./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2143386455 <...> forked to background, child pid 3184 no interfaces have a carrier [ 25.354876][ T3185] 8021q: adding VLAN 0 to HW filter on device bond0 [ 25.366378][ T3185] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.112' (ECDSA) to the list of known hosts. execve("./syz-executor2143386455", ["./syz-executor2143386455"], 0x7ffc0aab0db0 /* 10 vars */) = 0 brk(NULL) = 0x555556925000 brk(0x555556925c40) = 0x555556925c40 arch_prctl(ARCH_SET_FS, 0x555556925300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2143386455", 4096) = 28 brk(0x555556946c40) = 0x555556946c40 brk(0x555556947000) = 0x555556947000 mprotect(0x7ff0205ae000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555569255d0) = 3607 ./strace-static-x86_64: Process 3607 attached [pid 3607] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3607] setpgid(0, 0) = 0 [pid 3607] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3607] write(3, "1000", 4) = 4 [pid 3607] close(3) = 0 [pid 3607] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3 [pid 3607] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4 [pid 3607] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0 [pid 3607] ioctl(4, NBD_SET_SOCK, 5) = 0 [pid 3607] ioctl(3, NBD_SET_SIZE_BLOCKS, 9) = 0 [pid 3607] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY|O_CREAT, 000) = 7 syzkaller login: [ 48.231737][ T3607] nbd0: detected capacity change from 0 to 18 [pid 3607] ioctl(7, NBD_DO_IT [pid 3606] kill(-3607, SIGKILL) = 0 [pid 3606] kill(3607, SIGKILL) = 0 [pid 3607] <... ioctl resumed>) = ? [ 53.186865][ T3607] block nbd0: shutting down sockets [pid 3606] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 3606] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 3606] getdents64(3, 0x555556926620 /* 2 entries */, 32768) = 48 [pid 3606] getdents64(3, 0x555556926620 /* 0 entries */, 32768) = 0 [pid 3606] close(3) = 0 [ 76.230065][ T142] cfg80211: failed to load regulatory.db [ 78.788388][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 30 seconds [ 108.868373][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 60 seconds [ 111.233754][ T2972] udevd[2972]: worker [3609] /devices/virtual/block/nbd0 is taking a long time [ 138.948326][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 90 seconds [ 169.028338][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 120 seconds [ 199.108333][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 150 seconds [ 228.388284][ T2972] udevd[2972]: worker [3609] /devices/virtual/block/nbd0 timeout; kill it [ 228.397400][ T2972] udevd[2972]: seq 7462 '/devices/virtual/block/nbd0' killed [ 229.188366][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 180 seconds [ 259.268342][ T9] block nbd0: Possible stuck request ffff88801e790000: control (read@0,4096B). Runtime 210 seconds [ 286.148314][ T28] INFO: task syz-executor214:3607 blocked for more than 143 seconds. [ 286.156487][ T28] Not tainted 6.0.0-rc2-syzkaller-00327-g8379c0b31fbc #0 [ 286.164295][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.173044][ T28] task:syz-executor214 state:D stack:25984 pid: 3607 ppid: 3606 flags:0x00004006 [ 286.182317][ T28] Call Trace: [ 286.185614][ T28] [ 286.188606][ T28] __schedule+0x957/0xe20 [ 286.193071][ T28] ? release_firmware_map_entry+0x184/0x184 [ 286.199143][ T28] ? __mutex_trylock_common+0x8e/0x2f0 [ 286.204674][ T28] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.209977][ T28] schedule+0xcb/0x190 [ 286.214053][ T28] schedule_preempt_disabled+0xf/0x20 [ 286.219459][ T28] __mutex_lock_common+0xecf/0x26c0 [ 286.224711][ T28] ? blkdev_put+0x100/0x730 [ 286.229296][ T28] ? mutex_lock_io_nested+0x60/0x60 [ 286.234499][ T28] ? __fsnotify_parent+0x4fd/0x710 [ 286.239681][ T28] ? blkdev_open+0x2e0/0x2e0 [ 286.244271][ T28] mutex_lock_nested+0x17/0x20 [ 286.249107][ T28] blkdev_put+0x100/0x730 [ 286.253475][ T28] ? lockdep_hardirqs_on_prepare+0x448/0x7b0 [ 286.259491][ T28] ? blkdev_open+0x2e0/0x2e0 [ 286.264084][ T28] blkdev_close+0x55/0x80 [ 286.268468][ T28] __fput+0x3b9/0x820 [ 286.272534][ T28] task_work_run+0x146/0x1c0 [ 286.277135][ T28] do_exit+0x55e/0x20a0 [ 286.281364][ T28] ? mm_update_next_owner+0x6d0/0x6d0 [ 286.286742][ T28] ? lockdep_hardirqs_on_prepare+0x448/0x7b0 [ 286.292795][ T28] ? print_irqtrace_events+0x220/0x220 [ 286.298294][ T28] ? _raw_spin_lock_irq+0xdb/0x110 [ 286.303424][ T28] do_group_exit+0x23b/0x2f0 [ 286.308022][ T28] ? _raw_spin_unlock_irq+0x1f/0x40 [ 286.313272][ T28] ? lockdep_hardirqs_on+0x95/0x140 [ 286.318549][ T28] get_signal+0x172f/0x1780 [ 286.323085][ T28] ? ptrace_notify+0x340/0x340 [ 286.327833][ T28] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.333092][ T28] arch_do_signal_or_restart+0x8d/0x750 [ 286.338681][ T28] ? _raw_spin_unlock_irq+0x2a/0x40 [ 286.343872][ T28] ? ptrace_notify+0x245/0x340 [ 286.348703][ T28] ? get_sigframe_size+0x10/0x10 [ 286.353649][ T28] ? vtime_user_exit+0x2b2/0x3e0 [ 286.358647][ T28] ? exit_to_user_mode_loop+0x42/0x160 [ 286.364133][ T28] exit_to_user_mode_loop+0x74/0x160 [ 286.369466][ T28] exit_to_user_mode_prepare+0xad/0x110 [ 286.375030][ T28] syscall_exit_to_user_mode+0x2e/0x60 [ 286.380550][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.386451][ T28] RIP: 0033:0x7ff0205416f9 [ 286.390924][ T28] RSP: 002b:00007ffd6034db48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 286.399367][ T28] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007ff0205416f9 [ 286.407328][ T28] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 [ 286.415354][ T28] RBP: 0000000000000000 R08: 00007ffd6034dce8 R09: 00007ffd6034dce8 [ 286.423380][ T28] R10: 000000000000ffff R11: 0000000000000246 R12: 00007ff020500780 [ 286.431439][ T28] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 286.439516][ T28] [ 286.442557][ T28] [ 286.442557][ T28] Showing all locks held in the system: [ 286.450341][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.455623][ T28] #0: ffffffff8cd20a30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.466166][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.471544][ T28] #0: ffffffff8cd21230 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.482584][ T28] 1 lock held by khungtaskd/28: [ 286.487434][ T28] #0: ffffffff8cd20860 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 286.496852][ T28] 2 locks held by getty/3282: [ 286.501548][ T28] #0: ffff88814b52b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 [ 286.511425][ T28] #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 [ 286.521604][ T28] 1 lock held by syz-executor214/3607: [ 286.527050][ T28] #0: ffff88801e6bb4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x100/0x730 [ 286.536499][ T28] 1 lock held by udevd/3609: [ 286.541108][ T28] #0: ffff88801e6bb4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfd/0xa40 [ 286.551185][ T28] [ 286.553514][ T28] ============================================= [ 286.553514][ T28] [ 286.561982][ T28] NMI backtrace for cpu 1 [ 286.566321][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-syzkaller-00327-g8379c0b31fbc #0 [ 286.576113][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.586156][ T28] Call Trace: [ 286.589427][ T28] [ 286.592349][ T28] dump_stack_lvl+0x1e3/0x2cb [ 286.597026][ T28] ? io_notif_register+0x5e7/0x5e7 [ 286.602126][ T28] ? panic+0x76b/0x76b [ 286.606236][ T28] ? console_unlock+0x6bd/0x6f0 [ 286.611081][ T28] ? console_trylock_spinning+0x450/0x450 [ 286.616794][ T28] ? nmi_cpu_backtrace+0x248/0x4b0 [ 286.621915][ T28] nmi_cpu_backtrace+0x47c/0x4b0 [ 286.626863][ T28] ? vprintk_emit+0x109/0x1e0 [ 286.631534][ T28] ? nmi_trigger_cpumask_backtrace+0x280/0x280 [ 286.637681][ T28] ? _printk+0xcf/0x10f [ 286.641842][ T28] ? panic+0x76b/0x76b [ 286.645902][ T28] ? __wake_up_klogd+0xcd/0x100 [ 286.650745][ T28] ? panic+0x76b/0x76b [ 286.654804][ T28] ? __rcu_read_unlock+0x8f/0x100 [ 286.659821][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.665923][ T28] nmi_trigger_cpumask_backtrace+0x169/0x280 [ 286.671897][ T28] watchdog+0xcd5/0xd20 [ 286.676096][ T28] kthread+0x266/0x300 [ 286.680160][ T28] ? hungtask_pm_notify+0x50/0x50 [ 286.685193][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.689775][ T28] ret_from_fork+0x1f/0x30 [ 286.694209][ T28] [ 286.697329][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.702575][ C0] NMI backtrace for cpu 0 [ 286.702584][ C0] CPU: 0 PID: 41 Comm: kworker/u4:2 Not tainted 6.0.0-rc2-syzkaller-00327-g8379c0b31fbc #0 [ 286.702598][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.702607][ C0] Workqueue: events_unbound toggle_allocation_gate [ 286.702666][ C0] RIP: 0010:rcu_read_lock_sched_held+0x1c/0x130 [ 286.702685][ C0] Code: 9e 22 00 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 57 41 56 41 54 53 48 83 e4 e0 48 83 ec 60 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 48 49 be 00 00 00 00 00 fc ff df 48 c7 04 24 b3 8a b5 [ 286.702696][ C0] RSP: 0018:ffffc90000b275e0 EFLAGS: 00000082 [ 286.702707][ C0] RAX: 3ceeab9e44521e00 RBX: 0000000000000000 RCX: dffffc0000000000 [ 286.702717][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e257028 [ 286.702725][ C0] RBP: ffffc90000b27668 R08: dffffc0000000000 R09: fffffbfff1c4ae06 [ 286.702735][ C0] R10: fffffbfff1c4ae06 R11: 1ffffffff1c4ae05 R12: 0000000000000000 [ 286.702744][ C0] R13: dffffc0000000000 R14: ffffffff8cdf7a00 R15: 0000000000000000 [ 286.702754][ C0] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 286.702765][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.702775][ C0] CR2: 000056512ea45600 CR3: 000000000ca8e000 CR4: 00000000003506f0 [ 286.702787][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.702794][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.702803][ C0] Call Trace: [ 286.702807][ C0] [ 286.702813][ C0] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 286.702829][ C0] ? native_set_ldt+0x330/0x330 [ 286.702867][ C0] ? read_lock_is_recursive+0x10/0x10 [ 286.702884][ C0] trace_tlb_flush+0x7a/0x190 [ 286.702905][ C0] switch_mm_irqs_off+0x59d/0x8f0 [ 286.702922][ C0] ? switch_mm+0x190/0x190 [ 286.702934][ C0] ? text_poke_memcpy+0x5/0x10 [ 286.702948][ C0] ? text_poke_memcpy+0x5/0x10 [ 286.702961][ C0] ? __text_poke+0x9d0/0x9d0 [ 286.702972][ C0] ? kmem_cache_alloc_node_trace+0xe5/0x360 [ 286.703001][ C0] __text_poke+0x749/0x9d0 [ 286.703014][ C0] ? kmem_cache_alloc_node_trace+0xe5/0x360 [ 286.703029][ C0] ? __text_poke+0x9d0/0x9d0 [ 286.703042][ C0] ? text_poke+0x90/0x90 [ 286.703053][ C0] ? __kmalloc_node_track_caller+0xfd/0x3f0 [ 286.703073][ C0] ? perf_event_text_poke+0x24f/0x320 [ 286.703120][ C0] ? rcu_read_lock_sched_held+0x89/0x130 [ 286.703137][ C0] ? perf_event_bpf_output+0x240/0x240 [ 286.703160][ C0] text_poke_bp_batch+0x6bc/0x970 [ 286.703181][ C0] ? __kmalloc_node_track_caller+0xfe/0x3f0 [ 286.703196][ C0] ? text_poke_loc_init+0x510/0x510 [ 286.703212][ C0] ? __jump_label_update+0x38e/0x3b0 [ 286.703245][ C0] text_poke_finish+0x16/0x30 [ 286.703257][ C0] arch_jump_label_transform_apply+0x13/0x20 [ 286.703272][ C0] static_key_disable_cpuslocked+0xc8/0x1b0 [ 286.703289][ C0] static_key_disable+0x16/0x20 [ 286.703303][ C0] toggle_allocation_gate+0x3d8/0x470 [ 286.703318][ C0] ? virt_to_slab+0x2c0/0x2c0 [ 286.703334][ C0] ? rcu_read_lock_sched_held+0x89/0x130 [ 286.703349][ C0] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 286.703363][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 286.703386][ C0] process_one_work+0x81c/0xd10 [ 286.703424][ C0] ? worker_detach_from_pool+0x260/0x260 [ 286.703442][ C0] ? _raw_spin_lock_irqsave+0x120/0x120 [ 286.703456][ C0] ? kthread_data+0x4d/0xc0 [ 286.703472][ C0] ? wq_worker_running+0x95/0x190 [ 286.703487][ C0] worker_thread+0xb14/0x1330 [ 286.703516][ C0] kthread+0x266/0x300 [ 286.703529][ C0] ? rcu_lock_release+0x20/0x20 [ 286.703543][ C0] ? kthread_blkcg+0xd0/0xd0 [ 286.703557][ C0] ret_from_fork+0x1f/0x30 [ 286.703579][ C0] [ 286.703585][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.009 msecs [ 286.704618][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 287.080887][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-syzkaller-00327-g8379c0b31fbc #0 [ 287.090682][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 287.100725][ T28] Call Trace: [ 287.103998][ T28] [ 287.106923][ T28] dump_stack_lvl+0x1e3/0x2cb [ 287.111598][ T28] ? io_notif_register+0x5e7/0x5e7 [ 287.116716][ T28] ? panic+0x76b/0x76b [ 287.120782][ T28] ? vscnprintf+0x59/0x80 [ 287.125108][ T28] panic+0x316/0x76b [ 287.128995][ T28] ? schedule_preempt_disabled+0x20/0x20 [ 287.134626][ T28] ? nmi_trigger_cpumask_backtrace+0x205/0x280 [ 287.140776][ T28] ? fb_is_primary_device+0xcc/0xcc [ 287.145966][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 287.152027][ T28] ? nmi_trigger_cpumask_backtrace+0x205/0x280 [ 287.158175][ T28] ? nmi_trigger_cpumask_backtrace+0x265/0x280 [ 287.164340][ T28] watchdog+0xd16/0xd20 [ 287.168495][ T28] kthread+0x266/0x300 [ 287.172558][ T28] ? hungtask_pm_notify+0x50/0x50 [ 287.177572][ T28] ? kthread_blkcg+0xd0/0xd0 [ 287.182155][ T28] ret_from_fork+0x1f/0x30 [ 287.186573][ T28] [ 287.189861][ T28] Kernel Offset: disabled [ 287.194185][ T28] Rebooting in 86400 seconds..