234] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.877587][ T5232] loop0: detected capacity change from 0 to 512
[ 62.885221][ T5232] EXT4-fs: Ignoring removed oldalloc option
[ 62.892093][ T5232] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.902325][ T5232] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.910113][ T5232] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5234] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5234] close(3) = 0
[pid 5234] mkdir("./file0", 0777) = 0
[pid 5234] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5234] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5234] chdir("./file0") = 0
[pid 5234] ioctl(4, LOOP_CLR_FD) = 0
[pid 5234] close(4) = 0
[pid 5234] exit_group(0) = ?
[pid 5234] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5234, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./81", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./81", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./81/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./81/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./81/binderfs") = 0
umount2("./81/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./81/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./81/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./81/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./81/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./81/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./81") = 0
mkdir("./82", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5236
./strace-static-x86_64: Process 5236 attached
[pid 5236] chdir("./82") = 0
[pid 5236] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5236] setpgid(0, 0) = 0
[pid 5236] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5236] write(3, "1000", 4) = 4
[pid 5236] close(3) = 0
[pid 5236] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5236] memfd_create("syzkaller", 0) = 3
[pid 5236] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5236] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5236] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5236] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 62.950046][ T5234] loop0: detected capacity change from 0 to 512
[ 62.958494][ T5234] EXT4-fs: Ignoring removed oldalloc option
[ 62.965052][ T5234] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 62.974940][ T5234] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 62.983098][ T5234] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5236] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5236] close(3) = 0
[pid 5236] mkdir("./file0", 0777) = 0
[pid 5236] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5236] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5236] chdir("./file0") = 0
[pid 5236] ioctl(4, LOOP_CLR_FD) = 0
[pid 5236] close(4) = 0
[pid 5236] exit_group(0) = ?
[pid 5236] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5236, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./82", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./82", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./82/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./82/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./82/binderfs") = 0
umount2("./82/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./82/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./82/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./82/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./82/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./82/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./82") = 0
mkdir("./83", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5238
./strace-static-x86_64: Process 5238 attached
[pid 5238] chdir("./83") = 0
[pid 5238] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5238] setpgid(0, 0) = 0
[pid 5238] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5238] write(3, "1000", 4) = 4
[pid 5238] close(3) = 0
[pid 5238] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5238] memfd_create("syzkaller", 0) = 3
[pid 5238] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5238] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5238] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5238] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.025422][ T5236] loop0: detected capacity change from 0 to 512
[ 63.034214][ T5236] EXT4-fs: Ignoring removed oldalloc option
[ 63.040740][ T5236] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.050965][ T5236] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.058771][ T5236] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5238] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5238] close(3) = 0
[pid 5238] mkdir("./file0", 0777) = 0
[pid 5238] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5238] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5238] chdir("./file0") = 0
[pid 5238] ioctl(4, LOOP_CLR_FD) = 0
[pid 5238] close(4) = 0
[pid 5238] exit_group(0) = ?
[pid 5238] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5238, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./83", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./83", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./83/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./83/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./83/binderfs") = 0
umount2("./83/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./83/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./83/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./83/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./83/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./83/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./83") = 0
mkdir("./84", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5240
./strace-static-x86_64: Process 5240 attached
[pid 5240] chdir("./84") = 0
[pid 5240] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5240] setpgid(0, 0) = 0
[pid 5240] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5240] write(3, "1000", 4) = 4
[pid 5240] close(3) = 0
[pid 5240] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5240] memfd_create("syzkaller", 0) = 3
[pid 5240] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5240] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5240] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5240] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.096467][ T5238] loop0: detected capacity change from 0 to 512
[ 63.105236][ T5238] EXT4-fs: Ignoring removed oldalloc option
[ 63.112173][ T5238] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.122339][ T5238] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.130447][ T5238] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5240] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5240] close(3) = 0
[pid 5240] mkdir("./file0", 0777) = 0
[pid 5240] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5240] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5240] chdir("./file0") = 0
[pid 5240] ioctl(4, LOOP_CLR_FD) = 0
[pid 5240] close(4) = 0
[pid 5240] exit_group(0) = ?
[pid 5240] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5240, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./84", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./84", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./84/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./84/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./84/binderfs") = 0
umount2("./84/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./84/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./84/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./84/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./84/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./84/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./84") = 0
mkdir("./85", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5242
./strace-static-x86_64: Process 5242 attached
[pid 5242] chdir("./85") = 0
[pid 5242] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5242] setpgid(0, 0) = 0
[pid 5242] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5242] write(3, "1000", 4) = 4
[pid 5242] close(3) = 0
[pid 5242] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5242] memfd_create("syzkaller", 0) = 3
[pid 5242] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5242] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 63.160522][ T5240] loop0: detected capacity change from 0 to 512
[ 63.170131][ T5240] EXT4-fs: Ignoring removed oldalloc option
[ 63.177128][ T5240] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.187122][ T5240] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.195320][ T5240] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5242] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5242] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5242] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5242] close(3) = 0
[pid 5242] mkdir("./file0", 0777) = 0
[pid 5242] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5242] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5242] chdir("./file0") = 0
[pid 5242] ioctl(4, LOOP_CLR_FD) = 0
[pid 5242] close(4) = 0
[pid 5242] exit_group(0) = ?
[pid 5242] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5242, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./85", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./85", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./85/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./85/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./85/binderfs") = 0
umount2("./85/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./85/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./85/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./85/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./85/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./85/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./85") = 0
mkdir("./86", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5244
./strace-static-x86_64: Process 5244 attached
[pid 5244] chdir("./86") = 0
[pid 5244] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5244] setpgid(0, 0) = 0
[pid 5244] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5244] write(3, "1000", 4) = 4
[pid 5244] close(3) = 0
[pid 5244] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5244] memfd_create("syzkaller", 0) = 3
[pid 5244] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5244] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5244] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5244] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.245182][ T5242] loop0: detected capacity change from 0 to 512
[ 63.253037][ T5242] EXT4-fs: Ignoring removed oldalloc option
[ 63.259454][ T5242] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.269280][ T5242] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.277230][ T5242] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5244] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5244] close(3) = 0
[pid 5244] mkdir("./file0", 0777) = 0
[pid 5244] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5244] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5244] chdir("./file0") = 0
[pid 5244] ioctl(4, LOOP_CLR_FD) = 0
[pid 5244] close(4) = 0
[pid 5244] exit_group(0) = ?
[pid 5244] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5244, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./86", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./86", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./86/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./86/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./86/binderfs") = 0
umount2("./86/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./86/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./86/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./86/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./86/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./86/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./86") = 0
mkdir("./87", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5246 attached
, child_tidptr=0x55555704b5d0) = 5246
[pid 5246] chdir("./87") = 0
[pid 5246] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5246] setpgid(0, 0) = 0
[pid 5246] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5246] write(3, "1000", 4) = 4
[pid 5246] close(3) = 0
[pid 5246] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5246] memfd_create("syzkaller", 0) = 3
[pid 5246] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5246] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5246] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5246] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.314678][ T5244] loop0: detected capacity change from 0 to 512
[ 63.322554][ T5244] EXT4-fs: Ignoring removed oldalloc option
[ 63.329052][ T5244] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.339174][ T5244] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.347021][ T5244] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5246] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5246] close(3) = 0
[pid 5246] mkdir("./file0", 0777) = 0
[pid 5246] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5246] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5246] chdir("./file0") = 0
[pid 5246] ioctl(4, LOOP_CLR_FD) = 0
[pid 5246] close(4) = 0
[pid 5246] exit_group(0) = ?
[pid 5246] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5246, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./87", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./87", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./87/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./87/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./87/binderfs") = 0
umount2("./87/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./87/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./87/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./87/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./87/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./87/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
[ 63.385423][ T5246] loop0: detected capacity change from 0 to 512
[ 63.393497][ T5246] EXT4-fs: Ignoring removed oldalloc option
[ 63.399988][ T5246] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.410048][ T5246] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.418363][ T5246] EXT4-fs (loop0): 1 truncate cleaned up
close(3) = 0
rmdir("./87") = 0
mkdir("./88", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5248
./strace-static-x86_64: Process 5248 attached
[pid 5248] chdir("./88") = 0
[pid 5248] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5248] setpgid(0, 0) = 0
[pid 5248] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5248] write(3, "1000", 4) = 4
[pid 5248] close(3) = 0
[pid 5248] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5248] memfd_create("syzkaller", 0) = 3
[pid 5248] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5248] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5248] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5248] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5248] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5248] close(3) = 0
[pid 5248] mkdir("./file0", 0777) = 0
[ 63.482338][ T5248] loop0: detected capacity change from 0 to 512
[ 63.485830][ T5070] blk_print_req_error: 18 callbacks suppressed
[ 63.485843][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 63.491120][ T5248] EXT4-fs: Ignoring removed oldalloc option
[ 63.511442][ T5248] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.521340][ T5248] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5248] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5248] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5248] chdir("./file0") = 0
[pid 5248] ioctl(4, LOOP_CLR_FD) = 0
[pid 5248] close(4) = 0
[pid 5248] exit_group(0) = ?
[pid 5248] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5248, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./88", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./88", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./88/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./88/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./88/binderfs") = 0
umount2("./88/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./88/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./88/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./88/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./88/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./88/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./88") = 0
mkdir("./89", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5250
./strace-static-x86_64: Process 5250 attached
[pid 5250] chdir("./89") = 0
[pid 5250] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5250] setpgid(0, 0) = 0
[pid 5250] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5250] write(3, "1000", 4) = 4
[pid 5250] close(3) = 0
[pid 5250] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5250] memfd_create("syzkaller", 0) = 3
[pid 5250] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5250] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5250] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5250] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.529255][ T5248] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5250] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5250] close(3) = 0
[pid 5250] mkdir("./file0", 0777) = 0
[pid 5250] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5250] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5250] chdir("./file0") = 0
[pid 5250] ioctl(4, LOOP_CLR_FD) = 0
[pid 5250] close(4) = 0
[pid 5250] exit_group(0) = ?
[pid 5250] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5250, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./89", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./89", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./89/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./89/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./89/binderfs") = 0
umount2("./89/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./89/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./89/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./89/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./89/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./89/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./89") = 0
mkdir("./90", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5252
./strace-static-x86_64: Process 5252 attached
[pid 5252] chdir("./90") = 0
[pid 5252] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5252] setpgid(0, 0) = 0
[pid 5252] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5252] write(3, "1000", 4) = 4
[pid 5252] close(3) = 0
[pid 5252] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5252] memfd_create("syzkaller", 0) = 3
[pid 5252] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 63.561383][ T5250] loop0: detected capacity change from 0 to 512
[ 63.566800][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 63.569192][ T5250] EXT4-fs: Ignoring removed oldalloc option
[ 63.585070][ T5250] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.595370][ T5250] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.604108][ T5250] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5252] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5252] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5252] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5252] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5252] close(3) = 0
[pid 5252] mkdir("./file0", 0777) = 0
[pid 5252] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5252] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5252] chdir("./file0") = 0
[pid 5252] ioctl(4, LOOP_CLR_FD) = 0
[pid 5252] close(4) = 0
[pid 5252] exit_group(0) = ?
[pid 5252] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5252, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./90", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./90", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./90/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./90/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./90/binderfs") = 0
umount2("./90/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./90/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./90/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./90/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./90/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./90/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./90") = 0
mkdir("./91", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5254
./strace-static-x86_64: Process 5254 attached
[pid 5254] chdir("./91") = 0
[pid 5254] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5254] setpgid(0, 0) = 0
[pid 5254] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5254] write(3, "1000", 4) = 4
[pid 5254] close(3) = 0
[pid 5254] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5254] memfd_create("syzkaller", 0) = 3
[pid 5254] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5254] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5254] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5254] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.645685][ T5252] loop0: detected capacity change from 0 to 512
[ 63.654070][ T5252] EXT4-fs: Ignoring removed oldalloc option
[ 63.660516][ T5252] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.670386][ T5252] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.680459][ T5252] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5254] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5254] close(3) = 0
[pid 5254] mkdir("./file0", 0777) = 0
[pid 5254] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5254] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5254] chdir("./file0") = 0
[pid 5254] ioctl(4, LOOP_CLR_FD) = 0
[pid 5254] close(4) = 0
[pid 5254] exit_group(0) = ?
[pid 5254] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5254, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./91", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./91", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./91/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./91/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./91/binderfs") = 0
umount2("./91/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./91/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./91/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./91/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./91/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./91/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./91") = 0
mkdir("./92", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5256
./strace-static-x86_64: Process 5256 attached
[pid 5256] chdir("./92") = 0
[pid 5256] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5256] setpgid(0, 0) = 0
[pid 5256] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5256] write(3, "1000", 4) = 4
[pid 5256] close(3) = 0
[pid 5256] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5256] memfd_create("syzkaller", 0) = 3
[pid 5256] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5256] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5256] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5256] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.711065][ T5254] loop0: detected capacity change from 0 to 512
[ 63.716488][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 63.718610][ T5254] EXT4-fs: Ignoring removed oldalloc option
[ 63.734061][ T5254] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.743741][ T5254] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.751785][ T5254] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5256] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5256] close(3) = 0
[pid 5256] mkdir("./file0", 0777) = 0
[pid 5256] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5256] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5256] chdir("./file0") = 0
[pid 5256] ioctl(4, LOOP_CLR_FD) = 0
[pid 5256] close(4) = 0
[pid 5256] exit_group(0) = ?
[pid 5256] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5256, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./92", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./92", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./92/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./92/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./92/binderfs") = 0
umount2("./92/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./92/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./92/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./92/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./92/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./92/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./92") = 0
mkdir("./93", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5258
./strace-static-x86_64: Process 5258 attached
[pid 5258] chdir("./93") = 0
[pid 5258] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5258] setpgid(0, 0) = 0
[pid 5258] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5258] write(3, "1000", 4) = 4
[pid 5258] close(3) = 0
[pid 5258] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5258] memfd_create("syzkaller", 0) = 3
[pid 5258] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5258] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5258] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5258] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.785895][ T5256] loop0: detected capacity change from 0 to 512
[ 63.794690][ T5256] EXT4-fs: Ignoring removed oldalloc option
[ 63.802217][ T5256] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.812335][ T5256] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.820402][ T5256] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5258] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5258] close(3) = 0
[pid 5258] mkdir("./file0", 0777) = 0
[pid 5258] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5258] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5258] chdir("./file0") = 0
[pid 5258] ioctl(4, LOOP_CLR_FD) = 0
[pid 5258] close(4) = 0
[pid 5258] exit_group(0) = ?
[pid 5258] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5258, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./93", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./93", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./93/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./93/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./93/binderfs") = 0
umount2("./93/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./93/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./93/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./93/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./93/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./93/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./93") = 0
mkdir("./94", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5260
./strace-static-x86_64: Process 5260 attached
[pid 5260] chdir("./94") = 0
[pid 5260] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5260] setpgid(0, 0) = 0
[pid 5260] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5260] write(3, "1000", 4) = 4
[pid 5260] close(3) = 0
[pid 5260] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5260] memfd_create("syzkaller", 0) = 3
[pid 5260] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5260] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5260] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5260] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 63.856641][ T5258] loop0: detected capacity change from 0 to 512
[ 63.864686][ T5258] EXT4-fs: Ignoring removed oldalloc option
[ 63.871168][ T5258] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.881641][ T5258] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.889945][ T5258] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5260] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5260] close(3) = 0
[pid 5260] mkdir("./file0", 0777) = 0
[pid 5260] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5260] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5260] chdir("./file0") = 0
[pid 5260] ioctl(4, LOOP_CLR_FD) = 0
[pid 5260] close(4) = 0
[pid 5260] exit_group(0) = ?
[pid 5260] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5260, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./94", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./94", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./94/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./94/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./94/binderfs") = 0
[ 63.917734][ T5260] loop0: detected capacity change from 0 to 512
[ 63.918757][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 63.925256][ T5260] EXT4-fs: Ignoring removed oldalloc option
[ 63.940468][ T5260] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 63.950003][ T5260] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 63.958483][ T5260] EXT4-fs (loop0): 1 truncate cleaned up
umount2("./94/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./94/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./94/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./94/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./94/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./94/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./94") = 0
mkdir("./95", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5262
./strace-static-x86_64: Process 5262 attached
[pid 5262] chdir("./95") = 0
[pid 5262] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5262] setpgid(0, 0) = 0
[pid 5262] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5262] write(3, "1000", 4) = 4
[pid 5262] close(3) = 0
[pid 5262] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5262] memfd_create("syzkaller", 0) = 3
[pid 5262] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5262] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5262] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5262] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5262] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5262] close(3) = 0
[pid 5262] mkdir("./file0", 0777) = 0
[pid 5262] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5262] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5262] chdir("./file0") = 0
[pid 5262] ioctl(4, LOOP_CLR_FD) = 0
[pid 5262] close(4) = 0
[pid 5262] exit_group(0) = ?
[pid 5262] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5262, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./95", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./95", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./95/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./95/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./95/binderfs") = 0
umount2("./95/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./95/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./95/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./95/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./95/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./95/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./95") = 0
mkdir("./96", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5264
./strace-static-x86_64: Process 5264 attached
[pid 5264] chdir("./96") = 0
[pid 5264] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5264] setpgid(0, 0) = 0
[pid 5264] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5264] write(3, "1000", 4) = 4
[pid 5264] close(3) = 0
[pid 5264] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5264] memfd_create("syzkaller", 0) = 3
[pid 5264] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5264] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5264] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5264] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.023661][ T5262] loop0: detected capacity change from 0 to 512
[ 64.031754][ T5262] EXT4-fs: Ignoring removed oldalloc option
[ 64.038208][ T5262] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.047735][ T5262] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.056038][ T5262] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5264] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5264] close(3) = 0
[pid 5264] mkdir("./file0", 0777) = 0
[pid 5264] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5264] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5264] chdir("./file0") = 0
[pid 5264] ioctl(4, LOOP_CLR_FD) = 0
[pid 5264] close(4) = 0
[pid 5264] exit_group(0) = ?
[pid 5264] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5264, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./96", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./96", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./96/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./96/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./96/binderfs") = 0
umount2("./96/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./96/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./96/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./96/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./96/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./96/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./96") = 0
mkdir("./97", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5266
./strace-static-x86_64: Process 5266 attached
[pid 5266] chdir("./97") = 0
[pid 5266] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5266] setpgid(0, 0) = 0
[pid 5266] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5266] write(3, "1000", 4) = 4
[pid 5266] close(3) = 0
[pid 5266] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5266] memfd_create("syzkaller", 0) = 3
[pid 5266] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5266] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5266] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5266] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.084505][ T5264] loop0: detected capacity change from 0 to 512
[ 64.092284][ T5264] EXT4-fs: Ignoring removed oldalloc option
[ 64.098787][ T5264] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.108549][ T5264] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.116435][ T5264] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5266] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5266] close(3) = 0
[pid 5266] mkdir("./file0", 0777) = 0
[pid 5266] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5266] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5266] chdir("./file0") = 0
[pid 5266] ioctl(4, LOOP_CLR_FD) = 0
[pid 5266] close(4) = 0
[pid 5266] exit_group(0) = ?
[pid 5266] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5266, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./97", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./97", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./97/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./97/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./97/binderfs") = 0
umount2("./97/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./97/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./97/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./97/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./97/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./97/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./97") = 0
mkdir("./98", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5268
./strace-static-x86_64: Process 5268 attached
[pid 5268] chdir("./98") = 0
[pid 5268] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5268] setpgid(0, 0) = 0
[pid 5268] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5268] write(3, "1000", 4) = 4
[pid 5268] close(3) = 0
[pid 5268] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5268] memfd_create("syzkaller", 0) = 3
[ 64.144708][ T5266] loop0: detected capacity change from 0 to 512
[ 64.152353][ T5266] EXT4-fs: Ignoring removed oldalloc option
[ 64.159063][ T5266] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.168561][ T5266] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.177283][ T5266] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5268] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5268] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5268] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5268] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5268] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5268] close(3) = 0
[pid 5268] mkdir("./file0", 0777) = 0
[pid 5268] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5268] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5268] chdir("./file0") = 0
[pid 5268] ioctl(4, LOOP_CLR_FD) = 0
[pid 5268] close(4) = 0
[pid 5268] exit_group(0) = ?
[pid 5268] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5268, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./98", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./98", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./98/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./98/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./98/binderfs") = 0
umount2("./98/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./98/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./98/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./98/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./98/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./98/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./98") = 0
mkdir("./99", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5270
./strace-static-x86_64: Process 5270 attached
[pid 5270] chdir("./99") = 0
[pid 5270] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5270] setpgid(0, 0) = 0
[pid 5270] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5270] write(3, "1000", 4) = 4
[pid 5270] close(3) = 0
[pid 5270] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5270] memfd_create("syzkaller", 0) = 3
[pid 5270] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5270] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5270] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5270] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.230598][ T5268] loop0: detected capacity change from 0 to 512
[ 64.238309][ T5268] EXT4-fs: Ignoring removed oldalloc option
[ 64.244908][ T5268] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.255027][ T5268] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.263297][ T5268] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5270] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5270] close(3) = 0
[pid 5270] mkdir("./file0", 0777) = 0
[pid 5270] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5270] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5270] chdir("./file0") = 0
[pid 5270] ioctl(4, LOOP_CLR_FD) = 0
[pid 5270] close(4) = 0
[pid 5270] exit_group(0) = ?
[pid 5270] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5270, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./99", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./99", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./99/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./99/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./99/binderfs") = 0
umount2("./99/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./99/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./99/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./99/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./99/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./99/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./99") = 0
mkdir("./100", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5272
./strace-static-x86_64: Process 5272 attached
[pid 5272] chdir("./100") = 0
[pid 5272] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5272] setpgid(0, 0) = 0
[pid 5272] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5272] write(3, "1000", 4) = 4
[pid 5272] close(3) = 0
[pid 5272] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5272] memfd_create("syzkaller", 0) = 3
[pid 5272] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5272] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5272] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5272] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.301789][ T5270] loop0: detected capacity change from 0 to 512
[ 64.310131][ T5270] EXT4-fs: Ignoring removed oldalloc option
[ 64.316730][ T5270] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.326595][ T5270] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.334534][ T5270] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5272] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5272] close(3) = 0
[pid 5272] mkdir("./file0", 0777) = 0
[pid 5272] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5272] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5272] chdir("./file0") = 0
[pid 5272] ioctl(4, LOOP_CLR_FD) = 0
[pid 5272] close(4) = 0
[pid 5272] exit_group(0) = ?
[pid 5272] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5272, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./100", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./100", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./100/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./100/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./100/binderfs") = 0
umount2("./100/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./100/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./100/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./100/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./100/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./100/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./100") = 0
mkdir("./101", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5274 attached
, child_tidptr=0x55555704b5d0) = 5274
[pid 5274] chdir("./101") = 0
[pid 5274] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5274] setpgid(0, 0) = 0
[pid 5274] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5274] write(3, "1000", 4) = 4
[pid 5274] close(3) = 0
[pid 5274] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5274] memfd_create("syzkaller", 0) = 3
[pid 5274] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5274] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5274] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5274] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.373669][ T5272] loop0: detected capacity change from 0 to 512
[ 64.382160][ T5272] EXT4-fs: Ignoring removed oldalloc option
[ 64.388807][ T5272] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.398979][ T5272] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.407120][ T5272] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5274] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5274] close(3) = 0
[pid 5274] mkdir("./file0", 0777) = 0
[pid 5274] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5274] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5274] chdir("./file0") = 0
[pid 5274] ioctl(4, LOOP_CLR_FD) = 0
[pid 5274] close(4) = 0
[pid 5274] exit_group(0) = ?
[pid 5274] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5274, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./101", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./101", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./101/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./101/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./101/binderfs") = 0
umount2("./101/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./101/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./101/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./101/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./101/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./101/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./101") = 0
mkdir("./102", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5276
./strace-static-x86_64: Process 5276 attached
[pid 5276] chdir("./102") = 0
[pid 5276] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5276] setpgid(0, 0) = 0
[pid 5276] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5276] write(3, "1000", 4) = 4
[pid 5276] close(3) = 0
[pid 5276] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5276] memfd_create("syzkaller", 0) = 3
[pid 5276] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5276] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5276] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5276] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.449192][ T5274] loop0: detected capacity change from 0 to 512
[ 64.457002][ T5274] EXT4-fs: Ignoring removed oldalloc option
[ 64.463668][ T5274] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.473923][ T5274] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.482141][ T5274] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5276] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5276] close(3) = 0
[pid 5276] mkdir("./file0", 0777) = 0
[pid 5276] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5276] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5276] chdir("./file0") = 0
[pid 5276] ioctl(4, LOOP_CLR_FD) = 0
[pid 5276] close(4) = 0
[pid 5276] exit_group(0) = ?
[pid 5276] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5276, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
umount2("./102", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./102", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./102/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./102/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./102/binderfs") = 0
umount2("./102/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./102/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./102/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./102/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./102/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./102/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./102") = 0
mkdir("./103", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5278
./strace-static-x86_64: Process 5278 attached
[pid 5278] chdir("./103") = 0
[pid 5278] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5278] setpgid(0, 0) = 0
[pid 5278] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5278] write(3, "1000", 4) = 4
[pid 5278] close(3) = 0
[pid 5278] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5278] memfd_create("syzkaller", 0) = 3
[pid 5278] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5278] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5278] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5278] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.518745][ T5276] loop0: detected capacity change from 0 to 512
[ 64.519867][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 64.526833][ T5276] EXT4-fs: Ignoring removed oldalloc option
[ 64.541755][ T5276] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.552163][ T5276] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.560098][ T5276] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5278] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5278] close(3) = 0
[pid 5278] mkdir("./file0", 0777) = 0
[pid 5278] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5278] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5278] chdir("./file0") = 0
[pid 5278] ioctl(4, LOOP_CLR_FD) = 0
[pid 5278] close(4) = 0
[pid 5278] exit_group(0) = ?
[pid 5278] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5278, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./103", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./103", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./103/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./103/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./103/binderfs") = 0
umount2("./103/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./103/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./103/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./103/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./103/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./103/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./103") = 0
mkdir("./104", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5280
./strace-static-x86_64: Process 5280 attached
[pid 5280] chdir("./104") = 0
[pid 5280] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5280] setpgid(0, 0) = 0
[pid 5280] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5280] write(3, "1000", 4) = 4
[pid 5280] close(3) = 0
[pid 5280] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5280] memfd_create("syzkaller", 0) = 3
[pid 5280] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5280] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5280] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5280] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.592094][ T5278] loop0: detected capacity change from 0 to 512
[ 64.595698][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 64.599659][ T5278] EXT4-fs: Ignoring removed oldalloc option
[ 64.614731][ T5278] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.624470][ T5278] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.632184][ T5278] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5280] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5280] close(3) = 0
[pid 5280] mkdir("./file0", 0777) = 0
[pid 5280] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5280] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5280] chdir("./file0") = 0
[pid 5280] ioctl(4, LOOP_CLR_FD) = 0
[pid 5280] close(4) = 0
[pid 5280] exit_group(0) = ?
[pid 5280] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5280, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
umount2("./104", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./104", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./104/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./104/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./104/binderfs") = 0
umount2("./104/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./104/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./104/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./104/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./104/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./104/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./104") = 0
mkdir("./105", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5282
./strace-static-x86_64: Process 5282 attached
[pid 5282] chdir("./105") = 0
[pid 5282] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5282] setpgid(0, 0) = 0
[pid 5282] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5282] write(3, "1000", 4) = 4
[pid 5282] close(3) = 0
[pid 5282] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5282] memfd_create("syzkaller", 0) = 3
[pid 5282] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5282] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5282] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5282] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.664411][ T5280] loop0: detected capacity change from 0 to 512
[ 64.668829][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 64.671953][ T5280] EXT4-fs: Ignoring removed oldalloc option
[ 64.686880][ T5280] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.696868][ T5280] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.704798][ T5280] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5282] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5282] close(3) = 0
[pid 5282] mkdir("./file0", 0777) = 0
[pid 5282] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5282] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5282] chdir("./file0") = 0
[pid 5282] ioctl(4, LOOP_CLR_FD) = 0
[pid 5282] close(4) = 0
[pid 5282] exit_group(0) = ?
[pid 5282] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5282, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./105", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./105", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./105/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./105/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./105/binderfs") = 0
umount2("./105/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./105/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./105/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./105/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./105/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./105/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./105") = 0
mkdir("./106", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5284
./strace-static-x86_64: Process 5284 attached
[pid 5284] chdir("./106") = 0
[pid 5284] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5284] setpgid(0, 0) = 0
[pid 5284] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5284] write(3, "1000", 4) = 4
[pid 5284] close(3) = 0
[ 64.732481][ T5282] loop0: detected capacity change from 0 to 512
[ 64.736513][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 64.740130][ T5282] EXT4-fs: Ignoring removed oldalloc option
[ 64.755356][ T5282] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.765057][ T5282] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.773308][ T5282] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5284] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5284] memfd_create("syzkaller", 0) = 3
[pid 5284] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5284] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5284] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5284] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5284] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5284] close(3) = 0
[pid 5284] mkdir("./file0", 0777) = 0
[pid 5284] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5284] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5284] chdir("./file0") = 0
[pid 5284] ioctl(4, LOOP_CLR_FD) = 0
[pid 5284] close(4) = 0
[pid 5284] exit_group(0) = ?
[pid 5284] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5284, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./106", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./106", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./106/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./106/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./106/binderfs") = 0
umount2("./106/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./106/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./106/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./106/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./106/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./106/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./106") = 0
mkdir("./107", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5286
./strace-static-x86_64: Process 5286 attached
[pid 5286] chdir("./107") = 0
[pid 5286] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5286] setpgid(0, 0) = 0
[pid 5286] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5286] write(3, "1000", 4) = 4
[pid 5286] close(3) = 0
[pid 5286] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5286] memfd_create("syzkaller", 0) = 3
[pid 5286] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5286] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5286] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5286] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.817568][ T5284] loop0: detected capacity change from 0 to 512
[ 64.825513][ T5284] EXT4-fs: Ignoring removed oldalloc option
[ 64.832076][ T5284] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.842460][ T5284] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.850210][ T5284] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5286] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5286] close(3) = 0
[pid 5286] mkdir("./file0", 0777) = 0
[pid 5286] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5286] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5286] chdir("./file0") = 0
[pid 5286] ioctl(4, LOOP_CLR_FD) = 0
[pid 5286] close(4) = 0
[pid 5286] exit_group(0) = ?
[pid 5286] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5286, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./107", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./107", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./107/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./107/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./107/binderfs") = 0
umount2("./107/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./107/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./107/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./107/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./107/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./107/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./107") = 0
mkdir("./108", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5288
./strace-static-x86_64: Process 5288 attached
[pid 5288] chdir("./108") = 0
[pid 5288] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5288] setpgid(0, 0) = 0
[pid 5288] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5288] write(3, "1000", 4) = 4
[pid 5288] close(3) = 0
[pid 5288] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5288] memfd_create("syzkaller", 0) = 3
[pid 5288] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5288] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5288] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5288] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.887220][ T5286] loop0: detected capacity change from 0 to 512
[ 64.894878][ T5286] EXT4-fs: Ignoring removed oldalloc option
[ 64.901707][ T5286] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.911836][ T5286] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.919510][ T5286] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5288] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5288] close(3) = 0
[pid 5288] mkdir("./file0", 0777) = 0
[pid 5288] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5288] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5288] chdir("./file0") = 0
[pid 5288] ioctl(4, LOOP_CLR_FD) = 0
[pid 5288] close(4) = 0
[pid 5288] exit_group(0) = ?
[pid 5288] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5288, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./108", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./108", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./108/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./108/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./108/binderfs") = 0
umount2("./108/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./108/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./108/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./108/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./108/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./108/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./108") = 0
mkdir("./109", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5290
./strace-static-x86_64: Process 5290 attached
[pid 5290] chdir("./109") = 0
[pid 5290] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5290] setpgid(0, 0) = 0
[pid 5290] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5290] write(3, "1000", 4) = 4
[pid 5290] close(3) = 0
[pid 5290] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5290] memfd_create("syzkaller", 0) = 3
[pid 5290] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5290] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5290] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 64.967691][ T5288] loop0: detected capacity change from 0 to 512
[ 64.975551][ T5288] EXT4-fs: Ignoring removed oldalloc option
[ 64.982069][ T5288] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 64.991806][ T5288] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 64.999554][ T5288] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5290] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5290] close(3) = 0
[pid 5290] mkdir("./file0", 0777) = 0
[pid 5290] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5290] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5290] chdir("./file0") = 0
[pid 5290] ioctl(4, LOOP_CLR_FD) = 0
[pid 5290] close(4) = 0
[pid 5290] exit_group(0) = ?
[pid 5290] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5290, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./109", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./109", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./109/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./109/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./109/binderfs") = 0
umount2("./109/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./109/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./109/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./109/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./109/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./109/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./109") = 0
mkdir("./110", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5292
./strace-static-x86_64: Process 5292 attached
[pid 5292] chdir("./110") = 0
[pid 5292] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5292] setpgid(0, 0) = 0
[pid 5292] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5292] write(3, "1000", 4) = 4
[pid 5292] close(3) = 0
[pid 5292] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5292] memfd_create("syzkaller", 0) = 3
[pid 5292] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5292] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5292] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5292] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.041399][ T5290] loop0: detected capacity change from 0 to 512
[ 65.048908][ T5290] EXT4-fs: Ignoring removed oldalloc option
[ 65.055671][ T5290] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.065415][ T5290] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.073666][ T5290] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5292] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5292] close(3) = 0
[pid 5292] mkdir("./file0", 0777) = 0
[pid 5292] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5292] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5292] chdir("./file0") = 0
[pid 5292] ioctl(4, LOOP_CLR_FD) = 0
[pid 5292] close(4) = 0
[pid 5292] exit_group(0) = ?
[pid 5292] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5292, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./110", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./110", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./110/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./110/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./110/binderfs") = 0
umount2("./110/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./110/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./110/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./110/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./110/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./110/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./110") = 0
mkdir("./111", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5294 attached
, child_tidptr=0x55555704b5d0) = 5294
[pid 5294] chdir("./111") = 0
[pid 5294] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5294] setpgid(0, 0) = 0
[pid 5294] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5294] write(3, "1000", 4) = 4
[pid 5294] close(3) = 0
[pid 5294] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5294] memfd_create("syzkaller", 0) = 3
[pid 5294] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5294] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5294] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5294] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.114464][ T5292] loop0: detected capacity change from 0 to 512
[ 65.122027][ T5292] EXT4-fs: Ignoring removed oldalloc option
[ 65.128654][ T5292] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.139012][ T5292] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.146705][ T5292] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5294] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5294] close(3) = 0
[pid 5294] mkdir("./file0", 0777) = 0
[pid 5294] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5294] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5294] chdir("./file0") = 0
[pid 5294] ioctl(4, LOOP_CLR_FD) = 0
[pid 5294] close(4) = 0
[pid 5294] exit_group(0) = ?
[pid 5294] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5294, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./111", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./111", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./111/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./111/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./111/binderfs") = 0
umount2("./111/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./111/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./111/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./111/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./111/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./111/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./111") = 0
mkdir("./112", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5296
./strace-static-x86_64: Process 5296 attached
[pid 5296] chdir("./112") = 0
[pid 5296] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5296] setpgid(0, 0) = 0
[pid 5296] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5296] write(3, "1000", 4) = 4
[pid 5296] close(3) = 0
[pid 5296] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5296] memfd_create("syzkaller", 0) = 3
[pid 5296] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5296] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5296] munmap(0x7fa8deb6c000, 262144) = 0
[ 65.191729][ T5294] loop0: detected capacity change from 0 to 512
[ 65.199519][ T5294] EXT4-fs: Ignoring removed oldalloc option
[ 65.206534][ T5294] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.216312][ T5294] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.224313][ T5294] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5296] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5296] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5296] close(3) = 0
[pid 5296] mkdir("./file0", 0777) = 0
[pid 5296] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5296] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5296] chdir("./file0") = 0
[pid 5296] ioctl(4, LOOP_CLR_FD) = 0
[pid 5296] close(4) = 0
[pid 5296] exit_group(0) = ?
[pid 5296] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5296, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./112", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./112", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./112/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./112/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./112/binderfs") = 0
umount2("./112/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./112/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./112/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./112/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./112/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./112/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./112") = 0
mkdir("./113", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5298
./strace-static-x86_64: Process 5298 attached
[pid 5298] chdir("./113") = 0
[pid 5298] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5298] setpgid(0, 0) = 0
[pid 5298] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5298] write(3, "1000", 4) = 4
[pid 5298] close(3) = 0
[pid 5298] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5298] memfd_create("syzkaller", 0) = 3
[pid 5298] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5298] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5298] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5298] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.259470][ T5296] loop0: detected capacity change from 0 to 512
[ 65.266999][ T5296] EXT4-fs: Ignoring removed oldalloc option
[ 65.273384][ T5296] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.283333][ T5296] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.291558][ T5296] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5298] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5298] close(3) = 0
[pid 5298] mkdir("./file0", 0777) = 0
[pid 5298] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5298] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5298] chdir("./file0") = 0
[pid 5298] ioctl(4, LOOP_CLR_FD) = 0
[pid 5298] close(4) = 0
[pid 5298] exit_group(0) = ?
[pid 5298] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5298, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./113", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./113", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./113/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./113/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./113/binderfs") = 0
umount2("./113/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./113/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./113/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./113/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./113/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./113/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./113") = 0
mkdir("./114", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5300
./strace-static-x86_64: Process 5300 attached
[pid 5300] chdir("./114") = 0
[pid 5300] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5300] setpgid(0, 0) = 0
[pid 5300] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5300] write(3, "1000", 4) = 4
[pid 5300] close(3) = 0
[pid 5300] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5300] memfd_create("syzkaller", 0) = 3
[pid 5300] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5300] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5300] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5300] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.325884][ T5298] loop0: detected capacity change from 0 to 512
[ 65.333548][ T5298] EXT4-fs: Ignoring removed oldalloc option
[ 65.340151][ T5298] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.350145][ T5298] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.358529][ T5298] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5300] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5300] close(3) = 0
[pid 5300] mkdir("./file0", 0777) = 0
[pid 5300] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5300] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5300] chdir("./file0") = 0
[pid 5300] ioctl(4, LOOP_CLR_FD) = 0
[pid 5300] close(4) = 0
[pid 5300] exit_group(0) = ?
[pid 5300] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5300, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./114", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./114", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./114/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./114/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./114/binderfs") = 0
umount2("./114/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./114/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./114/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./114/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./114/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./114/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./114") = 0
mkdir("./115", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5302
./strace-static-x86_64: Process 5302 attached
[pid 5302] chdir("./115") = 0
[pid 5302] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5302] setpgid(0, 0) = 0
[pid 5302] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5302] write(3, "1000", 4) = 4
[pid 5302] close(3) = 0
[pid 5302] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5302] memfd_create("syzkaller", 0) = 3
[pid 5302] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5302] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5302] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.394225][ T5300] loop0: detected capacity change from 0 to 512
[ 65.402018][ T5300] EXT4-fs: Ignoring removed oldalloc option
[ 65.408531][ T5300] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.418890][ T5300] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.427065][ T5300] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5302] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5302] close(3) = 0
[pid 5302] mkdir("./file0", 0777) = 0
[pid 5302] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5302] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5302] chdir("./file0") = 0
[pid 5302] ioctl(4, LOOP_CLR_FD) = 0
[pid 5302] close(4) = 0
[pid 5302] exit_group(0) = ?
[pid 5302] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5302, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./115", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./115", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./115/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./115/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./115/binderfs") = 0
umount2("./115/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./115/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./115/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./115/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./115/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./115/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./115") = 0
mkdir("./116", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5304
./strace-static-x86_64: Process 5304 attached
[pid 5304] chdir("./116") = 0
[pid 5304] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5304] setpgid(0, 0) = 0
[pid 5304] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5304] write(3, "1000", 4) = 4
[pid 5304] close(3) = 0
[pid 5304] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5304] memfd_create("syzkaller", 0) = 3
[pid 5304] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5304] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5304] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5304] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.461446][ T5302] loop0: detected capacity change from 0 to 512
[ 65.469135][ T5302] EXT4-fs: Ignoring removed oldalloc option
[ 65.475778][ T5302] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.486163][ T5302] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.494545][ T5302] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5304] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5304] close(3) = 0
[pid 5304] mkdir("./file0", 0777) = 0
[pid 5304] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5304] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5304] chdir("./file0") = 0
[pid 5304] ioctl(4, LOOP_CLR_FD) = 0
[pid 5304] close(4) = 0
[pid 5304] exit_group(0) = ?
[pid 5304] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5304, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./116", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./116", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./116/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./116/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./116/binderfs") = 0
umount2("./116/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./116/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./116/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./116/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./116/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./116/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./116") = 0
mkdir("./117", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5306
./strace-static-x86_64: Process 5306 attached
[pid 5306] chdir("./117") = 0
[pid 5306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5306] setpgid(0, 0) = 0
[pid 5306] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5306] write(3, "1000", 4) = 4
[pid 5306] close(3) = 0
[pid 5306] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5306] memfd_create("syzkaller", 0) = 3
[pid 5306] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5306] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5306] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5306] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.530253][ T5304] loop0: detected capacity change from 0 to 512
[ 65.537881][ T5304] EXT4-fs: Ignoring removed oldalloc option
[ 65.544773][ T5304] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.554583][ T5304] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.562621][ T5304] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5306] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5306] close(3) = 0
[pid 5306] mkdir("./file0", 0777) = 0
[pid 5306] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5306] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5306] chdir("./file0") = 0
[pid 5306] ioctl(4, LOOP_CLR_FD) = 0
[pid 5306] close(4) = 0
[pid 5306] exit_group(0) = ?
[pid 5306] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5306, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./117", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./117", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./117/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./117/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./117/binderfs") = 0
umount2("./117/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./117/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./117/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./117/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./117/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./117/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./117") = 0
mkdir("./118", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5308
./strace-static-x86_64: Process 5308 attached
[pid 5308] chdir("./118") = 0
[pid 5308] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5308] setpgid(0, 0) = 0
[pid 5308] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5308] write(3, "1000", 4) = 4
[pid 5308] close(3) = 0
[pid 5308] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5308] memfd_create("syzkaller", 0) = 3
[pid 5308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5308] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5308] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.597809][ T5306] loop0: detected capacity change from 0 to 512
[ 65.605606][ T5306] EXT4-fs: Ignoring removed oldalloc option
[ 65.612463][ T5306] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.622316][ T5306] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.630017][ T5306] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5308] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5308] close(3) = 0
[pid 5308] mkdir("./file0", 0777) = 0
[pid 5308] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5308] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5308] chdir("./file0") = 0
[pid 5308] ioctl(4, LOOP_CLR_FD) = 0
[pid 5308] close(4) = 0
[pid 5308] exit_group(0) = ?
[pid 5308] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5308, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./118", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./118", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./118/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./118/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./118/binderfs") = 0
umount2("./118/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./118/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./118/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./118/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./118/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./118/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./118") = 0
mkdir("./119", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5310
./strace-static-x86_64: Process 5310 attached
[pid 5310] chdir("./119") = 0
[pid 5310] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5310] setpgid(0, 0) = 0
[pid 5310] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5310] write(3, "1000", 4) = 4
[pid 5310] close(3) = 0
[pid 5310] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5310] memfd_create("syzkaller", 0) = 3
[pid 5310] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5310] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5310] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5310] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.659432][ T5308] loop0: detected capacity change from 0 to 512
[ 65.667294][ T5308] EXT4-fs: Ignoring removed oldalloc option
[ 65.674305][ T5308] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.683962][ T5308] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.691854][ T5308] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5310] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5310] close(3) = 0
[pid 5310] mkdir("./file0", 0777) = 0
[pid 5310] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5310] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5310] chdir("./file0") = 0
[pid 5310] ioctl(4, LOOP_CLR_FD) = 0
[pid 5310] close(4) = 0
[pid 5310] exit_group(0) = ?
[pid 5310] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5310, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./119", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./119", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./119/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./119/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./119/binderfs") = 0
umount2("./119/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./119/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./119/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./119/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./119/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./119/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./119") = 0
mkdir("./120", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5312
./strace-static-x86_64: Process 5312 attached
[pid 5312] chdir("./120") = 0
[pid 5312] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5312] setpgid(0, 0) = 0
[pid 5312] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5312] write(3, "1000", 4) = 4
[pid 5312] close(3) = 0
[pid 5312] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5312] memfd_create("syzkaller", 0) = 3
[pid 5312] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5312] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5312] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5312] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.730027][ T5310] loop0: detected capacity change from 0 to 512
[ 65.737624][ T5310] EXT4-fs: Ignoring removed oldalloc option
[ 65.744493][ T5310] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.754566][ T5310] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.763330][ T5310] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5312] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5312] close(3) = 0
[pid 5312] mkdir("./file0", 0777) = 0
[pid 5312] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5312] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5312] chdir("./file0") = 0
[pid 5312] ioctl(4, LOOP_CLR_FD) = 0
[pid 5312] close(4) = 0
[pid 5312] exit_group(0) = ?
[pid 5312] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5312, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./120", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./120", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./120/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./120/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./120/binderfs") = 0
umount2("./120/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./120/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./120/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./120/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./120/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./120/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./120") = 0
mkdir("./121", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5314
./strace-static-x86_64: Process 5314 attached
[pid 5314] chdir("./121") = 0
[pid 5314] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5314] setpgid(0, 0) = 0
[pid 5314] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5314] write(3, "1000", 4) = 4
[pid 5314] close(3) = 0
[pid 5314] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5314] memfd_create("syzkaller", 0) = 3
[pid 5314] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5314] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5314] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5314] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.798799][ T5312] loop0: detected capacity change from 0 to 512
[ 65.807147][ T5312] EXT4-fs: Ignoring removed oldalloc option
[ 65.814054][ T5312] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.823916][ T5312] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.832126][ T5312] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5314] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5314] close(3) = 0
[pid 5314] mkdir("./file0", 0777) = 0
[pid 5314] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5314] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5314] chdir("./file0") = 0
[pid 5314] ioctl(4, LOOP_CLR_FD) = 0
[pid 5314] close(4) = 0
[pid 5314] exit_group(0) = ?
[pid 5314] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5314, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./121", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./121", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./121/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./121/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./121/binderfs") = 0
umount2("./121/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./121/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./121/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./121/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./121/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./121/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./121") = 0
mkdir("./122", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5316
./strace-static-x86_64: Process 5316 attached
[pid 5316] chdir("./122") = 0
[pid 5316] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5316] setpgid(0, 0) = 0
[pid 5316] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5316] write(3, "1000", 4) = 4
[pid 5316] close(3) = 0
[pid 5316] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5316] memfd_create("syzkaller", 0) = 3
[pid 5316] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5316] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5316] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5316] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.862669][ T5314] loop0: detected capacity change from 0 to 512
[ 65.870198][ T5314] EXT4-fs: Ignoring removed oldalloc option
[ 65.876861][ T5314] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.886560][ T5314] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.894573][ T5314] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5316] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5316] close(3) = 0
[pid 5316] mkdir("./file0", 0777) = 0
[pid 5316] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5316] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5316] chdir("./file0") = 0
[pid 5316] ioctl(4, LOOP_CLR_FD) = 0
[pid 5316] close(4) = 0
[pid 5316] exit_group(0) = ?
[pid 5316] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5316, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./122", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./122", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./122/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./122/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./122/binderfs") = 0
umount2("./122/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./122/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./122/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./122/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./122/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./122/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./122") = 0
mkdir("./123", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5318
./strace-static-x86_64: Process 5318 attached
[pid 5318] chdir("./123") = 0
[pid 5318] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5318] setpgid(0, 0) = 0
[pid 5318] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5318] write(3, "1000", 4) = 4
[pid 5318] close(3) = 0
[pid 5318] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5318] memfd_create("syzkaller", 0) = 3
[pid 5318] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5318] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5318] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5318] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 65.931693][ T5316] loop0: detected capacity change from 0 to 512
[ 65.932519][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 65.940258][ T5316] EXT4-fs: Ignoring removed oldalloc option
[ 65.954176][ T5316] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 65.964081][ T5316] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 65.971962][ T5316] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5318] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5318] close(3) = 0
[pid 5318] mkdir("./file0", 0777) = 0
[pid 5318] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5318] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5318] chdir("./file0") = 0
[pid 5318] ioctl(4, LOOP_CLR_FD) = 0
[pid 5318] close(4) = 0
[pid 5318] exit_group(0) = ?
[pid 5318] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5318, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./123", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./123", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./123/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./123/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./123/binderfs") = 0
umount2("./123/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./123/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./123/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./123/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./123/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./123/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./123") = 0
mkdir("./124", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5320
./strace-static-x86_64: Process 5320 attached
[pid 5320] chdir("./124") = 0
[pid 5320] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5320] setpgid(0, 0) = 0
[pid 5320] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5320] write(3, "1000", 4) = 4
[pid 5320] close(3) = 0
[pid 5320] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5320] memfd_create("syzkaller", 0) = 3
[pid 5320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5320] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5320] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.007101][ T5318] loop0: detected capacity change from 0 to 512
[ 66.014776][ T5318] EXT4-fs: Ignoring removed oldalloc option
[ 66.021566][ T5318] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.031653][ T5318] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.039720][ T5318] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5320] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5320] close(3) = 0
[pid 5320] mkdir("./file0", 0777) = 0
[pid 5320] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5320] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5320] chdir("./file0") = 0
[pid 5320] ioctl(4, LOOP_CLR_FD) = 0
[pid 5320] close(4) = 0
[pid 5320] exit_group(0) = ?
[pid 5320] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5320, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./124", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./124", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./124/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./124/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./124/binderfs") = 0
umount2("./124/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./124/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./124/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./124/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./124/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./124/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./124") = 0
mkdir("./125", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5322
./strace-static-x86_64: Process 5322 attached
[ 66.081423][ T5320] loop0: detected capacity change from 0 to 512
[ 66.084348][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 66.090051][ T5320] EXT4-fs: Ignoring removed oldalloc option
[ 66.104171][ T5320] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.113981][ T5320] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.122083][ T5320] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5322] chdir("./125") = 0
[pid 5322] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5322] setpgid(0, 0) = 0
[pid 5322] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5322] write(3, "1000", 4) = 4
[pid 5322] close(3) = 0
[pid 5322] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5322] memfd_create("syzkaller", 0) = 3
[pid 5322] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5322] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5322] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5322] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5322] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5322] close(3) = 0
[pid 5322] mkdir("./file0", 0777) = 0
[pid 5322] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5322] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5322] chdir("./file0") = 0
[pid 5322] ioctl(4, LOOP_CLR_FD) = 0
[pid 5322] close(4) = 0
[pid 5322] exit_group(0) = ?
[pid 5322] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5322, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./125", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./125", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./125/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./125/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./125/binderfs") = 0
umount2("./125/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./125/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./125/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./125/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./125/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./125/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./125") = 0
mkdir("./126", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5324
./strace-static-x86_64: Process 5324 attached
[pid 5324] chdir("./126") = 0
[pid 5324] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 66.173558][ T5322] loop0: detected capacity change from 0 to 512
[ 66.182332][ T5322] EXT4-fs: Ignoring removed oldalloc option
[ 66.188746][ T5322] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.198734][ T5322] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.206771][ T5322] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5324] setpgid(0, 0) = 0
[pid 5324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5324] write(3, "1000", 4) = 4
[pid 5324] close(3) = 0
[pid 5324] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5324] memfd_create("syzkaller", 0) = 3
[pid 5324] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5324] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5324] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5324] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5324] close(3) = 0
[pid 5324] mkdir("./file0", 0777) = 0
[pid 5324] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5324] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5324] chdir("./file0") = 0
[pid 5324] ioctl(4, LOOP_CLR_FD) = 0
[pid 5324] close(4) = 0
[pid 5324] exit_group(0) = ?
[pid 5324] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5324, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./126", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./126", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./126/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./126/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./126/binderfs") = 0
umount2("./126/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./126/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./126/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./126/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./126/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./126/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./126") = 0
mkdir("./127", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5326
./strace-static-x86_64: Process 5326 attached
[pid 5326] chdir("./127") = 0
[pid 5326] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5326] setpgid(0, 0) = 0
[pid 5326] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5326] write(3, "1000", 4) = 4
[pid 5326] close(3) = 0
[pid 5326] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5326] memfd_create("syzkaller", 0) = 3
[pid 5326] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5326] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5326] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5326] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.264934][ T5324] loop0: detected capacity change from 0 to 512
[ 66.273238][ T5324] EXT4-fs: Ignoring removed oldalloc option
[ 66.279681][ T5324] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.289386][ T5324] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.297708][ T5324] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5326] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5326] close(3) = 0
[pid 5326] mkdir("./file0", 0777) = 0
[pid 5326] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5326] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5326] chdir("./file0") = 0
[pid 5326] ioctl(4, LOOP_CLR_FD) = 0
[pid 5326] close(4) = 0
[pid 5326] exit_group(0) = ?
[pid 5326] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5326, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./127", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./127", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./127/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./127/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./127/binderfs") = 0
umount2("./127/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./127/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./127/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./127/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./127/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./127/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./127") = 0
mkdir("./128", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5328 attached
, child_tidptr=0x55555704b5d0) = 5328
[pid 5328] chdir("./128") = 0
[pid 5328] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5328] setpgid(0, 0) = 0
[pid 5328] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5328] write(3, "1000", 4) = 4
[pid 5328] close(3) = 0
[pid 5328] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5328] memfd_create("syzkaller", 0) = 3
[pid 5328] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5328] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5328] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5328] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.333395][ T5326] loop0: detected capacity change from 0 to 512
[ 66.341167][ T5326] EXT4-fs: Ignoring removed oldalloc option
[ 66.347809][ T5326] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.357969][ T5326] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.366402][ T5326] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5328] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5328] close(3) = 0
[pid 5328] mkdir("./file0", 0777) = 0
[pid 5328] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5328] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5328] chdir("./file0") = 0
[pid 5328] ioctl(4, LOOP_CLR_FD) = 0
[pid 5328] close(4) = 0
[pid 5328] exit_group(0) = ?
[pid 5328] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5328, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./128", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./128", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./128/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./128/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./128/binderfs") = 0
umount2("./128/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./128/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./128/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./128/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./128/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./128/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./128") = 0
mkdir("./129", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5330
./strace-static-x86_64: Process 5330 attached
[pid 5330] chdir("./129") = 0
[pid 5330] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5330] setpgid(0, 0) = 0
[pid 5330] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5330] write(3, "1000", 4) = 4
[pid 5330] close(3) = 0
[pid 5330] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5330] memfd_create("syzkaller", 0) = 3
[pid 5330] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5330] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5330] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5330] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.407975][ T5328] loop0: detected capacity change from 0 to 512
[ 66.416608][ T5328] EXT4-fs: Ignoring removed oldalloc option
[ 66.423349][ T5328] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.432928][ T5328] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.440558][ T5328] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5330] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5330] close(3) = 0
[pid 5330] mkdir("./file0", 0777) = 0
[pid 5330] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5330] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5330] chdir("./file0") = 0
[pid 5330] ioctl(4, LOOP_CLR_FD) = 0
[pid 5330] close(4) = 0
[pid 5330] exit_group(0) = ?
[pid 5330] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5330, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./129", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./129", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./129/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./129/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./129/binderfs") = 0
umount2("./129/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./129/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./129/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./129/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./129/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./129/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./129") = 0
mkdir("./130", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5332
./strace-static-x86_64: Process 5332 attached
[pid 5332] chdir("./130") = 0
[pid 5332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5332] setpgid(0, 0) = 0
[pid 5332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5332] write(3, "1000", 4) = 4
[pid 5332] close(3) = 0
[pid 5332] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5332] memfd_create("syzkaller", 0) = 3
[pid 5332] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5332] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5332] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5332] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.468738][ T5330] loop0: detected capacity change from 0 to 512
[ 66.476459][ T5330] EXT4-fs: Ignoring removed oldalloc option
[ 66.483573][ T5330] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.493569][ T5330] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.502311][ T5330] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5332] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5332] close(3) = 0
[pid 5332] mkdir("./file0", 0777) = 0
[pid 5332] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5332] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5332] chdir("./file0") = 0
[pid 5332] ioctl(4, LOOP_CLR_FD) = 0
[pid 5332] close(4) = 0
[pid 5332] exit_group(0) = ?
[pid 5332] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5332, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./130", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./130", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./130/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./130/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./130/binderfs") = 0
umount2("./130/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./130/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./130/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./130/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./130/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./130/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./130") = 0
mkdir("./131", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5334
./strace-static-x86_64: Process 5334 attached
[pid 5334] chdir("./131") = 0
[pid 5334] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5334] setpgid(0, 0) = 0
[pid 5334] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5334] write(3, "1000", 4) = 4
[pid 5334] close(3) = 0
[pid 5334] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5334] memfd_create("syzkaller", 0) = 3
[pid 5334] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5334] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5334] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5334] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.536228][ T5332] loop0: detected capacity change from 0 to 512
[ 66.544092][ T5332] EXT4-fs: Ignoring removed oldalloc option
[ 66.550739][ T5332] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.560683][ T5332] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.569148][ T5332] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5334] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5334] close(3) = 0
[pid 5334] mkdir("./file0", 0777) = 0
[pid 5334] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5334] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5334] chdir("./file0") = 0
[pid 5334] ioctl(4, LOOP_CLR_FD) = 0
[pid 5334] close(4) = 0
[pid 5334] exit_group(0) = ?
[pid 5334] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5334, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./131", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./131", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
[ 66.598889][ T5334] loop0: detected capacity change from 0 to 512
[ 66.603254][ T5070] buffer_io_error: 7 callbacks suppressed
[ 66.603266][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 66.606503][ T5334] EXT4-fs: Ignoring removed oldalloc option
[ 66.625396][ T5334] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.635103][ T5334] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.643620][ T5334] EXT4-fs (loop0): 1 truncate cleaned up
umount2("./131/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./131/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./131/binderfs") = 0
umount2("./131/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./131/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./131/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./131/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./131/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./131/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./131") = 0
mkdir("./132", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5336
./strace-static-x86_64: Process 5336 attached
[pid 5336] chdir("./132") = 0
[pid 5336] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5336] setpgid(0, 0) = 0
[pid 5336] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5336] write(3, "1000", 4) = 4
[pid 5336] close(3) = 0
[pid 5336] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5336] memfd_create("syzkaller", 0) = 3
[pid 5336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5336] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5336] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5336] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5336] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5336] close(3) = 0
[pid 5336] mkdir("./file0", 0777) = 0
[pid 5336] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5336] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5336] chdir("./file0") = 0
[pid 5336] ioctl(4, LOOP_CLR_FD) = 0
[pid 5336] close(4) = 0
[pid 5336] exit_group(0) = ?
[pid 5336] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5336, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./132", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./132", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./132/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./132/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./132/binderfs") = 0
umount2("./132/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./132/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./132/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./132/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./132/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./132/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./132") = 0
mkdir("./133", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5338
./strace-static-x86_64: Process 5338 attached
[pid 5338] chdir("./133") = 0
[pid 5338] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5338] setpgid(0, 0) = 0
[pid 5338] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5338] write(3, "1000", 4) = 4
[pid 5338] close(3) = 0
[pid 5338] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5338] memfd_create("syzkaller", 0) = 3
[pid 5338] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5338] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 66.689497][ T5336] loop0: detected capacity change from 0 to 512
[ 66.697566][ T5336] EXT4-fs: Ignoring removed oldalloc option
[ 66.704412][ T5336] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.714191][ T5336] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.722095][ T5336] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5338] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5338] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5338] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5338] close(3) = 0
[pid 5338] mkdir("./file0", 0777) = 0
[pid 5338] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5338] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5338] chdir("./file0") = 0
[pid 5338] ioctl(4, LOOP_CLR_FD) = 0
[pid 5338] close(4) = 0
[pid 5338] exit_group(0) = ?
[pid 5338] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5338, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./133", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./133", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./133/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./133/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./133/binderfs") = 0
umount2("./133/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./133/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./133/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./133/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./133/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./133/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./133") = 0
mkdir("./134", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5340
./strace-static-x86_64: Process 5340 attached
[pid 5340] chdir("./134") = 0
[pid 5340] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5340] setpgid(0, 0) = 0
[pid 5340] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5340] write(3, "1000", 4) = 4
[pid 5340] close(3) = 0
[pid 5340] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5340] memfd_create("syzkaller", 0) = 3
[pid 5340] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 66.755548][ T5338] loop0: detected capacity change from 0 to 512
[ 66.765126][ T5338] EXT4-fs: Ignoring removed oldalloc option
[ 66.771997][ T5338] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.781800][ T5338] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.789441][ T5338] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5340] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5340] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5340] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5340] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5340] close(3) = 0
[pid 5340] mkdir("./file0", 0777) = 0
[pid 5340] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5340] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5340] chdir("./file0") = 0
[pid 5340] ioctl(4, LOOP_CLR_FD) = 0
[pid 5340] close(4) = 0
[pid 5340] exit_group(0) = ?
[pid 5340] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5340, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./134", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./134", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./134/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./134/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./134/binderfs") = 0
umount2("./134/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./134/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./134/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./134/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./134/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./134/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./134") = 0
mkdir("./135", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5342
./strace-static-x86_64: Process 5342 attached
[pid 5342] chdir("./135") = 0
[pid 5342] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5342] setpgid(0, 0) = 0
[pid 5342] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5342] write(3, "1000", 4) = 4
[pid 5342] close(3) = 0
[pid 5342] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5342] memfd_create("syzkaller", 0) = 3
[pid 5342] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5342] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5342] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5342] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 66.846719][ T5340] loop0: detected capacity change from 0 to 512
[ 66.855080][ T5340] EXT4-fs: Ignoring removed oldalloc option
[ 66.861806][ T5340] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.871792][ T5340] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.879490][ T5340] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5342] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5342] close(3) = 0
[pid 5342] mkdir("./file0", 0777) = 0
[pid 5342] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5342] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5342] chdir("./file0") = 0
[pid 5342] ioctl(4, LOOP_CLR_FD) = 0
[pid 5342] close(4) = 0
[pid 5342] exit_group(0) = ?
[pid 5342] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5342, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./135", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./135", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./135/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./135/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./135/binderfs") = 0
umount2("./135/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./135/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./135/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./135/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./135/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./135/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./135") = 0
mkdir("./136", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
[ 66.915536][ T5342] loop0: detected capacity change from 0 to 512
[ 66.923108][ T5342] EXT4-fs: Ignoring removed oldalloc option
[ 66.929868][ T5342] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 66.939866][ T5342] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 66.948731][ T5342] EXT4-fs (loop0): 1 truncate cleaned up
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5344
./strace-static-x86_64: Process 5344 attached
[pid 5344] chdir("./136") = 0
[pid 5344] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5344] setpgid(0, 0) = 0
[pid 5344] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5344] write(3, "1000", 4) = 4
[pid 5344] close(3) = 0
[pid 5344] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5344] memfd_create("syzkaller", 0) = 3
[pid 5344] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5344] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5344] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5344] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5344] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5344] close(3) = 0
[pid 5344] mkdir("./file0", 0777) = 0
[pid 5344] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5344] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5344] chdir("./file0") = 0
[pid 5344] ioctl(4, LOOP_CLR_FD) = 0
[pid 5344] close(4) = 0
[pid 5344] exit_group(0) = ?
[pid 5344] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5344, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./136", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./136", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./136/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./136/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./136/binderfs") = 0
umount2("./136/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./136/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./136/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./136/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./136/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./136/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./136") = 0
mkdir("./137", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5346
./strace-static-x86_64: Process 5346 attached
[pid 5346] chdir("./137") = 0
[pid 5346] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5346] setpgid(0, 0) = 0
[pid 5346] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5346] write(3, "1000", 4) = 4
[pid 5346] close(3) = 0
[pid 5346] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5346] memfd_create("syzkaller", 0) = 3
[pid 5346] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 67.009292][ T5344] loop0: detected capacity change from 0 to 512
[ 67.017802][ T5344] EXT4-fs: Ignoring removed oldalloc option
[ 67.024802][ T5344] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.035889][ T5344] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.044139][ T5344] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5346] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5346] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5346] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5346] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5346] close(3) = 0
[pid 5346] mkdir("./file0", 0777) = 0
[pid 5346] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5346] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5346] chdir("./file0") = 0
[pid 5346] ioctl(4, LOOP_CLR_FD) = 0
[pid 5346] close(4) = 0
[pid 5346] exit_group(0) = ?
[pid 5346] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5346, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./137", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./137", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./137/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./137/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./137/binderfs") = 0
umount2("./137/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./137/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./137/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./137/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./137/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./137/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./137") = 0
mkdir("./138", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
[ 67.075231][ T5346] loop0: detected capacity change from 0 to 512
[ 67.082764][ T5346] EXT4-fs: Ignoring removed oldalloc option
[ 67.090048][ T5346] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.099607][ T5346] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.108108][ T5346] EXT4-fs (loop0): 1 truncate cleaned up
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5348
./strace-static-x86_64: Process 5348 attached
[pid 5348] chdir("./138") = 0
[pid 5348] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5348] setpgid(0, 0) = 0
[pid 5348] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5348] write(3, "1000", 4) = 4
[pid 5348] close(3) = 0
[pid 5348] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5348] memfd_create("syzkaller", 0) = 3
[pid 5348] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5348] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5348] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5348] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5348] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5348] close(3) = 0
[pid 5348] mkdir("./file0", 0777) = 0
[pid 5348] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5348] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5348] chdir("./file0") = 0
[pid 5348] ioctl(4, LOOP_CLR_FD) = 0
[pid 5348] close(4) = 0
[pid 5348] exit_group(0) = ?
[pid 5348] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5348, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./138", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./138", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./138/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./138/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./138/binderfs") = 0
umount2("./138/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./138/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./138/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./138/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./138/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./138/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./138") = 0
mkdir("./139", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5350
./strace-static-x86_64: Process 5350 attached
[pid 5350] chdir("./139") = 0
[pid 5350] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5350] setpgid(0, 0) = 0
[pid 5350] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5350] write(3, "1000", 4) = 4
[pid 5350] close(3) = 0
[pid 5350] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5350] memfd_create("syzkaller", 0) = 3
[pid 5350] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 67.142868][ T5348] loop0: detected capacity change from 0 to 512
[ 67.150598][ T5348] EXT4-fs: Ignoring removed oldalloc option
[ 67.157660][ T5348] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.167596][ T5348] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.175722][ T5348] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5350] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5350] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5350] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5350] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5350] close(3) = 0
[pid 5350] mkdir("./file0", 0777) = 0
[pid 5350] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5350] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5350] chdir("./file0") = 0
[pid 5350] ioctl(4, LOOP_CLR_FD) = 0
[pid 5350] close(4) = 0
[pid 5350] exit_group(0) = ?
[pid 5350] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5350, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./139", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./139", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./139/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./139/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./139/binderfs") = 0
umount2("./139/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./139/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./139/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./139/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./139/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./139/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./139") = 0
mkdir("./140", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5352
./strace-static-x86_64: Process 5352 attached
[pid 5352] chdir("./140") = 0
[pid 5352] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5352] setpgid(0, 0) = 0
[pid 5352] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5352] write(3, "1000", 4) = 4
[pid 5352] close(3) = 0
[pid 5352] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5352] memfd_create("syzkaller", 0) = 3
[pid 5352] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5352] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5352] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5352] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.209800][ T5350] loop0: detected capacity change from 0 to 512
[ 67.217380][ T5350] EXT4-fs: Ignoring removed oldalloc option
[ 67.224223][ T5350] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.234872][ T5350] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.242736][ T5350] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5352] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5352] close(3) = 0
[pid 5352] mkdir("./file0", 0777) = 0
[pid 5352] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5352] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5352] chdir("./file0") = 0
[pid 5352] ioctl(4, LOOP_CLR_FD) = 0
[pid 5352] close(4) = 0
[pid 5352] exit_group(0) = ?
[pid 5352] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5352, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./140", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./140", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./140/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./140/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./140/binderfs") = 0
umount2("./140/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./140/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./140/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./140/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./140/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./140/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./140") = 0
mkdir("./141", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5354 attached
[pid 5354] chdir("./141"
[pid 5068] <... clone resumed>, child_tidptr=0x55555704b5d0) = 5354
[pid 5354] <... chdir resumed>) = 0
[pid 5354] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5354] setpgid(0, 0) = 0
[pid 5354] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5354] write(3, "1000", 4) = 4
[pid 5354] close(3) = 0
[pid 5354] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5354] memfd_create("syzkaller", 0) = 3
[pid 5354] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5354] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5354] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5354] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.271243][ T5352] loop0: detected capacity change from 0 to 512
[ 67.279495][ T5352] EXT4-fs: Ignoring removed oldalloc option
[ 67.286214][ T5352] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.296149][ T5352] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.305225][ T5352] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5354] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5354] close(3) = 0
[pid 5354] mkdir("./file0", 0777) = 0
[pid 5354] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5354] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5354] chdir("./file0") = 0
[pid 5354] ioctl(4, LOOP_CLR_FD) = 0
[pid 5354] close(4) = 0
[pid 5354] exit_group(0) = ?
[pid 5354] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5354, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
umount2("./141", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./141", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./141/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./141/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./141/binderfs") = 0
umount2("./141/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./141/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./141/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./141/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./141/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./141/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./141") = 0
mkdir("./142", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5356
./strace-static-x86_64: Process 5356 attached
[pid 5356] chdir("./142") = 0
[pid 5356] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5356] setpgid(0, 0) = 0
[pid 5356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5356] write(3, "1000", 4) = 4
[pid 5356] close(3) = 0
[pid 5356] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5356] memfd_create("syzkaller", 0) = 3
[pid 5356] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 67.339257][ T5354] loop0: detected capacity change from 0 to 512
[ 67.347309][ T5354] EXT4-fs: Ignoring removed oldalloc option
[ 67.354003][ T5354] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.364042][ T5354] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.372373][ T5354] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5356] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5356] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5356] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5356] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5356] close(3) = 0
[pid 5356] mkdir("./file0", 0777) = 0
[pid 5356] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5356] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5356] chdir("./file0") = 0
[pid 5356] ioctl(4, LOOP_CLR_FD) = 0
[pid 5356] close(4) = 0
[pid 5356] exit_group(0) = ?
[pid 5356] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5356, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./142", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./142", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./142/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./142/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./142/binderfs") = 0
umount2("./142/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./142/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./142/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./142/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./142/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./142/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./142") = 0
mkdir("./143", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5358
./strace-static-x86_64: Process 5358 attached
[pid 5358] chdir("./143") = 0
[pid 5358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5358] setpgid(0, 0) = 0
[pid 5358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5358] write(3, "1000", 4) = 4
[pid 5358] close(3) = 0
[pid 5358] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5358] memfd_create("syzkaller", 0) = 3
[pid 5358] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 67.404017][ T5356] loop0: detected capacity change from 0 to 512
[ 67.411967][ T5356] EXT4-fs: Ignoring removed oldalloc option
[ 67.418412][ T5356] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.429019][ T5356] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.437384][ T5356] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5358] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5358] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5358] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5358] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5358] close(3) = 0
[pid 5358] mkdir("./file0", 0777) = 0
[pid 5358] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5358] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5358] chdir("./file0") = 0
[pid 5358] ioctl(4, LOOP_CLR_FD) = 0
[pid 5358] close(4) = 0
[pid 5358] exit_group(0) = ?
[pid 5358] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5358, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./143", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./143", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./143/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./143/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./143/binderfs") = 0
umount2("./143/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./143/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./143/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./143/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./143/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./143/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./143") = 0
mkdir("./144", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5360
./strace-static-x86_64: Process 5360 attached
[pid 5360] chdir("./144") = 0
[pid 5360] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5360] setpgid(0, 0) = 0
[pid 5360] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5360] write(3, "1000", 4) = 4
[pid 5360] close(3) = 0
[pid 5360] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5360] memfd_create("syzkaller", 0) = 3
[pid 5360] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5360] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5360] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5360] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.471511][ T5358] loop0: detected capacity change from 0 to 512
[ 67.479034][ T5358] EXT4-fs: Ignoring removed oldalloc option
[ 67.485665][ T5358] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.495710][ T5358] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.503887][ T5358] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5360] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5360] close(3) = 0
[pid 5360] mkdir("./file0", 0777) = 0
[pid 5360] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5360] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5360] chdir("./file0") = 0
[pid 5360] ioctl(4, LOOP_CLR_FD) = 0
[pid 5360] close(4) = 0
[pid 5360] exit_group(0) = ?
[pid 5360] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5360, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./144", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./144", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./144/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./144/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./144/binderfs") = 0
umount2("./144/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./144/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./144/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./144/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./144/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./144/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./144") = 0
mkdir("./145", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5362
./strace-static-x86_64: Process 5362 attached
[pid 5362] chdir("./145") = 0
[pid 5362] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5362] setpgid(0, 0) = 0
[pid 5362] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5362] write(3, "1000", 4) = 4
[pid 5362] close(3) = 0
[pid 5362] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5362] memfd_create("syzkaller", 0) = 3
[pid 5362] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 67.539357][ T5360] loop0: detected capacity change from 0 to 512
[ 67.540964][ T5070] Buffer I/O error on dev loop0, logical block 0, async page read
[ 67.547449][ T5360] EXT4-fs: Ignoring removed oldalloc option
[ 67.560036][ T5360] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.570113][ T5360] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.578533][ T5360] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5362] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5362] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5362] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5362] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5362] close(3) = 0
[pid 5362] mkdir("./file0", 0777) = 0
[pid 5362] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5362] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5362] chdir("./file0") = 0
[pid 5362] ioctl(4, LOOP_CLR_FD) = 0
[pid 5362] close(4) = 0
[pid 5362] exit_group(0) = ?
[pid 5362] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5362, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./145", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./145", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./145/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./145/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./145/binderfs") = 0
umount2("./145/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./145/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./145/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./145/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./145/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./145/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./145") = 0
mkdir("./146", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5364
./strace-static-x86_64: Process 5364 attached
[pid 5364] chdir("./146") = 0
[pid 5364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5364] setpgid(0, 0) = 0
[pid 5364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5364] write(3, "1000", 4) = 4
[pid 5364] close(3) = 0
[pid 5364] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5364] memfd_create("syzkaller", 0) = 3
[pid 5364] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5364] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5364] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5364] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.623903][ T5362] loop0: detected capacity change from 0 to 512
[ 67.632390][ T5362] EXT4-fs: Ignoring removed oldalloc option
[ 67.638972][ T5362] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.648814][ T5362] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.657347][ T5362] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5364] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5364] close(3) = 0
[pid 5364] mkdir("./file0", 0777) = 0
[pid 5364] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5364] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5364] chdir("./file0") = 0
[pid 5364] ioctl(4, LOOP_CLR_FD) = 0
[pid 5364] close(4) = 0
[pid 5364] exit_group(0) = ?
[pid 5364] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5364, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./146", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./146", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./146/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./146/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./146/binderfs") = 0
umount2("./146/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./146/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./146/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./146/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./146/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./146/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./146") = 0
mkdir("./147", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5366
./strace-static-x86_64: Process 5366 attached
[pid 5366] chdir("./147") = 0
[pid 5366] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5366] setpgid(0, 0) = 0
[pid 5366] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5366] write(3, "1000", 4) = 4
[pid 5366] close(3) = 0
[pid 5366] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5366] memfd_create("syzkaller", 0) = 3
[pid 5366] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5366] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5366] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5366] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.698795][ T5364] loop0: detected capacity change from 0 to 512
[ 67.707093][ T5364] EXT4-fs: Ignoring removed oldalloc option
[ 67.713818][ T5364] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.723812][ T5364] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.732068][ T5364] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5366] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5366] close(3) = 0
[pid 5366] mkdir("./file0", 0777) = 0
[pid 5366] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5366] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5366] chdir("./file0") = 0
[pid 5366] ioctl(4, LOOP_CLR_FD) = 0
[pid 5366] close(4) = 0
[pid 5366] exit_group(0) = ?
[pid 5366] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5366, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./147", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./147", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./147/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./147/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./147/binderfs") = 0
umount2("./147/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./147/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./147/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./147/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./147/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./147/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./147") = 0
mkdir("./148", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5368
./strace-static-x86_64: Process 5368 attached
[pid 5368] chdir("./148") = 0
[pid 5368] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5368] setpgid(0, 0) = 0
[pid 5368] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5368] write(3, "1000", 4) = 4
[pid 5368] close(3) = 0
[pid 5368] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5368] memfd_create("syzkaller", 0) = 3
[pid 5368] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5368] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5368] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5368] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.770575][ T5366] loop0: detected capacity change from 0 to 512
[ 67.778279][ T5366] EXT4-fs: Ignoring removed oldalloc option
[ 67.784992][ T5366] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.794876][ T5366] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.802948][ T5366] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5368] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5368] close(3) = 0
[pid 5368] mkdir("./file0", 0777) = 0
[pid 5368] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5368] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5368] chdir("./file0") = 0
[pid 5368] ioctl(4, LOOP_CLR_FD) = 0
[pid 5368] close(4) = 0
[pid 5368] exit_group(0) = ?
[pid 5368] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5368, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./148", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./148", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./148/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./148/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./148/binderfs") = 0
umount2("./148/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./148/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./148/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./148/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./148/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./148/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./148") = 0
mkdir("./149", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5370
./strace-static-x86_64: Process 5370 attached
[pid 5370] chdir("./149") = 0
[pid 5370] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5370] setpgid(0, 0) = 0
[pid 5370] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5370] write(3, "1000", 4) = 4
[pid 5370] close(3) = 0
[pid 5370] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5370] memfd_create("syzkaller", 0) = 3
[pid 5370] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5370] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5370] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5370] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.838469][ T5368] loop0: detected capacity change from 0 to 512
[ 67.846354][ T5368] EXT4-fs: Ignoring removed oldalloc option
[ 67.852997][ T5368] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.862938][ T5368] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.871147][ T5368] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5370] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5370] close(3) = 0
[pid 5370] mkdir("./file0", 0777) = 0
[pid 5370] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5370] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5370] chdir("./file0") = 0
[pid 5370] ioctl(4, LOOP_CLR_FD) = 0
[pid 5370] close(4) = 0
[pid 5370] exit_group(0) = ?
[pid 5370] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5370, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./149", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./149", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./149/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./149/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./149/binderfs") = 0
umount2("./149/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./149/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./149/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./149/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./149/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./149/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./149") = 0
mkdir("./150", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5372
./strace-static-x86_64: Process 5372 attached
[pid 5372] chdir("./150") = 0
[pid 5372] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5372] setpgid(0, 0) = 0
[pid 5372] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5372] write(3, "1000", 4) = 4
[pid 5372] close(3) = 0
[pid 5372] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5372] memfd_create("syzkaller", 0) = 3
[pid 5372] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5372] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5372] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5372] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.913838][ T5370] loop0: detected capacity change from 0 to 512
[ 67.922131][ T5370] EXT4-fs: Ignoring removed oldalloc option
[ 67.928500][ T5370] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 67.938442][ T5370] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 67.946232][ T5370] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5372] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5372] close(3) = 0
[pid 5372] mkdir("./file0", 0777) = 0
[pid 5372] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5372] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5372] chdir("./file0") = 0
[pid 5372] ioctl(4, LOOP_CLR_FD) = 0
[pid 5372] close(4) = 0
[pid 5372] exit_group(0) = ?
[pid 5372] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5372, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./150", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./150", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./150/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./150/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./150/binderfs") = 0
umount2("./150/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./150/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./150/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./150/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./150/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./150/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./150") = 0
mkdir("./151", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5374
./strace-static-x86_64: Process 5374 attached
[pid 5374] chdir("./151") = 0
[pid 5374] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5374] setpgid(0, 0) = 0
[pid 5374] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5374] write(3, "1000", 4) = 4
[pid 5374] close(3) = 0
[pid 5374] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5374] memfd_create("syzkaller", 0) = 3
[pid 5374] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5374] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5374] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5374] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 67.989053][ T5372] loop0: detected capacity change from 0 to 512
[ 67.997040][ T5372] EXT4-fs: Ignoring removed oldalloc option
[ 68.004006][ T5372] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.013687][ T5372] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.021604][ T5372] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5374] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5374] close(3) = 0
[pid 5374] mkdir("./file0", 0777) = 0
[pid 5374] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5374] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5374] chdir("./file0") = 0
[pid 5374] ioctl(4, LOOP_CLR_FD) = 0
[pid 5374] close(4) = 0
[pid 5374] exit_group(0) = ?
[pid 5374] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5374, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./151", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./151", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./151/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./151/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./151/binderfs") = 0
umount2("./151/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./151/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./151/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./151/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./151/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./151/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
[ 68.062279][ T5374] loop0: detected capacity change from 0 to 512
[ 68.070318][ T5374] EXT4-fs: Ignoring removed oldalloc option
[ 68.077180][ T5374] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.086807][ T5374] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.095377][ T5374] EXT4-fs (loop0): 1 truncate cleaned up
rmdir("./151") = 0
mkdir("./152", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5376
./strace-static-x86_64: Process 5376 attached
[pid 5376] chdir("./152") = 0
[pid 5376] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5376] setpgid(0, 0) = 0
[pid 5376] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5376] write(3, "1000", 4) = 4
[pid 5376] close(3) = 0
[pid 5376] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5376] memfd_create("syzkaller", 0) = 3
[pid 5376] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5376] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5376] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5376] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5376] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5376] close(3) = 0
[pid 5376] mkdir("./file0", 0777) = 0
[pid 5376] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5376] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5376] chdir("./file0") = 0
[pid 5376] ioctl(4, LOOP_CLR_FD) = 0
[pid 5376] close(4) = 0
[pid 5376] exit_group(0) = ?
[pid 5376] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5376, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./152", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./152", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./152/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./152/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./152/binderfs") = 0
umount2("./152/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./152/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./152/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./152/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./152/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./152/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./152") = 0
mkdir("./153", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5378
./strace-static-x86_64: Process 5378 attached
[pid 5378] chdir("./153") = 0
[pid 5378] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5378] setpgid(0, 0) = 0
[pid 5378] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5378] write(3, "1000", 4) = 4
[pid 5378] close(3) = 0
[pid 5378] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5378] memfd_create("syzkaller", 0) = 3
[pid 5378] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5378] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5378] munmap(0x7fa8deb6c000, 262144) = 0
[ 68.151936][ T5376] loop0: detected capacity change from 0 to 512
[ 68.159622][ T5376] EXT4-fs: Ignoring removed oldalloc option
[ 68.166199][ T5376] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.176338][ T5376] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.185085][ T5376] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5378] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5378] close(3) = 0
[pid 5378] mkdir("./file0", 0777) = 0
[pid 5378] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5378] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5378] chdir("./file0") = 0
[pid 5378] ioctl(4, LOOP_CLR_FD) = 0
[pid 5378] close(4) = 0
[pid 5378] exit_group(0) = ?
[pid 5378] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5378, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./153", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./153", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./153/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./153/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./153/binderfs") = 0
umount2("./153/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./153/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./153/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./153/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./153/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
[ 68.233289][ T5378] loop0: detected capacity change from 0 to 512
[ 68.241321][ T5378] EXT4-fs: Ignoring removed oldalloc option
[ 68.247913][ T5378] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.257629][ T5378] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.265660][ T5378] EXT4-fs (loop0): 1 truncate cleaned up
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./153/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./153") = 0
mkdir("./154", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5380
./strace-static-x86_64: Process 5380 attached
[pid 5380] chdir("./154") = 0
[pid 5380] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5380] setpgid(0, 0) = 0
[pid 5380] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5380] write(3, "1000", 4) = 4
[pid 5380] close(3) = 0
[pid 5380] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5380] memfd_create("syzkaller", 0) = 3
[pid 5380] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5380] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5380] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5380] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5380] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5380] close(3) = 0
[pid 5380] mkdir("./file0", 0777) = 0
[pid 5380] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5380] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5380] chdir("./file0") = 0
[pid 5380] ioctl(4, LOOP_CLR_FD) = 0
[pid 5380] close(4) = 0
[pid 5380] exit_group(0) = ?
[pid 5380] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5380, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./154", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./154", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./154/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./154/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./154/binderfs") = 0
umount2("./154/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./154/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./154/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./154/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./154/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./154/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./154") = 0
mkdir("./155", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
[ 68.330644][ T5380] loop0: detected capacity change from 0 to 512
[ 68.338765][ T5380] EXT4-fs: Ignoring removed oldalloc option
[ 68.345463][ T5380] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.355821][ T5380] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.363885][ T5380] EXT4-fs (loop0): 1 truncate cleaned up
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5382
./strace-static-x86_64: Process 5382 attached
[pid 5382] chdir("./155") = 0
[pid 5382] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5382] setpgid(0, 0) = 0
[pid 5382] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5382] write(3, "1000", 4) = 4
[pid 5382] close(3) = 0
[pid 5382] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5382] memfd_create("syzkaller", 0) = 3
[pid 5382] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5382] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5382] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5382] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5382] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5382] close(3) = 0
[pid 5382] mkdir("./file0", 0777) = 0
[pid 5382] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5382] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5382] chdir("./file0") = 0
[pid 5382] ioctl(4, LOOP_CLR_FD) = 0
[pid 5382] close(4) = 0
[pid 5382] exit_group(0) = ?
[pid 5382] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5382, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./155", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./155", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./155/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./155/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./155/binderfs") = 0
umount2("./155/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./155/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./155/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./155/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./155/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./155/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./155") = 0
mkdir("./156", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = 0
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5384
./strace-static-x86_64: Process 5384 attached
[pid 5384] chdir("./156") = 0
[pid 5384] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5384] setpgid(0, 0) = 0
[pid 5384] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5384] write(3, "1000", 4) = 4
[pid 5384] close(3) = 0
[pid 5384] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5384] memfd_create("syzkaller", 0) = 3
[pid 5384] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5384] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5384] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5384] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 68.445725][ T5382] loop0: detected capacity change from 0 to 512
[ 68.454249][ T5382] EXT4-fs: Ignoring removed oldalloc option
[ 68.460664][ T5382] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.470496][ T5382] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.478596][ T5382] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5384] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5384] close(3) = 0
[pid 5384] mkdir("./file0", 0777) = 0
[ 68.508171][ T5384] loop0: detected capacity change from 0 to 512
[ 68.509749][ T5070] blk_print_req_error: 4 callbacks suppressed
[ 68.509761][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 68.516231][ T5384] EXT4-fs: Ignoring removed oldalloc option
[ 68.536718][ T5384] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.546833][ T5384] EXT4-fs (loop0): orphan cleanup on readonly fs
[pid 5384] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5384] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5384] chdir("./file0") = 0
[pid 5384] ioctl(4, LOOP_CLR_FD) = 0
[pid 5384] close(4) = 0
[pid 5384] exit_group(0) = ?
[pid 5384] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5384, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./156", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./156", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./156/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./156/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./156/binderfs") = 0
umount2("./156/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./156/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./156/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./156/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./156/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./156/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./156") = 0
mkdir("./157", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5386
./strace-static-x86_64: Process 5386 attached
[pid 5386] chdir("./157") = 0
[pid 5386] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5386] setpgid(0, 0) = 0
[pid 5386] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5386] write(3, "1000", 4) = 4
[pid 5386] close(3) = 0
[pid 5386] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5386] memfd_create("syzkaller", 0) = 3
[pid 5386] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5386] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[ 68.554741][ T5384] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5386] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5386] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5386] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5386] close(3) = 0
[pid 5386] mkdir("./file0", 0777) = 0
[pid 5386] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5386] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5386] chdir("./file0") = 0
[pid 5386] ioctl(4, LOOP_CLR_FD) = 0
[pid 5386] close(4) = 0
[pid 5386] exit_group(0) = ?
[pid 5386] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5386, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./157", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./157", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./157/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./157/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./157/binderfs") = 0
umount2("./157/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./157/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./157/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./157/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./157/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./157/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./157") = 0
mkdir("./158", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
[ 68.582411][ T5386] loop0: detected capacity change from 0 to 512
[ 68.583813][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 68.589861][ T5386] EXT4-fs: Ignoring removed oldalloc option
[ 68.605088][ T5386] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.616033][ T5386] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.624250][ T5386] EXT4-fs (loop0): 1 truncate cleaned up
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5388
./strace-static-x86_64: Process 5388 attached
[pid 5388] chdir("./158") = 0
[pid 5388] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5388] setpgid(0, 0) = 0
[pid 5388] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5388] write(3, "1000", 4) = 4
[pid 5388] close(3) = 0
[pid 5388] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5388] memfd_create("syzkaller", 0) = 3
[pid 5388] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5388] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5388] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5388] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5388] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5388] close(3) = 0
[pid 5388] mkdir("./file0", 0777) = 0
[pid 5388] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5388] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5388] chdir("./file0") = 0
[pid 5388] ioctl(4, LOOP_CLR_FD) = 0
[pid 5388] close(4) = 0
[pid 5388] exit_group(0) = ?
[pid 5388] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5388, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./158", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./158", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./158/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./158/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./158/binderfs") = 0
umount2("./158/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./158/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./158/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./158/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./158/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./158/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./158") = 0
mkdir("./159", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5390
./strace-static-x86_64: Process 5390 attached
[pid 5390] chdir("./159") = 0
[pid 5390] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5390] setpgid(0, 0) = 0
[pid 5390] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5390] write(3, "1000", 4) = 4
[pid 5390] close(3) = 0
[pid 5390] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5390] memfd_create("syzkaller", 0) = 3
[pid 5390] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 68.666064][ T5388] loop0: detected capacity change from 0 to 512
[ 68.673704][ T5388] EXT4-fs: Ignoring removed oldalloc option
[ 68.680344][ T5388] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.690637][ T5388] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.699005][ T5388] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5390] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5390] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5390] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5390] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5390] close(3) = 0
[pid 5390] mkdir("./file0", 0777) = 0
[pid 5390] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5390] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5390] chdir("./file0") = 0
[pid 5390] ioctl(4, LOOP_CLR_FD) = 0
[pid 5390] close(4) = 0
[pid 5390] exit_group(0) = ?
[pid 5390] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5390, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./159", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./159", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./159/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./159/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./159/binderfs") = 0
umount2("./159/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./159/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./159/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./159/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./159/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./159/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./159") = 0
mkdir("./160", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5392
./strace-static-x86_64: Process 5392 attached
[pid 5392] chdir("./160") = 0
[pid 5392] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5392] setpgid(0, 0) = 0
[pid 5392] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[ 68.730726][ T5390] loop0: detected capacity change from 0 to 512
[ 68.734743][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 68.738283][ T5390] EXT4-fs: Ignoring removed oldalloc option
[ 68.753402][ T5390] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.763233][ T5390] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.771876][ T5390] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5392] write(3, "1000", 4) = 4
[pid 5392] close(3) = 0
[pid 5392] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5392] memfd_create("syzkaller", 0) = 3
[pid 5392] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5392] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5392] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5392] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5392] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5392] close(3) = 0
[pid 5392] mkdir("./file0", 0777) = 0
[pid 5392] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5392] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5392] chdir("./file0") = 0
[pid 5392] ioctl(4, LOOP_CLR_FD) = 0
[pid 5392] close(4) = 0
[pid 5392] exit_group(0) = ?
[pid 5392] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5392, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
umount2("./160", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./160", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./160/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./160/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./160/binderfs") = 0
umount2("./160/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./160/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./160/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./160/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./160/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./160/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./160") = 0
mkdir("./161", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5394
./strace-static-x86_64: Process 5394 attached
[pid 5394] chdir("./161") = 0
[pid 5394] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5394] setpgid(0, 0) = 0
[pid 5394] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5394] write(3, "1000", 4) = 4
[pid 5394] close(3) = 0
[pid 5394] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5394] memfd_create("syzkaller", 0) = 3
[pid 5394] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[ 68.819577][ T5392] loop0: detected capacity change from 0 to 512
[ 68.827918][ T5392] EXT4-fs: Ignoring removed oldalloc option
[ 68.834560][ T5392] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.844798][ T5392] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.852494][ T5392] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5394] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5394] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5394] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5394] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5394] close(3) = 0
[pid 5394] mkdir("./file0", 0777) = 0
[pid 5394] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5394] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5394] chdir("./file0") = 0
[pid 5394] ioctl(4, LOOP_CLR_FD) = 0
[pid 5394] close(4) = 0
[pid 5394] exit_group(0) = ?
[pid 5394] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5394, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./161", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./161", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./161/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./161/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./161/binderfs") = 0
umount2("./161/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./161/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./161/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./161/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./161/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./161/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./161") = 0
mkdir("./162", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5396
./strace-static-x86_64: Process 5396 attached
[pid 5396] chdir("./162") = 0
[pid 5396] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5396] setpgid(0, 0) = 0
[pid 5396] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5396] write(3, "1000", 4) = 4
[pid 5396] close(3) = 0
[pid 5396] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5396] memfd_create("syzkaller", 0) = 3
[ 68.890457][ T5394] loop0: detected capacity change from 0 to 512
[ 68.898047][ T5394] EXT4-fs: Ignoring removed oldalloc option
[ 68.904936][ T5394] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.914569][ T5394] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.923172][ T5394] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5396] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5396] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5396] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5396] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5396] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5396] close(3) = 0
[pid 5396] mkdir("./file0", 0777) = 0
[pid 5396] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5396] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5396] chdir("./file0") = 0
[pid 5396] ioctl(4, LOOP_CLR_FD) = 0
[pid 5396] close(4) = 0
[pid 5396] exit_group(0) = ?
[pid 5396] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5396, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./162", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./162", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./162/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./162/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./162/binderfs") = 0
umount2("./162/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./162/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./162/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./162/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./162/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./162/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./162") = 0
mkdir("./163", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5398
./strace-static-x86_64: Process 5398 attached
[pid 5398] chdir("./163") = 0
[pid 5398] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 68.962884][ T5396] loop0: detected capacity change from 0 to 512
[ 68.970520][ T5396] EXT4-fs: Ignoring removed oldalloc option
[ 68.977320][ T5396] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 68.987039][ T5396] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 68.995453][ T5396] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5398] setpgid(0, 0) = 0
[pid 5398] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5398] write(3, "1000", 4) = 4
[pid 5398] close(3) = 0
[pid 5398] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5398] memfd_create("syzkaller", 0) = 3
[pid 5398] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5398] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5398] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5398] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5398] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5398] close(3) = 0
[pid 5398] mkdir("./file0", 0777) = 0
[pid 5398] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5398] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5398] chdir("./file0") = 0
[pid 5398] ioctl(4, LOOP_CLR_FD) = 0
[pid 5398] close(4) = 0
[pid 5398] exit_group(0) = ?
[pid 5398] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5398, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./163", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./163", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./163/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./163/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./163/binderfs") = 0
umount2("./163/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./163/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./163/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./163/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./163/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./163/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./163") = 0
mkdir("./164", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5400
./strace-static-x86_64: Process 5400 attached
[pid 5400] chdir("./164") = 0
[pid 5400] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5400] setpgid(0, 0) = 0
[pid 5400] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5400] write(3, "1000", 4) = 4
[pid 5400] close(3) = 0
[pid 5400] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5400] memfd_create("syzkaller", 0) = 3
[pid 5400] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5400] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5400] munmap(0x7fa8deb6c000, 262144) = 0
[ 69.032742][ T5398] loop0: detected capacity change from 0 to 512
[ 69.040697][ T5398] EXT4-fs: Ignoring removed oldalloc option
[ 69.047417][ T5398] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.057511][ T5398] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.065666][ T5398] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5400] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5400] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5400] close(3) = 0
[pid 5400] mkdir("./file0", 0777) = 0
[pid 5400] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5400] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5400] chdir("./file0") = 0
[pid 5400] ioctl(4, LOOP_CLR_FD) = 0
[pid 5400] close(4) = 0
[pid 5400] exit_group(0) = ?
[pid 5400] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5400, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./164", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./164", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./164/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./164/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./164/binderfs") = 0
umount2("./164/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./164/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./164/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./164/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./164/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./164/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./164") = 0
mkdir("./165", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5402
./strace-static-x86_64: Process 5402 attached
[pid 5402] chdir("./165") = 0
[pid 5402] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5402] setpgid(0, 0) = 0
[pid 5402] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5402] write(3, "1000", 4) = 4
[pid 5402] close(3) = 0
[pid 5402] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5402] memfd_create("syzkaller", 0) = 3
[pid 5402] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5402] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5402] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5402] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 69.099692][ T5400] loop0: detected capacity change from 0 to 512
[ 69.107915][ T5400] EXT4-fs: Ignoring removed oldalloc option
[ 69.114758][ T5400] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.125109][ T5400] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.133265][ T5400] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5402] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5402] close(3) = 0
[pid 5402] mkdir("./file0", 0777) = 0
[pid 5402] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5402] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5402] chdir("./file0") = 0
[pid 5402] ioctl(4, LOOP_CLR_FD) = 0
[pid 5402] close(4) = 0
[pid 5402] exit_group(0) = ?
[pid 5402] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5402, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./165", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./165", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./165/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./165/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./165/binderfs") = 0
umount2("./165/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./165/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./165/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./165/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./165/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./165/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./165") = 0
mkdir("./166", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5404
./strace-static-x86_64: Process 5404 attached
[pid 5404] chdir("./166") = 0
[pid 5404] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5404] setpgid(0, 0) = 0
[pid 5404] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5404] write(3, "1000", 4) = 4
[pid 5404] close(3) = 0
[pid 5404] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5404] memfd_create("syzkaller", 0) = 3
[pid 5404] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5404] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5404] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5404] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 69.170107][ T5402] loop0: detected capacity change from 0 to 512
[ 69.173046][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 69.178842][ T5402] EXT4-fs: Ignoring removed oldalloc option
[ 69.192645][ T5402] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.202723][ T5402] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.210381][ T5402] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5404] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5404] close(3) = 0
[pid 5404] mkdir("./file0", 0777) = 0
[pid 5404] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5404] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5404] chdir("./file0") = 0
[pid 5404] ioctl(4, LOOP_CLR_FD) = 0
[pid 5404] close(4) = 0
[pid 5404] exit_group(0) = ?
[pid 5404] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5404, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./166", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./166", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./166/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./166/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./166/binderfs") = 0
umount2("./166/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./166/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./166/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./166/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./166/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./166/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./166") = 0
mkdir("./167", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5406 attached
, child_tidptr=0x55555704b5d0) = 5406
[pid 5406] chdir("./167") = 0
[pid 5406] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5406] setpgid(0, 0) = 0
[pid 5406] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5406] write(3, "1000", 4) = 4
[pid 5406] close(3) = 0
[pid 5406] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5406] memfd_create("syzkaller", 0) = 3
[pid 5406] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5406] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5406] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5406] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 69.250197][ T5404] loop0: detected capacity change from 0 to 512
[ 69.258229][ T5404] EXT4-fs: Ignoring removed oldalloc option
[ 69.265045][ T5404] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.274830][ T5404] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.283038][ T5404] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5406] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5406] close(3) = 0
[pid 5406] mkdir("./file0", 0777) = 0
[pid 5406] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5406] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5406] chdir("./file0") = 0
[pid 5406] ioctl(4, LOOP_CLR_FD) = 0
[pid 5406] close(4) = 0
[pid 5406] exit_group(0) = ?
[pid 5406] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5406, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./167", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./167", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./167/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./167/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./167/binderfs") = 0
umount2("./167/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./167/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./167/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./167/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./167/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./167/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./167") = 0
mkdir("./168", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5408
./strace-static-x86_64: Process 5408 attached
[pid 5408] chdir("./168") = 0
[pid 5408] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5408] setpgid(0, 0) = 0
[pid 5408] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5408] write(3, "1000", 4) = 4
[pid 5408] close(3) = 0
[pid 5408] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5408] memfd_create("syzkaller", 0) = 3
[pid 5408] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5408] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5408] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5408] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 69.319795][ T5406] loop0: detected capacity change from 0 to 512
[ 69.323166][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 69.327261][ T5406] EXT4-fs: Ignoring removed oldalloc option
[ 69.343307][ T5406] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.353028][ T5406] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.360691][ T5406] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5408] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5408] close(3) = 0
[pid 5408] mkdir("./file0", 0777) = 0
[pid 5408] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5408] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5408] chdir("./file0") = 0
[pid 5408] ioctl(4, LOOP_CLR_FD) = 0
[pid 5408] close(4) = 0
[pid 5408] exit_group(0) = ?
[pid 5408] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5408, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./168", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./168", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./168/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./168/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./168/binderfs") = 0
umount2("./168/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./168/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./168/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./168/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./168/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./168/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./168") = 0
mkdir("./169", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5410
./strace-static-x86_64: Process 5410 attached
[pid 5410] chdir("./169") = 0
[pid 5410] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5410] setpgid(0, 0) = 0
[pid 5410] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5410] write(3, "1000", 4) = 4
[pid 5410] close(3) = 0
[pid 5410] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5410] memfd_create("syzkaller", 0) = 3
[pid 5410] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5410] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5410] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5410] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 69.396446][ T5408] loop0: detected capacity change from 0 to 512
[ 69.404320][ T5408] EXT4-fs: Ignoring removed oldalloc option
[ 69.410668][ T5408] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.420697][ T5408] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.429013][ T5408] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5410] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5410] close(3) = 0
[pid 5410] mkdir("./file0", 0777) = 0
[pid 5410] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5410] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5410] chdir("./file0") = 0
[pid 5410] ioctl(4, LOOP_CLR_FD) = 0
[pid 5410] close(4) = 0
[pid 5410] exit_group(0) = ?
[pid 5410] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5410, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
umount2("./169", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./169", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./169/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./169/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./169/binderfs") = 0
umount2("./169/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./169/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./169/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./169/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./169/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./169/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./169") = 0
mkdir("./170", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
[ 69.462076][ T5410] loop0: detected capacity change from 0 to 512
[ 69.463360][ T5070] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 69.469581][ T5410] EXT4-fs: Ignoring removed oldalloc option
[ 69.485225][ T5410] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.495134][ T5410] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.503185][ T5410] EXT4-fs (loop0): 1 truncate cleaned up
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5412
./strace-static-x86_64: Process 5412 attached
[pid 5412] chdir("./170") = 0
[pid 5412] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5412] setpgid(0, 0) = 0
[pid 5412] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5412] write(3, "1000", 4) = 4
[pid 5412] close(3) = 0
[pid 5412] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5412] memfd_create("syzkaller", 0) = 3
[pid 5412] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5412] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5412] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5412] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5412] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5412] close(3) = 0
[pid 5412] mkdir("./file0", 0777) = 0
[pid 5412] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5412] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5412] chdir("./file0") = 0
[pid 5412] ioctl(4, LOOP_CLR_FD) = 0
[pid 5412] close(4) = 0
[pid 5412] exit_group(0) = ?
[pid 5412] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5412, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./170", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./170", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x55555704c620 /* 4 entries */, 32768) = 112
umount2("./170/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./170/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./170/binderfs") = 0
umount2("./170/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0
umount2("./170/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./170/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
umount2("./170/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./170/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(4, 0x555557054660 /* 2 entries */, 32768) = 48
getdents64(4, 0x555557054660 /* 0 entries */, 32768) = 0
close(4) = 0
rmdir("./170/file0") = 0
getdents64(3, 0x55555704c620 /* 0 entries */, 32768) = 0
close(3) = 0
rmdir("./170") = 0
mkdir("./171", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555704b5d0) = 5414
./strace-static-x86_64: Process 5414 attached
[pid 5414] chdir("./171") = 0
[pid 5414] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5414] setpgid(0, 0) = 0
[pid 5414] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5414] write(3, "1000", 4) = 4
[pid 5414] close(3) = 0
[pid 5414] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5414] memfd_create("syzkaller", 0) = 3
[pid 5414] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa8deb6c000
[pid 5414] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144
[pid 5414] munmap(0x7fa8deb6c000, 262144) = 0
[pid 5414] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[ 69.554474][ T5412] loop0: detected capacity change from 0 to 512
[ 69.562019][ T5412] EXT4-fs: Ignoring removed oldalloc option
[ 69.568501][ T5412] EXT4-fs: Journaled quota options ignored when QUOTA feature is enabled
[ 69.578267][ T5412] EXT4-fs (loop0): orphan cleanup on readonly fs
[ 69.585979][ T5412] EXT4-fs (loop0): 1 truncate cleaned up
[pid 5414] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5414] close(3) = 0
[pid 5414] mkdir("./file0", 0777) = 0
[pid 5414] mount("/dev/loop0", "./file0", "ext4", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_MANDLOCK, "\x6e\x6f\x6a\x6f\x75\x72\x6e\x61\x6c\x5f\x63\x68\x65\x63\x6b\x73\x75\x6d\x2c\x6f\x6c\x64\x61\x6c\x6c\x6f\x63\x2c\x75\x73\x72\x6a\x71\x75\x6f\x74\x61\x3d\x16\x62\x61\x72\x72\x69\x65\x72\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x35\x2c\x65\x72\x72\x6f\x72\x73\x3d\x72\x65\x6d\x6f\x75\x6e\x74\x2d\x72\x6f\x2c\x61\x62\x6f\x72\x74\x2c\x64\x69\x73\x63\x61\x72\x64\x2c\x75\x73"...) = 0
[pid 5414] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5414] chdir("./file0") = 0
[pid 5414] ioctl(4, LOOP_CLR_FD) = 0