[ 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 '10.128.10.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 457.103515][ T6881] netlink: 32 bytes leftover after parsing attributes in process `syz-executor468'. [ 616.196938][ T1171] INFO: task syz-executor468:6881 blocked for more than 143 seconds. [ 616.205143][ T1171] Not tainted 5.9.0-rc8-syzkaller #0 [ 616.214385][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.223814][ T1171] task:syz-executor468 state:D stack:25816 pid: 6881 ppid: 6879 flags:0x00004004 [ 616.233832][ T1171] Call Trace: [ 616.238011][ T1171] __schedule+0xec9/0x2280 [ 616.242447][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.250006][ T1171] schedule+0xd0/0x2a0 [ 616.254084][ T1171] schedule_preempt_disabled+0xf/0x20 [ 616.260625][ T1171] __mutex_lock+0x3e2/0x10e0 [ 616.265265][ T1171] ? tcf_action_init_1+0x747/0x990 [ 616.271495][ T1171] ? mutex_lock_io_nested+0xf60/0xf60 [ 616.277626][ T1171] ? lock_downgrade+0x830/0x830 [ 616.282518][ T1171] ? generic_xdp_install+0x700/0x700 [ 616.288986][ T1171] tcf_action_init_1+0x747/0x990 [ 616.293936][ T1171] ? tcf_action_dump_old+0x80/0x80 [ 616.300205][ T1171] ? find_held_lock+0x2d/0x110 [ 616.305004][ T1171] tcf_action_init+0x265/0x4b0 [ 616.310895][ T1171] ? tcf_action_init_1+0x990/0x990 [ 616.316061][ T1171] tcf_action_add+0xd9/0x360 [ 616.321847][ T1171] ? tca_action_gd+0xe20/0xe20 [ 616.326625][ T1171] ? lock_acquire+0x1f3/0xaf0 [ 616.332607][ T1171] ? bpf_lsm_capable+0x5/0x10 [ 616.338082][ T1171] ? __nla_parse+0x3d/0x4a [ 616.342516][ T1171] tc_ctl_action+0x33a/0x439 [ 616.348308][ T1171] ? tcf_action_add+0x360/0x360 [ 616.353177][ T1171] ? lock_is_held_type+0xbb/0xf0 [ 616.359258][ T1171] ? tcf_action_add+0x360/0x360 [ 616.364166][ T1171] rtnetlink_rcv_msg+0x44e/0xad0 [ 616.370223][ T1171] ? rtnetlink_put_metrics+0x510/0x510 [ 616.375690][ T1171] ? lock_acquire+0x1f3/0xaf0 [ 616.382633][ T1171] ? netlink_deliver_tap+0x146/0xb70 [ 616.388667][ T1171] netlink_rcv_skb+0x15a/0x430 [ 616.393436][ T1171] ? rtnetlink_put_metrics+0x510/0x510 [ 616.400085][ T1171] ? netlink_ack+0xa10/0xa10 [ 616.404692][ T1171] ? __kmalloc_node_track_caller+0x38/0x60 [ 616.411597][ T1171] netlink_unicast+0x533/0x7d0 [ 616.416374][ T1171] ? netlink_attachskb+0x810/0x810 [ 616.422602][ T1171] ? __phys_addr_symbol+0x2c/0x70 [ 616.429971][ T1171] ? __check_object_size+0x171/0x3e4 [ 616.435525][ T1171] netlink_sendmsg+0x856/0xd90 [ 616.441452][ T1171] ? netlink_unicast+0x7d0/0x7d0 [ 616.446408][ T1171] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 616.452895][ T1171] ? netlink_unicast+0x7d0/0x7d0 [ 616.458776][ T1171] sock_sendmsg+0xcf/0x120 [ 616.463200][ T1171] ____sys_sendmsg+0x6e8/0x810 [ 616.469255][ T1171] ? kernel_sendmsg+0x50/0x50 [ 616.473933][ T1171] ? do_recvmmsg+0x6d0/0x6d0 [ 616.479765][ T1171] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.485747][ T1171] ? lock_is_held_type+0xbb/0xf0 [ 616.491756][ T1171] ? find_held_lock+0x2d/0x110 [ 616.496528][ T1171] ___sys_sendmsg+0xf3/0x170 [ 616.502275][ T1171] ? sendmsg_copy_msghdr+0x160/0x160 [ 616.509376][ T1171] ? __fget_files+0x272/0x400 [ 616.514064][ T1171] ? lock_downgrade+0x830/0x830 [ 616.520162][ T1171] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 616.526159][ T1171] ? __fget_files+0x294/0x400 [ 616.531921][ T1171] ? __fget_light+0xea/0x280 [ 616.536529][ T1171] __sys_sendmsg+0xe5/0x1b0 [ 616.542297][ T1171] ? __sys_sendmsg_sock+0xb0/0xb0 [ 616.548032][ T1171] ? check_preemption_disabled+0x50/0x130 [ 616.553755][ T1171] ? syscall_enter_from_user_mode+0x1d/0x60 [ 616.560776][ T1171] do_syscall_64+0x2d/0x70 [ 616.565194][ T1171] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.572189][ T1171] RIP: 0033:0x446b59 [ 616.576075][ T1171] Code: Bad RIP value. [ 616.581310][ T1171] RSP: 002b:00007ff2b82f8d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 616.590414][ T1171] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446b59 [ 616.599112][ T1171] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 [ 616.607783][ T1171] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 616.615753][ T1171] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 616.624865][ T1171] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 616.633599][ T1171] [ 616.633599][ T1171] Showing all locks held in the system: [ 616.643241][ T1171] 1 lock held by khungtaskd/1171: [ 616.649007][ T1171] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.659572][ T1171] 3 locks held by kworker/0:2/2939: [ 616.664761][ T1171] #0: ffff888214c91138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 616.679481][ T1171] #1: ffffc90000fa7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 616.690432][ T1171] #2: ffffffff8b150988 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 616.700616][ T1171] 1 lock held by in:imklog/6553: [ 616.705547][ T1171] #0: ffff8880a936daf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.715814][ T1171] 1 lock held by syz-executor468/6881: [ 616.721961][ T1171] #0: ffffffff8b150988 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x747/0x990 [ 616.732394][ T1171] 1 lock held by syz-executor468/6883: [ 616.738597][ T1171] [ 616.740923][ T1171] ============================================= [ 616.740923][ T1171] [ 616.750681][ T1171] NMI backtrace for cpu 0 [ 616.755015][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 616.763247][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.773286][ T1171] Call Trace: [ 616.776622][ T1171] dump_stack+0x198/0x1fd [ 616.780953][ T1171] nmi_cpu_backtrace.cold+0x70/0xb1 [ 616.786146][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.791775][ T1171] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.797762][ T1171] watchdog+0xd7d/0x1000 [ 616.802010][ T1171] ? reset_hung_task_detector+0x30/0x30 [ 616.807554][ T1171] kthread+0x3b5/0x4a0 [ 616.811621][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.816735][ T1171] ret_from_fork+0x1f/0x30 [ 616.821284][ T1171] Sending NMI from CPU 0 to CPUs 1: [ 616.827367][ C1] NMI backtrace for cpu 1 [ 616.827373][ C1] CPU: 1 PID: 6883 Comm: syz-executor468 Not tainted 5.9.0-rc8-syzkaller #0 [ 616.827378][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.827382][ C1] RIP: 0010:check_memory_region+0x17/0x180 [ 616.827391][ C1] Code: 0f 1f 00 48 89 f2 be f8 00 00 00 e9 93 ed 24 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 <0f> 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 [ 616.827395][ C1] RSP: 0018:ffffc90005586c88 EFLAGS: 00000296 [ 616.827402][ C1] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff815c09ee [ 616.827407][ C1] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8b599748 [ 616.827411][ C1] RBP: ffff888214c10c68 R08: 0000000000000000 R09: ffffffff8b599750 [ 616.827416][ C1] R10: ffffed1042982180 R11: 0000000000000000 R12: 0000000000000000 [ 616.827420][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 616.827425][ C1] FS: 00007ff2b82d8700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 616.827429][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.827434][ C1] CR2: 00000000006db0c0 CR3: 0000000093b05000 CR4: 00000000001506e0 [ 616.827438][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.827442][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.827445][ C1] Call Trace: [ 616.827448][ C1] lock_acquire+0xbe/0xaf0 [ 616.827451][ C1] ? lock_release+0x8f0/0x8f0 [ 616.827454][ C1] ? preempt_schedule_notrace_thunk+0x16/0x31 [ 616.827458][ C1] ? preempt_schedule_notrace+0xa6/0x110 [ 616.827461][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.827464][ C1] __mutex_lock+0x134/0x10e0 [ 616.827467][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 616.827470][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 616.827474][ C1] ? check_preemption_disabled+0x50/0x130 [ 616.827477][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 616.827480][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 616.827483][ C1] ? wait_for_completion+0x260/0x260 [ 616.827485][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 616.827488][ C1] tcf_connmark_init+0x2de/0x910 [ 616.827491][ C1] ? tcf_connmark_act+0xb40/0xb40 [ 616.827494][ C1] ? lock_downgrade+0x830/0x830 [ 616.827496][ C1] ? __kmalloc_track_caller+0x38/0x360 [ 616.827499][ C1] tcf_action_init_1+0x63f/0x990 [ 616.827502][ C1] ? tcf_action_dump_old+0x80/0x80 [ 616.827505][ C1] tcf_action_init+0x265/0x4b0 [ 616.827508][ C1] ? tcf_action_init_1+0x990/0x990 [ 616.827510][ C1] tcf_action_add+0xd9/0x360 [ 616.827513][ C1] ? tca_action_gd+0xe20/0xe20 [ 616.827515][ C1] ? lock_acquire+0x1f3/0xaf0 [ 616.827518][ C1] ? bpf_lsm_capable+0x5/0x10 [ 616.827520][ C1] ? __nla_parse+0x3d/0x4a [ 616.827523][ C1] tc_ctl_action+0x33a/0x439 [ 616.827526][ C1] ? tcf_action_add+0x360/0x360 [ 616.827529][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.827531][ C1] ? tcf_action_add+0x360/0x360 [ 616.827534][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 616.827537][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 616.827540][ C1] ? lock_acquire+0x1f3/0xaf0 [ 616.827542][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 616.827545][ C1] netlink_rcv_skb+0x15a/0x430 [ 616.827548][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 616.827551][ C1] ? netlink_ack+0xa10/0xa10 [ 616.827577][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 616.827580][ C1] netlink_unicast+0x533/0x7d0 [ 616.827583][ C1] ? netlink_attachskb+0x810/0x810 [ 616.827585][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 616.827588][ C1] ? __check_object_size+0x171/0x3e4 [ 616.827591][ C1] netlink_sendmsg+0x856/0xd90 [ 616.827594][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 616.827597][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 616.827600][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 616.827602][ C1] sock_sendmsg+0xcf/0x120 [ 616.827605][ C1] ____sys_sendmsg+0x6e8/0x810 [ 616.827608][ C1] ? kernel_sendmsg+0x50/0x50 [ 616.827610][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 616.827614][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.827616][ C1] ? __lock_acquire+0xb92/0x5780 [ 616.827619][ C1] ___sys_sendmsg+0xf3/0x170 [ 616.827622][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 616.827625][ C1] ? __fget_files+0x272/0x400 [ 616.827627][ C1] ? lock_downgrade+0x830/0x830 [ 616.827631][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 616.827633][ C1] ? __fget_files+0x294/0x400 [ 616.827636][ C1] ? __fget_light+0xea/0x280 [ 616.827638][ C1] __sys_sendmsg+0xe5/0x1b0 [ 616.827641][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 616.827644][ C1] ? __x64_sys_futex+0x382/0x4e0 [ 616.827647][ C1] ? check_preemption_disabled+0x50/0x130 [ 616.827650][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 616.827653][ C1] do_syscall_64+0x2d/0x70 [ 616.827656][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.827659][ C1] RIP: 0033:0x446b59 [ 616.827668][ C1] Code: e8 5c b3 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 8b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 616.827671][ C1] RSP: 002b:00007ff2b82d7d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 616.827678][ C1] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446b59 [ 616.827682][ C1] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 [ 616.827687][ C1] RBP: 00000000006dbc30 R08: 000000000000000d R09: 0000000000000000 [ 616.827691][ C1] R10: 0000000000000050 R11: 0000000000000246 R12: 00000000006dbc3c [ 616.827695][ C1] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 616.846771][ T1171] Kernel panic - not syncing: hung_task: blocked tasks [ 617.375425][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 617.383649][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.393692][ T1171] Call Trace: [ 617.396982][ T1171] dump_stack+0x198/0x1fd [ 617.401308][ T1171] panic+0x382/0x7fb [ 617.405201][ T1171] ? __warn_printk+0xf3/0xf3 [ 617.409787][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.415412][ T1171] ? preempt_schedule_thunk+0x16/0x18 [ 617.420777][ T1171] ? watchdog.cold+0x5/0x16b [ 617.425356][ T1171] ? watchdog+0xa82/0x1000 [ 617.429769][ T1171] watchdog.cold+0x16/0x16b [ 617.434270][ T1171] ? reset_hung_task_detector+0x30/0x30 [ 617.439810][ T1171] kthread+0x3b5/0x4a0 [ 617.443884][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 617.448991][ T1171] ret_from_fork+0x1f/0x30 [ 617.454983][ T1171] Kernel Offset: disabled [ 617.459313][ T1171] Rebooting in 86400 seconds..