[ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 446.587669][ T6887] IPVS: ftp: loaded support on port[0] = 21 [ 595.847211][ T1172] INFO: task kworker/u4:3:43 blocked for more than 143 seconds. [ 595.855059][ T1172] Not tainted 5.9.0-rc8-syzkaller #0 [ 595.863520][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.873230][ T1172] task:kworker/u4:3 state:D stack:24096 pid: 43 ppid: 2 flags:0x00004000 [ 595.883789][ T1172] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 595.892385][ T1172] Call Trace: [ 595.895728][ T1172] __schedule+0xec9/0x2280 [ 595.901534][ T1172] ? io_schedule_timeout+0x140/0x140 [ 595.906849][ T1172] schedule+0xd0/0x2a0 [ 595.912510][ T1172] schedule_preempt_disabled+0xf/0x20 [ 595.918812][ T1172] __mutex_lock+0x3e2/0x10e0 [ 595.923423][ T1172] ? tcindex_partial_destroy_work+0x13/0x50 [ 595.930830][ T1172] ? mutex_lock_io_nested+0xf60/0xf60 [ 595.936270][ T1172] ? process_one_work+0x85f/0x1670 [ 595.942867][ T1172] ? lock_release+0x8f0/0x8f0 [ 595.948471][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.953693][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.961454][ T1172] tcindex_partial_destroy_work+0x13/0x50 [ 595.968122][ T1172] process_one_work+0x94c/0x1670 [ 595.973101][ T1172] ? lock_release+0x8f0/0x8f0 [ 595.979190][ T1172] ? pwq_dec_nr_in_flight+0x320/0x320 [ 595.984597][ T1172] ? rwlock_bug.part.0+0x90/0x90 [ 595.991106][ T1172] ? lockdep_hardirqs_off+0x96/0xd0 [ 595.996435][ T1172] worker_thread+0x64c/0x1120 [ 596.002709][ T1172] ? __kthread_parkme+0x13f/0x1e0 [ 596.008660][ T1172] ? process_one_work+0x1670/0x1670 [ 596.013988][ T1172] kthread+0x3b5/0x4a0 [ 596.019446][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 596.025650][ T1172] ret_from_fork+0x1f/0x30 [ 596.031728][ T1172] [ 596.031728][ T1172] Showing all locks held in the system: [ 596.040507][ T1172] 3 locks held by kworker/u4:3/43: [ 596.045630][ T1172] #0: ffff8880a652d138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 596.059941][ T1172] #1: ffffc90000f37da8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 596.072400][ T1172] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 596.084431][ T1172] 1 lock held by khungtaskd/1172: [ 596.091690][ T1172] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 596.102689][ T1172] 3 locks held by kworker/0:2/2640: [ 596.108939][ T1172] #0: ffff888099634938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 596.121147][ T1172] #1: ffffc90008ff7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 596.132540][ T1172] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 596.143110][ T1172] 1 lock held by in:imklog/6574: [ 596.149139][ T1172] #0: ffff8880a820f0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 596.159480][ T1172] 2 locks held by syz-executor120/6908: [ 596.165152][ T1172] [ 596.168948][ T1172] ============================================= [ 596.168948][ T1172] [ 596.178382][ T1172] NMI backtrace for cpu 0 [ 596.182727][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 596.190982][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.201051][ T1172] Call Trace: [ 596.204459][ T1172] dump_stack+0x198/0x1fd [ 596.208809][ T1172] nmi_cpu_backtrace.cold+0x70/0xb1 [ 596.214022][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.219670][ T1172] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 596.225662][ T1172] watchdog+0xd7d/0x1000 [ 596.229917][ T1172] ? reset_hung_task_detector+0x30/0x30 [ 596.235485][ T1172] kthread+0x3b5/0x4a0 [ 596.239565][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 596.245207][ T1172] ret_from_fork+0x1f/0x30 [ 596.249914][ T1172] Sending NMI from CPU 0 to CPUs 1: [ 596.256464][ C1] NMI backtrace for cpu 1 [ 596.256471][ C1] CPU: 1 PID: 6908 Comm: syz-executor120 Not tainted 5.9.0-rc8-syzkaller #0 [ 596.256478][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.256482][ C1] RIP: 0010:__mutex_unlock_slowpath+0x2/0x610 [ 596.256494][ C1] Code: 44 24 18 e8 c0 26 7f f9 48 8b 44 24 18 e9 01 ff ff ff 48 8b 7c 24 10 e8 ac 26 7f f9 e9 c8 fe ff ff e8 52 21 fe ff cc cc 41 57 <49> 89 ff 48 83 c7 68 41 56 41 55 41 54 55 53 48 bb 00 00 00 00 00 [ 596.256499][ C1] RSP: 0018:ffffc90005886bf0 EFLAGS: 00000293 [ 596.256507][ C1] RAX: 0000000000000000 RBX: fffffffffffffff0 RCX: ffffffff86981572 [ 596.256513][ C1] RDX: ffff8880925f4440 RSI: ffffffff8698174e RDI: ffff8880a12f6e00 [ 596.256519][ C1] RBP: ffffc90005886cb0 R08: 0000000000000000 R09: ffff8880a12f6e07 [ 596.256524][ C1] R10: fffffffffffff000 R11: 0000000000000000 R12: ffffc90005886e38 [ 596.256530][ C1] R13: 0000000000000001 R14: ffff8880a12f6e00 R15: ffff8880a12f6e90 [ 596.256536][ C1] FS: 000000000131e880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 596.256540][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 596.256546][ C1] CR2: 0000000020000280 CR3: 00000000a15e6000 CR4: 00000000001506e0 [ 596.256551][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 596.256557][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 596.256560][ C1] Call Trace: [ 596.256564][ C1] tcf_idr_check_alloc+0x29e/0x3b0 [ 596.256568][ C1] tcf_police_init+0x347/0x13a0 [ 596.256572][ C1] ? tcf_police_cleanup+0x60/0x60 [ 596.256576][ C1] ? find_held_lock+0x2d/0x110 [ 596.256580][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 596.256584][ C1] tcf_action_init_1+0x1a3/0x990 [ 596.256588][ C1] ? tcf_action_dump_old+0x80/0x80 [ 596.256592][ C1] ? lock_acquire+0x1f3/0xaf0 [ 596.256596][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256600][ C1] ? find_held_lock+0x2d/0x110 [ 596.256604][ C1] ? fs_reclaim_release+0x90/0xd0 [ 596.256608][ C1] ? mark_lock+0x82/0x1660 [ 596.256612][ C1] ? mark_lock+0x82/0x1660 [ 596.256616][ C1] tcf_exts_validate+0x138/0x420 [ 596.256620][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 596.256624][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 596.256628][ C1] tcindex_set_parms+0x189/0x20d0 [ 596.256633][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.256637][ C1] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 596.256641][ C1] ? __nla_validate_parse+0x2d3/0x25c0 [ 596.256645][ C1] ? nla_get_range_signed+0x520/0x520 [ 596.256649][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256653][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256657][ C1] ? find_held_lock+0x2d/0x110 [ 596.256661][ C1] tcindex_change+0x203/0x2e0 [ 596.256665][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 596.256669][ C1] ? tcindex_lookup+0x390/0x390 [ 596.256674][ C1] ? lockdep_rtnl_is_held+0x22/0x30 [ 596.256677][ C1] tc_new_tfilter+0x1398/0x2130 [ 596.256682][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 596.256686][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 596.256690][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.256695][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.256699][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256703][ C1] ? security_capable+0x8f/0xc0 [ 596.256707][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256711][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 596.256715][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 596.256719][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 596.256723][ C1] ? lock_acquire+0x1f3/0xaf0 [ 596.256727][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 596.256731][ C1] netlink_rcv_skb+0x15a/0x430 [ 596.256735][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 596.256739][ C1] ? netlink_ack+0xa10/0xa10 [ 596.256743][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 596.256747][ C1] netlink_unicast+0x533/0x7d0 [ 596.256751][ C1] ? netlink_attachskb+0x810/0x810 [ 596.256755][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 596.256759][ C1] ? __check_object_size+0x171/0x3e4 [ 596.256763][ C1] netlink_sendmsg+0x856/0xd90 [ 596.256767][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 596.256771][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 596.256775][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 596.256779][ C1] sock_sendmsg+0xcf/0x120 [ 596.256783][ C1] ____sys_sendmsg+0x331/0x810 [ 596.256787][ C1] ? kernel_sendmsg+0x50/0x50 [ 596.256791][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 596.256795][ C1] ? __lock_acquire+0x164a/0x5780 [ 596.256799][ C1] ___sys_sendmsg+0xf3/0x170 [ 596.256803][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 596.256807][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.256811][ C1] ? fs_reclaim_release+0x90/0xd0 [ 596.256815][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256819][ C1] ? find_held_lock+0x2d/0x110 [ 596.256823][ C1] ? __might_fault+0x11f/0x1d0 [ 596.256827][ C1] ? lock_downgrade+0x830/0x830 [ 596.256831][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256835][ C1] __sys_sendmmsg+0x195/0x480 [ 596.256839][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 596.256843][ C1] ? find_held_lock+0x2d/0x110 [ 596.256847][ C1] ? __fd_install+0x1b4/0x600 [ 596.256851][ C1] ? alloc_file_pseudo+0x1/0x250 [ 596.256855][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256859][ C1] ? __fd_install+0x1e6/0x600 [ 596.256863][ C1] ? __sys_socket+0x16d/0x200 [ 596.256867][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.256871][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 596.256875][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 596.256880][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 596.256884][ C1] do_syscall_64+0x2d/0x70 [ 596.256888][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.256892][ C1] RIP: 0033:0x441889 [ 596.256903][ 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 [ 596.256907][ C1] RSP: 002b:00007ffce9c5f6f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 596.256917][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441889 [ 596.256923][ C1] RDX: 04924924924924b3 RSI: 0000000020000200 RDI: 0000000000000004 [ 596.256928][ C1] RBP: 00007ffce9c5f700 R08: 0000000120080522 R09: 0000000120080522 [ 596.256934][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2c90 [ 596.256939][ C1] R13: 0000000000402760 R14: 0000000000000000 R15: 0000000000000000 [ 596.256946][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 596.277089][ T1172] Kernel panic - not syncing: hung_task: blocked tasks [ 596.895456][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 596.903695][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.913777][ T1172] Call Trace: [ 596.917079][ T1172] dump_stack+0x198/0x1fd [ 596.921416][ T1172] panic+0x382/0x7fb [ 596.925311][ T1172] ? __warn_printk+0xf3/0xf3 [ 596.929907][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.935537][ T1172] ? preempt_schedule_thunk+0x16/0x18 [ 596.940919][ T1172] ? watchdog.cold+0x5/0x16b [ 596.945536][ T1172] ? watchdog+0xa82/0x1000 [ 596.949956][ T1172] watchdog.cold+0x16/0x16b [ 596.954464][ T1172] ? reset_hung_task_detector+0x30/0x30 [ 596.960013][ T1172] kthread+0x3b5/0x4a0 [ 596.964083][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 596.969202][ T1172] ret_from_fork+0x1f/0x30 [ 596.974967][ T1172] Kernel Offset: disabled [ 596.979567][ T1172] Rebooting in 86400 seconds..