[ 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 '10.128.1.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 850.885860][ T6886] netlink: 4 bytes leftover after parsing attributes in process `syz-executor630'. [ 850.930682][ T6888] netlink: 4 bytes leftover after parsing attributes in process `syz-executor630'. [ 1005.335071][ T1166] INFO: task syz-executor630:6886 blocked for more than 143 seconds. [ 1005.343278][ T1166] Not tainted 5.9.0-rc1-syzkaller #0 [ 1005.353450][ T1166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1005.362949][ T1166] task:syz-executor630 state:D stack:25688 pid: 6886 ppid: 6879 flags:0x00004004 [ 1005.373041][ T1166] Call Trace: [ 1005.377176][ T1166] __schedule+0x8e5/0x21e0 [ 1005.381612][ T1166] ? io_schedule_timeout+0x140/0x140 [ 1005.388059][ T1166] schedule+0xd0/0x2a0 [ 1005.392137][ T1166] schedule_preempt_disabled+0xf/0x20 [ 1005.398729][ T1166] __mutex_lock+0x3e2/0x10e0 [ 1005.403388][ T1166] ? tcf_ife_init+0x11a4/0x16f0 [ 1005.409391][ T1166] ? mutex_lock_io_nested+0xf60/0xf60 [ 1005.414770][ T1166] ? lock_downgrade+0x770/0x830 [ 1005.421016][ T1166] tcf_ife_init+0x11a4/0x16f0 [ 1005.426447][ T1166] ? tcf_ife_dump+0xb90/0xb90 [ 1005.431119][ T1166] ? lock_acquire+0x1f1/0xad0 [ 1005.436945][ T1166] ? tc_lookup_action_n+0x1a/0xf0 [ 1005.441975][ T1166] ? find_held_lock+0x2d/0x110 [ 1005.447807][ T1166] ? lock_downgrade+0x830/0x830 [ 1005.452676][ T1166] tcf_action_init_1+0x6a5/0xac0 [ 1005.458717][ T1166] ? tcf_action_dump_old+0x80/0x80 [ 1005.463854][ T1166] tcf_action_init+0x249/0x380 [ 1005.469641][ T1166] ? tcf_action_init_1+0xac0/0xac0 [ 1005.474788][ T1166] tcf_action_add+0xd9/0x360 [ 1005.481388][ T1166] ? tca_action_gd+0xda0/0xda0 [ 1005.486814][ T1166] ? lock_acquire+0x1f1/0xad0 [ 1005.491523][ T1166] ? bpf_lsm_capable+0x5/0x10 [ 1005.497211][ T1166] ? __nla_parse+0x3d/0x4a [ 1005.501635][ T1166] tc_ctl_action+0x33a/0x439 [ 1005.507279][ T1166] ? tcf_action_add+0x360/0x360 [ 1005.512135][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 1005.518113][ T1166] ? tcf_action_add+0x360/0x360 [ 1005.523049][ T1166] rtnetlink_rcv_msg+0x44e/0xad0 [ 1005.529080][ T1166] ? rtnetlink_put_metrics+0x510/0x510 [ 1005.534542][ T1166] ? lock_acquire+0x1f1/0xad0 [ 1005.541740][ T1166] ? netlink_deliver_tap+0x146/0xb70 [ 1005.548626][ T1166] netlink_rcv_skb+0x15a/0x430 [ 1005.553394][ T1166] ? rtnetlink_put_metrics+0x510/0x510 [ 1005.559851][ T1166] ? netlink_ack+0xa10/0xa10 [ 1005.564445][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 1005.570381][ T1166] netlink_unicast+0x533/0x7d0 [ 1005.575880][ T1166] ? netlink_attachskb+0x810/0x810 [ 1005.580989][ T1166] ? _copy_from_iter_full+0x247/0x890 [ 1005.587402][ T1166] ? __phys_addr+0x9a/0x110 [ 1005.591902][ T1166] ? __phys_addr_symbol+0x2c/0x70 [ 1005.597954][ T1166] ? __check_object_size+0x171/0x3e4 [ 1005.603242][ T1166] netlink_sendmsg+0x856/0xd90 [ 1005.609998][ T1166] ? netlink_unicast+0x7d0/0x7d0 [ 1005.615652][ T1166] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 1005.620937][ T1166] ? netlink_unicast+0x7d0/0x7d0 [ 1005.626955][ T1166] sock_sendmsg+0xcf/0x120 [ 1005.631373][ T1166] ____sys_sendmsg+0x6e8/0x810 [ 1005.637201][ T1166] ? kernel_sendmsg+0x50/0x50 [ 1005.641926][ T1166] ? do_recvmmsg+0x6d0/0x6d0 [ 1005.647562][ T1166] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1005.653539][ T1166] ? lock_acquire+0x1f1/0xad0 [ 1005.659367][ T1166] ? do_huge_pmd_anonymous_page+0x120d/0x2230 [ 1005.666146][ T1166] ? find_held_lock+0x2d/0x110 [ 1005.670914][ T1166] ___sys_sendmsg+0xf3/0x170 [ 1005.676522][ T1166] ? sendmsg_copy_msghdr+0x160/0x160 [ 1005.681806][ T1166] ? __fget_files+0x272/0x400 [ 1005.687583][ T1166] ? lock_downgrade+0x830/0x830 [ 1005.692434][ T1166] ? do_huge_pmd_anonymous_page+0x8ef/0x2230 [ 1005.699557][ T1166] ? __fget_files+0x294/0x400 [ 1005.704240][ T1166] ? __fget_light+0xea/0x280 [ 1005.709818][ T1166] __sys_sendmsg+0xe5/0x1b0 [ 1005.714324][ T1166] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1005.720369][ T1166] ? trace_hardirqs_on+0x5f/0x220 [ 1005.726043][ T1166] ? lockdep_hardirqs_on+0x76/0xf0 [ 1005.731220][ T1166] do_syscall_64+0x2d/0x70 [ 1005.737532][ T1166] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1005.743422][ T1166] RIP: 0033:0x447439 [ 1005.748279][ T1166] Code: Bad RIP value. [ 1005.752340][ T1166] RSP: 002b:00007fad2fda5ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1005.762725][ T1166] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000447439 [ 1005.771353][ T1166] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 1005.779989][ T1166] RBP: 00000000006dcc20 R08: 0000000000000004 R09: 0000000000000000 [ 1005.788597][ T1166] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000006dcc2c [ 1005.797270][ T1166] R13: 00007fffcc470c3f R14: 00007fad2fda69c0 R15: 20c49ba5e353f7cf [ 1005.805932][ T1166] [ 1005.805932][ T1166] Showing all locks held in the system: [ 1005.813647][ T1166] 1 lock held by khungtaskd/1166: [ 1005.819731][ T1166] #0: ffffffff89bd6b40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 1005.831658][ T1166] 3 locks held by kworker/0:2/2765: [ 1005.837512][ T1166] #0: ffff8880994dd138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 1005.849140][ T1166] #1: ffffc900093ffda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 1005.860027][ T1166] #2: ffffffff8a7ea188 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 1005.871090][ T1166] 1 lock held by in:imklog/6614: [ 1005.876664][ T1166] #0: ffff8880a66006b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 1005.886467][ T1166] 1 lock held by syz-executor630/6886: [ 1005.891909][ T1166] #0: ffffffff8a7ea188 (rtnl_mutex){+.+.}-{3:3}, at: tcf_ife_init+0x11a4/0x16f0 [ 1005.902023][ T1166] 1 lock held by syz-executor630/6888: [ 1005.908126][ T1166] [ 1005.910444][ T1166] ============================================= [ 1005.910444][ T1166] [ 1005.919814][ T1166] NMI backtrace for cpu 1 [ 1005.924143][ T1166] CPU: 1 PID: 1166 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 1005.932371][ T1166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1005.942411][ T1166] Call Trace: [ 1005.945694][ T1166] dump_stack+0x18f/0x20d [ 1005.950015][ T1166] nmi_cpu_backtrace.cold+0x70/0xb1 [ 1005.955202][ T1166] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1005.960822][ T1166] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 1005.966788][ T1166] watchdog+0xd7d/0x1000 [ 1005.971018][ T1166] ? reset_hung_task_detector+0x30/0x30 [ 1005.976547][ T1166] kthread+0x3b5/0x4a0 [ 1005.980600][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1005.985706][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1005.990814][ T1166] ret_from_fork+0x1f/0x30 [ 1005.995370][ T1166] Sending NMI from CPU 1 to CPUs 0: [ 1006.001459][ C0] NMI backtrace for cpu 0 [ 1006.001465][ C0] CPU: 0 PID: 6888 Comm: syz-executor630 Not tainted 5.9.0-rc1-syzkaller #0 [ 1006.001471][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.001474][ C0] RIP: 0010:check_memory_region+0xde/0x180 [ 1006.001485][ C0] 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 [ 1006.001488][ C0] RSP: 0018:ffffc90001c76a38 EFLAGS: 00000046 [ 1006.001495][ C0] RAX: fffffbfff18bf953 RBX: fffffbfff18bf954 RCX: ffffffff8159e5bc [ 1006.001500][ C0] RDX: fffffbfff18bf954 RSI: 0000000000000008 RDI: ffffffff8c5fca98 [ 1006.001522][ C0] RBP: fffffbfff18bf953 R08: 0000000000000000 R09: ffffffff8c5fca9f [ 1006.001527][ C0] R10: fffffbfff18bf953 R11: 0000000000000001 R12: 0000000000000006 [ 1006.001532][ C0] R13: ffff888093204952 R14: ffff888093204930 R15: ffff888093204908 [ 1006.001537][ C0] FS: 00007fad2fd85700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 1006.001541][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1006.001546][ C0] CR2: 00007f80ddbe6ab4 CR3: 00000000930be000 CR4: 00000000001506f0 [ 1006.001551][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1006.001555][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1006.001557][ C0] Call Trace: [ 1006.001559][ C0] mark_lock+0xbc/0x1710 [ 1006.001562][ C0] ? mark_lock+0xbc/0x1710 [ 1006.001565][ C0] __lock_acquire+0x8cd/0x5640 [ 1006.001567][ C0] ? lockdep_hardirqs_on+0x76/0xf0 [ 1006.001571][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1006.001573][ C0] lock_acquire+0x1f1/0xad0 [ 1006.001576][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 1006.001579][ C0] ? lock_release+0x8e0/0x8e0 [ 1006.001582][ C0] ? preempt_schedule_thunk+0x16/0x18 [ 1006.001585][ C0] ? lock_is_held_type+0xbb/0xf0 [ 1006.001587][ C0] __mutex_lock+0x134/0x10e0 [ 1006.001590][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 1006.001593][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 1006.001596][ C0] ? mark_held_locks+0x9f/0xe0 [ 1006.001599][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 1006.001602][ C0] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 1006.001605][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 1006.001608][ C0] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 1006.001611][ C0] ? wait_for_completion+0x260/0x260 [ 1006.001614][ C0] tcf_idr_check_alloc+0x78/0x3b0 [ 1006.001617][ C0] tcf_ife_init+0x3b1/0x16f0 [ 1006.001619][ C0] ? tcf_ife_dump+0xb90/0xb90 [ 1006.001622][ C0] ? lock_acquire+0x1f1/0xad0 [ 1006.001625][ C0] ? tc_lookup_action_n+0x1a/0xf0 [ 1006.001628][ C0] ? find_held_lock+0x2d/0x110 [ 1006.001631][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 1006.001633][ C0] ? lock_downgrade+0x830/0x830 [ 1006.001636][ C0] tcf_action_init_1+0x6a5/0xac0 [ 1006.001639][ C0] ? tcf_action_dump_old+0x80/0x80 [ 1006.001642][ C0] tcf_action_init+0x249/0x380 [ 1006.001645][ C0] ? tcf_action_init_1+0xac0/0xac0 [ 1006.001647][ C0] tcf_action_add+0xd9/0x360 [ 1006.001650][ C0] ? tca_action_gd+0xda0/0xda0 [ 1006.001653][ C0] ? lock_acquire+0x1f1/0xad0 [ 1006.001655][ C0] ? bpf_lsm_capable+0x5/0x10 [ 1006.001658][ C0] ? __nla_parse+0x3d/0x4a [ 1006.001660][ C0] tc_ctl_action+0x33a/0x439 [ 1006.001663][ C0] ? tcf_action_add+0x360/0x360 [ 1006.001666][ C0] ? lock_is_held_type+0xbb/0xf0 [ 1006.001669][ C0] ? tcf_action_add+0x360/0x360 [ 1006.001671][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 1006.001674][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 1006.001677][ C0] ? lock_acquire+0x1f1/0xad0 [ 1006.001680][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 1006.001683][ C0] netlink_rcv_skb+0x15a/0x430 [ 1006.001686][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 1006.001688][ C0] ? netlink_ack+0xa10/0xa10 [ 1006.001691][ C0] ? lock_is_held_type+0xbb/0xf0 [ 1006.001694][ C0] netlink_unicast+0x533/0x7d0 [ 1006.001697][ C0] ? netlink_attachskb+0x810/0x810 [ 1006.001700][ C0] ? _copy_from_iter_full+0x247/0x890 [ 1006.001702][ C0] ? __phys_addr+0x9a/0x110 [ 1006.001705][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 1006.001708][ C0] ? __check_object_size+0x171/0x3e4 [ 1006.001711][ C0] netlink_sendmsg+0x856/0xd90 [ 1006.001714][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1006.001717][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 1006.001719][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1006.001722][ C0] sock_sendmsg+0xcf/0x120 [ 1006.001725][ C0] ____sys_sendmsg+0x6e8/0x810 [ 1006.001727][ C0] ? kernel_sendmsg+0x50/0x50 [ 1006.001730][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 1006.001733][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1006.001736][ C0] ? __lock_acquire+0xbb5/0x5640 [ 1006.001738][ C0] ___sys_sendmsg+0xf3/0x170 [ 1006.001741][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 1006.001744][ C0] ? __fget_files+0x272/0x400 [ 1006.001747][ C0] ? lock_downgrade+0x830/0x830 [ 1006.001750][ C0] ? percpu_counter_add_batch+0x126/0x180 [ 1006.001752][ C0] ? __fget_files+0x294/0x400 [ 1006.001755][ C0] ? __fget_light+0xea/0x280 [ 1006.001758][ C0] __sys_sendmsg+0xe5/0x1b0 [ 1006.001760][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1006.001763][ C0] ? __x64_sys_futex+0x382/0x4e0 [ 1006.001766][ C0] ? trace_hardirqs_on+0x5f/0x220 [ 1006.001769][ C0] ? lockdep_hardirqs_on+0x76/0xf0 [ 1006.001771][ C0] do_syscall_64+0x2d/0x70 [ 1006.001775][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1006.001777][ C0] RIP: 0033:0x447439 [ 1006.001786][ C0] Code: e8 dc bd 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 4b 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1006.001790][ C0] RSP: 002b:00007fad2fd84ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1006.001799][ C0] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000447439 [ 1006.001803][ C0] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004 [ 1006.001807][ C0] RBP: 00000000006dcc30 R08: 0000000000000003 R09: 0000000000000000 [ 1006.001811][ C0] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dcc3c [ 1006.001815][ C0] R13: 00007fffcc470c3f R14: 00007fad2fd859c0 R15: 20c49ba5e353f7cf [ 1006.015592][ T1166] Kernel panic - not syncing: hung_task: blocked tasks [ 1006.603858][ T1166] CPU: 1 PID: 1166 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 1006.612074][ T1166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.622110][ T1166] Call Trace: [ 1006.625514][ T1166] dump_stack+0x18f/0x20d [ 1006.629837][ T1166] panic+0x2e3/0x75c [ 1006.633727][ T1166] ? __warn_printk+0xf3/0xf3 [ 1006.638312][ T1166] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1006.643935][ T1166] ? preempt_schedule_thunk+0x16/0x18 [ 1006.649297][ T1166] ? watchdog.cold+0x5/0x16b [ 1006.653874][ T1166] ? watchdog+0xa82/0x1000 [ 1006.658281][ T1166] watchdog.cold+0x16/0x16b [ 1006.662776][ T1166] ? reset_hung_task_detector+0x30/0x30 [ 1006.668312][ T1166] kthread+0x3b5/0x4a0 [ 1006.672367][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1006.677466][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1006.682565][ T1166] ret_from_fork+0x1f/0x30 [ 1006.688326][ T1166] Kernel Offset: disabled [ 1006.692646][ T1166] Rebooting in 86400 seconds..