./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2959308725 <...> Warning: Permanently added '10.128.0.141' (ED25519) to the list of known hosts. execve("./syz-executor2959308725", ["./syz-executor2959308725"], 0x7ffddafc14d0 /* 10 vars */) = 0 brk(NULL) = 0x55557880d000 brk(0x55557880dd00) = 0x55557880dd00 arch_prctl(ARCH_SET_FS, 0x55557880d380) = 0 set_tid_address(0x55557880d650) = 5862 set_robust_list(0x55557880d660, 24) = 0 rseq(0x55557880dca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2959308725", 4096) = 28 getrandom("\x7e\x22\x34\xf5\x64\xd4\x61\x50", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557880dd00 brk(0x55557882ed00) = 0x55557882ed00 brk(0x55557882f000) = 0x55557882f000 mprotect(0x7f3c9dc3f000, 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, child_tidptr=0x55557880d650) = 5863 ./strace-static-x86_64: Process 5863 attached [pid 5863] set_robust_list(0x55557880d660, 24) = 0 [pid 5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5863] setpgid(0, 0) = 0 [pid 5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5863] write(3, "1000", 4) = 4 [pid 5863] close(3) = 0 executing program [pid 5863] write(1, "executing program\n", 18) = 18 [pid 5863] creat("./file0", 000) = 3 [pid 5863] pipe2([4, 5], 0) = 0 [pid 5863] 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 5863] dup(5) = 6 [pid 5863] 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 5863] 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 5863] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = 0 [pid 5863] chmod("./file0", 000) = 0 [pid 5863] open("./file0", O_WRONLY) = 7 [pid 5863] 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 5862] kill(-5863, SIGKILL) = 0 [pid 5862] kill(5863, SIGKILL) = 0 [pid 5862] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5862] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5862] getdents64(3, 0x55557880e6f0 /* 2 entries */, 32768) = 48 [pid 5862] getdents64(3, 0x55557880e6f0 /* 0 entries */, 32768) = 0 [pid 5862] close(3) = 0 [ 286.667882][ T31] INFO: task syz-executor295:5863 blocked for more than 143 seconds. [ 286.676174][ T31] Not tainted 6.16.0-syzkaller #0 [ 286.681917][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.690958][ T31] task:syz-executor295 state:D stack:25144 pid:5863 tgid:5863 ppid:5862 task_flags:0x400140 flags:0x00004006 [ 286.703271][ T31] Call Trace: [ 286.706859][ T31] [ 286.710026][ T31] __schedule+0x16aa/0x4c90 [ 286.714613][ T31] ? schedule+0x165/0x360 [ 286.719192][ T31] ? __pfx___schedule+0x10/0x10 [ 286.724268][ T31] ? schedule+0x91/0x360 [ 286.728614][ T31] schedule+0x165/0x360 [ 286.732891][ T31] io_schedule+0x81/0xe0 [ 286.737468][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 286.742835][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 286.748758][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 286.754431][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 286.760572][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.765701][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.770499][ T31] folio_wait_writeback+0xb0/0x100 [ 286.775887][ T31] __filemap_fdatawait_range+0x147/0x230 [ 286.781723][ T31] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 286.788107][ T31] ? wbc_detach_inode+0x137/0x750 [ 286.793295][ T31] file_write_and_wait_range+0x275/0x330 [ 286.799117][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 286.805403][ T31] v9fs_file_fsync+0xcf/0x1a0 [ 286.810186][ T31] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 286.815556][ T31] ? __up_read+0x280/0x680 [ 286.820083][ T31] ? __pfx___up_read+0x10/0x10 [ 286.824879][ T31] ? netfs_file_write_iter+0x189/0x4a0 [ 286.830548][ T31] netfs_file_write_iter+0x3d8/0x4a0 [ 286.835923][ T31] vfs_write+0x54b/0xa90 [ 286.840300][ T31] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 286.846151][ T31] ? __pfx_vfs_write+0x10/0x10 [ 286.851068][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.856379][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.861690][ T31] ksys_write+0x145/0x250 [ 286.866097][ T31] ? __pfx_ksys_write+0x10/0x10 [ 286.871160][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.876028][ T31] do_syscall_64+0xfa/0x3b0 [ 286.880845][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.886455][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.892647][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.897451][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.903475][ T31] RIP: 0033:0x7f3c9dbcbef9 [ 286.907994][ T31] RSP: 002b:00007ffce109c098 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 286.916778][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f3c9dbcbef9 [ 286.924783][ T31] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 286.932945][ T31] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 286.941028][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 286.949254][ T31] R13: 00007f3c9dc1504e R14: 0000000000000001 R15: 0000000000000001 [ 286.957503][ T31] [ 286.960554][ T31] [ 286.960554][ T31] Showing all locks held in the system: [ 286.968644][ T31] 1 lock held by khungtaskd/31: [ 286.973545][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.983773][ T31] 2 locks held by kworker/u8:5/753: [ 286.989104][ T31] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 287.001235][ T31] #1: ffffc90003157bc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 287.013231][ T31] 2 locks held by getty/5595: [ 287.018078][ T31] #0: ffff8880355320a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.042000][ T31] #1: ffffc900036c42f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.052287][ T31] 1 lock held by syz-executor295/5863: [ 287.057918][ T31] #0: ffff888068d7c428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 287.066917][ T31] [ 287.069382][ T31] ============================================= [ 287.069382][ T31] [ 287.078043][ T31] NMI backtrace for cpu 1 [ 287.078059][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.078081][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.078091][ T31] Call Trace: [ 287.078099][ T31] [ 287.078106][ T31] dump_stack_lvl+0x189/0x250 [ 287.078128][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.078155][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.078175][ T31] ? __pfx__printk+0x10/0x10 [ 287.078209][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.078241][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.078263][ T31] ? _printk+0xcf/0x120 [ 287.078291][ T31] ? __pfx__printk+0x10/0x10 [ 287.078319][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.078359][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.078390][ T31] watchdog+0xfee/0x1030 [ 287.078419][ T31] ? watchdog+0x1de/0x1030 [ 287.078456][ T31] kthread+0x70e/0x8a0 [ 287.078486][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.078513][ T31] ? __pfx_kthread+0x10/0x10 [ 287.078540][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.078559][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.078579][ T31] ? __pfx_kthread+0x10/0x10 [ 287.078606][ T31] ret_from_fork+0x3fc/0x770 [ 287.078628][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.078653][ T31] ? __switch_to_asm+0x39/0x70 [ 287.078676][ T31] ? __switch_to_asm+0x33/0x70 [ 287.078698][ T31] ? __pfx_kthread+0x10/0x10 [ 287.078724][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.078766][ T31] [ 287.078774][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.236510][ C0] NMI backtrace for cpu 0 [ 287.236527][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.236545][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.236554][ C0] RIP: 0010:sched_balance_rq+0x144c/0x57a0 [ 287.236577][ C0] Code: 28 84 c0 0f 85 f7 0c 00 00 c7 03 01 00 00 00 4d 89 ee 4c 8b ac 24 c0 03 00 00 49 8d 5d 2c 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 38 0a 00 00 8b 03 48 89 44 24 60 48 8b 9c 24 80 00 00 [ 287.236590][ C0] RSP: 0018:ffffc90000007780 EFLAGS: 00000a03 [ 287.236606][ C0] RAX: 0000000000000000 RBX: ffff88801b6ebc2c RCX: 0000000000000002 [ 287.236617][ C0] RDX: 0000000000000001 RSI: ffff8880b8739ed8 RDI: 1ffff110170e73db [ 287.236627][ C0] RBP: ffffc90000007c38 R08: ffffc900000079d7 R09: 0000000000000000 [ 287.236638][ C0] R10: ffffc90000007980 R11: fffff52000000f3b R12: ffffc900000079b4 [ 287.236649][ C0] R13: ffff88801b6ebc00 R14: dffffc0000000000 R15: 1ffff92000000f36 [ 287.236660][ C0] FS: 0000000000000000(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000 [ 287.236674][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.236685][ C0] CR2: 00005572c2565660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.236702][ C0] Call Trace: [ 287.236708][ C0] [ 287.236731][ C0] ? __pfx_sched_balance_rq+0x10/0x10 [ 287.236756][ C0] ? __lock_acquire+0xab9/0xd20 [ 287.236782][ C0] ? __lock_acquire+0xab9/0xd20 [ 287.236802][ C0] ? sched_clock+0x3f/0x60 [ 287.236827][ C0] sched_balance_domains+0x49f/0x9e0 [ 287.236845][ C0] ? sched_balance_domains+0x121/0x9e0 [ 287.236862][ C0] _nohz_idle_balance+0x59d/0x810 [ 287.236880][ C0] ? sched_clock+0x3f/0x60 [ 287.236904][ C0] ? __pfx__nohz_idle_balance+0x10/0x10 [ 287.236935][ C0] ? sched_balance_softirq+0x13/0x1a0 [ 287.236958][ C0] handle_softirqs+0x283/0x870 [ 287.236976][ C0] ? __irq_exit_rcu+0xca/0x1f0 [ 287.236994][ C0] ? __pfx_handle_softirqs+0x10/0x10 [ 287.237008][ C0] ? sched_clock_cpu+0x74/0x430 [ 287.237026][ C0] ? irqtime_account_irq+0xb6/0x1c0 [ 287.237047][ C0] __irq_exit_rcu+0xca/0x1f0 [ 287.237063][ C0] ? __pfx___irq_exit_rcu+0x10/0x10 [ 287.237080][ C0] ? rcu_is_watching+0x15/0xb0 [ 287.237098][ C0] irq_exit_rcu+0x9/0x30 [ 287.237112][ C0] sysvec_call_function_single+0xa3/0xc0 [ 287.237128][ C0] [ 287.237133][ C0] [ 287.237139][ C0] asm_sysvec_call_function_single+0x1a/0x20 [ 287.237155][ C0] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 287.237171][ C0] Code: 53 de 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 ad 21 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 287.237183][ C0] RSP: 0018:ffffffff8de07d80 EFLAGS: 000002c2 [ 287.237195][ C0] RAX: 8bc63439e8f5e200 RBX: ffffffff81976918 RCX: 8bc63439e8f5e200 [ 287.237206][ C0] RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40 [ 287.237217][ C0] RBP: ffffffff8de07ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb [ 287.237228][ C0] R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fa0b3f0 [ 287.237239][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a50 [ 287.237251][ C0] ? do_idle+0x1e8/0x510 [ 287.237271][ C0] default_idle+0x13/0x20 [ 287.237288][ C0] default_idle_call+0x74/0xb0 [ 287.237306][ C0] do_idle+0x1e8/0x510 [ 287.237324][ C0] ? __pfx_do_idle+0x10/0x10 [ 287.237340][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.237356][ C0] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 287.237379][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 287.237404][ C0] cpu_startup_entry+0x44/0x60 [ 287.237421][ C0] rest_init+0x2de/0x300 [ 287.237439][ C0] ? __pfx_x86_late_time_init+0x10/0x10 [ 287.237474][ C0] start_kernel+0x47d/0x500 [ 287.237493][ C0] x86_64_start_reservations+0x24/0x30 [ 287.237514][ C0] x86_64_start_kernel+0x143/0x1c0 [ 287.237535][ C0] common_startup_64+0x13e/0x147 [ 287.237560][ C0] [ 287.237568][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.058 msecs [ 287.238541][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.647535][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.657267][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.667332][ T31] Call Trace: [ 287.670777][ T31] [ 287.673807][ T31] dump_stack_lvl+0x99/0x250 [ 287.678514][ T31] ? __asan_memcpy+0x40/0x70 [ 287.683139][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.688454][ T31] ? __pfx__printk+0x10/0x10 [ 287.693070][ T31] panic+0x2db/0x790 [ 287.696982][ T31] ? __pfx_panic+0x10/0x10 [ 287.701408][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.707574][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.713148][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.719325][ T31] watchdog+0x102d/0x1030 [ 287.723758][ T31] ? watchdog+0x1de/0x1030 [ 287.728282][ T31] kthread+0x70e/0x8a0 [ 287.732368][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.737145][ T31] ? __pfx_kthread+0x10/0x10 [ 287.741757][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.746972][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.752355][ T31] ? __pfx_kthread+0x10/0x10 [ 287.757044][ T31] ret_from_fork+0x3fc/0x770 [ 287.761678][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.766888][ T31] ? __switch_to_asm+0x39/0x70 [ 287.771670][ T31] ? __switch_to_asm+0x33/0x70 [ 287.776473][ T31] ? __pfx_kthread+0x10/0x10 [ 287.781173][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.786048][ T31] [ 287.789377][ T31] Kernel Offset: disabled [ 287.793792][ T31] Rebooting in 86400 seconds..