./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor166215719 <...> Warning: Permanently added '10.128.1.95' (ED25519) to the list of known hosts. execve("./syz-executor166215719", ["./syz-executor166215719"], 0x7ffc0bfe1710 /* 10 vars */) = 0 brk(NULL) = 0x55556a956000 brk(0x55556a956d00) = 0x55556a956d00 arch_prctl(ARCH_SET_FS, 0x55556a956380) = 0 set_tid_address(0x55556a956650) = 5864 set_robust_list(0x55556a956660, 24) = 0 rseq(0x55556a956ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor166215719", 4096) = 27 getrandom("\x5c\x9a\x3e\x96\xe8\x02\x1b\x1c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556a956d00 brk(0x55556a977d00) = 0x55556a977d00 brk(0x55556a978000) = 0x55556a978000 mprotect(0x7f52d49a0000, 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 5865 attached , child_tidptr=0x55556a956650) = 5865 [pid 5865] set_robust_list(0x55556a956660, 24) = 0 [pid 5865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5865] setpgid(0, 0) = 0 [pid 5865] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1000", 4) = 4 [pid 5865] close(3) = 0 [pid 5865] write(1, "executing program\n", 18executing program ) = 18 [pid 5865] creat("./file0", 000) = 3 [pid 5865] pipe2([4, 5], 0) = 0 [pid 5865] write(5, "\x15\x00\x00\x00\x65\xff\xff\x04\x80\x00\x00\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5865] dup(5) = 6 [pid 5865] write(6, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5865] write(6, "\x4c\x01\x00\x00\x05\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\x18\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"..., 311) = 311 [pid 5865] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = 0 [pid 5865] chmod("./file0", 000) = 0 [pid 5865] open("./file0", O_WRONLY) = 7 [pid 5865] write(7, "\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\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"..., 32748 [pid 5864] kill(-5865, SIGKILL) = 0 [pid 5864] kill(5865, SIGKILL) = 0 [pid 5864] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5864] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5864] getdents64(3, 0x55556a9576f0 /* 2 entries */, 32768) = 48 [pid 5864] getdents64(3, 0x55556a9576f0 /* 0 entries */, 32768) = 0 [pid 5864] close(3) = 0 [ 429.795713][ T31] INFO: task syz-executor166:5865 blocked for more than 143 seconds. [ 429.803954][ T31] Not tainted 6.16.0-syzkaller #0 [ 429.809699][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.818548][ T31] task:syz-executor166 state:D stack:24824 pid:5865 tgid:5865 ppid:5864 task_flags:0x400140 flags:0x00004006 [ 429.830614][ T31] Call Trace: [ 429.833913][ T31] [ 429.836900][ T31] __schedule+0x16aa/0x4c90 [ 429.841454][ T31] ? schedule+0x165/0x360 [ 429.845831][ T31] ? __pfx___schedule+0x10/0x10 [ 429.850800][ T31] ? schedule+0x91/0x360 [ 429.855042][ T31] schedule+0x165/0x360 [ 429.859283][ T31] io_schedule+0x81/0xe0 [ 429.863548][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 429.869005][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 429.874846][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 429.880585][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 429.886573][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.891426][ T31] ? rcu_is_watching+0x15/0xb0 [ 429.896223][ T31] folio_wait_writeback+0xb0/0x100 [ 429.901436][ T31] __filemap_fdatawait_range+0x147/0x230 [ 429.907130][ T31] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 429.913320][ T31] ? wbc_detach_inode+0x137/0x750 [ 429.918489][ T31] file_write_and_wait_range+0x275/0x330 [ 429.924142][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 429.930830][ T31] v9fs_file_fsync+0xcf/0x1a0 [ 429.935726][ T31] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 429.941047][ T31] ? __up_read+0x280/0x680 [ 429.945556][ T31] ? __pfx___up_read+0x10/0x10 [ 429.950338][ T31] ? netfs_file_write_iter+0x189/0x4a0 [ 429.955963][ T31] netfs_file_write_iter+0x3d8/0x4a0 [ 429.961270][ T31] vfs_write+0x54b/0xa90 [ 429.965624][ T31] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 429.971361][ T31] ? __pfx_vfs_write+0x10/0x10 [ 429.976200][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 429.981417][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 429.986676][ T31] ksys_write+0x145/0x250 [ 429.991021][ T31] ? __pfx_ksys_write+0x10/0x10 [ 429.995937][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.000722][ T31] do_syscall_64+0xfa/0x3b0 [ 430.005216][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.010539][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.016717][ T31] ? clear_bhb_loop+0x60/0xb0 [ 430.021405][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.027359][ T31] RIP: 0033:0x7f52d492cef9 [ 430.031831][ T31] RSP: 002b:00007ffccff60e38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 430.040319][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f52d492cef9 [ 430.048362][ T31] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 430.056412][ T31] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 430.064406][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 430.072454][ T31] R13: 00007f52d497604e R14: 0000000000000001 R15: 0000000000000001 [ 430.080537][ T31] [ 430.083567][ T31] [ 430.083567][ T31] Showing all locks held in the system: [ 430.091324][ T31] 1 lock held by khungtaskd/31: [ 430.096210][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.106135][ T31] 2 locks held by kworker/u8:7/3459: [ 430.111428][ T31] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 430.123152][ T31] #1: ffffc9000cad7bc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 430.135005][ T31] 2 locks held by getty/5599: [ 430.139727][ T31] #0: ffff88814d6680a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.149668][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.159822][ T31] 1 lock held by syz-executor166/5865: [ 430.165328][ T31] #0: ffff88802a7f8428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 430.174201][ T31] [ 430.176606][ T31] ============================================= [ 430.176606][ T31] [ 430.185069][ T31] NMI backtrace for cpu 1 [ 430.185092][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.185110][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.185119][ T31] Call Trace: [ 430.185129][ T31] [ 430.185137][ T31] dump_stack_lvl+0x189/0x250 [ 430.185158][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.185183][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.185201][ T31] ? __pfx__printk+0x10/0x10 [ 430.185231][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.185258][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.185284][ T31] ? _printk+0xcf/0x120 [ 430.185311][ T31] ? __pfx__printk+0x10/0x10 [ 430.185330][ T31] ? debug_show_all_locks+0x2e/0x180 [ 430.185356][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.185383][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.185410][ T31] watchdog+0xfee/0x1030 [ 430.185529][ T31] ? watchdog+0x1de/0x1030 [ 430.185563][ T31] kthread+0x70e/0x8a0 [ 430.185587][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.185609][ T31] ? __pfx_kthread+0x10/0x10 [ 430.185631][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.185646][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.185661][ T31] ? __pfx_kthread+0x10/0x10 [ 430.185683][ T31] ret_from_fork+0x3fc/0x770 [ 430.185701][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.185722][ T31] ? __switch_to_asm+0x39/0x70 [ 430.185740][ T31] ? __switch_to_asm+0x33/0x70 [ 430.185758][ T31] ? __pfx_kthread+0x10/0x10 [ 430.185780][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.185813][ T31] [ 430.340318][ T31] Sending NMI from CPU 1 to CPUs 0: [ 430.345607][ C0] NMI backtrace for cpu 0 [ 430.345622][ C0] CPU: 0 UID: 0 PID: 3536 Comm: kworker/u8:10 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.345641][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.345652][ C0] Workqueue: events_unbound toggle_allocation_gate [ 430.345755][ C0] RIP: 0010:flush_tlb_mm_range+0xc8/0x12c0 [ 430.345778][ C0] Code: f2 09 65 44 8b 2d fc f6 27 11 48 8d bb 90 06 00 00 be 08 00 00 00 e8 57 76 ab 00 41 b9 01 00 00 00 f0 4c 0f c1 8b 90 06 00 00 <49> ff c1 48 89 df 4c 89 7c 24 60 4c 89 fe 4c 89 64 24 68 4c 89 e2 [ 430.345792][ C0] RSP: 0018:ffffc9000cf375c0 EFLAGS: 00000002 [ 430.345806][ C0] RAX: 0000000000000001 RBX: ffff88801a470000 RCX: ffffffff81749949 [ 430.345817][ C0] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801a470690 [ 430.345828][ C0] RBP: ffffc9000cf376d0 R08: ffff88801a470697 R09: 000000000000c6bb [ 430.345839][ C0] R10: dffffc0000000000 R11: ffffed100348e0d3 R12: 00002aaaaaaac000 [ 430.345851][ C0] R13: 0000000000000000 R14: 000000000000000c R15: 00002aaaaaaab000 [ 430.345862][ C0] FS: 0000000000000000(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000 [ 430.345875][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.345886][ C0] CR2: 0000563e1499e168 CR3: 000000000df38000 CR4: 00000000003526f0 [ 430.345900][ C0] Call Trace: [ 430.345909][ C0] [ 430.345922][ C0] ? __pfx_flush_tlb_mm_range+0x10/0x10 [ 430.345944][ C0] ? kasan_check_range+0x2b0/0x2c0 [ 430.345987][ C0] ? __text_poke+0x633/0xa10 [ 430.346008][ C0] ? kmem_cache_alloc_node_noprof+0x8d/0x3c0 [ 430.346054][ C0] __text_poke+0x6e9/0xa10 [ 430.346083][ C0] ? __pfx_text_poke_memcpy+0x10/0x10 [ 430.346103][ C0] ? kmem_cache_alloc_node_noprof+0x8d/0x3c0 [ 430.346118][ C0] ? __pfx___text_poke+0x10/0x10 [ 430.346136][ C0] ? rcu_is_watching+0x15/0xb0 [ 430.346154][ C0] ? trace_contention_end+0x39/0x120 [ 430.346179][ C0] smp_text_poke_batch_finish+0xd0a/0x1100 [ 430.346203][ C0] ? __pfx_smp_text_poke_batch_finish+0x10/0x10 [ 430.346226][ C0] ? arch_jump_label_transform_queue+0x97/0x110 [ 430.346254][ C0] arch_jump_label_transform_apply+0x1c/0x30 [ 430.346277][ C0] static_key_disable_cpuslocked+0xc5/0x1b0 [ 430.346324][ C0] static_key_disable+0x1a/0x20 [ 430.346344][ C0] toggle_allocation_gate+0x1a1/0x240 [ 430.346361][ C0] ? __pfx_toggle_allocation_gate+0x10/0x10 [ 430.346377][ C0] ? process_scheduled_works+0x9ef/0x17b0 [ 430.346397][ C0] ? process_scheduled_works+0x9ef/0x17b0 [ 430.346413][ C0] ? process_scheduled_works+0x9ef/0x17b0 [ 430.346430][ C0] process_scheduled_works+0xade/0x17b0 [ 430.346460][ C0] ? __pfx_process_scheduled_works+0x10/0x10 [ 430.346484][ C0] worker_thread+0x8a0/0xda0 [ 430.346502][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.346531][ C0] ? __kthread_parkme+0x7b/0x200 [ 430.346553][ C0] kthread+0x70e/0x8a0 [ 430.346574][ C0] ? __pfx_worker_thread+0x10/0x10 [ 430.346591][ C0] ? __pfx_kthread+0x10/0x10 [ 430.346611][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.346625][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.346640][ C0] ? __pfx_kthread+0x10/0x10 [ 430.346660][ C0] ret_from_fork+0x3fc/0x770 [ 430.346677][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 430.346694][ C0] ? __switch_to_asm+0x39/0x70 [ 430.346713][ C0] ? __switch_to_asm+0x33/0x70 [ 430.346731][ C0] ? __pfx_kthread+0x10/0x10 [ 430.346751][ C0] ret_from_fork_asm+0x1a/0x30 [ 430.346777][ C0] [ 430.346785][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.179 msecs [ 430.347617][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.698082][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.708429][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.718494][ T31] Call Trace: [ 430.721798][ T31] [ 430.724730][ T31] dump_stack_lvl+0x99/0x250 [ 430.729357][ T31] ? __asan_memcpy+0x40/0x70 [ 430.733970][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.739186][ T31] ? __pfx__printk+0x10/0x10 [ 430.743879][ T31] panic+0x2db/0x790 [ 430.747780][ T31] ? __pfx_panic+0x10/0x10 [ 430.752218][ T31] ? __pfx_delay_tsc+0x10/0x10 [ 430.757013][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.762841][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.768230][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 430.774404][ T31] watchdog+0x102d/0x1030 [ 430.778747][ T31] ? watchdog+0x1de/0x1030 [ 430.783176][ T31] kthread+0x70e/0x8a0 [ 430.787251][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.791938][ T31] ? __pfx_kthread+0x10/0x10 [ 430.796539][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.801735][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.806931][ T31] ? __pfx_kthread+0x10/0x10 [ 430.811527][ T31] ret_from_fork+0x3fc/0x770 [ 430.816121][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.821238][ T31] ? __switch_to_asm+0x39/0x70 [ 430.826062][ T31] ? __switch_to_asm+0x33/0x70 [ 430.830827][ T31] ? __pfx_kthread+0x10/0x10 [ 430.835423][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.840204][ T31] [ 430.843495][ T31] Kernel Offset: disabled [ 430.847816][ T31] Rebooting in 86400 seconds..