./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1086396607 <...> Warning: Permanently added '10.128.1.157' (ED25519) to the list of known hosts. execve("./syz-executor1086396607", ["./syz-executor1086396607"], 0x7ffe26648960 /* 10 vars */) = 0 brk(NULL) = 0x555595075000 brk(0x555595075d40) = 0x555595075d40 arch_prctl(ARCH_SET_FS, 0x5555950753c0) = 0 set_tid_address(0x555595075690) = 5835 set_robust_list(0x5555950756a0, 24) = 0 rseq(0x555595075ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1086396607", 4096) = 28 getrandom("\x6c\x6d\x41\xce\x04\x96\xc2\xf6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555595075d40 brk(0x555595096d40) = 0x555595096d40 brk(0x555595097000) = 0x555595097000 mprotect(0x7f1cf2db4000, 16384, PROT_READ) = 0 mmap(0x3ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ffffffff000 mmap(0x400000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400000000000 mmap(0x400001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5836 attached , child_tidptr=0x555595075690) = 5836 [pid 5836] set_robust_list(0x5555950756a0, 24 [pid 5835] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC [pid 5836] <... set_robust_list resumed>) = 0 [pid 5835] <... openat resumed>) = 3 [pid 5835] write(3, "10000000000", 11) = 11 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "20", 2) = 2 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "0", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "0", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "100", 3) = 3 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "0", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "0", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "7 4 1 3", 7) = 7 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1", 1) = 1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "0", 1) = 1 [ 115.499463][ T30] audit: type=1400 audit(1742459794.536:88): avc: denied { execmem } for pid=5835 comm="syz-executor108" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "5836", 4) = 4 [pid 5835] close(3) = 0 [pid 5835] kill(5836, SIGKILL) = 0 [pid 5836] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5836, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5837 attached , child_tidptr=0x555595075690) = 5837 [pid 5837] set_robust_list(0x5555950756a0, 24) = 0 [pid 5837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5837] getppid() = 0 [pid 5837] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5837] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5837] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5837] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5837] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5837] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5837] unshare(CLONE_NEWNS) = 0 [pid 5837] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5837] unshare(CLONE_NEWIPC) = 0 [pid 5837] unshare(CLONE_NEWCGROUP) = 0 [pid 5837] unshare(CLONE_NEWUTS) = 0 [pid 5837] unshare(CLONE_SYSVSEM) = 0 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "16777216", 8) = 8 [pid 5837] close(3) = 0 [ 115.700573][ T30] audit: type=1400 audit(1742459794.736:89): avc: denied { mounton } for pid=5837 comm="syz-executor108" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "536870912", 9) = 9 [pid 5837] close(3) = 0 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "1024", 4) = 4 [pid 5837] close(3) = 0 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "8192", 4) = 4 [pid 5837] close(3) = 0 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "1024", 4) = 4 [pid 5837] close(3) = 0 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "1024", 4) = 4 [pid 5837] close(3) = 0 [pid 5837] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5837] close(3) = 0 [pid 5837] getpid() = 1 [pid 5837] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5842] rseq(0x7f1cf2ceafe0, 0x20, 0, 0x53053053) = 0 [pid 5841] <... clone3 resumed> => {parent_tid=[3]}, 88) = 3 [pid 5842] set_robust_list(0x7f1cf2cea9a0, 24 [pid 5841] rt_sigprocmask(SIG_SETMASK, [], [pid 5842] <... set_robust_list resumed>) = 0 [pid 5841] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5842] rt_sigprocmask(SIG_SETMASK, [], [pid 5841] futex(0x7f1cf2dba328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5842] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5841] <... futex resumed>) = 0 [pid 5842] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY [pid 5841] futex(0x7f1cf2dba32c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5842] <... openat resumed>) = 3 [pid 5842] futex(0x7f1cf2dba32c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5842] futex(0x7f1cf2dba328, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] <... futex resumed>) = 0 [pid 5842] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] futex(0x7f1cf2dba328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5842] socketpair(AF_UNIX, SOCK_STREAM, 0, [pid 5841] <... futex resumed>) = 0 [pid 5842] <... socketpair resumed>[4, 5]) = 0 [pid 5841] futex(0x7f1cf2dba32c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5842] futex(0x7f1cf2dba32c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5842] ioctl(3, NBD_SET_SOCK, 4 [pid 5841] futex(0x7f1cf2dba328, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5841] futex(0x7f1cf2dba32c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5842] <... ioctl resumed>) = 0 [pid 5842] futex(0x7f1cf2dba32c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5842] futex(0x7f1cf2dba328, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] futex(0x7f1cf2dba328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5842] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5842] ioctl(3, NBD_DO_IT [pid 5841] <... futex resumed>) = 0 [pid 5841] futex(0x7f1cf2dba32c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5841] futex(0x7f1cf2dba33c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5841] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1cf2ca9000 [pid 5841] mprotect(0x7f1cf2caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5841] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5841] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f1cf2cc9990, parent_tid=0x7f1cf2cc9990, exit_signal=0, stack=0x7f1cf2ca9000, stack_size=0x20300, tls=0x7f1cf2cc96c0}./strace-static-x86_64: Process 5843 attached [pid 5843] rseq(0x7f1cf2cc9fe0, 0x20, 0, 0x53053053 [pid 5841] <... clone3 resumed> => {parent_tid=[4]}, 88) = 4 [pid 5843] <... rseq resumed>) = 0 [pid 5841] rt_sigprocmask(SIG_SETMASK, [], [pid 5843] set_robust_list(0x7f1cf2cc99a0, 24 [pid 5841] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5843] <... set_robust_list resumed>) = 0 [pid 5843] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5843] futex(0x7f1cf2dba338, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] futex(0x7f1cf2dba338, FUTEX_WAKE_PRIVATE, 1000000 [pid 5843] ioctl(3, NBD_SET_SIZE, 62740 [pid 5841] <... futex resumed>) = 0 [pid 5841] futex(0x7f1cf2dba33c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5843] <... ioctl resumed>) = 0 [pid 5843] futex(0x7f1cf2dba33c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5841] <... futex resumed>) = 0 [pid 5843] <... futex resumed>) = 1 [ 116.650923][ T5843] nbd0: detected capacity change from 0 to 122 [pid 5843] futex(0x7f1cf2dba338, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] close(3) = 0 [pid 5841] close(4) = 0 [pid 5841] close(5) = 0 [pid 5841] close(6) = -1 EBADF (Bad file descriptor) [pid 5841] close(7) = -1 EBADF (Bad file descriptor) [pid 5841] close(8) = -1 EBADF (Bad file descriptor) [pid 5841] close(9) = -1 EBADF (Bad file descriptor) [pid 5841] close(10) = -1 EBADF (Bad file descriptor) [pid 5841] close(11) = -1 EBADF (Bad file descriptor) [pid 5841] close(12) = -1 EBADF (Bad file descriptor) [pid 5841] close(13) = -1 EBADF (Bad file descriptor) [pid 5841] close(14) = -1 EBADF (Bad file descriptor) [pid 5841] close(15) = -1 EBADF (Bad file descriptor) [pid 5841] close(16) = -1 EBADF (Bad file descriptor) [ 116.802305][ T55] block nbd0: Receive control failed (result -104) [pid 5841] close(17) = -1 EBADF (Bad file descriptor) [pid 5841] close(18) = -1 EBADF (Bad file descriptor) [pid 5841] close(19) = -1 EBADF (Bad file descriptor) [pid 5841] close(20) = -1 EBADF (Bad file descriptor) [pid 5841] close(21) = -1 EBADF (Bad file descriptor) [pid 5841] close(22) = -1 EBADF (Bad file descriptor) [pid 5841] close(23) = -1 EBADF (Bad file descriptor) [pid 5841] close(24) = -1 EBADF (Bad file descriptor) [pid 5841] close(25) = -1 EBADF (Bad file descriptor) [pid 5841] close(26) = -1 EBADF (Bad file descriptor) [pid 5841] close(27) = -1 EBADF (Bad file descriptor) [pid 5841] close(28) = -1 EBADF (Bad file descriptor) [pid 5841] close(29) = -1 EBADF (Bad file descriptor) [pid 5841] exit_group(0 [pid 5843] <... futex resumed>) = ? [pid 5841] <... exit_group resumed>) = ? [pid 5843] +++ exited with 0 +++ [pid 5837] kill(-2, SIGKILL) = 0 [pid 5837] kill(2, SIGKILL) = 0 [pid 5837] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5837] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5837] getdents64(3, 0x555595076730 /* 2 entries */, 32768) = 48 [pid 5837] getdents64(3, 0x555595076730 /* 0 entries */, 32768) = 0 [pid 5837] close(3) = 0 [ 147.181682][ T59] block nbd0: Possible stuck request ffff888026477000: control (read@0,4096B). Runtime 30 seconds [ 176.725229][ T5194] udevd[5194]: worker [5838] /devices/virtual/block/nbd0 is taking a long time [ 177.261457][ T59] block nbd0: Possible stuck request ffff888026477000: control (read@0,4096B). Runtime 60 seconds [ 207.341019][ T59] block nbd0: Possible stuck request ffff888026477000: control (read@0,4096B). Runtime 90 seconds [ 237.421124][ T43] block nbd0: Possible stuck request ffff888026477000: control (read@0,4096B). Runtime 120 seconds [ 267.501118][ T43] block nbd0: Possible stuck request ffff888026477000: control (read@0,4096B). Runtime 150 seconds [ 279.020966][ T31] INFO: task syz-executor108:5842 blocked for more than 143 seconds. [ 279.029105][ T31] Not tainted 6.14.0-rc7-syzkaller-00074-ga7f2e10ecd8f #0 [ 279.036780][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 279.045477][ T31] task:syz-executor108 state:D stack:26624 pid:5842 tgid:5841 ppid:5837 task_flags:0x400140 flags:0x00004006 [ 279.057467][ T31] Call Trace: [ 279.060747][ T31] [ 279.063698][ T31] __schedule+0xf43/0x5890 [ 279.068110][ T31] ? __pfx___lock_acquire+0x10/0x10 [ 279.073357][ T31] ? __pfx___lock_acquire+0x10/0x10 [ 279.078556][ T31] ? __pfx___schedule+0x10/0x10 [ 279.083436][ T31] ? schedule+0x298/0x350 [ 279.087771][ T31] ? __pfx_lock_release+0x10/0x10 [ 279.092856][ T31] ? __mutex_trylock_common+0x78/0x250 [ 279.098337][ T31] ? lock_acquire+0x2f/0xb0 [ 279.102859][ T31] ? schedule+0x1fd/0x350 [ 279.107187][ T31] schedule+0xe7/0x350 [ 279.111296][ T31] schedule_preempt_disabled+0x13/0x30 [ 279.116752][ T31] __mutex_lock+0x6bd/0xb10 [ 279.121273][ T31] ? lock_acquire.part.0+0x11b/0x380 [ 279.126559][ T31] ? bdev_release+0x15a/0x6d0 [ 279.131285][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 279.136308][ T31] ? __pfx_lock_release+0x10/0x10 [ 279.141373][ T31] ? locks_remove_file+0x34c/0x5a0 [ 279.146485][ T31] ? do_raw_spin_unlock+0x172/0x230 [ 279.151731][ T31] ? bdev_release+0x15a/0x6d0 [ 279.156403][ T31] bdev_release+0x15a/0x6d0 [ 279.160925][ T31] ? task_work_run+0x126/0x250 [ 279.165704][ T31] ? __pfx_blkdev_release+0x10/0x10 [ 279.170987][ T31] blkdev_release+0x15/0x20 [ 279.175503][ T31] __fput+0x3ff/0xb70 [ 279.179492][ T31] task_work_run+0x14e/0x250 [ 279.184150][ T31] ? __pfx_task_work_run+0x10/0x10 [ 279.189256][ T31] ? __pfx_task_work_add+0x10/0x10 [ 279.194432][ T31] ? __pfx_blkdev_ioctl+0x10/0x10 [ 279.199449][ T31] ? selinux_file_ioctl+0x180/0x270 [ 279.204691][ T31] ptrace_notify+0x10e/0x130 [ 279.209283][ T31] syscall_exit_to_user_mode_prepare+0x126/0x290 [ 279.215657][ T31] syscall_exit_to_user_mode+0x11/0x2a0 [ 279.221221][ T31] do_syscall_64+0xda/0x250 [ 279.225704][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 279.231634][ T31] RIP: 0033:0x7f1cf2d32b29 [ 279.236049][ T31] RSP: 002b:00007f1cf2cea218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 279.244477][ T31] RAX: 0000000000000000 RBX: 00007f1cf2dba328 RCX: 00007f1cf2d32b29 [ 279.252474][ T31] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 [ 279.260436][ T31] RBP: 00007f1cf2dba320 R08: 0000000000000000 R09: 0000000000000000 [ 279.268462][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1cf2dba32c [ 279.276451][ T31] R13: 00007f1cf2d87544 R14: 64626e2f7665642f R15: 0000400000000000 [ 279.284457][ T31] [ 279.287475][ T31] [ 279.287475][ T31] Showing all locks held in the system: [ 279.295224][ T31] 6 locks held by kworker/u8:1/13: [ 279.300330][ T31] 1 lock held by khungtaskd/31: [ 279.305207][ T31] #0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 [ 279.315131][ T31] 2 locks held by getty/5582: [ 279.319789][ T31] #0: ffff888032a1d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 [ 279.329571][ T31] #1: ffffc90002fe62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 [ 279.339701][ T31] 1 lock held by udevd/5838: [ 279.344367][ T31] #0: ffff888143b3b4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe20 [ 279.353702][ T31] 1 lock held by syz-executor108/5842: [ 279.359128][ T31] #0: ffff888143b3b4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x15a/0x6d0 [ 279.368721][ T31] [ 279.371047][ T31] ============================================= [ 279.371047][ T31] [ 279.379437][ T31] NMI backtrace for cpu 0 [ 279.379443][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc7-syzkaller-00074-ga7f2e10ecd8f #0 [ 279.379455][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 279.379460][ T31] Call Trace: [ 279.379464][ T31] [ 279.379467][ T31] dump_stack_lvl+0x116/0x1f0 [ 279.379484][ T31] nmi_cpu_backtrace+0x27b/0x390 [ 279.379496][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 279.379510][ T31] nmi_trigger_cpumask_backtrace+0x29c/0x300 [ 279.379527][ T31] watchdog+0xf62/0x12b0 [ 279.379545][ T31] ? __pfx_watchdog+0x10/0x10 [ 279.379560][ T31] ? lockdep_hardirqs_on+0x7c/0x110 [ 279.379575][ T31] ? __kthread_parkme+0x148/0x220 [ 279.379586][ T31] ? __pfx_watchdog+0x10/0x10 [ 279.379601][ T31] kthread+0x3af/0x750 [ 279.379614][ T31] ? __pfx_kthread+0x10/0x10 [ 279.379628][ T31] ? __pfx_kthread+0x10/0x10 [ 279.379641][ T31] ret_from_fork+0x45/0x80 [ 279.379655][ T31] ? __pfx_kthread+0x10/0x10 [ 279.379667][ T31] ret_from_fork_asm+0x1a/0x30 [ 279.379684][ T31] [ 279.379687][ T31] Sending NMI from CPU 0 to CPUs 1: [ 279.491035][ C1] NMI backtrace for cpu 1 [ 279.491045][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.14.0-rc7-syzkaller-00074-ga7f2e10ecd8f #0 [ 279.491060][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 279.491067][ C1] RIP: 0010:check_preemption_disabled+0x16/0xe0 [ 279.491092][ C1] Code: ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 4d 4d ac 74 65 8b 05 42 4d ac 74 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d 41 5c c3 cc cc cc cc [ 279.491103][ C1] RSP: 0018:ffffc900001b7aa8 EFLAGS: 00000092 [ 279.491115][ C1] RAX: 0000000080000004 RBX: 0000000000000001 RCX: ffffffff8195d3dc [ 279.491124][ C1] RDX: fffffbfff20c4d43 RSI: ffffffff8bd36920 RDI: ffffffff8bd36960 [ 279.491132][ C1] RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20c4d42 [ 279.491140][ C1] R10: ffffffff90626a17 R11: 0000000000000000 R12: 0000000000000000 [ 279.491148][ C1] R13: 000000000003d94c R14: 0000000000000001 R15: 0000000000000000 [ 279.491156][ C1] FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 279.491169][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 279.491177][ C1] CR2: 000055fa71824680 CR3: 000000000df80000 CR4: 00000000003526f0 [ 279.491185][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 279.491193][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 279.491200][ C1] Call Trace: [ 279.491205][ C1] [ 279.491210][ C1] ? nmi_cpu_backtrace+0x1d8/0x390 [ 279.491224][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 279.491241][ C1] ? nmi_handle+0x1ac/0x5d0 [ 279.491259][ C1] ? check_preemption_disabled+0x16/0xe0 [ 279.491289][ C1] ? default_do_nmi+0x6a/0x160 [ 279.491302][ C1] ? exc_nmi+0x170/0x1e0 [ 279.491314][ C1] ? end_repeat_nmi+0xf/0x53 [ 279.491334][ C1] ? trace_lock_acquire+0x3c/0x1f0 [ 279.491349][ C1] ? check_preemption_disabled+0x16/0xe0 [ 279.491366][ C1] ? check_preemption_disabled+0x16/0xe0 [ 279.491384][ C1] ? check_preemption_disabled+0x16/0xe0 [ 279.491401][ C1] [ 279.491405][ C1] [ 279.491410][ C1] rcu_is_watching+0x12/0xc0 [ 279.491424][ C1] trace_lock_acquire+0x14e/0x1f0 [ 279.491438][ C1] ? do_raw_spin_lock+0x12d/0x2c0 [ 279.491449][ C1] ? __get_next_timer_interrupt+0x18a/0x810 [ 279.491467][ C1] lock_acquire+0x2f/0xb0 [ 279.491483][ C1] ? __get_next_timer_interrupt+0x18a/0x810 [ 279.491501][ C1] _raw_spin_lock_nested+0x31/0x40 [ 279.491515][ C1] ? __get_next_timer_interrupt+0x18a/0x810 [ 279.491569][ C1] __get_next_timer_interrupt+0x18a/0x810 [ 279.491587][ C1] ? tick_nohz_next_event+0x7c/0x410 [ 279.491602][ C1] ? __pfx___get_next_timer_interrupt+0x10/0x10 [ 279.491620][ C1] ? get_jiffies_update+0xaa/0x2a0 [ 279.491633][ C1] ? get_jiffies_update+0x13a/0x2a0 [ 279.491648][ C1] tick_nohz_next_event+0x30b/0x410 [ 279.491662][ C1] ? __pfx_tick_nohz_next_event+0x10/0x10 [ 279.491676][ C1] ? asm_sysvec_call_function_single+0x1a/0x20 [ 279.491694][ C1] ? lockdep_hardirqs_on+0x7c/0x110 [ 279.491711][ C1] tick_nohz_get_sleep_length+0x184/0x240 [ 279.491727][ C1] menu_select+0x4a6/0x18e0 [ 279.491748][ C1] ? __pfx_menu_select+0x10/0x10 [ 279.491766][ C1] ? __pfx_tsc_verify_tsc_adjust+0x10/0x10 [ 279.491785][ C1] do_idle+0x2e7/0x3f0 [ 279.491802][ C1] ? __pfx_do_idle+0x10/0x10 [ 279.491820][ C1] cpu_startup_entry+0x4f/0x60 [ 279.491836][ C1] start_secondary+0x222/0x2b0 [ 279.491850][ C1] ? __pfx_start_secondary+0x10/0x10 [ 279.491867][ C1] common_startup_64+0x13e/0x148 [ 279.491890][ C1] [ 279.506089][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 279.506101][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc7-syzkaller-00074-ga7f2e10ecd8f #0 [ 279.506117][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 279.506126][ T31] Call Trace: [ 279.506131][ T31] [ 279.506137][ T31] dump_stack_lvl+0x3d/0x1f0 [ 279.506160][ T31] panic+0x71d/0x800 [ 279.506178][ T31] ? __pfx_panic+0x10/0x10 [ 279.506194][ T31] ? preempt_schedule_thunk+0x1a/0x30 [ 279.506216][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 279.506236][ T31] ? preempt_schedule_thunk+0x1a/0x30 [ 279.506256][ T31] ? watchdog+0xdcc/0x12b0 [ 279.506277][ T31] ? watchdog+0xdbf/0x12b0 [ 279.506300][ T31] watchdog+0xddd/0x12b0 [ 279.506325][ T31] ? __pfx_watchdog+0x10/0x10 [ 279.506345][ T31] ? lockdep_hardirqs_on+0x7c/0x110 [ 279.506365][ T31] ? __kthread_parkme+0x148/0x220 [ 279.506381][ T31] ? __pfx_watchdog+0x10/0x10 [ 279.506403][ T31] kthread+0x3af/0x750 [ 279.506422][ T31] ? __pfx_kthread+0x10/0x10 [ 279.506442][ T31] ? __pfx_kthread+0x10/0x10 [ 279.506461][ T31] ret_from_fork+0x45/0x80 [ 279.506480][ T31] ? __pfx_kthread+0x10/0x10 [ 279.506502][ T31] ret_from_fork_asm+0x1a/0x30 [ 279.506526][ T31] [ 279.963103][ T31] Kernel Offset: disabled [ 279.967415][ T31] Rebooting in 86400 seconds..