ci2-android-5-15/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-15/syz-executor1175649481

<...>

syzkaller
syzkaller login: [    9.365303][  T105] udevd (105) used greatest stack depth: 22888 bytes left
[   21.660037][   T30] kauditd_printk_skb: 31 callbacks suppressed
[   21.660052][   T30] audit: type=1400 audit(1793257432.189:59): avc:  denied  { transition } for  pid=265 comm="sshd-session" path="/bin/sh" dev="sda1" ino=90 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   21.671313][   T30] audit: type=1400 audit(1793257432.189:60): avc:  denied  { noatsecure } for  pid=265 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   21.678863][   T30] audit: type=1400 audit(1793257432.199:61): avc:  denied  { write } for  pid=265 comm="sh" path="pipe:[14856]" dev="pipefs" ino=14856 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1
[   21.699198][   T30] audit: type=1400 audit(1793257432.199:62): avc:  denied  { rlimitinh } for  pid=265 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   21.720876][   T30] audit: type=1400 audit(1793257432.199:63): avc:  denied  { siginh } for  pid=265 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
Warning: Permanently added '10.128.0.126' (ED25519) to the list of known hosts.
execve("ci2-android-5-15/syz-executor1175649481", ["ci2-android-5-15/syz-executor1175649481"], 0x7ffce46c0e10 /* 10 vars */) = 0
brk(NULL)                               = 0x55558446a000
brk(0x55558446ad40)                     = 0x55558446ad40
arch_prctl(ARCH_SET_FS, 0x55558446a3c0) = 0
set_tid_address(0x55558446a690)         = 303
set_robust_list(0x55558446a6a0, 24)     = 0
rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 32, 0, 0x53053053) = -1 ENOSYS (Function not implemented)
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-android-5-15/syz-executor1175649481", 4096) = 45
getrandom("\x57\x8c\x11\x0f\xdc\x69\xf3\x1e", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55558446ad40
brk(0x55558448bd40)                     = 0x55558448bd40
brk(0x55558448c000)                     = 0x55558448c000
mprotect(0x7f1008d23000, 20480, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
getrandom("\xf9\xed\x6c\xf2\xae\x3d\xb9\x4b", 8, GRND_NONBLOCK) = 8
mkdir("./syzkaller.HUlb9E", 0700)       = 0
chmod("./syzkaller.HUlb9E", 0777)       = 0
chdir("./syzkaller.HUlb9E")             = 0
unshare(CLONE_NEWPID)                   = 0
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-android-5-15/strace-static-x86_64: Process 304 attached
, child_tidptr=0x55558446a690) = 304
[pid   303] rt_sigprocmask(SIG_SETMASK, [] <unfinished ...>
[pid   304] set_robust_list(0x55558446a6a0, 24 <unfinished ...>
[pid   303] <... rt_sigprocmask resumed>, NULL, 8) = 0
[pid   304] <... set_robust_list resumed>) = 0
[pid   304] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   304] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   304] getppid()                   = 0
[pid   304] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid   304] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid   304] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid   304] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid   304] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid   304] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid   304] unshare(CLONE_NEWNS)        = 0
[pid   304] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid   304] unshare(CLONE_NEWIPC)       = -1 EINVAL (Invalid argument)
[pid   304] unshare(CLONE_NEWCGROUP)    = 0
[pid   304] unshare(CLONE_NEWUTS)       = 0
[pid   304] unshare(CLONE_SYSVSEM)      = 0
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   304] getpid()                    = 1
[pid   304] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid   304] capset({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid   304] unshare(CLONE_NEWNET)       = 0
[pid   304] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid   304] write(3, "0 65535", 7)      = 7
[pid   304] close(3)                    = 0
[pid   304] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid   304] write(3, "100000", 6)       = 6
[pid   304] close(3)                    = 0
[pid   304] mkdir("./syz-tmp", 0777)    = 0
[   31.549059][   T30] audit: type=1400 audit(1793257442.079:64): avc:  denied  { execmem } for  pid=303 comm="syz-executor117" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   31.575813][   T30] audit: type=1400 audit(1793257442.099:65): avc:  denied  { mounton } for  pid=304 comm="syz-executor117" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1
[pid   304] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid   304] mkdir("./syz-tmp/newroot", 0777) = 0
[pid   304] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid   304] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   304] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid   304] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid   304] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid   304] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   304] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   304] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid   304] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   304] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   304] mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   304] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   304] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid   304] mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL, MS_RDONLY|MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   304] mkdir("./syz-tmp/pivot", 0777) = 0
[pid   304] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid   304] chdir("/")                  = 0
[pid   304] umount2("./pivot", MNT_DETACH) = 0
[pid   304] chroot("./newroot")         = 0
[pid   304] chdir("/")                  = 0
[pid   304] mkdir("/dev/gadgetfs", 0777) = 0
[   31.610551][   T30] audit: type=1400 audit(1793257442.139:66): avc:  denied  { mounton } for  pid=304 comm="syz-executor117" path="/root/syzkaller.HUlb9E/syz-tmp" dev="sda1" ino=2026 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[   31.635403][   T30] audit: type=1400 audit(1793257442.139:67): avc:  denied  { mount } for  pid=304 comm="syz-executor117" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[pid   304] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = -1 ENODEV (No such device)
[pid   304] mkdir("/dev/binderfs", 0777) = 0
[pid   304] mount("binder", "/dev/binderfs", "binder", 0, "stats=global") = 0
[pid   304] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid   304] mkdir("./0", 0777)          = 0
[pid   304] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   304] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55558446a690) = 2
[pid   304] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-5-15/strace-static-x86_64: Process 305 attached
[pid   305] set_robust_list(0x55558446a6a0, 24) = 0
[pid   305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   305] chdir("./0")                = 0
[pid   305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   305] setpgid(0, 0)               = 0
[pid   305] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   305] write(3, "1000", 4)         = 4
[   31.657931][   T30] audit: type=1400 audit(1793257442.139:68): avc:  denied  { mounton } for  pid=304 comm="syz-executor117" path="/root/syzkaller.HUlb9E/syz-tmp/newroot/dev" dev="tmpfs" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_tmpfs_t tclass=dir permissive=1
[   31.664175][  T304] request_module fs-gadgetfs succeeded, but still no fs?
[pid   305] close(3)                    = 0
[pid   305] symlink("/dev/binderfs", "./binderfs") = 0
executing program
[pid   305] write(1, "executing program\n", 18) = 18
[pid   305] mkdir("./bus", 000)         = 0
[pid   305] mount(".", "./bus", "incremental-fs", MS_NOSUID|MS_REC|MS_SILENT, NULL) = 0
[pid   305] close(3)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(4)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   305] exit_group(0)               = ?
[pid   305] +++ exited with 0 +++
[pid   304] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} ---
[   31.685169][   T30] audit: type=1400 audit(1793257442.139:69): avc:  denied  { mount } for  pid=304 comm="syz-executor117" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   31.713314][   T30] audit: type=1400 audit(1793257442.139:70): avc:  denied  { mounton } for  pid=304 comm="syz-executor117" path="/root/syzkaller.HUlb9E/syz-tmp/newroot/selinux" dev="tmpfs" ino=5 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_tmpfs_t tclass=dir permissive=1
[   31.721919][  T305] incfs: ino conflict with backing FS 9
[pid   304] restart_syscall(<... resuming interrupted rt_sigprocmask ...>) = 0
[pid   304] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   304] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
[pid   304] fstat(3, {st_mode=S_IFDIR|0700, st_size=120, ...}) = 0
[pid   304] getdents64(3, 0x55558446b750 /* 6 entries */, 32768) = 168
[pid   304] umount2("./0/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   304] newfstatat(AT_FDCWD, "./0/.incomplete", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   304] umount2("./0/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   304] openat(AT_FDCWD, "./0/.incomplete", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   304] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   304] getdents64(4, 0x555584473790 /* 2 entries */, 32768) = 48
[pid   304] getdents64(4, 0x555584473790 /* 0 entries */, 32768) = 0
[pid   304] close(4)                    = 0
[pid   304] rmdir("./0/.incomplete")    = 0
[pid   304] umount2("./0/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   304] newfstatat(AT_FDCWD, "./0/.index", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   304] umount2("./0/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   304] openat(AT_FDCWD, "./0/.index", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   304] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   304] getdents64(4, 0x555584473790 /* 2 entries */, 32768) = 48
[pid   304] getdents64(4, 0x555584473790 /* 0 entries */, 32768) = 0
[pid   304] close(4)                    = 0
[pid   304] rmdir("./0/.index")         = 0
[   31.741229][   T30] audit: type=1400 audit(1793257442.139:71): avc:  denied  { mounton } for  pid=304 comm="syz-executor117" path="/root/syzkaller.HUlb9E/syz-tmp/newroot/sys/kernel/debug" dev="debugfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:debugfs_t tclass=dir permissive=1
[   31.772193][   T30] audit: type=1400 audit(1793257442.159:72): avc:  denied  { mounton } for  pid=304 comm="syz-executor117" path="/root/syzkaller.HUlb9E/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=550 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   31.799779][   T30] audit: type=1400 audit(1793257442.159:73): avc:  denied  { unmount } for  pid=304 comm="syz-executor117" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   31.800295][  T304] ------------[ cut here ]------------
[   31.825002][  T304] WARNING: CPU: 0 PID: 304 at fs/inode.c:335 drop_nlink+0xc5/0x110
[   31.832974][  T304] Modules linked in:
[   31.836931][  T304] CPU: 0 PID: 304 Comm: syz-executor117 Not tainted syzkaller #0
[   31.844731][  T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   31.854872][  T304] RIP: 0010:drop_nlink+0xc5/0x110
[   31.859958][  T304] Code: 1b 48 8d bb b8 04 00 00 be 08 00 00 00 e8 33 05 f2 ff f0 48 ff 83 b8 04 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 9b 68 b2 ff <0f> 0b eb 86 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 5e ff ff ff 4c
[   31.879611][  T304] RSP: 0018:ffffc900007dfbd0 EFLAGS: 00010293
[   31.885686][  T304] RAX: ffffffff81b76e65 RBX: ffff888122ba8440 RCX: ffff8881057e3c00
[   31.893881][  T304] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   31.901913][  T304] RBP: ffffc900007dfbf8 R08: 0000000000000003 R09: 0000000000000004
[   31.909938][  T304] R10: dffffc0000000000 R11: fffff520000fbf68 R12: dffffc0000000000
[   31.917947][  T304] R13: 1ffff11024575091 R14: ffff888122ba8488 R15: 0000000000000000
[   31.925920][  T304] FS:  000055558446a3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[   31.934921][  T304] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.941615][  T304] CR2: 000055558447b798 CR3: 0000000122b5e000 CR4: 00000000003506b0
[   31.949826][  T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.957833][  T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.965828][  T304] Call Trace:
[   31.969152][  T304]  <TASK>
[   31.972106][  T304]  shmem_rmdir+0x5b/0x90
[   31.976358][  T304]  vfs_rmdir+0x1ae/0x450
[   31.980646][  T304]  incfs_kill_sb+0xfe/0x210
[   31.985194][  T304]  deactivate_locked_super+0xa0/0x100
[   31.990655][  T304]  deactivate_super+0xaf/0xe0
[   31.995378][  T304]  cleanup_mnt+0x44f/0x500
[   32.000095][  T304]  __cleanup_mnt+0x19/0x20
[   32.004538][  T304]  task_work_run+0x127/0x190
[   32.009231][  T304]  ptrace_notify+0x230/0x270
[   32.013854][  T304]  ? do_notify_parent+0x830/0x830
[   32.018930][  T304]  ? user_path_at_empty+0x162/0x1c0
[   32.024168][  T304]  ? __x64_sys_umount+0x12d/0x170
[   32.029245][  T304]  ? path_umount+0xfa0/0xfa0
[   32.033862][  T304]  syscall_exit_work+0x87/0x160
[   32.038767][  T304]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   32.044956][  T304]  syscall_exit_to_user_mode+0xd/0x30
[   32.050379][  T304]  do_syscall_64+0x58/0xa0
[   32.054820][  T304]  ? clear_bhb_loop+0x50/0xa0
[   32.059556][  T304]  ? clear_bhb_loop+0x50/0xa0
[   32.064269][  T304]  entry_SYSCALL_64_after_hwframe+0x66/0xd0
[   32.070214][  T304] RIP: 0033:0x7f1008c90527
[   32.074660][  T304] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 85 09 00 00 00 00 00 eb 96 e8 b1 05 00 00 90 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8
[   32.094323][  T304] RSP: 002b:00007ffc4af53d08 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
[   32.102777][  T304] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1008c90527
[   32.110798][  T304] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc4af53dc0
[   32.118808][  T304] RBP: 00007ffc4af53dc0 R08: 00007ffc4af54dc0 R09: 00000000ffffffff
[   32.126782][  T304] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc4af54e30
[   32.134806][  T304] R13: 000055558446b720 R14: 00007ffc4af54e30 R15: 0000000000000001
[   32.142820][  T304]  </TASK>
[   32.145841][  T304] ---[ end trace bc5267dc3cfc46fe ]---
[   32.151403][  T304] ==================================================================
[   32.159485][  T304] BUG: KASAN: null-ptr-deref in ihold+0x20/0x60
[   32.165750][  T304] Write of size 4 at addr 0000000000000170 by task syz-executor117/304
[   32.173992][  T304] 
[   32.176331][  T304] CPU: 0 PID: 304 Comm: syz-executor117 Tainted: G        W         syzkaller #0
[   32.185438][  T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   32.195491][  T304] Call Trace:
[   32.198771][  T304]  <TASK>
[   32.201885][  T304]  __dump_stack+0x21/0x30
[   32.206225][  T304]  dump_stack_lvl+0x110/0x170
[   32.210944][  T304]  ? show_regs_print_info+0x20/0x20
[   32.216150][  T304]  ? _raw_spin_lock+0x94/0xf0
[   32.220832][  T304]  ? _raw_spin_trylock_bh+0x150/0x150
[   32.226241][  T304]  ? ihold+0x20/0x60
[   32.230136][  T304]  kasan_report+0xcc/0x150
[   32.234553][  T304]  ? ihold+0x20/0x60
[   32.238449][  T304]  kasan_check_range+0x249/0x2a0
[   32.243390][  T304]  __kasan_check_write+0x14/0x20
[   32.248336][  T304]  ihold+0x20/0x60
[   32.252058][  T304]  vfs_rmdir+0x23d/0x450
[   32.256333][  T304]  incfs_kill_sb+0xfe/0x210
[   32.260837][  T304]  deactivate_locked_super+0xa0/0x100
[   32.266227][  T304]  deactivate_super+0xaf/0xe0
[   32.270906][  T304]  cleanup_mnt+0x44f/0x500
[   32.275499][  T304]  __cleanup_mnt+0x19/0x20
[   32.279927][  T304]  task_work_run+0x127/0x190
[   32.284548][  T304]  ptrace_notify+0x230/0x270
[   32.289152][  T304]  ? do_notify_parent+0x830/0x830
[   32.294200][  T304]  ? user_path_at_empty+0x162/0x1c0
[   32.299402][  T304]  ? __x64_sys_umount+0x12d/0x170
[   32.304429][  T304]  ? path_umount+0xfa0/0xfa0
[   32.309026][  T304]  syscall_exit_work+0x87/0x160
[   32.313879][  T304]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   32.320036][  T304]  syscall_exit_to_user_mode+0xd/0x30
[   32.325429][  T304]  do_syscall_64+0x58/0xa0
[   32.329868][  T304]  ? clear_bhb_loop+0x50/0xa0
[   32.334548][  T304]  ? clear_bhb_loop+0x50/0xa0
[   32.339372][  T304]  entry_SYSCALL_64_after_hwframe+0x66/0xd0
[   32.345279][  T304] RIP: 0033:0x7f1008c90527
[   32.349710][  T304] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 85 09 00 00 00 00 00 eb 96 e8 b1 05 00 00 90 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8
[   32.369324][  T304] RSP: 002b:00007ffc4af53d08 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
[   32.377741][  T304] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1008c90527
[   32.385712][  T304] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc4af53dc0
[   32.393688][  T304] RBP: 00007ffc4af53dc0 R08: 00007ffc4af54dc0 R09: 00000000ffffffff
[   32.401664][  T304] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc4af54e30
[   32.409636][  T304] R13: 000055558446b720 R14: 00007ffc4af54e30 R15: 0000000000000001
[   32.417611][  T304]  </TASK>
[   32.420633][  T304] ==================================================================
[   32.428687][  T304] Disabling lock debugging due to kernel taint
[   32.434988][  T304] BUG: kernel NULL pointer dereference, address: 0000000000000170
[   32.442812][  T304] #PF: supervisor write access in kernel mode
[   32.448890][  T304] #PF: error_code(0x0002) - not-present page
[   32.454883][  T304] PGD 0 P4D 0 
[   32.458262][  T304] Oops: 0002 [#1] PREEMPT SMP KASAN
[   32.463460][  T304] CPU: 0 PID: 304 Comm: syz-executor117 Tainted: G    B   W         syzkaller #0
[   32.472565][  T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   32.483362][  T304] RIP: 0010:ihold+0x26/0x60
[   32.487894][  T304] Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 b1 60 b2 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 20 fd f1 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 31
[   32.507520][  T304] RSP: 0018:ffffc900007dfc10 EFLAGS: 00010246
[   32.513617][  T304] RAX: ffff8881057e3c00 RBX: 0000000000000000 RCX: ffff8881057e3c00
[   32.521589][  T304] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
[   32.529570][  T304] RBP: ffffc900007dfc20 R08: 0000000000000003 R09: 0000000000000004
[   32.537565][  T304] R10: dffffc0000000000 R11: fffffbfff0e1904c R12: 1ffff1102234e26c
[   32.545556][  T304] R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
[   32.553561][  T304] FS:  000055558446a3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[   32.562512][  T304] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.569110][  T304] CR2: 0000000000000170 CR3: 0000000122b5e000 CR4: 00000000003506b0
[   32.577105][  T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.585086][  T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.593086][  T304] Call Trace:
[   32.596375][  T304]  <TASK>
[   32.599330][  T304]  vfs_rmdir+0x23d/0x450
[   32.603600][  T304]  incfs_kill_sb+0xfe/0x210
[   32.608120][  T304]  deactivate_locked_super+0xa0/0x100
[   32.613506][  T304]  deactivate_super+0xaf/0xe0
[   32.618199][  T304]  cleanup_mnt+0x44f/0x500
[   32.622628][  T304]  __cleanup_mnt+0x19/0x20
[   32.627056][  T304]  task_work_run+0x127/0x190
[   32.631665][  T304]  ptrace_notify+0x230/0x270
[   32.636307][  T304]  ? do_notify_parent+0x830/0x830
[   32.641345][  T304]  ? user_path_at_empty+0x162/0x1c0
[   32.646559][  T304]  ? __x64_sys_umount+0x12d/0x170
[   32.651593][  T304]  ? path_umount+0xfa0/0xfa0
[   32.656200][  T304]  syscall_exit_work+0x87/0x160
[   32.661062][  T304]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   32.667229][  T304]  syscall_exit_to_user_mode+0xd/0x30
[   32.672615][  T304]  do_syscall_64+0x58/0xa0
[   32.677042][  T304]  ? clear_bhb_loop+0x50/0xa0
[   32.681738][  T304]  ? clear_bhb_loop+0x50/0xa0
[   32.686445][  T304]  entry_SYSCALL_64_after_hwframe+0x66/0xd0
[   32.692355][  T304] RIP: 0033:0x7f1008c90527
[   32.696781][  T304] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 85 09 00 00 00 00 00 eb 96 e8 b1 05 00 00 90 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8
[   32.716397][  T304] RSP: 002b:00007ffc4af53d08 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
[   32.724832][  T304] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1008c90527
[   32.732833][  T304] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc4af53dc0
[   32.740828][  T304] RBP: 00007ffc4af53dc0 R08: 00007ffc4af54dc0 R09: 00000000ffffffff
[   32.748813][  T304] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc4af54e30
[   32.756799][  T304] R13: 000055558446b720 R14: 00007ffc4af54e30 R15: 0000000000000001
[   32.764791][  T304]  </TASK>
[   32.767828][  T304] Modules linked in:
[   32.771751][  T304] CR2: 0000000000000170
[   32.775924][  T304] ---[ end trace bc5267dc3cfc46ff ]---
[   32.781393][  T304] RIP: 0010:ihold+0x26/0x60
[   32.785916][  T304] Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 b1 60 b2 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 20 fd f1 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 31
[   32.805738][  T304] RSP: 0018:ffffc900007dfc10 EFLAGS: 00010246
[   32.811824][  T304] RAX: ffff8881057e3c00 RBX: 0000000000000000 RCX: ffff8881057e3c00
[   32.819819][  T304] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
[   32.827805][  T304] RBP: ffffc900007dfc20 R08: 0000000000000003 R09: 0000000000000004
[   32.835785][  T304] R10: dffffc0000000000 R11: fffffbfff0e1904c R12: 1ffff1102234e26c
[   32.843775][  T304] R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
[   32.851760][  T304] FS:  000055558446a3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[   32.860707][  T304] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.867297][  T304] CR2: 0000000000000170 CR3: 0000000122b5e000 CR4: 00000000003506b0
[   32.875282][  T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.883264][  T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.891250][  T304] Kernel panic - not syncing: Fatal exception
[   32.897425][  T304] Kernel Offset: disabled
[   32.901765][  T304] Rebooting in 86400 seconds..