Warning: Permanently added '10.128.0.156' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 484.634919][ T8466] IPVS: ftp: loaded support on port[0] = 21 [ 721.424389][ T1658] INFO: task kworker/1:1:8458 blocked for more than 143 seconds. [ 721.432334][ T1658] Not tainted 5.11.0-rc3-syzkaller #0 [ 721.441946][ T1658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.451479][ T1658] task:kworker/1:1 state:D stack:29232 pid: 8458 ppid: 2 flags:0x00004000 [ 721.461528][ T1658] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.468772][ T1658] Call Trace: [ 721.472101][ T1658] __schedule+0x90c/0x21a0 [ 721.477955][ T1658] ? io_schedule_timeout+0x140/0x140 [ 721.483263][ T1658] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.489768][ T1658] ? lockdep_hardirqs_on+0x79/0x100 [ 721.495794][ T1658] schedule+0xcf/0x270 [ 721.499891][ T1658] schedule_preempt_disabled+0xf/0x20 [ 721.506496][ T1658] __mutex_lock+0x81a/0x1110 [ 721.512066][ T1658] ? addrconf_verify_work+0xa/0x20 [ 721.518314][ T1658] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.523710][ T1658] ? lock_release+0x710/0x710 [ 721.529651][ T1658] ? lock_downgrade+0x6d0/0x6d0 [ 721.535284][ T1658] addrconf_verify_work+0xa/0x20 [ 721.540241][ T1658] process_one_work+0x98d/0x15f0 [ 721.546468][ T1658] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.551896][ T1658] ? rwlock_bug.part.0+0x90/0x90 [ 721.558046][ T1658] ? _raw_spin_lock_irq+0x41/0x50 [ 721.563105][ T1658] worker_thread+0x64c/0x1120 [ 721.570199][ T1658] ? __kthread_parkme+0x13f/0x1e0 [ 721.576172][ T1658] ? process_one_work+0x15f0/0x15f0 [ 721.581404][ T1658] kthread+0x3b1/0x4a0 [ 721.586656][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.592588][ T1658] ret_from_fork+0x1f/0x30 [ 721.598248][ T1658] [ 721.598248][ T1658] Showing all locks held in the system: [ 721.606786][ T1658] 1 lock held by khungtaskd/1658: [ 721.611817][ T1658] #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.624112][ T1658] 1 lock held by in:imklog/8179: [ 721.629832][ T1658] #0: ffff888011b8b770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.639809][ T1658] 3 locks held by kworker/1:1/8458: [ 721.645744][ T1658] #0: ffff888020e16d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 721.657483][ T1658] #1: ffffc9000147fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 721.668610][ T1658] #2: ffffffff8ca586a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 721.678803][ T1658] 1 lock held by syz-executor896/8488: [ 721.685642][ T1658] [ 721.687977][ T1658] ============================================= [ 721.687977][ T1658] [ 721.699203][ T1658] NMI backtrace for cpu 1 [ 721.703567][ T1658] CPU: 1 PID: 1658 Comm: khungtaskd Not tainted 5.11.0-rc3-syzkaller #0 [ 721.711896][ T1658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.721956][ T1658] Call Trace: [ 721.725236][ T1658] dump_stack+0x107/0x163 [ 721.729635][ T1658] nmi_cpu_backtrace.cold+0x44/0xd7 [ 721.734855][ T1658] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.740224][ T1658] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.746292][ T1658] watchdog+0xd43/0xfa0 [ 721.750774][ T1658] ? reset_hung_task_detector+0x30/0x30 [ 721.756336][ T1658] kthread+0x3b1/0x4a0 [ 721.760416][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.766322][ T1658] ret_from_fork+0x1f/0x30 [ 721.770922][ T1658] Sending NMI from CPU 1 to CPUs 0: [ 721.776779][ C0] NMI backtrace for cpu 0 [ 721.776789][ C0] CPU: 0 PID: 4895 Comm: systemd-journal Not tainted 5.11.0-rc3-syzkaller #0 [ 721.776799][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.776808][ C0] RIP: 0010:check_memory_region+0x9/0x180 [ 721.776820][ C0] Code: 00 48 89 f2 be f5 00 00 00 e9 b3 11 27 02 0f 1f 00 48 89 f2 be f8 00 00 00 e9 a3 11 27 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 <49> 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 0f 82 18 01 00 00 48 b8 [ 721.776836][ C0] RSP: 0018:ffffc9000180fbf8 EFLAGS: 00000002 [ 721.776848][ C0] RAX: 0000000000000000 RBX: 1ffff92000301f81 RCX: ffffffff815976d1 [ 721.776856][ C0] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8f23dee8 [ 721.776865][ C0] RBP: ffffffff8f23dee8 R08: 0000000000000000 R09: ffffffff8ed307a7 [ 721.776874][ C0] R10: fffffbfff1da60f4 R11: 0000000000000000 R12: ffffffff8f23def0 [ 721.776882][ C0] R13: ffffffff8f23def8 R14: 1ffff92000301f99 R15: ffffffff894d04a0 [ 721.776891][ C0] FS: 00007fc32b2388c0(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 721.776900][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 721.776908][ C0] CR2: 00007ffd10ec2770 CR3: 0000000011c2f000 CR4: 00000000001506f0 [ 721.776916][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 721.776925][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 721.776932][ C0] Call Trace: [ 721.776937][ C0] do_raw_spin_lock+0x111/0x2b0 [ 721.776942][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 721.776948][ C0] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 721.776954][ C0] _raw_spin_lock_irqsave+0x41/0x50 [ 721.776960][ C0] ? debug_object_activate+0x12e/0x3e0 [ 721.776966][ C0] debug_object_activate+0x12e/0x3e0 [ 721.776972][ C0] ? debug_object_assert_init+0x2e0/0x2e0 [ 721.776978][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 721.776984][ C0] ? _raw_spin_unlock_irqrestore+0x42/0x50 [ 721.776990][ C0] debug_object_activate+0x337/0x3e0 [ 721.776996][ C0] ? debug_object_assert_init+0x2e0/0x2e0 [ 721.777003][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.777010][ C0] ? percpu_counter_add_batch+0xbd/0x180 [ 721.777015][ C0] ? get_max_files+0x10/0x10 [ 721.777021][ C0] call_rcu+0x2c/0x700 [ 721.777026][ C0] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.777031][ C0] task_work_run+0xdd/0x190 [ 721.777037][ C0] exit_to_user_mode_prepare+0x249/0x250 [ 721.777043][ C0] syscall_exit_to_user_mode+0x19/0x50 [ 721.777049][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.777055][ C0] RIP: 0033:0x7fc32a7c8840 [ 721.777066][ C0] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 721.777081][ C0] RSP: 002b:00007ffe5a233f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 721.777095][ C0] RAX: fffffffffffffffe RBX: 00007ffe5a234230 RCX: 00007fc32a7c8840 [ 721.777104][ C0] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055ac24fed640 [ 721.777112][ C0] RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff [ 721.777121][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 721.777130][ C0] R13: 000055ac24fe0040 R14: 00007ffe5a2341f0 R15: 000055ac24fed690 [ 721.777278][ T1658] Kernel panic - not syncing: hung_task: blocked tasks [ 722.098448][ T1658] CPU: 1 PID: 1658 Comm: khungtaskd Not tainted 5.11.0-rc3-syzkaller #0 [ 722.106779][ T1658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.116831][ T1658] Call Trace: [ 722.120110][ T1658] dump_stack+0x107/0x163 [ 722.124453][ T1658] panic+0x306/0x73d [ 722.128384][ T1658] ? __warn_printk+0xf3/0xf3 [ 722.132989][ T1658] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.138191][ T1658] ? preempt_schedule_thunk+0x16/0x18 [ 722.143573][ T1658] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 722.149741][ T1658] ? watchdog.cold+0x5/0x158 [ 722.154375][ T1658] watchdog.cold+0x16/0x158 [ 722.158892][ T1658] ? reset_hung_task_detector+0x30/0x30 [ 722.164467][ T1658] kthread+0x3b1/0x4a0 [ 722.168544][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.174444][ T1658] ret_from_fork+0x1f/0x30 [ 722.179622][ T1658] Kernel Offset: disabled [ 722.183946][ T1658] Rebooting in 86400 seconds..