Warning: Permanently added '10.128.15.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 608.719533][ T8475] IPVS: ftp: loaded support on port[0] = 21 [ 864.803854][ T1626] INFO: task kworker/1:2:4299 blocked for more than 143 seconds. [ 864.812037][ T1626] Not tainted 5.11.0-rc3-syzkaller #0 [ 864.820351][ T1626] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 864.830175][ T1626] task:kworker/1:2 state:D stack:28816 pid: 4299 ppid: 2 flags:0x00004000 [ 864.840548][ T1626] Workqueue: ipv6_addrconf addrconf_verify_work [ 864.849003][ T1626] Call Trace: [ 864.852346][ T1626] __schedule+0x90c/0x21a0 [ 864.859652][ T1626] ? io_schedule_timeout+0x140/0x140 [ 864.866211][ T1626] ? _raw_spin_unlock_irq+0x1f/0x40 [ 864.871476][ T1626] ? lockdep_hardirqs_on+0x79/0x100 [ 864.878247][ T1626] schedule+0xcf/0x270 [ 864.882362][ T1626] schedule_preempt_disabled+0xf/0x20 [ 864.889288][ T1626] __mutex_lock+0x81a/0x1110 [ 864.896225][ T1626] ? addrconf_verify_work+0xa/0x20 [ 864.901403][ T1626] ? mutex_lock_io_nested+0xf60/0xf60 [ 864.908456][ T1626] ? lock_release+0x710/0x710 [ 864.913295][ T1626] ? lock_downgrade+0x6d0/0x6d0 [ 864.919998][ T1626] addrconf_verify_work+0xa/0x20 [ 864.926103][ T1626] process_one_work+0x98d/0x15f0 [ 864.931288][ T1626] ? pwq_dec_nr_in_flight+0x320/0x320 [ 864.938226][ T1626] ? rwlock_bug.part.0+0x90/0x90 [ 864.943204][ T1626] ? _raw_spin_lock_irq+0x41/0x50 [ 864.949979][ T1626] worker_thread+0x64c/0x1120 [ 864.956405][ T1626] ? __kthread_parkme+0x13f/0x1e0 [ 864.961540][ T1626] ? process_one_work+0x15f0/0x15f0 [ 864.968333][ T1626] kthread+0x3b1/0x4a0 [ 864.972434][ T1626] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 864.979933][ T1626] ret_from_fork+0x1f/0x30 [ 864.986110][ T1626] [ 864.986110][ T1626] Showing all locks held in the system: [ 864.995001][ T1626] 1 lock held by khungtaskd/1626: [ 865.000079][ T1626] #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 865.011591][ T1626] 3 locks held by kworker/1:2/4299: [ 865.018684][ T1626] #0: ffff888147496938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 865.033318][ T1626] #1: ffffc9000754fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 865.044874][ T1626] #2: ffffffff8ca58668 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 865.055451][ T1626] 1 lock held by in:imklog/8170: [ 865.060503][ T1626] #0: ffff88801a5ceff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 865.073980][ T1626] 1 lock held by syz-executor380/8497: [ 865.079556][ T1626] [ 865.082508][ T1626] ============================================= [ 865.082508][ T1626] [ 865.093529][ T1626] NMI backtrace for cpu 0 [ 865.098069][ T1626] CPU: 0 PID: 1626 Comm: khungtaskd Not tainted 5.11.0-rc3-syzkaller #0 [ 865.106760][ T1626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.117042][ T1626] Call Trace: [ 865.120374][ T1626] dump_stack+0x107/0x163 [ 865.124945][ T1626] nmi_cpu_backtrace.cold+0x44/0xd7 [ 865.130362][ T1626] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.135724][ T1626] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 865.141997][ T1626] watchdog+0xd43/0xfa0 [ 865.146963][ T1626] ? reset_hung_task_detector+0x30/0x30 [ 865.152571][ T1626] kthread+0x3b1/0x4a0 [ 865.156685][ T1626] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 865.162783][ T1626] ret_from_fork+0x1f/0x30 [ 865.167920][ T1626] Sending NMI from CPU 0 to CPUs 1: [ 865.175860][ C1] NMI backtrace for cpu 1 [ 865.175877][ C1] CPU: 1 PID: 8497 Comm: syz-executor380 Not tainted 5.11.0-rc3-syzkaller #0 [ 865.175888][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.175898][ C1] RIP: 0010:lock_release+0x3d5/0x710 [ 865.175909][ C1] Code: 15 02 00 00 48 c7 c7 80 ab 4b 89 e8 05 a2 a0 07 b8 ff ff ff ff 65 0f c1 05 58 38 a9 7e 83 f8 01 0f 85 67 01 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 00 00 00 00 c7 [ 865.175929][ C1] RSP: 0018:ffffc9000161ebc8 EFLAGS: 00000246 [ 865.175943][ C1] RAX: 0000000000000001 RBX: 03607339c2aba47c RCX: ffffc9000161ec18 [ 865.175955][ C1] RDX: 1ffff11002e8a4a7 RSI: 0000000000000000 RDI: 0000000000000000 [ 865.175965][ C1] RBP: 1ffff920002c3d7b R08: 0000000000000000 R09: 0000000000000000 [ 865.175974][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 [ 865.175983][ C1] R13: 0000000000000002 R14: ffff888017452540 R15: ffff888017451bc0 [ 865.175992][ C1] FS: 0000000000ed9880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 865.176001][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 865.176009][ C1] CR2: 00007f543b1b1000 CR3: 000000001380e000 CR4: 00000000001506e0 [ 865.176018][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 865.176027][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 865.176035][ C1] Call Trace: [ 865.176040][ C1] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 865.176047][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 865.176053][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 865.176062][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 865.176069][ C1] __mutex_unlock_slowpath+0x81/0x610 [ 865.176075][ C1] ? wait_for_completion_io+0x260/0x260 [ 865.176082][ C1] ? __radix_tree_lookup+0x211/0x2a0 [ 865.176088][ C1] tcf_idr_check_alloc+0x29e/0x3b0 [ 865.176095][ C1] tcf_police_init+0x34f/0x1460 [ 865.176102][ C1] ? tcf_police_cleanup+0x60/0x60 [ 865.176109][ C1] ? find_held_lock+0x2d/0x110 [ 865.176115][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 865.176123][ C1] ? stack_trace_save+0x8c/0xc0 [ 865.176129][ C1] tcf_action_init_1+0x1a3/0x990 [ 865.176136][ C1] ? tcf_action_dump_old+0x80/0x80 [ 865.176143][ C1] ? ____sys_sendmsg+0x331/0x810 [ 865.176149][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 865.176156][ C1] ? __sys_sendmmsg+0x195/0x470 [ 865.176163][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 865.176170][ C1] ? do_syscall_64+0x2d/0x70 [ 865.176177][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.176184][ C1] ? find_held_lock+0x2d/0x110 [ 865.176191][ C1] tcf_exts_validate+0x138/0x420 [ 865.176198][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 865.176204][ C1] ? unpoison_range+0x3a/0x60 [ 865.176211][ C1] rsvp_change+0x291/0x2990 [ 865.176217][ C1] ? find_held_lock+0x2d/0x110 [ 865.176224][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 865.176231][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 865.176237][ C1] ? blackhole_dequeue+0x10/0x10 [ 865.176245][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.176252][ C1] tc_new_tfilter+0x1394/0x2120 [ 865.176259][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 865.176266][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.176273][ C1] ? lock_chain_count+0x20/0x20 [ 865.176280][ C1] ? kernel_text_address+0xbd/0xf0 [ 865.176286][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.176293][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 865.176300][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 865.176307][ C1] netlink_rcv_skb+0x153/0x420 [ 865.176318][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 865.176324][ C1] ? netlink_ack+0xaa0/0xaa0 [ 865.176329][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 865.176335][ C1] netlink_unicast+0x533/0x7d0 [ 865.176340][ C1] ? netlink_attachskb+0x870/0x870 [ 865.176344][ C1] ? _copy_from_iter_full+0x275/0x850 [ 865.176348][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.176352][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 865.176355][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 865.176359][ C1] ? __check_object_size+0x171/0x3f0 [ 865.176363][ C1] netlink_sendmsg+0x856/0xd90 [ 865.176366][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 865.176373][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.176377][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 865.176388][ C1] sock_sendmsg+0xcf/0x120 [ 865.176391][ C1] ____sys_sendmsg+0x331/0x810 [ 865.176395][ C1] ? kernel_sendmsg+0x50/0x50 [ 865.176398][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 865.176402][ C1] ? __lock_acquire+0x16c2/0x54f0 [ 865.176405][ C1] ___sys_sendmsg+0xf3/0x170 [ 865.176409][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 865.176412][ C1] ? find_held_lock+0x2d/0x110 [ 865.176418][ C1] ? __might_fault+0xd3/0x180 [ 865.176421][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 865.176425][ C1] __sys_sendmmsg+0x195/0x470 [ 865.176432][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 865.176436][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.176440][ C1] ? sockfd_lookup_light+0xc5/0x180 [ 865.176443][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 865.176447][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 865.176451][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.176455][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 865.176459][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 865.176462][ C1] do_syscall_64+0x2d/0x70 [ 865.176466][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.176470][ C1] RIP: 0033:0x4423c9 [ 865.176476][ C1] Code: e8 5c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 bb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 865.176492][ C1] RSP: 002b:00007ffc407ee9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 865.176501][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004423c9 [ 865.176506][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 865.176511][ C1] RBP: 00007ffc407eea00 R08: 0000000120080522 R09: 0000000120080522 [ 865.176516][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3710 [ 865.176526][ C1] R13: 00000000004032a0 R14: 0000000000000000 R15: 0000000000000000 [ 865.176534][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.726 msecs [ 865.178015][ T1626] Kernel panic - not syncing: hung_task: blocked tasks [ 865.811638][ T1626] CPU: 0 PID: 1626 Comm: khungtaskd Not tainted 5.11.0-rc3-syzkaller #0 [ 865.819991][ T1626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.830083][ T1626] Call Trace: [ 865.833385][ T1626] dump_stack+0x107/0x163 [ 865.837764][ T1626] panic+0x306/0x73d [ 865.841699][ T1626] ? __warn_printk+0xf3/0xf3 [ 865.846327][ T1626] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.851566][ T1626] ? preempt_schedule_thunk+0x16/0x18 [ 865.856973][ T1626] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 865.863163][ T1626] ? watchdog.cold+0x5/0x158 [ 865.867826][ T1626] watchdog.cold+0x16/0x158 [ 865.872362][ T1626] ? reset_hung_task_detector+0x30/0x30 [ 865.877940][ T1626] kthread+0x3b1/0x4a0 [ 865.882038][ T1626] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 865.887985][ T1626] ret_from_fork+0x1f/0x30 [ 865.893152][ T1626] Kernel Offset: disabled [ 865.897520][ T1626] Rebooting in 86400 seconds..