ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor4202260423

<...>

syzkaller
syzkaller login: [   15.336212][   T28] kauditd_printk_skb: 48 callbacks suppressed
[   15.336225][   T28] audit: type=1400 audit(1792221996.441:59): avc:  denied  { transition } for  pid=225 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
[   15.340268][   T28] audit: type=1400 audit(1792221996.441:60): avc:  denied  { noatsecure } for  pid=225 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   15.343521][   T28] audit: type=1400 audit(1792221996.441:61): avc:  denied  { write } for  pid=225 comm="sh" path="pipe:[14276]" dev="pipefs" ino=14276 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1
[   15.346562][   T28] audit: type=1400 audit(1792221996.441:62): avc:  denied  { rlimitinh } for  pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   15.349093][   T28] audit: type=1400 audit(1792221996.441:63): avc:  denied  { siginh } for  pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   16.847903][  T232] sshd-session (232) used greatest stack depth: 21408 bytes left
Warning: Permanently added '10.128.0.200' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor4202260423", ["ci2-android-6-1/syz-executor4202260423"], 0x7ffe749a8f00 /* 10 vars */) = 0
brk(NULL)                               = 0x55556bcb4000
brk(0x55556bcb4d40)                     = 0x55556bcb4d40
arch_prctl(ARCH_SET_FS, 0x55556bcb43c0) = 0
set_tid_address(0x55556bcb4690)         = 305
set_robust_list(0x55556bcb46a0, 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-6-1/syz-executor4202260423", 4096) = 44
getrandom("\x3c\x3f\x90\x7b\x08\x4d\x16\xf7", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55556bcb4d40
brk(0x55556bcd5d40)                     = 0x55556bcd5d40
brk(0x55556bcd6000)                     = 0x55556bcd6000
mprotect(0x7f8029def000, 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("\x1c\x23\xfe\xe2\x4c\xff\x33\x65", 8, GRND_NONBLOCK) = 8
mkdir("./syzkaller.0Kwvmq", 0700)       = 0
chmod("./syzkaller.0Kwvmq", 0777)       = 0
chdir("./syzkaller.0Kwvmq")             = 0
unshare(CLONE_NEWPID)                   = 0
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556bcb4690) = 306
ci2-android-6-1/strace-static-x86_64: Process 306 attached
[pid   305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   306] set_robust_list(0x55556bcb46a0, 24) = 0
[pid   306] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   306] getppid()                   = 0
[pid   306] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid   306] unshare(CLONE_NEWNS)        = 0
[pid   306] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] unshare(CLONE_NEWIPC)       = -1 EINVAL (Invalid argument)
[pid   306] unshare(CLONE_NEWCGROUP)    = 0
[pid   306] unshare(CLONE_NEWUTS)       = 0
[pid   306] unshare(CLONE_SYSVSEM)      = 0
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] getpid()                    = 1
[pid   306] 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   306] 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   306] unshare(CLONE_NEWNET)       = 0
[pid   306] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid   306] write(3, "0 65535", 7)      = 7
[pid   306] close(3)                    = 0
[pid   306] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid   306] write(3, "100000", 6)       = 6
[pid   306] close(3)                    = 0
[pid   306] mkdir("./syz-tmp", 0777)    = 0
[pid   306] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot", 0777) = 0
[pid   306] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid   306] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid   306] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid   306] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   306] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid   306] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] 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   306] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid   306] 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   306] mkdir("./syz-tmp/pivot", 0777) = 0
[pid   306] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid   306] chdir("/")                  = 0
[pid   306] umount2("./pivot", MNT_DETACH) = 0
[pid   306] chroot("./newroot")         = 0
[pid   306] chdir("/")                  = 0
[pid   306] mkdir("/dev/gadgetfs", 0777) = 0
[   24.763997][   T28] audit: type=1400 audit(1792222005.871:64): avc:  denied  { execmem } for  pid=305 comm="syz-executor420" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   24.785632][   T28] audit: type=1400 audit(1792222005.891:65): avc:  denied  { mounton } for  pid=306 comm="syz-executor420" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1
[   24.807213][   T28] audit: type=1400 audit(1792222005.891:66): avc:  denied  { mounton } for  pid=306 comm="syz-executor420" path="/root/syzkaller.0Kwvmq/syz-tmp" dev="sda1" ino=2026 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[   24.809665][  T306] request_module fs-gadgetfs succeeded, but still no fs?
[   24.831722][   T28] audit: type=1400 audit(1792222005.891:67): avc:  denied  { mount } for  pid=306 comm="syz-executor420" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[   24.831746][   T28] audit: type=1400 audit(1792222005.891:68): avc:  denied  { mounton } for  pid=306 comm="syz-executor420" path="/root/syzkaller.0Kwvmq/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
[   24.831765][   T28] audit: type=1400 audit(1792222005.891:69): avc:  denied  { mount } for  pid=306 comm="syz-executor420" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   24.831782][   T28] audit: type=1400 audit(1792222005.891:70): avc:  denied  { mounton } for  pid=306 comm="syz-executor420" path="/root/syzkaller.0Kwvmq/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
[   24.831801][   T28] audit: type=1400 audit(1792222005.891:71): avc:  denied  { mounton } for  pid=306 comm="syz-executor420" path="/root/syzkaller.0Kwvmq/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=14702 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[pid   306] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = -1 ENODEV (No such device)
[pid   306] mkdir("/dev/binderfs", 0777) = 0
[pid   306] mount("binder", "/dev/binderfs", "binder", 0, "stats=global") = 0
[pid   306] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid   306] mkdir("./0", 0777)          = 0
[pid   306] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   306] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556bcb4690) = 2
[pid   306] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 307 attached
[pid   307] set_robust_list(0x55556bcb46a0, 24) = 0
[pid   307] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   307] chdir("./0")                = 0
[pid   307] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   307] setpgid(0, 0)               = 0
[pid   307] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   307] write(3, "1000", 4)         = 4
[pid   307] close(3)                    = 0
[pid   307] symlink("/dev/binderfs", "./binderfs") = 0
[pid   307] write(1, "executing program\n", 18) = 18
executing program
[pid   307] mkdir("./bus", 000)         = 0
[   24.831821][   T28] audit: type=1400 audit(1792222005.891:72): avc:  denied  { unmount } for  pid=306 comm="syz-executor420" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   24.831839][   T28] audit: type=1400 audit(1792222005.921:73): avc:  denied  { mounton } for  pid=306 comm="syz-executor420" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[pid   307] mount(".", "./bus", "incremental-fs", MS_NOSUID|MS_REC|MS_SILENT, NULL) = 0
[pid   307] close(3)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(4)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   307] exit_group(0)               = ?
[pid   307] +++ exited with 0 +++
[pid   306] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
[pid   306] restart_syscall(<... resuming interrupted rt_sigprocmask ...>) = 0
[pid   306] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   306] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
[pid   306] fstat(3, {st_mode=S_IFDIR|0700, st_size=120, ...}) = 0
[pid   306] getdents64(3, 0x55556bcb5750 /* 6 entries */, 32768) = 168
[pid   306] umount2("./0/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   306] newfstatat(AT_FDCWD, "./0/.incomplete", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   306] umount2("./0/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   306] openat(AT_FDCWD, "./0/.incomplete", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   306] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   306] getdents64(4, 0x55556bcbd790 /* 2 entries */, 32768) = 48
[pid   306] getdents64(4, 0x55556bcbd790 /* 0 entries */, 32768) = 0
[pid   306] close(4)                    = 0
[pid   306] rmdir("./0/.incomplete")    = 0
[pid   306] umount2("./0/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   306] newfstatat(AT_FDCWD, "./0/.index", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   306] umount2("./0/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   306] openat(AT_FDCWD, "./0/.index", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   306] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   306] getdents64(4, 0x55556bcbd790 /* 2 entries */, 32768) = 48
[pid   306] getdents64(4, 0x55556bcbd790 /* 0 entries */, 32768) = 0
[pid   306] close(4)                    = 0
[pid   306] rmdir("./0/.index")         = 0
[   25.010587][  T307] incfs: ino conflict with backing FS 9
[   25.031290][  T306] ------------[ cut here ]------------
[   25.036826][  T306] WARNING: CPU: 1 PID: 306 at fs/inode.c:335 drop_nlink+0xc5/0x110
[   25.044773][  T306] Modules linked in:
[   25.048661][  T306] CPU: 1 PID: 306 Comm: syz-executor420 Not tainted syzkaller #0
[   25.056388][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   25.066445][  T306] RIP: 0010:drop_nlink+0xc5/0x110
[   25.071457][  T306] Code: 1b 48 8d bb b8 04 00 00 be 08 00 00 00 e8 03 aa f0 ff f0 48 ff 83 b8 04 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 7b 0d ab ff <0f> 0b eb 86 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 5e ff ff ff 4c
[   25.091109][  T306] RSP: 0018:ffffc90000db7b60 EFLAGS: 00010293
[   25.097180][  T306] RAX: ffffffff81c660c5 RBX: ffff88811d7d8448 RCX: ffff88810fb0a880
[   25.105157][  T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   25.113131][  T306] RBP: ffffc90000db7b88 R08: 0000000000000003 R09: 0000000000000004
[   25.121095][  T306] R10: dffffc0000000000 R11: fffff520001b6f5c R12: dffffc0000000000
[   25.129105][  T306] R13: 1ffff11023afb092 R14: ffff88811d7d8490 R15: 0000000000000000
[   25.137094][  T306] FS:  000055556bcb43c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
[   25.146040][  T306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.152639][  T306] CR2: 000055556bcc5798 CR3: 0000000123140000 CR4: 00000000003506a0
[   25.160606][  T306] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   25.168582][  T306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   25.176573][  T306] Call Trace:
[   25.179832][  T306]  <TASK>
[   25.182762][  T306]  shmem_rmdir+0x5b/0x90
[   25.187043][  T306]  vfs_rmdir+0x381/0x4f0
[   25.191263][  T306]  incfs_kill_sb+0xfe/0x210
[   25.195780][  T306]  deactivate_locked_super+0xb5/0x120
[   25.201148][  T306]  deactivate_super+0xaf/0xe0
[   25.205829][  T306]  cleanup_mnt+0x45e/0x4e0
[   25.210245][  T306]  __cleanup_mnt+0x19/0x20
[   25.214662][  T306]  task_work_run+0x1e1/0x250
[   25.219258][  T306]  ? __cfi_task_work_run+0x10/0x10
[   25.224375][  T306]  ? path_umount+0x345/0xf60
[   25.228961][  T306]  ? __kasan_slab_free+0x11/0x20
[   25.233908][  T306]  ptrace_notify+0x23f/0x270
[   25.238516][  T306]  ? __cfi_path_umount+0x10/0x10
[   25.243504][  T306]  ? __cfi_ptrace_notify+0x10/0x10
[   25.248623][  T306]  ? user_path_at_empty+0x162/0x1c0
[   25.253843][  T306]  ? __x64_sys_umount+0x12d/0x170
[   25.258869][  T306]  ? __cfi___x64_sys_umount+0x10/0x10
[   25.264253][  T306]  ? fpregs_restore_userregs+0x128/0x260
[   25.269882][  T306]  syscall_exit_work+0x84/0x140
[   25.274765][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.280910][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   25.286295][  T306]  do_syscall_64+0x58/0xa0
[   25.290700][  T306]  ? clear_bhb_loop+0x30/0x80
[   25.295380][  T306]  ? clear_bhb_loop+0x30/0x80
[   25.300050][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.306004][  T306] RIP: 0033:0x7f8029d5c527
[   25.310432][  T306] 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
[   25.330054][  T306] RSP: 002b:00007ffc0c715d18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
[   25.338480][  T306] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8029d5c527
[   25.346472][  T306] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc0c715dd0
[   25.354450][  T306] RBP: 00007ffc0c715dd0 R08: 00007ffc0c716dd0 R09: 00000000ffffffff
[   25.362443][  T306] R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc0c716e40
[   25.370407][  T306] R13: 000055556bcb5720 R14: 00007ffc0c716e40 R15: 0000000000000001
[   25.378388][  T306]  </TASK>
[   25.381395][  T306] ---[ end trace 0000000000000000 ]---
[   25.386903][  T306] ==================================================================
[   25.394951][  T306] BUG: KASAN: null-ptr-deref in ihold+0x20/0x60
[   25.401189][  T306] Write of size 4 at addr 0000000000000170 by task syz-executor420/306
[   25.409399][  T306] 
[   25.411702][  T306] CPU: 1 PID: 306 Comm: syz-executor420 Tainted: G        W          syzkaller #0
[   25.420865][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   25.430896][  T306] Call Trace:
[   25.434152][  T306]  <TASK>
[   25.437079][  T306]  __dump_stack+0x21/0x24
[   25.441388][  T306]  dump_stack_lvl+0x110/0x170
[   25.446046][  T306]  ? __cfi_dump_stack_lvl+0x8/0x8
[   25.451073][  T306]  ? __cfi_call_rcu+0x10/0x10
[   25.455725][  T306]  ? ihold+0x20/0x60
[   25.459612][  T306]  ? ihold+0x20/0x60
[   25.463481][  T306]  print_report+0x3d/0x60
[   25.467789][  T306]  kasan_report+0x122/0x150
[   25.472271][  T306]  ? ihold+0x20/0x60
[   25.476145][  T306]  kasan_check_range+0x249/0x2a0
[   25.481069][  T306]  __kasan_check_write+0x14/0x20
[   25.485992][  T306]  ihold+0x20/0x60
[   25.489692][  T306]  vfs_rmdir+0x24c/0x4f0
[   25.493912][  T306]  incfs_kill_sb+0xfe/0x210
[   25.498394][  T306]  deactivate_locked_super+0xb5/0x120
[   25.503743][  T306]  deactivate_super+0xaf/0xe0
[   25.508395][  T306]  cleanup_mnt+0x45e/0x4e0
[   25.512787][  T306]  __cleanup_mnt+0x19/0x20
[   25.517177][  T306]  task_work_run+0x1e1/0x250
[   25.521740][  T306]  ? __cfi_task_work_run+0x10/0x10
[   25.526826][  T306]  ? path_umount+0x345/0xf60
[   25.531397][  T306]  ? __kasan_slab_free+0x11/0x20
[   25.536309][  T306]  ptrace_notify+0x23f/0x270
[   25.540875][  T306]  ? __cfi_path_umount+0x10/0x10
[   25.545790][  T306]  ? __cfi_ptrace_notify+0x10/0x10
[   25.550879][  T306]  ? user_path_at_empty+0x162/0x1c0
[   25.556053][  T306]  ? __x64_sys_umount+0x12d/0x170
[   25.561058][  T306]  ? __cfi___x64_sys_umount+0x10/0x10
[   25.566411][  T306]  ? fpregs_restore_userregs+0x128/0x260
[   25.572032][  T306]  syscall_exit_work+0x84/0x140
[   25.576864][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.582994][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   25.588343][  T306]  do_syscall_64+0x58/0xa0
[   25.592734][  T306]  ? clear_bhb_loop+0x30/0x80
[   25.597391][  T306]  ? clear_bhb_loop+0x30/0x80
[   25.602052][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.607920][  T306] RIP: 0033:0x7f8029d5c527
[   25.612310][  T306] 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
[   25.631889][  T306] RSP: 002b:00007ffc0c715d18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
[   25.640278][  T306] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8029d5c527
[   25.648224][  T306] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc0c715dd0
[   25.656170][  T306] RBP: 00007ffc0c715dd0 R08: 00007ffc0c716dd0 R09: 00000000ffffffff
[   25.664122][  T306] R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc0c716e40
[   25.672077][  T306] R13: 000055556bcb5720 R14: 00007ffc0c716e40 R15: 0000000000000001
[   25.680029][  T306]  </TASK>
[   25.683029][  T306] ==================================================================
[   25.691139][  T306] Disabling lock debugging due to kernel taint
[   25.697362][  T306] BUG: kernel NULL pointer dereference, address: 0000000000000170
[   25.705141][  T306] #PF: supervisor write access in kernel mode
[   25.711180][  T306] #PF: error_code(0x0002) - not-present page
[   25.717130][  T306] PGD 0 P4D 0 
[   25.720480][  T306] Oops: 0002 [#1] PREEMPT SMP KASAN
[   25.725652][  T306] CPU: 1 PID: 306 Comm: syz-executor420 Tainted: G    B   W          syzkaller #0
[   25.734817][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   25.744847][  T306] RIP: 0010:ihold+0x26/0x60
[   25.749331][  T306] Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 e1 04 ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 40 a1 f0 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 d1
[   25.768910][  T306] RSP: 0018:ffffc90000db7ba0 EFLAGS: 00010246
[   25.774955][  T306] RAX: ffff88810fb0a800 RBX: 0000000000000000 RCX: ffff88810fb0a880
[   25.782904][  T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   25.790855][  T306] RBP: ffffc90000db7bb0 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
[   25.798802][  T306] R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: ffff88811d7d8454
[   25.806746][  T306] R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
[   25.814692][  T306] FS:  000055556bcb43c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
[   25.823595][  T306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.830152][  T306] CR2: 0000000000000170 CR3: 0000000123140000 CR4: 00000000003506a0
[   25.838101][  T306] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   25.846047][  T306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   25.854011][  T306] Call Trace:
[   25.857266][  T306]  <TASK>
[   25.860171][  T306]  vfs_rmdir+0x24c/0x4f0
[   25.864408][  T306]  incfs_kill_sb+0xfe/0x210
[   25.868887][  T306]  deactivate_locked_super+0xb5/0x120
[   25.874241][  T306]  deactivate_super+0xaf/0xe0
[   25.878894][  T306]  cleanup_mnt+0x45e/0x4e0
[   25.883281][  T306]  __cleanup_mnt+0x19/0x20
[   25.887678][  T306]  task_work_run+0x1e1/0x250
[   25.892243][  T306]  ? __cfi_task_work_run+0x10/0x10
[   25.897330][  T306]  ? path_umount+0x345/0xf60
[   25.901901][  T306]  ? __kasan_slab_free+0x11/0x20
[   25.906814][  T306]  ptrace_notify+0x23f/0x270
[   25.911379][  T306]  ? __cfi_path_umount+0x10/0x10
[   25.916293][  T306]  ? __cfi_ptrace_notify+0x10/0x10
[   25.921382][  T306]  ? user_path_at_empty+0x162/0x1c0
[   25.926560][  T306]  ? __x64_sys_umount+0x12d/0x170
[   25.931569][  T306]  ? __cfi___x64_sys_umount+0x10/0x10
[   25.936932][  T306]  ? fpregs_restore_userregs+0x128/0x260
[   25.942550][  T306]  syscall_exit_work+0x84/0x140
[   25.947386][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.953519][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   25.958878][  T306]  do_syscall_64+0x58/0xa0
[   25.963274][  T306]  ? clear_bhb_loop+0x30/0x80
[   25.967935][  T306]  ? clear_bhb_loop+0x30/0x80
[   25.972592][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.978467][  T306] RIP: 0033:0x7f8029d5c527
[   25.982861][  T306] 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
[   26.002445][  T306] RSP: 002b:00007ffc0c715d18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
[   26.010841][  T306] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8029d5c527
[   26.018791][  T306] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc0c715dd0
[   26.026740][  T306] RBP: 00007ffc0c715dd0 R08: 00007ffc0c716dd0 R09: 00000000ffffffff
[   26.034696][  T306] R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc0c716e40
[   26.042648][  T306] R13: 000055556bcb5720 R14: 00007ffc0c716e40 R15: 0000000000000001
[   26.050605][  T306]  </TASK>
[   26.053603][  T306] Modules linked in:
[   26.057488][  T306] CR2: 0000000000000170
[   26.061621][  T306] ---[ end trace 0000000000000000 ]---
[   26.067052][  T306] RIP: 0010:ihold+0x26/0x60
[   26.071547][  T306] Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 e1 04 ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 40 a1 f0 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 d1
[   26.091130][  T306] RSP: 0018:ffffc90000db7ba0 EFLAGS: 00010246
[   26.097177][  T306] RAX: ffff88810fb0a800 RBX: 0000000000000000 RCX: ffff88810fb0a880
[   26.105130][  T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   26.113080][  T306] RBP: ffffc90000db7bb0 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
[   26.121031][  T306] R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: ffff88811d7d8454
[   26.128983][  T306] R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
[   26.136934][  T306] FS:  000055556bcb43c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
[   26.145841][  T306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.152404][  T306] CR2: 0000000000000170 CR3: 0000000123140000 CR4: 00000000003506a0
[   26.160356][  T306] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.168307][  T306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.176259][  T306] Kernel panic - not syncing: Fatal exception
[   26.182515][  T306] Kernel Offset: disabled
[   26.186823][  T306] Rebooting in 86400 seconds..