ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor1606991293

<...>


syzkaller
syzkaller login: [   22.312081][   T28] kauditd_printk_skb: 31 callbacks suppressed
[   22.312096][   T28] audit: type=1400 audit(1790033227.306:59): avc:  denied  { transition } for  pid=266 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
[   22.316607][   T28] audit: type=1400 audit(1790033227.306:60): avc:  denied  { noatsecure } for  pid=266 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   22.320368][   T28] audit: type=1400 audit(1790033227.306:61): avc:  denied  { write } for  pid=266 comm="sh" path="pipe:[11711]" dev="pipefs" ino=11711 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1
[   22.323751][   T28] audit: type=1400 audit(1790033227.306:62): avc:  denied  { rlimitinh } for  pid=266 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   22.326620][   T28] audit: type=1400 audit(1790033227.306:63): avc:  denied  { siginh } for  pid=266 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
Warning: Permanently added '10.128.0.168' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor1606991293", ["ci2-android-6-1/syz-executor1606991293"], 0x7ffd8a5226e0 /* 10 vars */) = 0
brk(NULL)                               = 0x5555570f5000
brk(0x5555570f5d40)                     = 0x5555570f5d40
arch_prctl(ARCH_SET_FS, 0x5555570f53c0) = 0
set_tid_address(0x5555570f5690)         = 304
set_robust_list(0x5555570f56a0, 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-executor1606991293", 4096) = 44
getrandom("\x09\x24\xaa\xd2\xbe\x99\xb3\xa8", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x5555570f5d40
brk(0x555557116d40)                     = 0x555557116d40
brk(0x555557117000)                     = 0x555557117000
mprotect(0x7f1a01d08000, 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("\x08\x53\xe6\x37\x29\x90\x69\xa9", 8, GRND_NONBLOCK) = 8
mkdir("./syzkaller.A7jkfi", 0700)       = 0
chmod("./syzkaller.A7jkfi", 0777)       = 0
chdir("./syzkaller.A7jkfi")             = 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=0x5555570f5690) = 305
ci2-android-6-1/strace-static-x86_64: Process 305 attached
[pid   304] rt_sigprocmask(SIG_SETMASK, [] <unfinished ...>
[pid   305] set_robust_list(0x5555570f56a0, 24) = 0
[pid   305] rt_sigprocmask(SIG_SETMASK, [] <unfinished ...>
[pid   304] <... rt_sigprocmask resumed>, NULL, 8) = 0
[pid   305] <... rt_sigprocmask resumed>, NULL, 8) = 0
[pid   305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   305] getppid()                   = 0
[pid   305] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid   305] unshare(CLONE_NEWNS)        = 0
[pid   305] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] unshare(CLONE_NEWIPC)       = -1 EINVAL (Invalid argument)
[pid   305] unshare(CLONE_NEWCGROUP)    = 0
[pid   305] unshare(CLONE_NEWUTS)       = 0
[pid   305] unshare(CLONE_SYSVSEM)      = 0
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] getpid()                    = 1
[pid   305] 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   305] 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   305] unshare(CLONE_NEWNET)       = 0
[pid   305] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid   305] write(3, "0 65535", 7)      = 7
[pid   305] close(3)                    = 0
[pid   305] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid   305] write(3, "100000", 6)       = 6
[pid   305] close(3)                    = 0
[pid   305] mkdir("./syz-tmp", 0777)    = 0
[pid   305] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[   32.659567][   T28] audit: type=1400 audit(1790033237.646:64): avc:  denied  { execmem } for  pid=304 comm="syz-executor160" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   32.681330][   T28] audit: type=1400 audit(1790033237.676:65): avc:  denied  { mounton } for  pid=305 comm="syz-executor160" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1
[pid   305] mkdir("./syz-tmp/newroot", 0777) = 0
[pid   305] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid   305] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid   305] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid   305] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   305] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid   305] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] 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   305] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid   305] 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   305] mkdir("./syz-tmp/pivot", 0777) = 0
[pid   305] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid   305] chdir("/")                  = 0
[pid   305] umount2("./pivot", MNT_DETACH) = 0
[pid   305] chroot("./newroot")         = 0
[pid   305] chdir("/")                  = 0
[   32.715071][   T28] audit: type=1400 audit(1790033237.706:66): avc:  denied  { mounton } for  pid=305 comm="syz-executor160" path="/root/syzkaller.A7jkfi/syz-tmp" dev="sda1" ino=2026 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[   32.739507][   T28] audit: type=1400 audit(1790033237.706:67): avc:  denied  { mount } for  pid=305 comm="syz-executor160" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[pid   305] mkdir("/dev/gadgetfs", 0777) = 0
[pid   305] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = -1 ENODEV (No such device)
[pid   305] mkdir("/dev/binderfs", 0777) = 0
[pid   305] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0
[pid   305] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid   305] mkdir("./0", 0777)          = 0
[pid   305] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
[pid   305] ioctl(3, LOOP_CLR_FD)       = -1 ENXIO (No such device or address)
[   32.762382][   T28] audit: type=1400 audit(1790033237.706:68): avc:  denied  { mounton } for  pid=305 comm="syz-executor160" path="/root/syzkaller.A7jkfi/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
[   32.769988][  T305] request_module fs-gadgetfs succeeded, but still no fs?
[pid   305] close(3)                    = 0
[pid   305] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   305] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555570f5690) = 2
[pid   305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 307 attached
[pid   307] set_robust_list(0x5555570f56a0, 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] futex(0x7f1a01d0ee2c, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   307] rt_sigaction(SIGRT_1, {sa_handler=0x7f1a01c79210, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f1a01c6b200}, NULL, 8) = 0
[pid   307] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid   307] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1a01c1a000
[pid   307] mprotect(0x7f1a01c1b000, 131072, PROT_READ|PROT_WRITE) = 0
[pid   307] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   307] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f1a01c3a990, parent_tid=0x7f1a01c3a990, exit_signal=0, stack=0x7f1a01c1a000, stack_size=0x20300, tls=0x7f1a01c3a6c0} => {parent_tid=[3]}, 88) = 3
[pid   307] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   307] futex(0x7f1a01d0ee28, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   307] futex(0x7f1a01d0ee3c, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   307] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1a01bf9000
[pid   307] mprotect(0x7f1a01bfa000, 131072, PROT_READ|PROT_WRITE) = 0
[pid   307] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   307] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f1a01c19990, parent_tid=0x7f1a01c19990, exit_signal=0, stack=0x7f1a01bf9000, stack_size=0x20300, tls=0x7f1a01c196c0} => {parent_tid=[4]}, 88) = 4
[pid   307] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   307] futex(0x7f1a01d0ee38, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   32.787702][   T28] audit: type=1400 audit(1790033237.706:69): avc:  denied  { mount } for  pid=305 comm="syz-executor160" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   32.787730][   T28] audit: type=1400 audit(1790033237.706:70): avc:  denied  { mounton } for  pid=305 comm="syz-executor160" path="/root/syzkaller.A7jkfi/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
[pid   307] futex(0x7f1a01d0ee3c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}ci2-android-6-1/strace-static-x86_64: Process 308 attached
 <unfinished ...>
[pid   308] set_robust_list(0x7f1a01c3a9a0, 24) = 0
[pid   308] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 309 attached
[pid   309] set_robust_list(0x7f1a01c199a0, 24 <unfinished ...>
[pid   308] memfd_create("syzkaller", 0) = 3
[pid   308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f19f97f9000
[pid   308] write(3, "\xeb\x76\x90\x45\x58\x46\x41\x54\x20\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x08\x00\x00\x00\x88\x00\x00\x00\x0f\x00\x00\x00\x05\x00\x00\x00"..., 131072) = 131072
[pid   308] munmap(0x7f19f97f9000, 138412032 <unfinished ...>
[pid   309] <... set_robust_list resumed>) = 0
[pid   309] rt_sigprocmask(SIG_SETMASK, [] <unfinished ...>
[pid   308] <... munmap resumed>)       = 0
[pid   308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[   32.842572][   T28] audit: type=1400 audit(1790033237.706:71): avc:  denied  { mounton } for  pid=305 comm="syz-executor160" path="/root/syzkaller.A7jkfi/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
[   32.869553][   T28] audit: type=1400 audit(1790033237.706:72): avc:  denied  { mounton } for  pid=305 comm="syz-executor160" path="/root/syzkaller.A7jkfi/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=15205 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[pid   308] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid   309] <... rt_sigprocmask resumed>, NULL, 8) = 0
[pid   309] mount(".", "./bus", "incremental-fs", MS_NOSUID|MS_REC|MS_STRICTATIME, NULL) = -1 ENOENT (No such file or directory)
[pid   309] futex(0x7f1a01d0ee3c, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid   309] futex(0x7f1a01d0ee38, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid   307] <... futex resumed>)        = 0
[pid   308] <... ioctl resumed>)        = 0
[pid   308] close(3)                    = 0
[pid   308] close(4)                    = 0
[pid   308] mkdir("./bus", 0777)        = 0
[pid   308] mount("/dev/loop0", "./bus", "exfat", MS_RELATIME, "") = 0
[pid   308] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid   308] chdir("./bus")              = 0
[pid   308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   308] ioctl(4, LOOP_CLR_FD)       = 0
[pid   308] close(4)                    = 0
[pid   308] futex(0x7f1a01d0ee2c, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   308] futex(0x7f1a01d0ee28, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid   307] close(3)                    = 0
[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   309] <... futex resumed>)        = ?
[pid   309] +++ exited with 0 +++
[pid   308] <... futex resumed>)        = ?
[pid   308] +++ exited with 0 +++
[pid   307] +++ exited with 0 +++
[pid   305] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} ---
[pid   305] restart_syscall(<... resuming interrupted rt_sigprocmask ...>) = 0
[pid   305] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
[pid   305] fstat(3, {st_mode=S_IFDIR|0700, st_size=80, ...}) = 0
[pid   305] getdents64(3, 0x5555570f6750 /* 4 entries */, 32768) = 104
[pid   305] umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
[pid   305] umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] newfstatat(AT_FDCWD, "./0/bus", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   305] umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] openat(AT_FDCWD, "./0/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   305] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   305] getdents64(4, 0x5555570fe790 /* 2 entries */, 32768) = 48
[pid   305] getdents64(4, 0x5555570fe790 /* 0 entries */, 32768) = 0
[pid   305] close(4)                    = 0
[pid   305] rmdir("./0/bus")            = 0
[pid   305] umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   305] unlink("./0/binderfs")      = 0
[pid   305] getdents64(3, 0x5555570f6750 /* 0 entries */, 32768) = 0
[pid   305] close(3)                    = 0
[pid   305] rmdir("./0")                = 0
[pid   305] mkdir("./1", 0777)          = 0
[pid   305] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
[pid   305] ioctl(3, LOOP_CLR_FD)       = -1 ENXIO (No such device or address)
[pid   305] close(3)                    = 0
[pid   305] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   305] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555570f5690) = 5
[pid   305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 310 attached
[pid   310] set_robust_list(0x5555570f56a0, 24) = 0
[pid   310] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   310] chdir("./1")                = 0
[pid   310] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   310] setpgid(0, 0)               = 0
[pid   310] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid   310] write(3, "1000", 4)         = 4
[pid   310] close(3)                    = 0
[pid   310] symlink("/dev/binderfs", "./binderfs") = 0
[pid   310] write(1, "executing program\n", 18) = 18
[pid   310] futex(0x7f1a01d0ee2c, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   310] rt_sigaction(SIGRT_1, {sa_handler=0x7f1a01c79210, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f1a01c6b200}, NULL, 8) = 0
[pid   310] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
executing program
[pid   310] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1a01c1a000
[pid   310] mprotect(0x7f1a01c1b000, 131072, PROT_READ|PROT_WRITE) = 0
[pid   310] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   310] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f1a01c3a990, parent_tid=0x7f1a01c3a990, exit_signal=0, stack=0x7f1a01c1a000, stack_size=0x20300, tls=0x7f1a01c3a6c0} => {parent_tid=[6]}, 88) = 6
[pid   310] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   310] futex(0x7f1a01d0ee28, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   310] futex(0x7f1a01d0ee3c, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   310] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1a01bf9000
[pid   310] mprotect(0x7f1a01bfa000, 131072, PROT_READ|PROT_WRITE) = 0
[pid   310] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid   310] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f1a01c19990, parent_tid=0x7f1a01c19990, exit_signal=0, stack=0x7f1a01bf9000, stack_size=0x20300, tls=0x7f1a01c196c0} => {parent_tid=[7]}, 88) = 7
[pid   310] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   310] futex(0x7f1a01d0ee38, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   310] futex(0x7f1a01d0ee3c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}ci2-android-6-1/strace-static-x86_64: Process 311 attached
 <unfinished ...>
[pid   311] set_robust_list(0x7f1a01c3a9a0, 24) = 0
[pid   311] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   311] memfd_create("syzkaller", 0) = 3
[pid   311] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f19f97f9000
[   32.897314][   T28] audit: type=1400 audit(1790033237.736:73): avc:  denied  { unmount } for  pid=305 comm="syz-executor160" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   32.901811][  T308] loop0: detected capacity change from 0 to 256
[   32.926039][  T308] exFAT-fs (loop0): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[   32.936894][  T308] exFAT-fs (loop0): Medium has reported failures. Some data may be lost.
[   32.946888][  T308] exFAT-fs (loop0): failed to load upcase table (idx : 0x00010000, chksum : 0xe62de5da, utbl_chksum : 0xe619d30d)
[pid   311] write(3, "\xeb\x76\x90\x45\x58\x46\x41\x54\x20\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x08\x00\x00\x00\x88\x00\x00\x00\x0f\x00\x00\x00\x05\x00\x00\x00"..., 131072) = 131072
[pid   311] munmap(0x7f19f97f9000, 138412032) = 0
[pid   311] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   311] ioctl(4, LOOP_SET_FD, 3ci2-android-6-1/strace-static-x86_64: Process 312 attached
 <unfinished ...>
[pid   312] set_robust_list(0x7f1a01c199a0, 24 <unfinished ...>
[pid   311] <... ioctl resumed>)        = 0
[pid   311] close(3)                    = 0
[pid   311] close(4)                    = 0
[pid   311] mkdir("./bus", 0777)        = 0
[pid   311] mount("/dev/loop0", "./bus", "exfat", MS_RELATIME, "" <unfinished ...>
[pid   312] <... set_robust_list resumed>) = 0
[pid   312] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   312] mount(".", "./bus", "incremental-fs", MS_NOSUID|MS_REC|MS_STRICTATIME, NULL) = 0
[pid   312] futex(0x7f1a01d0ee3c, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid   310] <... futex resumed>)        = 0
[pid   312] <... futex resumed>)        = 1
[pid   312] futex(0x7f1a01d0ee38, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid   311] <... mount resumed>)        = 0
[pid   311] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid   311] chdir("./bus")              = 0
[pid   311] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid   311] ioctl(4, LOOP_CLR_FD)       = 0
[pid   311] close(4)                    = 0
[pid   311] futex(0x7f1a01d0ee2c, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid   311] futex(0x7f1a01d0ee28, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid   310] close(3)                    = 0
[pid   310] close(4)                    = -1 EBADF (Bad file descriptor)
[pid   310] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   310] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   310] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   310] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   310] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   310] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   310] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   310] exit_group(0 <unfinished ...>
[pid   312] <... futex resumed>)        = ?
[pid   311] <... futex resumed>)        = ?
[pid   310] <... exit_group resumed>)   = ?
[pid   312] +++ exited with 0 +++
[pid   311] +++ exited with 0 +++
[pid   310] +++ exited with 0 +++
[pid   305] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
[pid   305] restart_syscall(<... resuming interrupted rt_sigprocmask ...>) = 0
[pid   305] umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
[pid   305] fstat(3, {st_mode=S_IFDIR|0700, st_size=120, ...}) = 0
[pid   305] getdents64(3, 0x5555570f6750 /* 6 entries */, 32768) = 168
[pid   305] umount2("./1/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] newfstatat(AT_FDCWD, "./1/.incomplete", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   305] umount2("./1/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] openat(AT_FDCWD, "./1/.incomplete", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   305] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   305] getdents64(4, 0x5555570fe790 /* 2 entries */, 32768) = 48
[pid   305] getdents64(4, 0x5555570fe790 /* 0 entries */, 32768) = 0
[pid   305] close(4)                    = 0
[pid   305] rmdir("./1/.incomplete")    = 0
[pid   305] umount2("./1/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] newfstatat(AT_FDCWD, "./1/.index", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid   305] umount2("./1/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
[pid   305] openat(AT_FDCWD, "./1/.index", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
[pid   305] fstat(4, {st_mode=S_IFDIR|0700, st_size=40, ...}) = 0
[pid   305] getdents64(4, 0x5555570fe790 /* 2 entries */, 32768) = 48
[pid   305] getdents64(4, 0x5555570fe790 /* 0 entries */, 32768) = 0
[pid   305] close(4)                    = 0
[pid   305] rmdir("./1/.index")         = 0
[pid   305] umount2("./1/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0
[   32.987991][  T311] loop0: detected capacity change from 0 to 256
[   32.997387][  T311] exFAT-fs (loop0): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[   33.008537][  T311] exFAT-fs (loop0): Medium has reported failures. Some data may be lost.
[   33.019381][  T311] exFAT-fs (loop0): failed to load upcase table (idx : 0x00010000, chksum : 0xe62de5da, utbl_chksum : 0xe619d30d)
[   33.055706][  T305] ------------[ cut here ]------------
[   33.061340][  T305] WARNING: CPU: 0 PID: 305 at fs/inode.c:335 drop_nlink+0xc5/0x110
[   33.069289][  T305] Modules linked in:
[   33.073236][  T305] CPU: 0 PID: 305 Comm: syz-executor160 Not tainted syzkaller #0
[   33.080988][  T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   33.091084][  T305] RIP: 0010:drop_nlink+0xc5/0x110
[   33.096133][  T305] Code: 1b 48 8d bb b8 04 00 00 be 08 00 00 00 e8 b3 ac f0 ff f0 48 ff 83 b8 04 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 bb 1e ab ff <0f> 0b eb 86 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 5e ff ff ff 4c
[   33.115780][  T305] RSP: 0018:ffffc90000e57b60 EFLAGS: 00010293
[   33.121883][  T305] RAX: ffffffff81c64b65 RBX: ffff888110386288 RCX: ffff8881101bd100
[   33.129859][  T305] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   33.137863][  T305] RBP: ffffc90000e57b88 R08: 0000000000000003 R09: 0000000000000004
[   33.145863][  T305] R10: dffffc0000000000 R11: fffff520001caf5c R12: dffffc0000000000
[   33.153875][  T305] R13: 1ffff11022070c5a R14: ffff8881103862d0 R15: 0000000000000000
[   33.161901][  T305] FS:  00005555570f53c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
[   33.170826][  T305] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.177444][  T305] CR2: 0000555557106798 CR3: 0000000110498000 CR4: 00000000003506b0
[   33.185452][  T305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.193450][  T305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.201455][  T305] Call Trace:
[   33.204730][  T305]  <TASK>
[   33.207657][  T305]  shmem_rmdir+0x5b/0x90
[   33.211955][  T305]  vfs_rmdir+0x381/0x4f0
[   33.216230][  T305]  incfs_kill_sb+0xfe/0x210
[   33.220738][  T305]  deactivate_locked_super+0xb5/0x120
[   33.226148][  T305]  deactivate_super+0xaf/0xe0
[   33.230885][  T305]  cleanup_mnt+0x45e/0x4e0
[   33.235409][  T305]  __cleanup_mnt+0x19/0x20
[   33.239824][  T305]  task_work_run+0x1e1/0x250
[   33.244475][  T305]  ? __cfi_task_work_run+0x10/0x10
[   33.249635][  T305]  ? path_umount+0x345/0xf60
[   33.254309][  T305]  ? __kasan_slab_free+0x11/0x20
[   33.259281][  T305]  ptrace_notify+0x23f/0x270
[   33.263917][  T305]  ? __cfi_path_umount+0x10/0x10
[   33.268914][  T305]  ? __cfi_ptrace_notify+0x10/0x10
[   33.274091][  T305]  ? user_path_at_empty+0x162/0x1c0
[   33.279320][  T305]  ? __x64_sys_umount+0x12d/0x170
[   33.284400][  T305]  ? __cfi___x64_sys_umount+0x10/0x10
[   33.289800][  T305]  ? fpregs_restore_userregs+0x128/0x260
[   33.295512][  T305]  syscall_exit_work+0x84/0x140
[   33.300389][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   33.306589][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   33.311998][  T305]  do_syscall_64+0x58/0xa0
[   33.316424][  T305]  ? clear_bhb_loop+0x30/0x80
[   33.321171][  T305]  ? clear_bhb_loop+0x30/0x80
[   33.325870][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   33.331802][  T305] RIP: 0033:0x7f1a01c66347
[   33.336254][  T305] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 88 77 0a 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 d0 ff ff ff f7 d8 64 89 02 b8
[   33.355893][  T305] RSP: 002b:00007ffca366ef78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[   33.364377][  T305] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1a01c66347
[   33.372410][  T305] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffca366f030
[   33.380403][  T305] RBP: 00007ffca366f030 R08: 00007ffca3670030 R09: 00000000ffffffff
[   33.388415][  T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffca36700e0
[   33.396420][  T305] R13: 00005555570f6720 R14: 431bde82d7b634db R15: 00007ffca3670084
[   33.404432][  T305]  </TASK>
[   33.407468][  T305] ---[ end trace 0000000000000000 ]---
[   33.413105][  T305] ==================================================================
[   33.421197][  T305] BUG: KASAN: null-ptr-deref in ihold+0x20/0x60
[   33.427440][  T305] Write of size 4 at addr 0000000000000170 by task syz-executor160/305
[   33.435672][  T305] 
[   33.438012][  T305] CPU: 0 PID: 305 Comm: syz-executor160 Tainted: G        W          syzkaller #0
[   33.447202][  T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   33.457259][  T305] Call Trace:
[   33.460534][  T305]  <TASK>
[   33.463476][  T305]  __dump_stack+0x21/0x24
[   33.467817][  T305]  dump_stack_lvl+0x110/0x170
[   33.472517][  T305]  ? __cfi_dump_stack_lvl+0x8/0x8
[   33.477544][  T305]  ? __cfi_call_rcu+0x10/0x10
[   33.482222][  T305]  ? ihold+0x20/0x60
[   33.486117][  T305]  ? ihold+0x20/0x60
[   33.490019][  T305]  print_report+0x3d/0x60
[   33.494352][  T305]  kasan_report+0x122/0x150
[   33.498861][  T305]  ? ihold+0x20/0x60
[   33.502766][  T305]  kasan_check_range+0x249/0x2a0
[   33.507707][  T305]  __kasan_check_write+0x14/0x20
[   33.512667][  T305]  ihold+0x20/0x60
[   33.516406][  T305]  vfs_rmdir+0x24c/0x4f0
[   33.520647][  T305]  incfs_kill_sb+0xfe/0x210
[   33.525155][  T305]  deactivate_locked_super+0xb5/0x120
[   33.530553][  T305]  deactivate_super+0xaf/0xe0
[   33.535251][  T305]  cleanup_mnt+0x45e/0x4e0
[   33.539805][  T305]  __cleanup_mnt+0x19/0x20
[   33.544232][  T305]  task_work_run+0x1e1/0x250
[   33.548835][  T305]  ? __cfi_task_work_run+0x10/0x10
[   33.553970][  T305]  ? path_umount+0x345/0xf60
[   33.558576][  T305]  ? __kasan_slab_free+0x11/0x20
[   33.563533][  T305]  ptrace_notify+0x23f/0x270
[   33.568141][  T305]  ? __cfi_path_umount+0x10/0x10
[   33.573098][  T305]  ? __cfi_ptrace_notify+0x10/0x10
[   33.578232][  T305]  ? user_path_at_empty+0x162/0x1c0
[   33.583443][  T305]  ? __x64_sys_umount+0x12d/0x170
[   33.588482][  T305]  ? __cfi___x64_sys_umount+0x10/0x10
[   33.593867][  T305]  ? fpregs_restore_userregs+0x128/0x260
[   33.599514][  T305]  syscall_exit_work+0x84/0x140
[   33.604380][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   33.610549][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   33.615975][  T305]  do_syscall_64+0x58/0xa0
[   33.620418][  T305]  ? clear_bhb_loop+0x30/0x80
[   33.625166][  T305]  ? clear_bhb_loop+0x30/0x80
[   33.629874][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   33.635793][  T305] RIP: 0033:0x7f1a01c66347
[   33.640251][  T305] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 88 77 0a 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 d0 ff ff ff f7 d8 64 89 02 b8
[   33.659892][  T305] RSP: 002b:00007ffca366ef78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[   33.668336][  T305] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1a01c66347
[   33.676328][  T305] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffca366f030
[   33.684404][  T305] RBP: 00007ffca366f030 R08: 00007ffca3670030 R09: 00000000ffffffff
[   33.692407][  T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffca36700e0
[   33.700403][  T305] R13: 00005555570f6720 R14: 431bde82d7b634db R15: 00007ffca3670084
[   33.708416][  T305]  </TASK>
[   33.711445][  T305] ==================================================================
[   33.720122][  T305] Disabling lock debugging due to kernel taint
[   33.726383][  T305] BUG: kernel NULL pointer dereference, address: 0000000000000170
[   33.734207][  T305] #PF: supervisor write access in kernel mode
[   33.740300][  T305] #PF: error_code(0x0002) - not-present page
[   33.746281][  T305] PGD 0 P4D 0 
[   33.749661][  T305] Oops: 0002 [#1] PREEMPT SMP KASAN
[   33.754866][  T305] CPU: 0 PID: 305 Comm: syz-executor160 Tainted: G    B   W          syzkaller #0
[   33.764070][  T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   33.774133][  T305] RIP: 0010:ihold+0x26/0x60
[   33.778659][  T305] Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 21 16 ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 f0 a3 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 11
[   33.798274][  T305] RSP: 0018:ffffc90000e57ba0 EFLAGS: 00010246
[   33.804359][  T305] RAX: ffff8881101bd100 RBX: 0000000000000000 RCX: ffff8881101bd100
[   33.812338][  T305] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   33.820315][  T305] RBP: ffffc90000e57bb0 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
[   33.828299][  T305] R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: ffff888110386294
[   33.836294][  T305] R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
[   33.844460][  T305] FS:  00005555570f53c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
[   33.853430][  T305] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.860030][  T305] CR2: 0000000000000170 CR3: 0000000110498000 CR4: 00000000003506b0
[   33.868012][  T305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.875994][  T305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.883982][  T305] Call Trace:
[   33.887275][  T305]  <TASK>
[   33.890219][  T305]  vfs_rmdir+0x24c/0x4f0
[   33.894491][  T305]  incfs_kill_sb+0xfe/0x210
[   33.899024][  T305]  deactivate_locked_super+0xb5/0x120
[   33.904412][  T305]  deactivate_super+0xaf/0xe0
[   33.909112][  T305]  cleanup_mnt+0x45e/0x4e0
[   33.913538][  T305]  __cleanup_mnt+0x19/0x20
[   33.917959][  T305]  task_work_run+0x1e1/0x250
[   33.922573][  T305]  ? __cfi_task_work_run+0x10/0x10
[   33.927696][  T305]  ? path_umount+0x345/0xf60
[   33.932318][  T305]  ? __kasan_slab_free+0x11/0x20
[   33.937274][  T305]  ptrace_notify+0x23f/0x270
[   33.941924][  T305]  ? __cfi_path_umount+0x10/0x10
[   33.946882][  T305]  ? __cfi_ptrace_notify+0x10/0x10
[   33.952014][  T305]  ? user_path_at_empty+0x162/0x1c0
[   33.957229][  T305]  ? __x64_sys_umount+0x12d/0x170
[   33.962275][  T305]  ? __cfi___x64_sys_umount+0x10/0x10
[   33.967663][  T305]  ? fpregs_restore_userregs+0x128/0x260
[   33.973313][  T305]  syscall_exit_work+0x84/0x140
[   33.978179][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   33.984353][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   33.989738][  T305]  do_syscall_64+0x58/0xa0
[   33.994172][  T305]  ? clear_bhb_loop+0x30/0x80
[   33.998902][  T305]  ? clear_bhb_loop+0x30/0x80
[   34.003595][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   34.009502][  T305] RIP: 0033:0x7f1a01c66347
[   34.013941][  T305] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 88 77 0a 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 d0 ff ff ff f7 d8 64 89 02 b8
[   34.033559][  T305] RSP: 002b:00007ffca366ef78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[   34.041999][  T305] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1a01c66347
[   34.049991][  T305] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffca366f030
[   34.057982][  T305] RBP: 00007ffca366f030 R08: 00007ffca3670030 R09: 00000000ffffffff
[   34.065971][  T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffca36700e0
[   34.073956][  T305] R13: 00005555570f6720 R14: 431bde82d7b634db R15: 00007ffca3670084
[   34.081953][  T305]  </TASK>
[   34.085012][  T305] Modules linked in:
[   34.088929][  T305] CR2: 0000000000000170
[   34.093103][  T305] ---[ end trace 0000000000000000 ]---
[   34.098567][  T305] RIP: 0010:ihold+0x26/0x60
[   34.103089][  T305] Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 21 16 ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 f0 a3 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 11
[   34.122721][  T305] RSP: 0018:ffffc90000e57ba0 EFLAGS: 00010246
[   34.128813][  T305] RAX: ffff8881101bd100 RBX: 0000000000000000 RCX: ffff8881101bd100
[   34.136798][  T305] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   34.144789][  T305] RBP: ffffc90000e57bb0 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
[   34.152781][  T305] R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: ffff888110386294
[   34.160796][  T305] R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
[   34.168809][  T305] FS:  00005555570f53c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
[   34.177759][  T305] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.184359][  T305] CR2: 0000000000000170 CR3: 0000000110498000 CR4: 00000000003506b0
[   34.192342][  T305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.200327][  T305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.208321][  T305] Kernel panic - not syncing: Fatal exception
[   34.214935][  T305] Kernel Offset: disabled
[   34.219282][  T305] Rebooting in 86400 seconds..