[ OK ] Reached target Login Prompts. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 477.094126][ T8471] IPVS: ftp: loaded support on port[0] = 21 [ 637.620542][ T1651] INFO: task kworker/u4:3:152 blocked for more than 143 seconds. [ 637.628404][ T1651] Not tainted 5.10.0-rc1-syzkaller #0 [ 637.638305][ T1651] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.647959][ T1651] task:kworker/u4:3 state:D stack:24344 pid: 152 ppid: 2 flags:0x00004000 [ 637.658274][ T1651] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 637.666931][ T1651] Call Trace: [ 637.670297][ T1651] __schedule+0x893/0x2130 [ 637.675925][ T1651] ? io_schedule_timeout+0x140/0x140 [ 637.682132][ T1651] schedule+0xcf/0x270 [ 637.686219][ T1651] schedule_preempt_disabled+0xf/0x20 [ 637.693208][ T1651] __mutex_lock+0x3e2/0x10e0 [ 637.697821][ T1651] ? tcindex_partial_destroy_work+0x13/0x50 [ 637.705106][ T1651] ? mutex_lock_io_nested+0xf60/0xf60 [ 637.711505][ T1651] ? lock_release+0x710/0x710 [ 637.716212][ T1651] tcindex_partial_destroy_work+0x13/0x50 [ 637.723297][ T1651] process_one_work+0x933/0x15a0 [ 637.728260][ T1651] ? lock_release+0x710/0x710 [ 637.734156][ T1651] ? pwq_dec_nr_in_flight+0x320/0x320 [ 637.739605][ T1651] ? rwlock_bug.part.0+0x90/0x90 [ 637.745865][ T1651] ? _raw_spin_lock_irq+0x41/0x50 [ 637.751704][ T1651] worker_thread+0x64c/0x1120 [ 637.756412][ T1651] ? process_one_work+0x15a0/0x15a0 [ 637.764117][ T1651] kthread+0x3af/0x4a0 [ 637.768203][ T1651] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 637.775398][ T1651] ret_from_fork+0x1f/0x30 [ 637.779983][ T1651] [ 637.779983][ T1651] Showing all locks held in the system: [ 637.789246][ T1651] 3 locks held by kworker/u4:3/152: [ 637.796169][ T1651] #0: ffff888141632138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 637.808542][ T1651] #1: ffffc9000151fda8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 637.820990][ T1651] #2: ffffffff8c929a08 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 637.832040][ T1651] 1 lock held by khungtaskd/1651: [ 637.837075][ T1651] #0: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.848383][ T1651] 3 locks held by kworker/0:2/2998: [ 637.854577][ T1651] #0: ffff888146f34938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 637.866459][ T1651] #1: ffffc90001b0fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 637.877804][ T1651] #2: ffffffff8c929a08 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 637.888651][ T1651] 1 lock held by in:imklog/8169: [ 637.895746][ T1651] #0: ffff888017dc99f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.906097][ T1651] 2 locks held by syz-executor023/8492: [ 637.912489][ T1651] [ 637.914846][ T1651] ============================================= [ 637.914846][ T1651] [ 637.924597][ T1651] NMI backtrace for cpu 0 [ 637.928944][ T1651] CPU: 0 PID: 1651 Comm: khungtaskd Not tainted 5.10.0-rc1-syzkaller #0 [ 637.937260][ T1651] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.947310][ T1651] Call Trace: [ 637.950676][ T1651] dump_stack+0x107/0x163 [ 637.955031][ T1651] nmi_cpu_backtrace.cold+0x44/0xd7 [ 637.960295][ T1651] ? lapic_can_unplug_cpu+0x80/0x80 [ 637.965582][ T1651] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 637.971619][ T1651] watchdog+0xd43/0xfa0 [ 637.975784][ T1651] ? reset_hung_task_detector+0x30/0x30 [ 637.981330][ T1651] kthread+0x3af/0x4a0 [ 637.985399][ T1651] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 637.991299][ T1651] ret_from_fork+0x1f/0x30 [ 637.995841][ T1651] Sending NMI from CPU 0 to CPUs 1: [ 638.002625][ C1] NMI backtrace for cpu 1 [ 638.002632][ C1] CPU: 1 PID: 8492 Comm: syz-executor023 Not tainted 5.10.0-rc1-syzkaller #0 [ 638.002639][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 638.002643][ C1] RIP: 0010:check_memory_region+0xde/0x180 [ 638.002655][ C1] Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c [ 638.002659][ C1] RSP: 0018:ffffc9000178e840 EFLAGS: 00000046 [ 638.002668][ C1] RAX: fffffbfff1d75acf RBX: fffffbfff1d75ad0 RCX: ffffffff8155c4f7 [ 638.002674][ C1] RDX: fffffbfff1d75ad0 RSI: 0000000000000008 RDI: ffffffff8ebad678 [ 638.002679][ C1] RBP: fffffbfff1d75acf R08: 0000000000000000 R09: ffffffff8ebad67f [ 638.002685][ C1] R10: fffffbfff1d75acf R11: 0000000000000000 R12: ffff888020631a40 [ 638.002690][ C1] R13: 0000000000000004 R14: dffffc0000000000 R15: ffff888020632350 [ 638.002696][ C1] FS: 0000000001aeb880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 638.002700][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 638.002706][ C1] CR2: 00007f6ca52616c0 CR3: 0000000010cf4000 CR4: 00000000001506e0 [ 638.002712][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 638.002717][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 638.002720][ C1] Call Trace: [ 638.002724][ C1] __lock_acquire+0x6f7/0x5590 [ 638.002728][ C1] ? lockdep_hardirqs_on+0x85/0x110 [ 638.002732][ C1] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 638.002736][ C1] lock_acquire+0x1af/0x8b0 [ 638.002740][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 638.002744][ C1] ? lock_release+0x710/0x710 [ 638.002747][ C1] __mutex_lock+0x134/0x10e0 [ 638.002751][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 638.002756][ C1] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 638.002759][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 638.002763][ C1] ? lockdep_hardirqs_on+0x85/0x110 [ 638.002768][ C1] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 638.002772][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 638.002776][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 638.002780][ C1] ? __radix_tree_lookup+0x10e/0x290 [ 638.002784][ C1] ? wait_for_completion+0x260/0x260 [ 638.002788][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 638.002791][ C1] tcf_police_init+0x347/0x13a0 [ 638.002795][ C1] ? tcf_police_cleanup+0x60/0x60 [ 638.002799][ C1] ? find_held_lock+0x2d/0x110 [ 638.002803][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 638.002807][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 638.002811][ C1] tcf_action_init_1+0x1a3/0x990 [ 638.002815][ C1] ? tcf_action_dump_old+0x80/0x80 [ 638.002819][ C1] ? ____sys_sendmsg+0x331/0x810 [ 638.002823][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 638.002826][ C1] ? __sys_sendmmsg+0x195/0x470 [ 638.002830][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 638.002834][ C1] ? do_syscall_64+0x2d/0x70 [ 638.002838][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 638.002842][ C1] ? find_held_lock+0x2d/0x110 [ 638.002846][ C1] tcf_exts_validate+0x138/0x420 [ 638.002850][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 638.002853][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 638.002857][ C1] tcindex_set_parms+0x189/0x20d0 [ 638.002862][ C1] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 638.002866][ C1] ? __nla_validate_parse+0x2d3/0x2ae0 [ 638.002870][ C1] ? nla_get_range_signed+0x520/0x520 [ 638.002874][ C1] ? find_held_lock+0x2d/0x110 [ 638.002878][ C1] tcindex_change+0x212/0x320 [ 638.002881][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 638.002885][ C1] ? tcindex_lookup+0x390/0x390 [ 638.002889][ C1] ? lockdep_rtnl_is_held+0x22/0x30 [ 638.002893][ C1] tc_new_tfilter+0x1398/0x2130 [ 638.002897][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 638.002901][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 638.002905][ C1] ? lock_chain_count+0x20/0x20 [ 638.002908][ C1] ? kernel_text_address+0xbd/0xf0 [ 638.002912][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 638.002916][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 638.002920][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 638.002924][ C1] netlink_rcv_skb+0x153/0x420 [ 638.002928][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 638.002931][ C1] ? netlink_ack+0xaa0/0xaa0 [ 638.002935][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 638.002939][ C1] netlink_unicast+0x533/0x7d0 [ 638.002943][ C1] ? netlink_attachskb+0x810/0x810 [ 638.002947][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 638.002951][ C1] ? __check_object_size+0x171/0x3f0 [ 638.002954][ C1] netlink_sendmsg+0x856/0xd90 [ 638.002958][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 638.002962][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 638.002966][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 638.002969][ C1] sock_sendmsg+0xcf/0x120 [ 638.002973][ C1] ____sys_sendmsg+0x331/0x810 [ 638.002976][ C1] ? kernel_sendmsg+0x50/0x50 [ 638.002980][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 638.002984][ C1] ? __lock_acquire+0x16a0/0x5590 [ 638.002987][ C1] ___sys_sendmsg+0xf3/0x170 [ 638.002991][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 638.002995][ C1] ? find_held_lock+0x2d/0x110 [ 638.002999][ C1] ? __might_fault+0xd3/0x180 [ 638.003002][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 638.003006][ C1] __sys_sendmmsg+0x195/0x470 [ 638.003010][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 638.003014][ C1] ? find_held_lock+0x2d/0x110 [ 638.003017][ C1] ? alloc_file_pseudo+0x1/0x250 [ 638.003021][ C1] ? __fd_install+0x1e6/0x600 [ 638.003025][ C1] ? __sys_socket+0x16d/0x200 [ 638.003029][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 638.003033][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 638.003037][ C1] do_syscall_64+0x2d/0x70 [ 638.003041][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 638.003044][ C1] RIP: 0033:0x441879 [ 638.003055][ 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 [ 638.003060][ C1] RSP: 002b:00007ffc447f3748 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 638.003069][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441879 [ 638.003075][ C1] RDX: 04924924924924b3 RSI: 0000000020000200 RDI: 0000000000000004 [ 638.003080][ C1] RBP: 00007ffc447f3750 R08: 0000000120080522 R09: 0000000120080522 [ 638.003086][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2c70 [ 638.003091][ C1] R13: 0000000000402750 R14: 0000000000000000 R15: 0000000000000000 [ 638.003097][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.427 msecs [ 638.020311][ T1651] Kernel panic - not syncing: hung_task: blocked tasks [ 638.645814][ T1651] CPU: 0 PID: 1651 Comm: khungtaskd Not tainted 5.10.0-rc1-syzkaller #0 [ 638.654130][ T1651] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 638.664180][ T1651] Call Trace: [ 638.667473][ T1651] dump_stack+0x107/0x163 [ 638.671834][ T1651] panic+0x306/0x73d [ 638.675730][ T1651] ? __warn_printk+0xf3/0xf3 [ 638.680347][ T1651] ? lapic_can_unplug_cpu+0x80/0x80 [ 638.685544][ T1651] ? preempt_schedule_thunk+0x16/0x18 [ 638.690940][ T1651] ? watchdog.cold+0x5/0x158 [ 638.695529][ T1651] ? watchdog+0xa80/0xfa0 [ 638.699862][ T1651] watchdog.cold+0x16/0x158 [ 638.704372][ T1651] ? reset_hung_task_detector+0x30/0x30 [ 638.709918][ T1651] kthread+0x3af/0x4a0 [ 638.713992][ T1651] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 638.719888][ T1651] ret_from_fork+0x1f/0x30 [ 638.725449][ T1651] Kernel Offset: disabled [ 638.729911][ T1651] Rebooting in 86400 seconds..