Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 614.757185][ T8398] IPVS: ftp: loaded support on port[0] = 21 [ 859.561781][ T1645] INFO: task kworker/1:2:3645 blocked for more than 143 seconds. [ 859.569750][ T1645] Not tainted 5.11.0-syzkaller #0 [ 859.578767][ T1645] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.588235][ T1645] task:kworker/1:2 state:D stack:26432 pid: 3645 ppid: 2 flags:0x00004000 [ 859.598207][ T1645] Workqueue: ipv6_addrconf addrconf_verify_work [ 859.605374][ T1645] Call Trace: [ 859.608669][ T1645] __schedule+0x999/0xe70 [ 859.614293][ T1645] schedule+0x14b/0x200 [ 859.618480][ T1645] schedule_preempt_disabled+0xf/0x20 [ 859.625113][ T1645] __mutex_lock_common+0x124f/0x2f00 [ 859.630426][ T1645] ? addrconf_verify_work+0xa/0x20 [ 859.636699][ T1645] mutex_lock_nested+0x1a/0x20 [ 859.641472][ T1645] addrconf_verify_work+0xa/0x20 [ 859.647806][ T1645] process_one_work+0x789/0xfc0 [ 859.653609][ T1645] worker_thread+0xac1/0x1300 [ 859.658328][ T1645] ? __kthread_parkme+0x148/0x190 [ 859.664706][ T1645] ? rcu_lock_release+0x20/0x20 [ 859.669577][ T1645] kthread+0x39a/0x3c0 [ 859.674814][ T1645] ? rcu_lock_release+0x20/0x20 [ 859.679681][ T1645] ? kthread_blkcg+0xd0/0xd0 [ 859.685542][ T1645] ret_from_fork+0x1f/0x30 [ 859.690130][ T1645] [ 859.690130][ T1645] Showing all locks held in the system: [ 859.699474][ T1645] 1 lock held by khungtaskd/1645: [ 859.707155][ T1645] #0: ffffffff8c711680 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 859.717343][ T1645] 3 locks held by kworker/1:2/3645: [ 859.723334][ T1645] #0: ffff888147206d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 [ 859.735004][ T1645] #1: ffffc900024d7d78 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 [ 859.745930][ T1645] #2: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 859.756129][ T1645] 1 lock held by in:imklog/8108: [ 859.761081][ T1645] #0: ffff8880192f0370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 [ 859.772004][ T1645] 2 locks held by syz-executor117/8421: [ 859.777612][ T1645] [ 859.779934][ T1645] ============================================= [ 859.779934][ T1645] [ 859.790084][ T1645] NMI backtrace for cpu 0 [ 859.794547][ T1645] CPU: 0 PID: 1645 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 [ 859.802524][ T1645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 859.812579][ T1645] Call Trace: [ 859.815867][ T1645] dump_stack+0x137/0x1be [ 859.820367][ T1645] ? nmi_cpu_backtrace+0x94/0x190 [ 859.825398][ T1645] ? hw_nmi_get_sample_period+0x30/0x60 [ 859.831005][ T1645] nmi_cpu_backtrace+0x16c/0x190 [ 859.835945][ T1645] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 859.842012][ T1645] nmi_trigger_cpumask_backtrace+0x191/0x2f0 [ 859.847988][ T1645] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 859.854073][ T1645] watchdog+0xce9/0xd30 [ 859.858306][ T1645] ? hungtask_pm_notify+0x50/0x50 [ 859.863332][ T1645] kthread+0x39a/0x3c0 [ 859.867398][ T1645] ? hungtask_pm_notify+0x50/0x50 [ 859.872419][ T1645] ? kthread_blkcg+0xd0/0xd0 [ 859.877015][ T1645] ret_from_fork+0x1f/0x30 [ 859.881662][ T1645] Sending NMI from CPU 0 to CPUs 1: [ 859.887232][ C1] NMI backtrace for cpu 1 [ 859.887240][ C1] CPU: 1 PID: 4854 Comm: systemd-journal Not tainted 5.11.0-syzkaller #0 [ 859.887245][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 859.887249][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0xa0 [ 859.887254][ C1] Code: c1 e0 03 48 83 c8 18 48 89 34 01 4c 89 44 f9 18 49 ff c2 4c 89 11 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 4c 8b 04 24 <65> 48 8b 14 25 80 ef 01 00 65 8b 05 b8 0a 8a 7e a9 00 01 ff 00 74 [ 859.887261][ C1] RSP: 0018:ffffc90000edfe18 EFLAGS: 00000246 [ 859.887268][ C1] RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff888012425340 [ 859.887273][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 859.887277][ C1] RBP: ffff888024ce2218 R08: ffffffff81cc95ad R09: fffff520001dbfc3 [ 859.887281][ C1] R10: fffff520001dbfc3 R11: 0000000000000000 R12: dffffc0000000000 [ 859.887285][ C1] R13: ffff888024ce2220 R14: 0000000000000015 R15: ffff888024ce21c0 [ 859.887289][ C1] FS: 00007f6e2f3518c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 859.887293][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 859.887297][ C1] CR2: 00007f6e2c71f018 CR3: 0000000024d92000 CR4: 00000000001506e0 [ 859.887300][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 859.887304][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 859.887308][ C1] Call Trace: [ 859.887310][ C1] __put_unused_fd+0x4d/0x1c0 [ 859.887313][ C1] put_unused_fd+0x58/0x70 [ 859.887316][ C1] do_sys_openat2+0xd2/0x380 [ 859.887318][ C1] __x64_sys_open+0x1af/0x1e0 [ 859.887321][ C1] do_syscall_64+0x2d/0x70 [ 859.887324][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 859.887327][ C1] RIP: 0033:0x7f6e2e8e0840 [ 859.887332][ C1] 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 [ 859.887338][ C1] RSP: 002b:00007ffff1215078 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 859.887345][ C1] RAX: ffffffffffffffda RBX: 00007ffff1215380 RCX: 00007f6e2e8e0840 [ 859.887349][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055e8e98e67a0 [ 859.887353][ C1] RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff [ 859.887357][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 859.887361][ C1] R13: 000055e8e98d9040 R14: 00007ffff1215340 R15: 000055e8e98e6840 [ 859.888944][ T1645] Kernel panic - not syncing: hung_task: blocked tasks [ 860.132653][ T1645] CPU: 0 PID: 1645 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 [ 860.140629][ T1645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 860.150678][ T1645] Call Trace: [ 860.153956][ T1645] dump_stack+0x137/0x1be [ 860.158287][ T1645] ? panic+0x1f3/0x800 [ 860.162437][ T1645] panic+0x291/0x800 [ 860.166332][ T1645] ? nmi_trigger_cpumask_backtrace+0x236/0x2f0 [ 860.172479][ T1645] ? nmi_trigger_cpumask_backtrace+0x29b/0x2f0 [ 860.178631][ T1645] ? nmi_trigger_cpumask_backtrace+0x236/0x2f0 [ 860.185561][ T1645] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2f0 [ 860.191710][ T1645] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 860.197779][ T1645] watchdog+0xd29/0xd30 [ 860.201943][ T1645] ? hungtask_pm_notify+0x50/0x50 [ 860.206967][ T1645] kthread+0x39a/0x3c0 [ 860.211032][ T1645] ? hungtask_pm_notify+0x50/0x50 [ 860.216053][ T1645] ? kthread_blkcg+0xd0/0xd0 [ 860.220641][ T1645] ret_from_fork+0x1f/0x30 [ 860.225865][ T1645] Kernel Offset: disabled [ 860.230191][ T1645] Rebooting in 86400 seconds..