Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 501.949644][ T8497] IPVS: ftp: loaded support on port[0] = 21 [ 721.470535][ T1654] INFO: task kworker/0:1:8489 blocked for more than 143 seconds. [ 721.478635][ T1654] Not tainted 5.11.0-rc4-syzkaller #0 [ 721.488613][ T1654] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.498375][ T1654] task:kworker/0:1 state:D stack:29448 pid: 8489 ppid: 2 flags:0x00004000 [ 721.508768][ T1654] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.516326][ T1654] Call Trace: [ 721.519691][ T1654] __schedule+0x90c/0x21a0 [ 721.525661][ T1654] ? io_schedule_timeout+0x140/0x140 [ 721.532337][ T1654] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.537655][ T1654] ? lockdep_hardirqs_on+0x79/0x100 [ 721.544623][ T1654] schedule+0xcf/0x270 [ 721.548738][ T1654] schedule_preempt_disabled+0xf/0x20 [ 721.555668][ T1654] __mutex_lock+0x81a/0x1110 [ 721.562444][ T1654] ? addrconf_verify_work+0xa/0x20 [ 721.567612][ T1654] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.574565][ T1654] ? lock_release+0x710/0x710 [ 721.579320][ T1654] ? lock_downgrade+0x6d0/0x6d0 [ 721.585729][ T1654] addrconf_verify_work+0xa/0x20 [ 721.591832][ T1654] process_one_work+0x98d/0x15f0 [ 721.596884][ T1654] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.603737][ T1654] ? rwlock_bug.part.0+0x90/0x90 [ 721.608771][ T1654] ? _raw_spin_lock_irq+0x41/0x50 [ 721.616576][ T1654] worker_thread+0x64c/0x1120 [ 721.622255][ T1654] ? __kthread_parkme+0x13f/0x1e0 [ 721.627417][ T1654] ? process_one_work+0x15f0/0x15f0 [ 721.634147][ T1654] kthread+0x3b1/0x4a0 [ 721.638253][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.646954][ T1654] ret_from_fork+0x1f/0x30 [ 721.652569][ T1654] [ 721.652569][ T1654] Showing all locks held in the system: [ 721.661401][ T1654] 1 lock held by khungtaskd/1654: [ 721.666475][ T1654] #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.678979][ T1654] 1 lock held by in:imklog/8225: [ 721.684935][ T1654] #0: ffff8880181ce870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.695411][ T1654] 3 locks held by kworker/0:1/8489: [ 721.701671][ T1654] #0: ffff888146f31538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 721.713943][ T1654] #1: ffffc90000fafda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 721.725453][ T1654] #2: ffffffff8ca58da8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 721.736097][ T1654] 2 locks held by syz-executor986/8519: [ 721.744118][ T1654] [ 721.746498][ T1654] ============================================= [ 721.746498][ T1654] [ 721.756969][ T1654] NMI backtrace for cpu 0 [ 721.761420][ T1654] CPU: 0 PID: 1654 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 721.769859][ T1654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.780283][ T1654] Call Trace: [ 721.783610][ T1654] dump_stack+0x107/0x163 [ 721.788067][ T1654] nmi_cpu_backtrace.cold+0x44/0xd7 [ 721.793301][ T1654] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.798623][ T1654] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.804693][ T1654] watchdog+0xd43/0xfa0 [ 721.808964][ T1654] ? reset_hung_task_detector+0x30/0x30 [ 721.814557][ T1654] kthread+0x3b1/0x4a0 [ 721.818653][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.824589][ T1654] ret_from_fork+0x1f/0x30 [ 721.829289][ T1654] Sending NMI from CPU 0 to CPUs 1: [ 721.836288][ C1] NMI backtrace for cpu 1 [ 721.836300][ C1] CPU: 1 PID: 8519 Comm: syz-executor986 Not tainted 5.11.0-rc4-syzkaller #0 [ 721.836310][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.836320][ C1] RIP: 0010:find_held_lock+0xbc/0x110 [ 721.836331][ C1] Code: 0f b6 5b 21 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 38 d0 7f 04 84 c0 75 4e 41 32 5c 24 21 83 e3 60 74 94 45 31 e4 <48> b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 02 4c [ 721.836347][ C1] RSP: 0018:ffffc9000160ebf8 EFLAGS: 00000002 [ 721.836361][ C1] RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffffc9000160ec80 [ 721.836370][ C1] RDX: 0000000000000002 RSI: ffff8880113c7c68 RDI: ffff88801f932570 [ 721.836379][ C1] RBP: 1ffff920002c1d88 R08: 0000000000000000 R09: 0000000000000000 [ 721.836388][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801f932570 [ 721.836397][ C1] R13: ffff8880113c7c68 R14: ffffc9000160ec80 R15: 0000000000000001 [ 721.836407][ C1] FS: 0000000001ef7880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 721.836416][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 721.836424][ C1] CR2: 00007f00aca2d000 CR3: 0000000011a8d000 CR4: 00000000001506e0 [ 721.836433][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 721.836442][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 721.836449][ C1] Call Trace: [ 721.836454][ C1] lock_release+0x1f2/0x710 [ 721.836460][ C1] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 721.836466][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 721.836473][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 721.836479][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.836486][ C1] __mutex_unlock_slowpath+0x81/0x610 [ 721.836492][ C1] ? __radix_tree_lookup+0xc3/0x2a0 [ 721.836499][ C1] ? wait_for_completion_io+0x260/0x260 [ 721.836505][ C1] ? __radix_tree_lookup+0x211/0x2a0 [ 721.836512][ C1] tcf_idr_check_alloc+0x29e/0x3b0 [ 721.836518][ C1] tcf_police_init+0x34f/0x1460 [ 721.836524][ C1] ? tcf_police_cleanup+0x60/0x60 [ 721.836530][ C1] ? find_held_lock+0x2d/0x110 [ 721.836544][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 721.836550][ C1] ? fs_reclaim_release+0x9c/0xe0 [ 721.836557][ C1] tcf_action_init_1+0x1a3/0x990 [ 721.836564][ C1] ? tcf_action_dump_old+0x80/0x80 [ 721.836571][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.836579][ C1] ? radix_tree_node_alloc.constprop.0+0x1b8/0x350 [ 721.836586][ C1] ? memset+0x20/0x40 [ 721.836593][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 721.836600][ C1] ? delete_node+0x216/0x8c0 [ 721.836607][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.836615][ C1] ? node_tag_clear+0xe9/0x240 [ 721.836621][ C1] tcf_exts_validate+0x138/0x420 [ 721.836628][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 721.836635][ C1] ? unpoison_range+0x3a/0x60 [ 721.836641][ C1] cls_bpf_change+0x60b/0x1b80 [ 721.836648][ C1] ? cls_bpf_bind_class+0x2c0/0x2c0 [ 721.836654][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 721.836661][ C1] ? blackhole_dequeue+0x10/0x10 [ 721.836668][ C1] tc_new_tfilter+0x1394/0x2120 [ 721.836674][ C1] ? cls_bpf_bind_class+0x2c0/0x2c0 [ 721.836681][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 721.836688][ C1] ? lock_chain_count+0x20/0x20 [ 721.836695][ C1] ? kernel_text_address+0xbd/0xf0 [ 721.836701][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 721.836708][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 721.836715][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 721.836722][ C1] netlink_rcv_skb+0x153/0x420 [ 721.836729][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 721.836736][ C1] ? netlink_ack+0xaa0/0xaa0 [ 721.836742][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 721.836749][ C1] netlink_unicast+0x533/0x7d0 [ 721.836756][ C1] ? netlink_attachskb+0x870/0x870 [ 721.836763][ C1] ? _copy_from_iter_full+0x275/0x850 [ 721.836770][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.836778][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 721.836784][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 721.836790][ C1] ? __check_object_size+0x171/0x3f0 [ 721.836796][ C1] netlink_sendmsg+0x856/0xd90 [ 721.836800][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 721.836804][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.836808][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 721.836811][ C1] sock_sendmsg+0xcf/0x120 [ 721.836814][ C1] ____sys_sendmsg+0x331/0x810 [ 721.836817][ C1] ? kernel_sendmsg+0x50/0x50 [ 721.836821][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 721.836824][ C1] ? __lock_acquire+0x16c2/0x54f0 [ 721.836827][ C1] ___sys_sendmsg+0xf3/0x170 [ 721.836831][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 721.836834][ C1] ? find_held_lock+0x2d/0x110 [ 721.836838][ C1] ? __might_fault+0xd3/0x180 [ 721.836841][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 721.836844][ C1] __sys_sendmmsg+0x195/0x470 [ 721.836848][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 721.836852][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.836855][ C1] ? sockfd_lookup_light+0xc5/0x180 [ 721.836859][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 721.836862][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 721.836866][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.836870][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 721.836874][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 721.836878][ C1] do_syscall_64+0x2d/0x70 [ 721.836881][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.836885][ C1] RIP: 0033:0x441759 [ 721.836891][ 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 [ 721.836900][ C1] RSP: 002b:00007ffea6f84a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 721.836909][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441759 [ 721.836915][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 721.836920][ C1] RBP: 00007ffea6f84a20 R08: 0000000100000000 R09: 0000000100000000 [ 721.836925][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000007a8eb [ 721.836930][ C1] R13: 0000000000402630 R14: 0000000000000000 R15: 0000000000000000 [ 721.836936][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.700 msecs [ 721.837258][ T1654] Kernel panic - not syncing: hung_task: blocked tasks [ 722.451211][ T1654] CPU: 0 PID: 1654 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 722.459654][ T1654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.469846][ T1654] Call Trace: [ 722.473151][ T1654] dump_stack+0x107/0x163 [ 722.477537][ T1654] panic+0x306/0x73d [ 722.481496][ T1654] ? __warn_printk+0xf3/0xf3 [ 722.486122][ T1654] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.491343][ T1654] ? preempt_schedule_thunk+0x16/0x18 [ 722.497434][ T1654] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 722.503730][ T1654] ? watchdog.cold+0x5/0x158 [ 722.508384][ T1654] watchdog.cold+0x16/0x158 [ 722.512934][ T1654] ? reset_hung_task_detector+0x30/0x30 [ 722.518521][ T1654] kthread+0x3b1/0x4a0 [ 722.522631][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.528561][ T1654] ret_from_fork+0x1f/0x30 [ 722.533237][ T1654] Kernel Offset: disabled [ 722.537578][ T1654] Rebooting in 86400 seconds..