./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2927020175 <...> Warning: Permanently added '10.128.0.208' (ED25519) to the list of known hosts. execve("./syz-executor2927020175", ["./syz-executor2927020175"], 0x7ffdbe611cb0 /* 10 vars */) = 0 brk(NULL) = 0x55555a782000 brk(0x55555a782d00) = 0x55555a782d00 arch_prctl(ARCH_SET_FS, 0x55555a782380) = 0 set_tid_address(0x55555a782650) = 5862 set_robust_list(0x55555a782660, 24) = 0 rseq(0x55555a782ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2927020175", 4096) = 28 getrandom("\x79\x5a\x0b\x77\xf1\x56\xed\xd2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555a782d00 brk(0x55555a7a3d00) = 0x55555a7a3d00 brk(0x55555a7a4000) = 0x55555a7a4000 mprotect(0x7f1b67b8c000, 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 5863 attached [pid 5863] set_robust_list(0x55555a782660, 24 [pid 5862] <... clone resumed>, child_tidptr=0x55555a782650) = 5863 [pid 5863] <... set_robust_list resumed>) = 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 [pid 5863] write(1, "executing program\n", 18executing program ) = 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, 0x55555a7836f0 /* 2 entries */, 32768) = 48 [pid 5862] getdents64(3, 0x55555a7836f0 /* 0 entries */, 32768) = 0 [pid 5862] close(3) = 0 [ 429.947171][ T31] INFO: task syz-executor292:5863 blocked for more than 143 seconds. [ 429.955343][ T31] Not tainted 6.16.0-syzkaller #0 [ 429.961075][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.969838][ T31] task:syz-executor292 state:D stack:24248 pid:5863 tgid:5863 ppid:5862 task_flags:0x400140 flags:0x00004006 [ 429.981898][ T31] Call Trace: [ 429.985212][ T31] [ 429.988249][ T31] __schedule+0x16aa/0x4c90 [ 429.992851][ T31] ? schedule+0x165/0x360 [ 429.997281][ T31] ? __pfx___schedule+0x10/0x10 [ 430.002263][ T31] ? schedule+0x91/0x360 [ 430.006602][ T31] schedule+0x165/0x360 [ 430.010900][ T31] io_schedule+0x81/0xe0 [ 430.015160][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 430.020627][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 430.026527][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 430.032204][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 430.038343][ T31] ? __lock_acquire+0xab9/0xd20 [ 430.043231][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.048053][ T31] folio_wait_writeback+0xb0/0x100 [ 430.053213][ T31] __filemap_fdatawait_range+0x147/0x230 [ 430.058914][ T31] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 430.065115][ T31] ? wbc_detach_inode+0x137/0x750 [ 430.070218][ T31] file_write_and_wait_range+0x275/0x330 [ 430.076543][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 430.082830][ T31] v9fs_file_fsync+0xcf/0x1a0 [ 430.088357][ T31] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 430.093710][ T31] ? __up_read+0x280/0x680 [ 430.098312][ T31] ? __pfx___up_read+0x10/0x10 [ 430.103124][ T31] ? netfs_file_write_iter+0x189/0x4a0 [ 430.108893][ T31] netfs_file_write_iter+0x3d8/0x4a0 [ 430.114222][ T31] vfs_write+0x54b/0xa90 [ 430.118557][ T31] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 430.124417][ T31] ? __pfx_vfs_write+0x10/0x10 [ 430.129259][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.135009][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 430.140288][ T31] ksys_write+0x145/0x250 [ 430.144644][ T31] ? __pfx_ksys_write+0x10/0x10 [ 430.149573][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.154380][ T31] do_syscall_64+0xfa/0x3b0 [ 430.159045][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.164270][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.170402][ T31] ? clear_bhb_loop+0x60/0xb0 [ 430.175216][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.181346][ T31] RIP: 0033:0x7f1b67b18ef9 [ 430.185796][ T31] RSP: 002b:00007ffccb3ebbd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 430.194362][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f1b67b18ef9 [ 430.202419][ T31] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 430.210443][ T31] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 430.218488][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 430.226721][ T31] R13: 00007f1b67b6204e R14: 0000000000000001 R15: 0000000000000001 [ 430.234748][ T31] [ 430.237838][ T31] [ 430.237838][ T31] Showing all locks held in the system: [ 430.245665][ T31] 1 lock held by khungtaskd/31: [ 430.250661][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.260797][ T31] 2 locks held by kworker/u8:2/36: [ 430.265927][ T31] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 430.277743][ T31] #1: ffffc90000ac7bc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 430.289621][ T31] 2 locks held by getty/5599: [ 430.294296][ T31] #0: ffff88814e4600a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.304209][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.314464][ T31] 1 lock held by syz-executor292/5863: [ 430.319981][ T31] #0: ffff88803523a428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 430.328947][ T31] [ 430.331531][ T31] ============================================= [ 430.331531][ T31] [ 430.340002][ T31] NMI backtrace for cpu 1 [ 430.340016][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.340039][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.340050][ T31] Call Trace: [ 430.340059][ T31] [ 430.340068][ T31] dump_stack_lvl+0x189/0x250 [ 430.340091][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.340118][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.340140][ T31] ? __pfx__printk+0x10/0x10 [ 430.340177][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.340210][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.340233][ T31] ? _printk+0xcf/0x120 [ 430.340260][ T31] ? __pfx__printk+0x10/0x10 [ 430.340287][ T31] ? debug_show_all_locks+0x2e/0x180 [ 430.340308][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.340340][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.340372][ T31] watchdog+0xfee/0x1030 [ 430.340402][ T31] ? watchdog+0x1de/0x1030 [ 430.340435][ T31] kthread+0x70e/0x8a0 [ 430.340465][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.340492][ T31] ? __pfx_kthread+0x10/0x10 [ 430.340520][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.340538][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.340558][ T31] ? __pfx_kthread+0x10/0x10 [ 430.340594][ T31] ret_from_fork+0x3fc/0x770 [ 430.340618][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.340644][ T31] ? __switch_to_asm+0x39/0x70 [ 430.340666][ T31] ? __switch_to_asm+0x33/0x70 [ 430.340687][ T31] ? __pfx_kthread+0x10/0x10 [ 430.340713][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.340753][ T31] [ 430.340762][ T31] Sending NMI from CPU 1 to CPUs 0: [ 430.501130][ C0] NMI backtrace for cpu 0 [ 430.501148][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.501166][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.501175][ C0] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 430.501196][ 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 [ 430.501209][ C0] RSP: 0018:ffffffff8de07d80 EFLAGS: 000002c2 [ 430.501225][ C0] RAX: 6bf0f2c6167cf000 RBX: ffffffff81976918 RCX: 6bf0f2c6167cf000 [ 430.501237][ C0] RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40 [ 430.501248][ C0] RBP: ffffffff8de07ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb [ 430.501259][ C0] R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fa0b3f0 [ 430.501270][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a50 [ 430.501281][ C0] FS: 0000000000000000(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000 [ 430.501294][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.501305][ C0] CR2: 000055d36cf42660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 430.501322][ C0] Call Trace: [ 430.501331][ C0] [ 430.501337][ C0] default_idle+0x13/0x20 [ 430.501356][ C0] default_idle_call+0x74/0xb0 [ 430.501374][ C0] do_idle+0x1e8/0x510 [ 430.501394][ C0] ? __pfx_do_idle+0x10/0x10 [ 430.501410][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.501427][ C0] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 430.501450][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.501475][ C0] cpu_startup_entry+0x44/0x60 [ 430.501492][ C0] rest_init+0x2de/0x300 [ 430.501510][ C0] ? __pfx_x86_late_time_init+0x10/0x10 [ 430.501637][ C0] start_kernel+0x47d/0x500 [ 430.501676][ C0] x86_64_start_reservations+0x24/0x30 [ 430.501697][ C0] x86_64_start_kernel+0x143/0x1c0 [ 430.501718][ C0] common_startup_64+0x13e/0x147 [ 430.501744][ C0] [ 430.502113][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.502128][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.502149][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.502160][ T31] Call Trace: [ 430.502168][ T31] [ 430.502176][ T31] dump_stack_lvl+0x99/0x250 [ 430.502200][ T31] ? __asan_memcpy+0x40/0x70 [ 430.502226][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.502247][ T31] ? __pfx__printk+0x10/0x10 [ 430.502281][ T31] panic+0x2db/0x790 [ 430.502306][ T31] ? __pfx_panic+0x10/0x10 [ 430.502324][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.502350][ T31] ? irq_work_queue+0xc3/0x140 [ 430.502386][ T31] watchdog+0x102d/0x1030 [ 430.502414][ T31] ? watchdog+0x1de/0x1030 [ 430.502447][ T31] kthread+0x70e/0x8a0 [ 430.502474][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.502498][ T31] ? __pfx_kthread+0x10/0x10 [ 430.502523][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.502540][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.502557][ T31] ? __pfx_kthread+0x10/0x10 [ 430.502589][ T31] ret_from_fork+0x3fc/0x770 [ 430.502610][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.502633][ T31] ? __switch_to_asm+0x39/0x70 [ 430.502654][ T31] ? __switch_to_asm+0x33/0x70 [ 430.502674][ T31] ? __pfx_kthread+0x10/0x10 [ 430.502699][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.502735][ T31] [ 430.841926][ T31] Kernel Offset: disabled [ 430.846249][ T31] Rebooting in 86400 seconds..