Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 511.496639][ T6877] IPVS: ftp: loaded support on port[0] = 21 executing program [ 511.536863][ T6898] netlink: 396 bytes leftover after parsing attributes in process `syz-executor045'. [ 511.546514][ T6898] netlink: 68 bytes leftover after parsing attributes in process `syz-executor045'. [ 511.562579][ T6899] netlink: 396 bytes leftover after parsing attributes in process `syz-executor045'. [ 511.572142][ T6899] netlink: 68 bytes leftover after parsing attributes in process `syz-executor045'. [ 780.024616][ T1175] INFO: task kworker/1:1:6869 blocked for more than 143 seconds. [ 780.032540][ T1175] Not tainted 5.9.0-rc6-syzkaller #0 [ 780.042611][ T1175] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 780.052198][ T1175] task:kworker/1:1 state:D stack:29856 pid: 6869 ppid: 2 flags:0x00004000 [ 780.062387][ T1175] Workqueue: ipv6_addrconf addrconf_verify_work [ 780.069475][ T1175] Call Trace: [ 780.072804][ T1175] __schedule+0xec9/0x2280 [ 780.078382][ T1175] ? io_schedule_timeout+0x140/0x140 [ 780.083779][ T1175] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 780.091013][ T1175] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.096994][ T1175] ? lockdep_hardirqs_on+0x53/0x100 [ 780.102199][ T1175] schedule+0xd0/0x2a0 [ 780.107404][ T1175] schedule_preempt_disabled+0xf/0x20 [ 780.112781][ T1175] __mutex_lock+0x3e2/0x10e0 [ 780.118471][ T1175] ? addrconf_verify_work+0xa/0x20 [ 780.123600][ T1175] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.130377][ T1175] ? lock_release+0x8f0/0x8f0 [ 780.135822][ T1175] ? lock_downgrade+0x830/0x830 [ 780.140679][ T1175] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.147022][ T1175] ? lock_is_held_type+0xbb/0xf0 [ 780.151972][ T1175] addrconf_verify_work+0xa/0x20 [ 780.158118][ T1175] process_one_work+0x94c/0x1670 [ 780.163079][ T1175] ? lock_release+0x8f0/0x8f0 [ 780.170134][ T1175] ? pwq_dec_nr_in_flight+0x320/0x320 [ 780.176373][ T1175] ? rwlock_bug.part.0+0x90/0x90 [ 780.181329][ T1175] ? lockdep_hardirqs_off+0x96/0xd0 [ 780.187747][ T1175] worker_thread+0x64c/0x1120 [ 780.192480][ T1175] ? __kthread_parkme+0x13f/0x1e0 [ 780.198754][ T1175] ? process_one_work+0x1670/0x1670 [ 780.203958][ T1175] kthread+0x3b5/0x4a0 [ 780.209446][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 780.215404][ T1175] ret_from_fork+0x1f/0x30 [ 780.219907][ T1175] [ 780.219907][ T1175] Showing all locks held in the system: [ 780.228847][ T1175] 1 lock held by khungtaskd/1175: [ 780.233865][ T1175] #0: ffffffff8a067f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 780.245670][ T1175] 1 lock held by in:imklog/6557: [ 780.250608][ T1175] #0: ffff8880a8c7bbb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 780.262055][ T1175] 3 locks held by kworker/1:1/6869: [ 780.268093][ T1175] #0: ffff88809a2e2138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 780.279778][ T1175] #1: ffffc90006177da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 780.291012][ T1175] #2: ffffffff8b14d548 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 780.302479][ T1175] 1 lock held by syz-executor045/6899: [ 780.308666][ T1175] [ 780.310988][ T1175] ============================================= [ 780.310988][ T1175] [ 780.320477][ T1175] NMI backtrace for cpu 0 [ 780.324911][ T1175] CPU: 0 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 780.333137][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.343351][ T1175] Call Trace: [ 780.346777][ T1175] dump_stack+0x198/0x1fd [ 780.351106][ T1175] nmi_cpu_backtrace.cold+0x70/0xb1 [ 780.356353][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 780.361983][ T1175] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 780.368008][ T1175] watchdog+0xd7d/0x1000 [ 780.372316][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 780.377855][ T1175] kthread+0x3b5/0x4a0 [ 780.381919][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 780.387028][ T1175] ret_from_fork+0x1f/0x30 [ 780.392050][ T1175] Sending NMI from CPU 0 to CPUs 1: [ 780.398053][ C1] NMI backtrace for cpu 1 [ 780.398065][ C1] CPU: 1 PID: 3903 Comm: systemd-journal Not tainted 5.9.0-rc6-syzkaller #0 [ 780.398071][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.398075][ C1] RIP: 0010:unwind_next_frame+0xda/0x1f90 [ 780.398087][ C1] Code: 81 c4 a0 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 4d 8d 67 48 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 <0f> 85 1e 16 00 00 49 8b 47 48 48 89 44 24 08 49 8d 47 38 48 89 c2 [ 780.398091][ C1] RSP: 0018:ffffc900011777e8 EFLAGS: 00000046 [ 780.398099][ C1] RAX: dffffc0000000000 RBX: 1ffff9200022ef05 RCX: ffffc900011779a0 [ 780.398104][ C1] RDX: 1ffff9200022ef2b RSI: 0000000000000000 RDI: ffffc90001177910 [ 780.398110][ C1] RBP: 0000000000000001 R08: ffffffff8bc4ec44 R09: 0000000000000001 [ 780.398115][ C1] R10: 000000000007601f R11: 0000000000000001 R12: ffffc90001177958 [ 780.398120][ C1] R13: fffff5200022ef23 R14: ffffc90001177948 R15: ffffc90001177910 [ 780.398126][ C1] FS: 00007fa0c3a988c0(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 780.398130][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 780.398135][ C1] CR2: 00007fa0c0e37010 CR3: 00000000935dc000 CR4: 00000000001506e0 [ 780.398141][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 780.398146][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 780.398148][ C1] Call Trace: [ 780.398152][ C1] ? __unwind_start+0x592/0x800 [ 780.398155][ C1] ? deref_stack_reg+0x150/0x150 [ 780.398159][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.398162][ C1] __unwind_start+0x517/0x800 [ 780.398166][ C1] ? profile_setup.cold+0xc1/0xc1 [ 780.398169][ C1] arch_stack_walk+0x5e/0xf0 [ 780.398172][ C1] ? arch_stack_walk+0x5e/0xf0 [ 780.398175][ C1] ? putname+0xe1/0x120 [ 780.398179][ C1] stack_trace_save+0x8c/0xc0 [ 780.398183][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 780.398186][ C1] kasan_save_stack+0x1b/0x40 [ 780.398190][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.398194][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.398197][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.398201][ C1] ? find_held_lock+0x2d/0x110 [ 780.398205][ C1] ? debug_check_no_obj_freed+0x20c/0x41c [ 780.398208][ C1] ? lock_downgrade+0x830/0x830 [ 780.398212][ C1] ? lock_downgrade+0x830/0x830 [ 780.398215][ C1] ? do_raw_spin_unlock+0x171/0x230 [ 780.398219][ C1] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 780.398223][ C1] ? debug_check_no_obj_freed+0x20c/0x41c [ 780.398226][ C1] kasan_set_track+0x1c/0x30 [ 780.398230][ C1] kasan_set_free_info+0x1b/0x30 [ 780.398233][ C1] __kasan_slab_free+0xd8/0x120 [ 780.398236][ C1] ? putname+0xe1/0x120 [ 780.398240][ C1] kmem_cache_free.part.0+0x74/0x1e0 [ 780.398243][ C1] putname+0xe1/0x120 [ 780.398246][ C1] filename_lookup+0x3b1/0x560 [ 780.398249][ C1] ? may_linkat+0x2b0/0x2b0 [ 780.398253][ C1] ? __check_object_size+0x171/0x3e4 [ 780.398256][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 780.398260][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 780.398264][ C1] ? bpf_lsm_cred_prepare+0x5/0x10 [ 780.398267][ C1] do_faccessat+0x129/0x820 [ 780.398270][ C1] ? stream_open+0x60/0x60 [ 780.398274][ C1] ? __secure_computing+0x104/0x360 [ 780.398276][ C1] do_syscall_64+0x2d/0x70 [ 780.398280][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.398283][ C1] RIP: 0033:0x7fa0c2d549c7 [ 780.398292][ C1] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 780.398296][ C1] RSP: 002b:00007fff49d9f268 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 780.398303][ C1] RAX: ffffffffffffffda RBX: 00007fff49da2180 RCX: 00007fa0c2d549c7 [ 780.398308][ C1] RDX: 00007fa0c37c5a00 RSI: 0000000000000000 RDI: 000055855ed779a3 [ 780.398312][ C1] RBP: 00007fff49d9f2a0 R08: 0000000000000000 R09: 0000000000000000 [ 780.398316][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 780.398321][ C1] R13: 0000000000000000 R14: 00007fff49da2180 R15: 00007fff49d9f790 [ 780.399960][ T1175] Kernel panic - not syncing: hung_task: blocked tasks [ 780.803558][ T1175] CPU: 0 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 780.812391][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.822434][ T1175] Call Trace: [ 780.825726][ T1175] dump_stack+0x198/0x1fd [ 780.830161][ T1175] panic+0x382/0x7fb [ 780.834054][ T1175] ? __warn_printk+0xf3/0xf3 [ 780.838646][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 780.844272][ T1175] ? preempt_schedule_thunk+0x16/0x18 [ 780.849641][ T1175] ? watchdog.cold+0x5/0x16b [ 780.854224][ T1175] ? watchdog+0xa82/0x1000 [ 780.858644][ T1175] watchdog.cold+0x16/0x16b [ 780.863145][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 780.868687][ T1175] kthread+0x3b5/0x4a0 [ 780.872749][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 780.877860][ T1175] ret_from_fork+0x1f/0x30 [ 780.883714][ T1175] Kernel Offset: disabled [ 780.888094][ T1175] Rebooting in 86400 seconds..