[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 490.094113][ T8505] IPVS: ftp: loaded support on port[0] = 21 [ 721.317147][ T1654] INFO: task kworker/u4:4:1096 blocked for more than 143 seconds. [ 721.325184][ T1654] Not tainted 5.10.0-syzkaller #0 [ 721.332539][ T1654] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.341945][ T1654] task:kworker/u4:4 state:D stack:23568 pid: 1096 ppid: 2 flags:0x00004000 [ 721.352042][ T1654] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 721.360254][ T1654] Call Trace: [ 721.363558][ T1654] __schedule+0x8eb/0x21b0 [ 721.369147][ T1654] ? io_schedule_timeout+0x140/0x140 [ 721.374481][ T1654] schedule+0xcf/0x270 [ 721.379786][ T1654] schedule_preempt_disabled+0xf/0x20 [ 721.385186][ T1654] __mutex_lock+0x81a/0x1110 [ 721.392164][ T1654] ? tcindex_partial_destroy_work+0x13/0x50 [ 721.398826][ T1654] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.404243][ T1654] ? lock_release+0x710/0x710 [ 721.410040][ T1654] tcindex_partial_destroy_work+0x13/0x50 [ 721.415796][ T1654] process_one_work+0x98d/0x1630 [ 721.422020][ T1654] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.428115][ T1654] ? rwlock_bug.part.0+0x90/0x90 [ 721.433118][ T1654] ? _raw_spin_lock_irq+0x41/0x50 [ 721.439423][ T1654] worker_thread+0x64c/0x1120 [ 721.444146][ T1654] ? __kthread_parkme+0x13f/0x1e0 [ 721.450284][ T1654] ? process_one_work+0x1630/0x1630 [ 721.455541][ T1654] kthread+0x3b1/0x4a0 [ 721.460749][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.466675][ T1654] ret_from_fork+0x1f/0x30 [ 721.472702][ T1654] INFO: task kworker/0:0:8497 blocked for more than 143 seconds. [ 721.481173][ T1654] Not tainted 5.10.0-syzkaller #0 [ 721.486739][ T1654] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.497550][ T1654] task:kworker/0:0 state:D stack:28944 pid: 8497 ppid: 2 flags:0x00004000 [ 721.506796][ T1654] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.514203][ T1654] Call Trace: [ 721.519412][ T1654] __schedule+0x8eb/0x21b0 [ 721.523868][ T1654] ? io_schedule_timeout+0x140/0x140 [ 721.530287][ T1654] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.535517][ T1654] ? lockdep_hardirqs_on+0x79/0x100 [ 721.541867][ T1654] schedule+0xcf/0x270 [ 721.545971][ T1654] schedule_preempt_disabled+0xf/0x20 [ 721.552495][ T1654] __mutex_lock+0x81a/0x1110 [ 721.557834][ T1654] ? addrconf_verify_work+0xa/0x20 [ 721.562988][ T1654] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.569538][ T1654] ? lock_release+0x710/0x710 [ 721.574247][ T1654] ? lock_downgrade+0x6d0/0x6d0 [ 721.580258][ T1654] addrconf_verify_work+0xa/0x20 [ 721.585496][ T1654] process_one_work+0x98d/0x1630 [ 721.591859][ T1654] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.597957][ T1654] ? rwlock_bug.part.0+0x90/0x90 [ 721.602925][ T1654] ? _raw_spin_lock_irq+0x41/0x50 [ 721.609100][ T1654] worker_thread+0x64c/0x1120 [ 721.613828][ T1654] ? __kthread_parkme+0x13f/0x1e0 [ 721.620237][ T1654] ? process_one_work+0x1630/0x1630 [ 721.625480][ T1654] kthread+0x3b1/0x4a0 [ 721.630683][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.636609][ T1654] ret_from_fork+0x1f/0x30 [ 721.642263][ T1654] [ 721.642263][ T1654] Showing all locks held in the system: [ 721.651945][ T1654] 3 locks held by kworker/u4:4/1096: [ 721.658398][ T1654] #0: ffff88814176e138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 [ 721.670676][ T1654] #1: ffffc90003f1fda8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 [ 721.682905][ T1654] #2: ffffffff8d0d32a8 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 721.693861][ T1654] 1 lock held by khungtaskd/1654: [ 721.699692][ T1654] #0: ffffffff8b78e1e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c [ 721.710633][ T1654] 1 lock held by in:imklog/8179: [ 721.715600][ T1654] #0: ffff888013241770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.726608][ T1654] 3 locks held by kworker/0:0/8497: [ 721.732601][ T1654] #0: ffff8880216e1538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 [ 721.744468][ T1654] #1: ffffc90001bbfda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 [ 721.755457][ T1654] #2: ffffffff8d0d32a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 721.765592][ T1654] 2 locks held by syz-executor834/8526: [ 721.771869][ T1654] [ 721.774211][ T1654] ============================================= [ 721.774211][ T1654] [ 721.785557][ T1654] NMI backtrace for cpu 1 [ 721.790104][ T1654] CPU: 1 PID: 1654 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0 [ 721.798097][ T1654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.808160][ T1654] Call Trace: [ 721.811451][ T1654] dump_stack+0x107/0x163 [ 721.815804][ T1654] nmi_cpu_backtrace.cold+0x3c/0xef [ 721.821023][ T1654] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.826244][ T1654] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.832246][ T1654] watchdog+0xe36/0x10b0 [ 721.836507][ T1654] ? reset_hung_task_detector+0x30/0x30 [ 721.842074][ T1654] kthread+0x3b1/0x4a0 [ 721.846223][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.852145][ T1654] ret_from_fork+0x1f/0x30 [ 721.856737][ T1654] Sending NMI from CPU 1 to CPUs 0: [ 721.863343][ C0] NMI backtrace for cpu 0 [ 721.863353][ C0] CPU: 0 PID: 8526 Comm: syz-executor834 Not tainted 5.10.0-syzkaller #0 [ 721.863363][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.863372][ C0] RIP: 0010:__lock_acquire+0x4f8/0x54b0 [ 721.863383][ C0] Code: 0f 84 9b 02 00 00 49 8d 7c 24 21 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 0f b6 14 11 48 89 f9 83 e1 07 38 ca 7f 08 <84> d2 0f 85 bb 10 00 00 41 0f b6 54 24 21 84 d2 0f 88 02 0c 00 00 [ 721.863399][ C0] RSP: 0018:ffffc900012fe868 EFLAGS: 00000097 [ 721.863413][ C0] RAX: ffffffff8f54f800 RBX: 0000000000000001 RCX: 0000000000000001 [ 721.863422][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88801e6d5a11 [ 721.863431][ C0] RBP: ffff88801e6d5040 R08: 0000000000000000 R09: ffffffff8f504867 [ 721.863439][ C0] R10: fffffbfff1ea090c R11: 0000000000000000 R12: ffff88801e6d59f0 [ 721.863448][ C0] R13: 0000000000000003 R14: ffff88801c478c68 R15: 000000000000063b [ 721.863457][ C0] FS: 00000000018af880(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 721.863466][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 721.863474][ C0] CR2: 00007fdf97f0e000 CR3: 0000000013725000 CR4: 00000000001506f0 [ 721.863483][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 721.863492][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 721.863500][ C0] Call Trace: [ 721.863505][ C0] ? __schedule+0x8f3/0x21b0 [ 721.863511][ C0] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 721.863518][ C0] lock_acquire+0x29d/0x750 [ 721.863524][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 721.863530][ C0] ? lock_release+0x710/0x710 [ 721.863536][ C0] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 721.863543][ C0] __mutex_lock+0x134/0x1110 [ 721.863549][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 721.863555][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 721.863561][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.863568][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 721.863575][ C0] ? wait_for_completion_io+0x260/0x260 [ 721.863581][ C0] ? __radix_tree_lookup+0x211/0x2a0 [ 721.863587][ C0] tcf_idr_check_alloc+0x78/0x3b0 [ 721.863594][ C0] tcf_police_init+0x1fd/0x12e0 [ 721.863600][ C0] ? tcf_police_search+0x40/0x40 [ 721.863606][ C0] ? find_held_lock+0x2d/0x110 [ 721.863612][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 721.863618][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 721.863625][ C0] tcf_action_init_1+0x1a3/0x990 [ 721.863631][ C0] ? tcf_action_dump_old+0x80/0x80 [ 721.863637][ C0] ? ____sys_sendmsg+0x331/0x810 [ 721.863643][ C0] ? ___sys_sendmsg+0xf3/0x170 [ 721.863649][ C0] ? __sys_sendmmsg+0x195/0x470 [ 721.863655][ C0] ? __x64_sys_sendmmsg+0x99/0x100 [ 721.863661][ C0] ? do_syscall_64+0x2d/0x70 [ 721.863668][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.863674][ C0] ? find_held_lock+0x2d/0x110 [ 721.863680][ C0] tcf_exts_validate+0x138/0x420 [ 721.863686][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 721.863693][ C0] ? kasan_unpoison_shadow+0x33/0x40 [ 721.863704][ C0] tcindex_set_parms+0x182/0x2420 [ 721.863711][ C0] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 721.863718][ C0] ? lock_chain_count+0x20/0x20 [ 721.863724][ C0] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 721.863731][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.863738][ C0] ? __nla_validate_parse+0x2d3/0x2ae0 [ 721.863745][ C0] ? nla_get_range_signed+0x520/0x520 [ 721.863751][ C0] ? find_held_lock+0x2d/0x110 [ 721.863757][ C0] ? tcindex_change+0x1d7/0x340 [ 721.863763][ C0] tcindex_change+0x232/0x340 [ 721.863769][ C0] ? tcindex_set_parms+0x2420/0x2420 [ 721.863776][ C0] tc_new_tfilter+0x13fb/0x21b0 [ 721.863782][ C0] ? tcindex_set_parms+0x2420/0x2420 [ 721.863788][ C0] ? tc_del_tfilter+0x15f0/0x15f0 [ 721.863794][ C0] ? lock_chain_count+0x20/0x20 [ 721.863800][ C0] ? kernel_text_address+0xbd/0xf0 [ 721.863807][ C0] ? tc_del_tfilter+0x15f0/0x15f0 [ 721.863813][ C0] rtnetlink_rcv_msg+0x8b6/0xb80 [ 721.863819][ C0] ? rtnl_fdb_dump+0xa00/0xa00 [ 721.863825][ C0] netlink_rcv_skb+0x153/0x420 [ 721.863831][ C0] ? rtnl_fdb_dump+0xa00/0xa00 [ 721.863837][ C0] ? netlink_ack+0xab0/0xab0 [ 721.863843][ C0] ? netlink_deliver_tap+0x2c4/0xc00 [ 721.863849][ C0] netlink_unicast+0x533/0x7d0 [ 721.863855][ C0] ? netlink_attachskb+0x870/0x870 [ 721.863862][ C0] ? _copy_from_iter_full+0x275/0x850 [ 721.863869][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.863876][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 721.863882][ C0] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 721.863889][ C0] ? __check_object_size+0x171/0x3f0 [ 721.863895][ C0] netlink_sendmsg+0x907/0xe40 [ 721.863901][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 721.863908][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.863915][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 721.863921][ C0] sock_sendmsg+0xcf/0x120 [ 721.863927][ C0] ____sys_sendmsg+0x331/0x810 [ 721.863933][ C0] ? kernel_sendmsg+0x50/0x50 [ 721.863938][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 721.863944][ C0] ? __lock_acquire+0x16c2/0x54b0 [ 721.863950][ C0] ___sys_sendmsg+0xf3/0x170 [ 721.863956][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 721.863963][ C0] ? find_held_lock+0x2d/0x110 [ 721.863969][ C0] ? __might_fault+0xd3/0x180 [ 721.863975][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 721.863981][ C0] __sys_sendmmsg+0x195/0x470 [ 721.863987][ C0] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 721.863993][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.864000][ C0] ? sockfd_lookup_light+0xc5/0x180 [ 721.864007][ C0] ? __sys_sendmsg+0x10c/0x1b0 [ 721.864013][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 721.864020][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.864028][ C0] __x64_sys_sendmmsg+0x99/0x100 [ 721.864035][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 721.864042][ C0] do_syscall_64+0x2d/0x70 [ 721.864048][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.864055][ C0] RIP: 0033:0x443669 [ 721.864066][ C0] 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 [ 721.864083][ C0] RSP: 002b:00007ffc8b3f4958 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 721.864099][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443669 [ 721.864109][ C0] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 721.864119][ C0] RBP: 00007ffc8b3f4960 R08: 0000000120080522 R09: 0000000120080522 [ 721.864128][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a4a30 [ 721.864138][ C0] R13: 0000000000404540 R14: 0000000000000000 R15: 0000000000000000 [ 721.864148][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.295 msecs [ 721.864437][ T1654] Kernel panic - not syncing: hung_task: blocked tasks [ 722.526831][ T1654] CPU: 1 PID: 1654 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0 [ 722.534932][ T1654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.544997][ T1654] Call Trace: [ 722.548285][ T1654] dump_stack+0x107/0x163 [ 722.552637][ T1654] panic+0x343/0x77f [ 722.556567][ T1654] ? __warn_printk+0xf3/0xf3 [ 722.561191][ T1654] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.566408][ T1654] ? preempt_schedule_thunk+0x16/0x18 [ 722.571794][ T1654] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 722.577966][ T1654] ? watchdog.cold+0xb8/0x23e [ 722.582669][ T1654] watchdog.cold+0xc9/0x23e [ 722.587191][ T1654] ? reset_hung_task_detector+0x30/0x30 [ 722.592755][ T1654] kthread+0x3b1/0x4a0 [ 722.596840][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.602756][ T1654] ret_from_fork+0x1f/0x30 [ 722.607732][ T1654] Kernel Offset: disabled [ 722.612062][ T1654] Rebooting in 86400 seconds..