[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.132' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 484.494439][ T8467] IPVS: ftp: loaded support on port[0] = 21 [ 721.896492][ T1645] INFO: task kworker/u4:4:155 blocked for more than 143 seconds. [ 721.904626][ T1645] Not tainted 5.10.0-syzkaller #0 [ 721.913594][ T1645] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.924095][ T1645] task:kworker/u4:4 state:D stack:24088 pid: 155 ppid: 2 flags:0x00004000 [ 721.934540][ T1645] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 721.943093][ T1645] Call Trace: [ 721.947222][ T1645] __schedule+0x90c/0x21a0 [ 721.951731][ T1645] ? io_schedule_timeout+0x140/0x140 [ 721.958447][ T1645] schedule+0xcf/0x270 [ 721.962562][ T1645] schedule_preempt_disabled+0xf/0x20 [ 721.969349][ T1645] __mutex_lock+0x81a/0x1110 [ 721.974028][ T1645] ? tcindex_partial_destroy_work+0x13/0x50 [ 721.982045][ T1645] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.988398][ T1645] ? lock_release+0x710/0x710 [ 721.993209][ T1645] tcindex_partial_destroy_work+0x13/0x50 [ 722.000454][ T1645] process_one_work+0x98d/0x15f0 [ 722.005485][ T1645] ? pwq_dec_nr_in_flight+0x320/0x320 [ 722.012158][ T1645] ? rwlock_bug.part.0+0x90/0x90 [ 722.018036][ T1645] ? _raw_spin_lock_irq+0x41/0x50 [ 722.023194][ T1645] worker_thread+0x64c/0x1120 [ 722.029288][ T1645] ? process_one_work+0x15f0/0x15f0 [ 722.034523][ T1645] kthread+0x3b1/0x4a0 [ 722.041422][ T1645] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.048327][ T1645] ret_from_fork+0x1f/0x30 [ 722.053044][ T1645] INFO: task kworker/0:1:8459 blocked for more than 143 seconds. [ 722.062313][ T1645] Not tainted 5.10.0-syzkaller #0 [ 722.069644][ T1645] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 722.079271][ T1645] task:kworker/0:1 state:D stack:29768 pid: 8459 ppid: 2 flags:0x00004000 [ 722.089556][ T1645] Workqueue: ipv6_addrconf addrconf_verify_work [ 722.095948][ T1645] Call Trace: [ 722.100550][ T1645] __schedule+0x90c/0x21a0 [ 722.105009][ T1645] ? io_schedule_timeout+0x140/0x140 [ 722.111669][ T1645] ? _raw_spin_unlock_irq+0x1f/0x40 [ 722.117824][ T1645] ? lockdep_hardirqs_on+0x79/0x100 [ 722.123126][ T1645] schedule+0xcf/0x270 [ 722.128568][ T1645] schedule_preempt_disabled+0xf/0x20 [ 722.133971][ T1645] __mutex_lock+0x81a/0x1110 [ 722.140064][ T1645] ? addrconf_verify_work+0xa/0x20 [ 722.145226][ T1645] ? mutex_lock_io_nested+0xf60/0xf60 [ 722.152856][ T1645] ? lock_release+0x710/0x710 [ 722.158631][ T1645] ? lock_downgrade+0x6d0/0x6d0 [ 722.163540][ T1645] addrconf_verify_work+0xa/0x20 [ 722.171403][ T1645] process_one_work+0x98d/0x15f0 [ 722.177353][ T1645] ? pwq_dec_nr_in_flight+0x320/0x320 [ 722.182761][ T1645] ? rwlock_bug.part.0+0x90/0x90 [ 722.189599][ T1645] ? _raw_spin_lock_irq+0x41/0x50 [ 722.194675][ T1645] worker_thread+0x64c/0x1120 [ 722.200709][ T1645] ? __kthread_parkme+0x13f/0x1e0 [ 722.205766][ T1645] ? process_one_work+0x15f0/0x15f0 [ 722.212502][ T1645] kthread+0x3b1/0x4a0 [ 722.217454][ T1645] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.223385][ T1645] ret_from_fork+0x1f/0x30 [ 722.229156][ T1645] [ 722.229156][ T1645] Showing all locks held in the system: [ 722.237841][ T1645] 3 locks held by kworker/u4:4/155: [ 722.243060][ T1645] #0: ffff888014f7d138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 722.256086][ T1645] #1: ffffc900011afda8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 722.268558][ T1645] #2: ffffffff8c93aea8 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 722.279719][ T1645] 1 lock held by khungtaskd/1645: [ 722.284763][ T1645] #0: ffffffff8b35efa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 722.296047][ T1645] 1 lock held by in:imklog/8162: [ 722.303071][ T1645] #0: ffff888020095270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 722.313286][ T1645] 3 locks held by kworker/0:1/8459: [ 722.319429][ T1645] #0: ffff8881477a0d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 722.331357][ T1645] #1: ffffc9000173fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 722.342722][ T1645] #2: ffffffff8c93aea8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 722.353552][ T1645] 2 locks held by syz-executor194/8489: [ 722.359973][ T1645] [ 722.362311][ T1645] ============================================= [ 722.362311][ T1645] [ 722.372618][ T1645] NMI backtrace for cpu 0 [ 722.377174][ T1645] CPU: 0 PID: 1645 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0 [ 722.385190][ T1645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.395257][ T1645] Call Trace: [ 722.398544][ T1645] dump_stack+0x107/0x163 [ 722.402930][ T1645] nmi_cpu_backtrace.cold+0x44/0xd7 [ 722.408141][ T1645] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.413498][ T1645] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 722.419590][ T1645] watchdog+0xd43/0xfa0 [ 722.423815][ T1645] ? reset_hung_task_detector+0x30/0x30 [ 722.429381][ T1645] kthread+0x3b1/0x4a0 [ 722.433467][ T1645] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.439382][ T1645] ret_from_fork+0x1f/0x30 [ 722.443961][ T1645] Sending NMI from CPU 0 to CPUs 1: [ 722.450811][ C1] NMI backtrace for cpu 1 [ 722.450822][ C1] CPU: 1 PID: 8489 Comm: syz-executor194 Not tainted 5.10.0-syzkaller #0 [ 722.450832][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.450841][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x5c/0x60 [ 722.450860][ C1] Code: 82 a8 14 00 00 83 f8 02 75 20 48 8b 8a b0 14 00 00 8b 92 ac 14 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 0f 1f 00 41 55 41 54 49 89 fc 55 48 bd eb 83 b5 80 46 86 c8 61 [ 722.450876][ C1] RSP: 0018:ffffc900013debf8 EFLAGS: 00000293 [ 722.450890][ C1] RAX: 0000000000000000 RBX: fffffffffffffff0 RCX: 0000000000000000 [ 722.450899][ C1] RDX: ffff8880200d0000 RSI: ffffffff870fb4d6 RDI: 0000000000000003 [ 722.450907][ C1] RBP: ffffc900013decb0 R08: fffffffffffff000 R09: 0000000000000000 [ 722.450916][ C1] R10: ffffffff870fb302 R11: 0000000000000000 R12: ffffc900013dee38 [ 722.450925][ C1] R13: 0000000000000001 R14: ffff88801333fa00 R15: ffff88801333fa90 [ 722.450934][ C1] FS: 0000000000d9d880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 722.450943][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 722.450951][ C1] CR2: 00007f69826c3018 CR3: 0000000023696000 CR4: 00000000001506e0 [ 722.450960][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 722.450969][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 722.450976][ C1] Call Trace: [ 722.450981][ C1] tcf_idr_check_alloc+0x296/0x3b0 [ 722.450987][ C1] tcf_police_init+0x347/0x13a0 [ 722.450993][ C1] ? tcf_police_cleanup+0x60/0x60 [ 722.450998][ C1] ? find_held_lock+0x2d/0x110 [ 722.451004][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 722.451010][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 722.451017][ C1] tcf_action_init_1+0x1a3/0x990 [ 722.451023][ C1] ? tcf_action_dump_old+0x80/0x80 [ 722.451029][ C1] ? ____sys_sendmsg+0x331/0x810 [ 722.451035][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 722.451041][ C1] ? __sys_sendmmsg+0x195/0x470 [ 722.451046][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 722.451052][ C1] ? do_syscall_64+0x2d/0x70 [ 722.451058][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 722.451065][ C1] ? find_held_lock+0x2d/0x110 [ 722.451071][ C1] tcf_exts_validate+0x138/0x420 [ 722.451077][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 722.451083][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 722.451089][ C1] tcindex_set_parms+0x189/0x20d0 [ 722.451095][ C1] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 722.451102][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.451109][ C1] ? __nla_validate_parse+0x2d3/0x2ae0 [ 722.451115][ C1] ? nla_get_range_signed+0x520/0x520 [ 722.451122][ C1] ? find_held_lock+0x2d/0x110 [ 722.451127][ C1] ? tcindex_change+0x1b7/0x320 [ 722.451133][ C1] tcindex_change+0x212/0x320 [ 722.451139][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 722.451145][ C1] ? tcindex_lookup+0x390/0x390 [ 722.451152][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.451159][ C1] ? __sanitizer_cov_trace_cmp2+0x22/0x80 [ 722.451165][ C1] tc_new_tfilter+0x1394/0x2120 [ 722.451171][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 722.451177][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 722.451183][ C1] ? kernel_text_address+0xbd/0xf0 [ 722.451189][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 722.451195][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 722.451201][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 722.451207][ C1] netlink_rcv_skb+0x153/0x420 [ 722.451213][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 722.451219][ C1] ? netlink_ack+0xaa0/0xaa0 [ 722.451225][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 722.451231][ C1] netlink_unicast+0x533/0x7d0 [ 722.451237][ C1] ? netlink_attachskb+0x870/0x870 [ 722.451243][ C1] ? _copy_from_iter_full+0x275/0x850 [ 722.451249][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.451257][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 722.451263][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.451270][ C1] ? __check_object_size+0x171/0x3f0 [ 722.451277][ C1] netlink_sendmsg+0x856/0xd90 [ 722.451283][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.451290][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.451297][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.451304][ C1] sock_sendmsg+0xcf/0x120 [ 722.451310][ C1] ____sys_sendmsg+0x331/0x810 [ 722.451316][ C1] ? kernel_sendmsg+0x50/0x50 [ 722.451322][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 722.451328][ C1] ? __lock_acquire+0x16b7/0x5500 [ 722.451335][ C1] ___sys_sendmsg+0xf3/0x170 [ 722.451341][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.451348][ C1] ? find_held_lock+0x2d/0x110 [ 722.451354][ C1] ? __might_fault+0xd3/0x180 [ 722.451360][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 722.451366][ C1] __sys_sendmmsg+0x195/0x470 [ 722.451372][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 722.451379][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.451387][ C1] ? sockfd_lookup_light+0xc5/0x180 [ 722.451393][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 722.451403][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 722.451410][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.451418][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 722.451424][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 722.451431][ C1] do_syscall_64+0x2d/0x70 [ 722.451438][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 722.451444][ C1] RIP: 0033:0x441709 [ 722.451455][ 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 [ 722.451472][ C1] RSP: 002b:00007ffc7d101d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 722.451487][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441709 [ 722.451496][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 722.451503][ C1] RBP: 00007ffc7d101d80 R08: 0000000120080522 R09: 0000000120080522 [ 722.451508][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2a50 [ 722.451513][ C1] R13: 00000000004025e0 R14: 0000000000000000 R15: 0000000000000000 [ 722.451519][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.507 msecs [ 722.453346][ T1645] Kernel panic - not syncing: hung_task: blocked tasks [ 723.051979][ T1645] CPU: 0 PID: 1645 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0 [ 723.059971][ T1645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.070034][ T1645] Call Trace: [ 723.073410][ T1645] dump_stack+0x107/0x163 [ 723.077761][ T1645] panic+0x306/0x73d [ 723.081934][ T1645] ? __warn_printk+0xf3/0xf3 [ 723.086558][ T1645] ? lapic_can_unplug_cpu+0x80/0x80 [ 723.091861][ T1645] ? preempt_schedule_thunk+0x16/0x18 [ 723.097250][ T1645] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 723.103439][ T1645] ? watchdog.cold+0x5/0x158 [ 723.108091][ T1645] watchdog.cold+0x16/0x158 [ 723.112614][ T1645] ? reset_hung_task_detector+0x30/0x30 [ 723.118179][ T1645] kthread+0x3b1/0x4a0 [ 723.122271][ T1645] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 723.128191][ T1645] ret_from_fork+0x1f/0x30 [ 723.133410][ T1645] Kernel Offset: disabled [ 723.137740][ T1645] Rebooting in 86400 seconds..