./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3722079123

<...>
Warning: Permanently added '10.128.1.62' (ED25519) to the list of known hosts.
execve("./syz-executor3722079123", ["./syz-executor3722079123"], 0x7ffe1e4c8530 /* 10 vars */) = 0
brk(NULL)                               = 0x555573f7e000
brk(0x555573f7ed00)                     = 0x555573f7ed00
arch_prctl(ARCH_SET_FS, 0x555573f7e380) = 0
set_tid_address(0x555573f7e650)         = 5219
set_robust_list(0x555573f7e660, 24)     = 0
rseq(0x555573f7eca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor3722079123", 4096) = 28
getrandom("\x5f\x1c\x3e\xbb\x61\xc5\xd9\xcc", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555573f7ed00
brk(0x555573f9fd00)                     = 0x555573f9fd00
brk(0x555573fa0000)                     = 0x555573fa0000
mprotect(0x7fbda425f000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
mkdir("./syzkaller.a7oG2X", 0700)       = 0
chmod("./syzkaller.a7oG2X", 0777)       = 0
chdir("./syzkaller.a7oG2X")             = 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=0x555573f7e650) = 5220
./strace-static-x86_64: Process 5220 attached
[pid  5220] set_robust_list(0x555573f7e660, 24) = 0
[pid  5220] chdir("./0")                = 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] write(1, "executing program\n", 18executing program
) = 18
[pid  5220] memfd_create("syzkaller", 0) = 3
[pid  5220] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[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"..., 1048576) = 1048576
[pid  5220] munmap(0x7fbd9bc00000, 138412032) = 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] close(4)                    = 0
[pid  5220] mkdir("./bus", 0777)        = 0
[pid  5220] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5220] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5220] chdir("./bus")              = 0
[pid  5220] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5220] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5220] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5220] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5220] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5220] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[   55.101774][ T5220] loop0: detected capacity change from 0 to 2048
[   55.139847][ T5222] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5220] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5220] memfd_create("syzkaller", 0) = 6
[pid  5220] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   55.167352][ T5220] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   55.185267][ T5220] Remounting filesystem read-only
[pid  5220] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5220] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5220] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5220] close(6)                    = 0
[pid  5220] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[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=3 /* 0.03 s */, si_stime=21 /* 0.21 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./0/binderfs")                  = 0
umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./0/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   55.503119][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./0/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./0/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5223 attached
 <unfinished ...>
[pid  5223] set_robust_list(0x555573f7e660, 24 <unfinished ...>
[pid  5219] <... clone resumed>, child_tidptr=0x555573f7e650) = 5223
[pid  5223] <... set_robust_list resumed>) = 0
[pid  5223] chdir("./1")                = 0
[pid  5223] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5223] setpgid(0, 0)               = 0
[pid  5223] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5223] write(3, "1000", 4)         = 4
[pid  5223] close(3)                    = 0
[pid  5223] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid  5223] write(1, "executing program\n", 18) = 18
[pid  5223] memfd_create("syzkaller", 0) = 3
[pid  5223] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5223] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5223] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5223] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5223] close(3)                    = 0
[pid  5223] close(4)                    = 0
[pid  5223] mkdir("./bus", 0777)        = 0
[pid  5223] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5223] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5223] chdir("./bus")              = 0
[pid  5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5223] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5223] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5223] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5223] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[   55.798754][ T5223] loop0: detected capacity change from 0 to 2048
[   55.838254][ T5224] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5223] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[pid  5223] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5223] memfd_create("syzkaller", 0) = 6
[pid  5223] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   55.880386][ T5223] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   55.896601][ T5223] Remounting filesystem read-only
[pid  5223] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5223] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5223] close(6)                    = 0
[pid  5223] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[pid  5223] exit_group(0)               = ?
[pid  5223] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5223, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=22 /* 0.22 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./1/binderfs")                  = 0
umount2("./1/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./1/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./1/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./1/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   56.236423][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./1/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./1/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5225 attached
 <unfinished ...>
[pid  5225] set_robust_list(0x555573f7e660, 24 <unfinished ...>
[pid  5219] <... clone resumed>, child_tidptr=0x555573f7e650) = 5225
[pid  5225] <... set_robust_list resumed>) = 0
[pid  5225] chdir("./2")                = 0
[pid  5225] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5225] setpgid(0, 0)               = 0
[pid  5225] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5225] write(3, "1000", 4)         = 4
[pid  5225] close(3)                    = 0
[pid  5225] symlink("/dev/binderfs", "./binderfs") = 0
[pid  5225] write(1, "executing program\n", 18executing program
) = 18
[pid  5225] memfd_create("syzkaller", 0) = 3
[pid  5225] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5225] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5225] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5225] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5225] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5225] close(3)                    = 0
[pid  5225] close(4)                    = 0
[pid  5225] mkdir("./bus", 0777)        = 0
[pid  5225] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5225] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5225] chdir("./bus")              = 0
[pid  5225] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5225] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5225] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5225] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5225] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5225] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[   56.488531][ T5225] loop0: detected capacity change from 0 to 2048
[   56.518055][ T5226] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5225] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5225] memfd_create("syzkaller", 0) = 6
[pid  5225] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   56.550864][ T5225] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   56.567701][ T5225] Remounting filesystem read-only
[pid  5225] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5225] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5225] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5225] close(6)                    = 0
[pid  5225] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[pid  5225] exit_group(0)               = ?
[pid  5225] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5225, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=15 /* 0.15 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./2/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./2/binderfs")                  = 0
umount2("./2/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./2/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./2/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./2/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   56.876315][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./2/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./2/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5227 attached
, child_tidptr=0x555573f7e650) = 5227
[pid  5227] set_robust_list(0x555573f7e660, 24) = 0
[pid  5227] chdir("./3")                = 0
[pid  5227] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5227] setpgid(0, 0)               = 0
[pid  5227] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5227] write(3, "1000", 4)         = 4
[pid  5227] close(3)                    = 0
[pid  5227] symlink("/dev/binderfs", "./binderfs"executing program
) = 0
[pid  5227] write(1, "executing program\n", 18) = 18
[pid  5227] memfd_create("syzkaller", 0) = 3
[pid  5227] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5227] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5227] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5227] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5227] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5227] close(3)                    = 0
[pid  5227] close(4)                    = 0
[pid  5227] mkdir("./bus", 0777)        = 0
[   57.168480][ T5227] loop0: detected capacity change from 0 to 2048
[pid  5227] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5227] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5227] chdir("./bus")              = 0
[pid  5227] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5227] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5227] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5227] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5227] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5227] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[pid  5227] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5227] memfd_create("syzkaller", 0) = 6
[pid  5227] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   57.216916][ T5228] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[   57.239617][ T5227] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   57.256930][ T5227] Remounting filesystem read-only
[pid  5227] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5227] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5227] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5227] close(6)                    = 0
[pid  5227] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[pid  5227] exit_group(0)               = ?
[pid  5227] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5227, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=19 /* 0.19 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./3/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./3/binderfs")                  = 0
umount2("./3/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./3/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./3/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./3/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   57.582436][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./3/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./3/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5229 attached
, child_tidptr=0x555573f7e650) = 5229
[pid  5229] set_robust_list(0x555573f7e660, 24) = 0
[pid  5229] chdir("./4")                = 0
[pid  5229] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5229] setpgid(0, 0)               = 0
[pid  5229] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5229] write(3, "1000", 4)         = 4
[pid  5229] close(3)                    = 0
[pid  5229] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid  5229] write(1, "executing program\n", 18) = 18
[pid  5229] memfd_create("syzkaller", 0) = 3
[pid  5229] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5229] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5229] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5229] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5229] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5229] close(3)                    = 0
[pid  5229] close(4)                    = 0
[pid  5229] mkdir("./bus", 0777)        = 0
[pid  5229] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5229] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5229] chdir("./bus")              = 0
[pid  5229] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[   57.847760][ T5229] loop0: detected capacity change from 0 to 2048
[   57.879468][ T5230] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5229] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5229] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5229] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5229] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5229] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[pid  5229] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5229] memfd_create("syzkaller", 0) = 6
[pid  5229] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   57.937580][ T5229] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   57.953709][ T5229] Remounting filesystem read-only
[pid  5229] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5229] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5229] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5229] close(6)                    = 0
[pid  5229] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[pid  5229] exit_group(0)               = ?
[pid  5229] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5229, si_uid=0, si_status=0, si_utime=5 /* 0.05 s */, si_stime=17 /* 0.17 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./4", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./4/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./4/binderfs")                  = 0
umount2("./4/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./4/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./4/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./4/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   58.300128][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./4/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./4/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5231 attached
 <unfinished ...>
[pid  5231] set_robust_list(0x555573f7e660, 24) = 0
[pid  5231] chdir("./5")                = 0
[pid  5219] <... clone resumed>, child_tidptr=0x555573f7e650) = 5231
[pid  5231] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5231] setpgid(0, 0)               = 0
[pid  5231] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5231] write(3, "1000", 4)         = 4
[pid  5231] close(3)                    = 0
[pid  5231] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid  5231] write(1, "executing program\n", 18) = 18
[pid  5231] memfd_create("syzkaller", 0) = 3
[pid  5231] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5231] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5231] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5231] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5231] close(3)                    = 0
[pid  5231] close(4)                    = 0
[pid  5231] mkdir("./bus", 0777)        = 0
[pid  5231] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5231] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5231] chdir("./bus")              = 0
[pid  5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5231] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5231] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5231] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5231] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5231] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[   58.576741][ T5231] loop0: detected capacity change from 0 to 2048
[   58.606361][ T5232] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5231] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5231] memfd_create("syzkaller", 0) = 6
[pid  5231] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   58.636500][ T5231] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   58.653911][ T5231] Remounting filesystem read-only
[pid  5231] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5231] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5231] close(6)                    = 0
[pid  5231] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[pid  5231] exit_group(0)               = ?
[pid  5231] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5231, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=15 /* 0.15 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./5", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./5/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./5/binderfs")                  = 0
umount2("./5/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./5/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./5/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./5/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   59.003422][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./5/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./5/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5233 attached
, child_tidptr=0x555573f7e650) = 5233
[pid  5233] set_robust_list(0x555573f7e660, 24) = 0
[pid  5233] chdir("./6")                = 0
[pid  5233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5233] setpgid(0, 0)               = 0
[pid  5233] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5233] write(3, "1000", 4)         = 4
[pid  5233] close(3)                    = 0
[pid  5233] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid  5233] write(1, "executing program\n", 18) = 18
[pid  5233] memfd_create("syzkaller", 0) = 3
[pid  5233] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5233] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5233] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5233] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5233] close(3)                    = 0
[pid  5233] close(4)                    = 0
[pid  5233] mkdir("./bus", 0777)        = 0
[pid  5233] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5233] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5233] chdir("./bus")              = 0
[pid  5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5233] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5233] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5233] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5233] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5233] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[   59.332630][ T5233] loop0: detected capacity change from 0 to 2048
[   59.369780][ T5234] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5233] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5233] memfd_create("syzkaller", 0) = 6
[pid  5233] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   59.391236][ T5233] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   59.408510][ T5233] Remounting filesystem read-only
[pid  5233] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5233] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5233] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5233] close(6)                    = 0
[pid  5233] openat(AT_FDCWD, "pids.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EROFS (Read-only file system)
[pid  5233] exit_group(0)               = ?
[pid  5233] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5233, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=19 /* 0.19 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
umount2("./6", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x555573f7f6f0 /* 4 entries */, 32768) = 104
umount2("./6/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlink("./6/binderfs")                  = 0
umount2("./6/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
umount2("./6/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
newfstatat(AT_FDCWD, "./6/bus", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
umount2("./6/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[   59.763117][ T5219] NILFS (loop0): disposed unprocessed dirty file(s) when detaching log writer
openat(AT_FDCWD, "./6/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0
getdents64(4, 0x555573f87730 /* 2 entries */, 32768) = 48
getdents64(4, 0x555573f87730 /* 0 entries */, 32768) = 0
close(4)                                = 0
rmdir("./6/bus")                        = 0
getdents64(3, 0x555573f7f6f0 /* 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)                   = 0
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5235 attached
, child_tidptr=0x555573f7e650) = 5235
[pid  5235] set_robust_list(0x555573f7e660, 24) = 0
[pid  5235] chdir("./7")                = 0
[pid  5235] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5235] setpgid(0, 0)               = 0
[pid  5235] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5235] write(3, "1000", 4)         = 4
[pid  5235] close(3)                    = 0
[pid  5235] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid  5235] write(1, "executing program\n", 18) = 18
[pid  5235] memfd_create("syzkaller", 0) = 3
[pid  5235] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[pid  5235] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid  5235] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5235] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5235] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5235] close(3)                    = 0
[pid  5235] close(4)                    = 0
[pid  5235] mkdir("./bus", 0777)        = 0
[pid  5235] mount("/dev/loop0", "./bus", "nilfs2", 0, "") = 0
[pid  5235] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5235] chdir("./bus")              = 0
[pid  5235] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5235] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5235] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0
[pid  5235] openat(AT_FDCWD, ".", O_RDONLY) = 4
[pid  5235] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0
[pid  5235] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 5
[   60.101273][ T5235] loop0: detected capacity change from 0 to 2048
[   60.138215][ T5236] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5235] rename("./file1", "./file0/file0") = -1 EIO (Input/output error)
[pid  5235] memfd_create("syzkaller", 0) = 6
[pid  5235] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd9bc00000
[   60.156948][ T5235] NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
[   60.173298][ T5235] Remounting filesystem read-only
[pid  5235] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216
[pid  5235] munmap(0x7fbd9bc00000, 138412032) = 0
[pid  5235] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5235] close(6)                    = 0
[   60.384721][ T5235] ------------[ cut here ]------------
[   60.390409][ T5235] kernel BUG at fs/buffer.c:2785!
[   60.395555][ T5235] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
[   60.402508][ T5235] CPU: 0 UID: 0 PID: 5235 Comm: syz-executor372 Not tainted 6.12.0-rc4-syzkaller #0
[   60.411860][ T5235] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
[   60.421925][ T5235] RIP: 0010:submit_bh_wbc+0x556/0x560
[   60.427339][ T5235] Code: 89 fa e8 dd 76 cc 02 e9 95 fe ff ff e8 73 85 74 ff 90 0f 0b e8 6b 85 74 ff 90 0f 0b e8 63 85 74 ff 90 0f 0b e8 5b 85 74 ff 90 <0f> 0b e8 53 85 74 ff 90 0f 0b 90 90 90 90 90 90 90 90 90 90 90 90
[   60.446937][ T5235] RSP: 0018:ffffc90003b6f0d8 EFLAGS: 00010293
[   60.452992][ T5235] RAX: ffffffff82206235 RBX: 0000000000000154 RCX: ffff88802d490000
[   60.461036][ T5235] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
[   60.468995][ T5235] RBP: 0000000000000100 R08: ffffffff82205df9 R09: 1ffff1100ef571d0
[   60.476948][ T5235] R10: dffffc0000000000 R11: ffffed100ef571d1 R12: 0000000000000000
[   60.484905][ T5235] R13: ffff888077ab8e80 R14: 0000000000000000 R15: 1ffff1100ef571d0
[   60.492864][ T5235] FS:  0000555573f7e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
[   60.501779][ T5235] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   60.508350][ T5235] CR2: 00007fbda422e00a CR3: 000000002fc1e000 CR4: 00000000003526f0
[   60.516310][ T5235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   60.524353][ T5235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   60.532310][ T5235] Call Trace:
[   60.535582][ T5235]  <TASK>
[   60.538502][ T5235]  ? __die_body+0x5f/0xb0
[   60.542828][ T5235]  ? die+0x9e/0xc0
[   60.546535][ T5235]  ? do_trap+0x15a/0x3a0
[   60.550772][ T5235]  ? submit_bh_wbc+0x556/0x560
[   60.555528][ T5235]  ? do_error_trap+0x1dc/0x2c0
[   60.560283][ T5235]  ? submit_bh_wbc+0x556/0x560
[   60.565036][ T5235]  ? __pfx_do_error_trap+0x10/0x10
[   60.570143][ T5235]  ? handle_invalid_op+0x34/0x40
[   60.575071][ T5235]  ? submit_bh_wbc+0x556/0x560
[   60.579825][ T5235]  ? exc_invalid_op+0x38/0x50
[   60.584502][ T5235]  ? asm_exc_invalid_op+0x1a/0x20
[   60.589529][ T5235]  ? submit_bh_wbc+0x119/0x560
[   60.594288][ T5235]  ? submit_bh_wbc+0x555/0x560
[   60.599042][ T5235]  ? submit_bh_wbc+0x556/0x560
[   60.603794][ T5235]  ? submit_bh_wbc+0x555/0x560
[   60.608549][ T5235]  block_read_full_folio+0x93b/0xcd0
[   60.613855][ T5235]  ? __pfx_nilfs_get_block+0x10/0x10
[   60.619139][ T5235]  ? __pfx_block_read_full_folio+0x10/0x10
[   60.624938][ T5235]  ? __lock_acquire+0x1384/0x2050
[   60.629958][ T5235]  do_mpage_readpage+0x1a73/0x1c80
[   60.635064][ T5235]  mpage_read_folio+0x108/0x1e0
[   60.639899][ T5235]  ? __pfx_lock_release+0x10/0x10
[   60.644915][ T5235]  ? __pfx_nilfs_get_block+0x10/0x10
[   60.650188][ T5235]  ? __pfx_mpage_read_folio+0x10/0x10
[   60.655574][ T5235]  ? __pfx_nilfs_get_block+0x10/0x10
[   60.660847][ T5235]  ? filemap_get_entry+0x328/0x3b0
[   60.665950][ T5235]  ? filemap_get_entry+0x123/0x3b0
[   60.671051][ T5235]  ? __pfx_filemap_get_entry+0x10/0x10
[   60.676504][ T5235]  filemap_read_folio+0x14b/0x630
[   60.681517][ T5235]  ? __pfx_nilfs_read_folio+0x10/0x10
[   60.686879][ T5235]  ? __pfx_filemap_read_folio+0x10/0x10
[   60.692413][ T5235]  ? __filemap_get_folio+0x736/0xbd0
[   60.697687][ T5235]  do_read_cache_folio+0x3f5/0x850
[   60.702784][ T5235]  ? __pfx_nilfs_read_folio+0x10/0x10
[   60.708143][ T5235]  nilfs_get_folio+0x4b/0x240
[   60.712811][ T5235]  nilfs_find_entry+0x13d/0x660
[   60.717655][ T5235]  nilfs_inode_by_name+0xad/0x240
[   60.722672][ T5235]  ? __pfx_nilfs_inode_by_name+0x10/0x10
[   60.728291][ T5235]  ? d_alloc_parallel+0x311/0x1600
[   60.733394][ T5235]  nilfs_lookup+0xed/0x210
[   60.737802][ T5235]  ? __d_lookup+0x706/0x7b0
[   60.742301][ T5235]  ? __pfx_nilfs_lookup+0x10/0x10
[   60.747317][ T5235]  ? mode_strip_sgid+0xa1/0x1a0
[   60.752243][ T5235]  ? __pfx_nilfs_lookup+0x10/0x10
[   60.757256][ T5235]  path_openat+0x11a7/0x3590
[   60.761841][ T5235]  ? __pfx_path_openat+0x10/0x10
[   60.766772][ T5235]  do_filp_open+0x235/0x490
[   60.771266][ T5235]  ? __pfx_do_filp_open+0x10/0x10
[   60.776283][ T5235]  ? _raw_spin_unlock+0x28/0x50
[   60.781125][ T5235]  ? alloc_fd+0x5a1/0x640
[   60.785446][ T5235]  do_sys_openat2+0x13e/0x1d0
[   60.790111][ T5235]  ? __pfx_do_sys_openat2+0x10/0x10
[   60.795295][ T5235]  ? lockdep_hardirqs_on+0x99/0x150
[   60.800483][ T5235]  ? _raw_spin_unlock_irq+0x2e/0x50
[   60.805672][ T5235]  ? ptrace_notify+0x279/0x380
[   60.810426][ T5235]  __x64_sys_openat+0x247/0x2a0
[   60.815266][ T5235]  ? __pfx___x64_sys_openat+0x10/0x10
[   60.820625][ T5235]  ? do_syscall_64+0x100/0x230
[   60.825377][ T5235]  do_syscall_64+0xf3/0x230
[   60.829869][ T5235]  ? clear_bhb_loop+0x35/0x90
[   60.834535][ T5235]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   60.840425][ T5235] RIP: 0033:0x7fbda41e54a9
[   60.844841][ T5235] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[   60.864435][ T5235] RSP: 002b:00007ffe5e610168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   60.872838][ T5235] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbda41e54a9
[   60.880800][ T5235] RDX: 000000000000275a RSI: 0000000020000180 RDI: 00000000ffffff9c
[   60.888762][ T5235] RBP: 0000000000000000 R08: 00000000000051a5 R09: 000000002000a440
[   60.896720][ T5235] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe5e61019c
[   60.904678][ T5235] R13: 0000000000000007 R14: 431bde82d7b634db R15: 00007ffe5e6101d0
[   60.912639][ T5235]  </TASK>
[   60.915644][ T5235] Modules linked in:
[   60.919684][ T5235] ---[ end trace 0000000000000000 ]---
[   60.925188][ T5235] RIP: 0010:submit_bh_wbc+0x556/0x560
[   60.930659][ T5235] Code: 89 fa e8 dd 76 cc 02 e9 95 fe ff ff e8 73 85 74 ff 90 0f 0b e8 6b 85 74 ff 90 0f 0b e8 63 85 74 ff 90 0f 0b e8 5b 85 74 ff 90 <0f> 0b e8 53 85 74 ff 90 0f 0b 90 90 90 90 90 90 90 90 90 90 90 90
[   60.950372][ T5235] RSP: 0018:ffffc90003b6f0d8 EFLAGS: 00010293
[   60.956457][ T5235] RAX: ffffffff82206235 RBX: 0000000000000154 RCX: ffff88802d490000
[   60.964546][ T5235] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
[   60.972541][ T5235] RBP: 0000000000000100 R08: ffffffff82205df9 R09: 1ffff1100ef571d0
[   60.980542][ T5235] R10: dffffc0000000000 R11: ffffed100ef571d1 R12: 0000000000000000
[   60.988549][ T5235] R13: ffff888077ab8e80 R14: 0000000000000000 R15: 1ffff1100ef571d0
[   60.996539][ T5235] FS:  0000555573f7e380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
[   61.005499][ T5235] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   61.012105][ T5235] CR2: 00007fbd9cbff000 CR3: 000000002fc1e000 CR4: 00000000003526f0
[   61.020112][ T5235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   61.028121][ T5235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   61.036106][ T5235] Kernel panic - not syncing: Fatal exception
[   61.042423][ T5235] Kernel Offset: disabled
[   61.046736][ T5235] Rebooting in 86400 seconds..