./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor303284839 <...> Warning: Permanently added '10.128.0.112' (ED25519) to the list of known hosts. execve("./syz-executor303284839", ["./syz-executor303284839"], 0x7ffdf41df340 /* 10 vars */) = 0 brk(NULL) = 0x55556161b000 brk(0x55556161bd40) = 0x55556161bd40 arch_prctl(ARCH_SET_FS, 0x55556161b3c0) = 0 set_tid_address(0x55556161b690) = 5867 set_robust_list(0x55556161b6a0, 24) = 0 rseq(0x55556161bce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor303284839", 4096) = 27 getrandom("\x5e\x0f\xa9\x95\xa2\x73\xef\x51", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556161bd40 brk(0x55556163cd40) = 0x55556163cd40 brk(0x55556163d000) = 0x55556163d000 mprotect(0x7fa39a735000, 16384, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5868 attached , child_tidptr=0x55556161b690) = 5868 [pid 5868] set_robust_list(0x55556161b6a0, 24) = 0 [pid 5868] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5868] setpgid(0, 0) = 0 [pid 5868] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5868] write(3, "1000", 4) = 4 [pid 5868] close(3) = 0 [pid 5868] write(1, "executing program\n", 18executing program ) = 18 [pid 5868] futex(0x7fa39a73b30c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5868] rt_sigaction(SIGRT_1, {sa_handler=0x7fa39a6d71e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fa39a6c8860}, NULL, 8) = 0 [pid 5868] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5868] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fa39a64a000 [pid 5868] mprotect(0x7fa39a64b000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5868] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5868] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fa39a66a990, parent_tid=0x7fa39a66a990, exit_signal=0, stack=0x7fa39a64a000, stack_size=0x20300, tls=0x7fa39a66a6c0}./strace-static-x86_64: Process 5869 attached => {parent_tid=[5869]}, 88) = 5869 [pid 5869] rseq(0x7fa39a66afe0, 0x20, 0, 0x53053053 [pid 5868] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5869] <... rseq resumed>) = 0 [pid 5868] futex(0x7fa39a73b308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5869] set_robust_list(0x7fa39a66a9a0, 24 [pid 5868] <... futex resumed>) = 0 [pid 5869] <... set_robust_list resumed>) = 0 [pid 5868] futex(0x7fa39a73b30c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5869] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5869] mremap(0x200000000000, 4096, 4096, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000481000 [pid 5868] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5868] exit_group(0) = ? [pid 5867] kill(-5868, SIGKILL) = 0 [pid 5867] kill(5868, SIGKILL) = 0 [pid 5867] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5867] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5867] getdents64(3, 0x55556161c730 /* 2 entries */, 32768) = 48 [pid 5867] getdents64(3, 0x55556161c730 /* 0 entries */, 32768) = 0 [pid 5867] close(3) = 0 [ 292.749913][ T31] INFO: task syz-executor303:5868 blocked for more than 143 seconds. [ 292.758171][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 292.766670][ T31] Blocked by coredump. [ 292.771554][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 292.780554][ T31] task:syz-executor303 state:D stack:26920 pid:5868 tgid:5868 ppid:5867 task_flags:0x40004c flags:0x00004002 [ 292.793026][ T31] Call Trace: [ 292.796332][ T31] [ 292.799647][ T31] __schedule+0x1737/0x4d30 [ 292.804228][ T31] ? __lock_acquire+0xab9/0xd20 [ 292.809448][ T31] ? schedule+0x165/0x360 [ 292.813808][ T31] ? __lock_acquire+0xab9/0xd20 [ 292.819123][ T31] ? __pfx___schedule+0x10/0x10 [ 292.824024][ T31] ? schedule+0x91/0x360 [ 292.828290][ T31] schedule+0x165/0x360 [ 292.833048][ T31] schedule_preempt_disabled+0x13/0x30 [ 292.838545][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 292.844534][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 292.850511][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 292.856617][ T31] ? exit_mm+0xcc/0x2c0 [ 292.861271][ T31] ? __pfx_mm_release+0x10/0x10 [ 292.866152][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 292.872238][ T31] down_read+0x98/0x2e0 [ 292.876429][ T31] exit_mm+0xcc/0x2c0 [ 292.880831][ T31] ? __pfx_exit_mm+0x10/0x10 [ 292.885456][ T31] ? rcu_is_watching+0x15/0xb0 [ 292.890608][ T31] do_exit+0x648/0x2300 [ 292.894851][ T31] ? __pfx_do_exit+0x10/0x10 [ 292.899925][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 292.905161][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 292.910749][ T31] do_group_exit+0x21c/0x2d0 [ 292.915378][ T31] __x64_sys_exit_group+0x3f/0x40 [ 292.920819][ T31] x64_sys_call+0x21f7/0x2200 [ 292.925521][ T31] do_syscall_64+0xfa/0x3b0 [ 292.930424][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 292.935666][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 292.942244][ T31] ? clear_bhb_loop+0x60/0xb0 [ 292.946979][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 292.953282][ T31] RIP: 0033:0x7fa39a6af309 [ 292.957735][ T31] RSP: 002b:00007ffea1c87798 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 292.966686][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa39a6af309 [ 292.974976][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 292.983761][ T31] RBP: 00007fa39a73b2b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 292.992006][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa39a73b2b0 [ 293.000315][ T31] R13: 0000000000000000 R14: 00007fa39a73be40 R15: 00007fa39a67d120 [ 293.008340][ T31] [ 293.011739][ T31] [ 293.011739][ T31] Showing all locks held in the system: [ 293.019803][ T31] 1 lock held by khungtaskd/31: [ 293.024670][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 293.035002][ T31] 2 locks held by getty/5609: [ 293.040002][ T31] #0: ffff8880332fe0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 293.050089][ T31] #1: ffffc9000362c2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 293.060509][ T31] 1 lock held by syz-executor303/5868: [ 293.065982][ T31] #0: ffff88807e3ded60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 293.075553][ T31] 1 lock held by syz-executor303/5869: [ 293.081289][ T31] [ 293.083625][ T31] ============================================= [ 293.083625][ T31] [ 293.092679][ T31] NMI backtrace for cpu 0 [ 293.092705][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 293.092729][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 293.092741][ T31] Call Trace: [ 293.092749][ T31] [ 293.092757][ T31] dump_stack_lvl+0x189/0x250 [ 293.092804][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 293.092834][ T31] ? __pfx__printk+0x10/0x10 [ 293.092876][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 293.092904][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 293.092931][ T31] ? __pfx__printk+0x10/0x10 [ 293.092964][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 293.092990][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 293.093018][ T31] watchdog+0xf93/0xfe0 [ 293.093045][ T31] ? watchdog+0x1de/0xfe0 [ 293.093072][ T31] kthread+0x70e/0x8a0 [ 293.093105][ T31] ? __pfx_watchdog+0x10/0x10 [ 293.093125][ T31] ? __pfx_kthread+0x10/0x10 [ 293.093156][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 293.093182][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 293.093208][ T31] ? __pfx_kthread+0x10/0x10 [ 293.093238][ T31] ret_from_fork+0x3f9/0x770 [ 293.093266][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 293.093297][ T31] ? __switch_to_asm+0x39/0x70 [ 293.093313][ T31] ? __switch_to_asm+0x33/0x70 [ 293.093330][ T31] ? __pfx_kthread+0x10/0x10 [ 293.093360][ T31] ret_from_fork_asm+0x1a/0x30 [ 293.093395][ T31] [ 293.093402][ T31] Sending NMI from CPU 0 to CPUs 1: [ 293.240700][ C1] NMI backtrace for cpu 1 [ 293.240716][ C1] CPU: 1 UID: 0 PID: 5201 Comm: syslogd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 293.240736][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 293.240746][ C1] RIP: 0010:validate_chain+0xfd7/0x2140 [ 293.240774][ C1] Code: 25 ff 0f 00 00 39 05 64 0e 51 12 73 06 89 05 5c 0e 51 12 49 8b 04 24 48 89 de 48 39 e8 0f 84 33 fe ff ff 4c 89 68 30 48 8b 00 <48> 39 e8 75 f4 48 89 de e9 1f fe ff ff 48 c7 c7 50 e6 40 8e 48 89 [ 293.240788][ C1] RSP: 0018:ffffc90003047258 EFLAGS: 00000002 [ 293.240802][ C1] RAX: ffffffff967b9f68 RBX: 0000000000000111 RCX: 0000000000000002 [ 293.240813][ C1] RDX: 0000000000000008 RSI: 0000000000000111 RDI: ffff88804f1d8000 [ 293.240824][ C1] RBP: ffffffff939046f0 R08: ffffc90003047220 R09: 0000000000000020 [ 293.240835][ C1] R10: dffffc0000000000 R11: ffffffff819e2480 R12: ffffffff9672a7d8 [ 293.240847][ C1] R13: ffffc900030472e0 R14: ffff88804f1d8b90 R15: 0000000000000001 [ 293.240858][ C1] FS: 00007f3f2ad1ec80(0000) GS:ffff8881258ab000(0000) knlGS:0000000000000000 [ 293.240872][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 293.240882][ C1] CR2: 000055b014f604b0 CR3: 000000004fb3c000 CR4: 00000000003526f0 [ 293.240897][ C1] Call Trace: [ 293.240904][ C1] [ 293.240922][ C1] __lock_acquire+0xab9/0xd20 [ 293.240945][ C1] ? hrtimer_try_to_cancel+0x22b/0x420 [ 293.240964][ C1] lock_acquire+0x120/0x360 [ 293.240981][ C1] ? hrtimer_try_to_cancel+0x22b/0x420 [ 293.241006][ C1] _raw_spin_lock_irqsave+0xa7/0xf0 [ 293.241028][ C1] ? hrtimer_try_to_cancel+0x22b/0x420 [ 293.241046][ C1] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 293.241071][ C1] hrtimer_try_to_cancel+0x22b/0x420 [ 293.241094][ C1] update_curr_dl_se+0x1ef/0x980 [ 293.241115][ C1] update_curr+0x3fb/0x730 [ 293.241135][ C1] enqueue_entity+0x5f/0x1120 [ 293.241158][ C1] enqueue_task_fair+0x25a/0x1470 [ 293.241183][ C1] ? sched_clock+0x3f/0x60 [ 293.241198][ C1] ? sched_clock_cpu+0x74/0x430 [ 293.241221][ C1] enqueue_task+0x72/0x420 [ 293.241243][ C1] ttwu_do_activate+0x1f3/0x870 [ 293.241288][ C1] try_to_wake_up+0x721/0x12b0 [ 293.241317][ C1] autoremove_wake_function+0x17/0x100 [ 293.241344][ C1] __wake_up_common_lock+0x137/0x1f0 [ 293.241363][ C1] __unix_dgram_recvmsg+0x486/0xd60 [ 293.241391][ C1] ? aa_file_perm+0x13e/0x11b0 [ 293.241408][ C1] ? __pfx___unix_dgram_recvmsg+0x10/0x10 [ 293.241433][ C1] ? xfd_validate_state+0x6d/0x150 [ 293.241456][ C1] ? bpf_lsm_socket_recvmsg+0x9/0x20 [ 293.241480][ C1] ? unix_dgram_recvmsg+0xb1/0xd0 [ 293.241496][ C1] ? __pfx_unix_dgram_recvmsg+0x10/0x10 [ 293.241513][ C1] sock_recvmsg+0x229/0x270 [ 293.241543][ C1] sock_read_iter+0x231/0x2f0 [ 293.241565][ C1] ? __pfx_sock_read_iter+0x10/0x10 [ 293.241591][ C1] ? bpf_lsm_file_permission+0x9/0x20 [ 293.241606][ C1] ? security_file_permission+0x75/0x290 [ 293.241642][ C1] vfs_read+0x4d0/0x980 [ 293.241666][ C1] ? __pfx_vfs_read+0x10/0x10 [ 293.241689][ C1] ? __rseq_handle_notify_resume+0x37e/0x11f0 [ 293.241713][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 293.241737][ C1] ksys_read+0x145/0x250 [ 293.241758][ C1] ? __pfx_ksys_read+0x10/0x10 [ 293.241778][ C1] ? rcu_is_watching+0x15/0xb0 [ 293.241800][ C1] ? do_syscall_64+0xbe/0x3b0 [ 293.241826][ C1] do_syscall_64+0xfa/0x3b0 [ 293.241850][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 293.241866][ C1] ? asm_sysvec_call_function_single+0x1a/0x20 [ 293.241882][ C1] ? clear_bhb_loop+0x60/0xb0 [ 293.241900][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 293.241916][ C1] RIP: 0033:0x7f3f2ae6e407 [ 293.241929][ C1] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 293.241942][ C1] RSP: 002b:00007ffe3f922cb0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 293.241957][ C1] RAX: ffffffffffffffda RBX: 00007f3f2ad1ec80 RCX: 00007f3f2ae6e407 [ 293.241969][ C1] RDX: 00000000000000ff RSI: 00005568a3d29950 RDI: 0000000000000000 [ 293.241979][ C1] RBP: 00005568a3d29910 R08: 0000000000000000 R09: 0000000000000000 [ 293.241989][ C1] R10: 0000000000000000 R11: 0000000000000202 R12: 00005568a3d29982 [ 293.241999][ C1] R13: 0000000000000000 R14: 00005568a3d29950 R15: 000055686ce6fd98 [ 293.242017][ C1] [ 293.242024][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.325 msecs [ 293.242711][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 293.682552][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 293.693869][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 293.703927][ T31] Call Trace: [ 293.707215][ T31] [ 293.710146][ T31] dump_stack_lvl+0x99/0x250 [ 293.714751][ T31] ? __asan_memcpy+0x40/0x70 [ 293.719353][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 293.724578][ T31] ? __pfx__printk+0x10/0x10 [ 293.729188][ T31] vpanic+0x281/0x750 [ 293.733183][ T31] ? __pfx_vpanic+0x10/0x10 [ 293.737703][ T31] ? preempt_schedule+0xae/0xc0 [ 293.742567][ T31] ? preempt_schedule_common+0x83/0xd0 [ 293.748043][ T31] panic+0xb9/0xc0 [ 293.751773][ T31] ? __pfx_panic+0x10/0x10 [ 293.756214][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 293.761595][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 293.767758][ T31] watchdog+0xfd2/0xfe0 [ 293.771930][ T31] ? watchdog+0x1de/0xfe0 [ 293.776269][ T31] kthread+0x70e/0x8a0 [ 293.780354][ T31] ? __pfx_watchdog+0x10/0x10 [ 293.785032][ T31] ? __pfx_kthread+0x10/0x10 [ 293.789636][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 293.794839][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 293.800150][ T31] ? __pfx_kthread+0x10/0x10 [ 293.804840][ T31] ret_from_fork+0x3f9/0x770 [ 293.809442][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 293.814567][ T31] ? __switch_to_asm+0x39/0x70 [ 293.819332][ T31] ? __switch_to_asm+0x33/0x70 [ 293.824093][ T31] ? __pfx_kthread+0x10/0x10 [ 293.828694][ T31] ret_from_fork_asm+0x1a/0x30 [ 293.833477][ T31] [ 293.836839][ T31] Kernel Offset: disabled [ 293.841174][ T31] Rebooting in 86400 seconds..