[ 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 '10.128.0.136' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 844.488789][ T6892] netlink: 32 bytes leftover after parsing attributes in process `syz-executor243'. [ 1005.543123][ T1176] INFO: task syz-executor243:6892 blocked for more than 143 seconds. [ 1005.551440][ T1176] Not tainted 5.9.0-rc8-syzkaller #0 [ 1005.559612][ T1176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1005.570121][ T1176] task:syz-executor243 state:D stack:25816 pid: 6892 ppid: 6890 flags:0x00004004 [ 1005.580148][ T1176] Call Trace: [ 1005.584229][ T1176] __schedule+0xec9/0x2280 [ 1005.588665][ T1176] ? io_schedule_timeout+0x140/0x140 [ 1005.595036][ T1176] schedule+0xd0/0x2a0 [ 1005.599118][ T1176] schedule_preempt_disabled+0xf/0x20 [ 1005.605594][ T1176] __mutex_lock+0x3e2/0x10e0 [ 1005.610266][ T1176] ? tcf_action_init_1+0x747/0x990 [ 1005.616444][ T1176] ? mutex_lock_io_nested+0xf60/0xf60 [ 1005.621866][ T1176] ? lock_downgrade+0x830/0x830 [ 1005.628124][ T1176] ? generic_xdp_install+0x7b0/0x7b0 [ 1005.634206][ T1176] tcf_action_init_1+0x747/0x990 [ 1005.639174][ T1176] ? tcf_action_dump_old+0x80/0x80 [ 1005.645444][ T1176] ? find_held_lock+0x2d/0x110 [ 1005.650247][ T1176] tcf_action_init+0x265/0x4b0 [ 1005.656093][ T1176] ? tcf_action_init_1+0x990/0x990 [ 1005.661350][ T1176] tcf_action_add+0xd9/0x360 [ 1005.667053][ T1176] ? tca_action_gd+0xe20/0xe20 [ 1005.671831][ T1176] ? lock_acquire+0x1f3/0xaf0 [ 1005.677564][ T1176] ? bpf_lsm_capable+0x5/0x10 [ 1005.682333][ T1176] ? __nla_parse+0x3d/0x4a [ 1005.687837][ T1176] tc_ctl_action+0x33a/0x439 [ 1005.692438][ T1176] ? tcf_action_add+0x360/0x360 [ 1005.699501][ T1176] ? lock_is_held_type+0xbb/0xf0 [ 1005.705116][ T1176] ? tcf_action_add+0x360/0x360 [ 1005.710042][ T1176] rtnetlink_rcv_msg+0x44e/0xad0 [ 1005.717042][ T1176] ? rtnetlink_put_metrics+0x510/0x510 [ 1005.722517][ T1176] ? lock_acquire+0x1f3/0xaf0 [ 1005.728270][ T1176] ? netlink_deliver_tap+0x146/0xb70 [ 1005.734186][ T1176] netlink_rcv_skb+0x15a/0x430 [ 1005.738961][ T1176] ? rtnetlink_put_metrics+0x510/0x510 [ 1005.745513][ T1176] ? netlink_ack+0xa10/0xa10 [ 1005.750122][ T1176] ? __kmalloc_node_track_caller+0x38/0x60 [ 1005.756995][ T1176] netlink_unicast+0x533/0x7d0 [ 1005.761798][ T1176] ? netlink_attachskb+0x810/0x810 [ 1005.768571][ T1176] ? __phys_addr_symbol+0x2c/0x70 [ 1005.774296][ T1176] ? __check_object_size+0x171/0x3e4 [ 1005.779595][ T1176] netlink_sendmsg+0x856/0xd90 [ 1005.785440][ T1176] ? netlink_unicast+0x7d0/0x7d0 [ 1005.790395][ T1176] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 1005.796697][ T1176] ? netlink_unicast+0x7d0/0x7d0 [ 1005.801712][ T1176] sock_sendmsg+0xcf/0x120 [ 1005.807191][ T1176] ____sys_sendmsg+0x6e8/0x810 [ 1005.811967][ T1176] ? kernel_sendmsg+0x50/0x50 [ 1005.817885][ T1176] ? do_recvmmsg+0x6d0/0x6d0 [ 1005.822495][ T1176] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1005.830748][ T1176] ? lock_is_held_type+0xbb/0xf0 [ 1005.836361][ T1176] ? find_held_lock+0x2d/0x110 [ 1005.841138][ T1176] ___sys_sendmsg+0xf3/0x170 [ 1005.846805][ T1176] ? sendmsg_copy_msghdr+0x160/0x160 [ 1005.852099][ T1176] ? __fget_files+0x272/0x400 [ 1005.857829][ T1176] ? lock_downgrade+0x830/0x830 [ 1005.862689][ T1176] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 1005.869732][ T1176] ? __fget_files+0x294/0x400 [ 1005.875072][ T1176] ? __fget_light+0xea/0x280 [ 1005.879675][ T1176] __sys_sendmsg+0xe5/0x1b0 [ 1005.885266][ T1176] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1005.890316][ T1176] ? check_preemption_disabled+0x50/0x130 [ 1005.897087][ T1176] ? syscall_enter_from_user_mode+0x1d/0x60 [ 1005.903651][ T1176] do_syscall_64+0x2d/0x70 [ 1005.908151][ T1176] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1005.915097][ T1176] RIP: 0033:0x4476a9 [ 1005.918988][ T1176] Code: Bad RIP value. [ 1005.925285][ T1176] RSP: 002b:00007f3efe76cce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1005.934393][ T1176] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 00000000004476a9 [ 1005.942377][ T1176] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 [ 1005.951485][ T1176] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 1005.961224][ T1176] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 1005.969889][ T1176] R13: 00007ffe90a348cf R14: 00007f3efe76d9c0 R15: 20c49ba5e353f7cf [ 1005.978788][ T1176] [ 1005.978788][ T1176] Showing all locks held in the system: [ 1005.987210][ T1176] 1 lock held by khungtaskd/1176: [ 1005.992233][ T1176] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 1006.004601][ T1176] 3 locks held by kworker/1:2/2639: [ 1006.009804][ T1176] #0: ffff88809a38c138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 1006.021868][ T1176] #1: ffffc900092cfda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 1006.032756][ T1176] #2: ffffffff8b17a308 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 1006.043003][ T1176] 1 lock held by in:imklog/6571: [ 1006.047941][ T1176] #0: ffff8880969c8370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 1006.058166][ T1176] 1 lock held by syz-executor243/6892: [ 1006.064234][ T1176] #0: ffffffff8b17a308 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x747/0x990 [ 1006.074301][ T1176] 2 locks held by syz-executor243/6894: [ 1006.079878][ T1176] [ 1006.082198][ T1176] ============================================= [ 1006.082198][ T1176] [ 1006.093385][ T1176] NMI backtrace for cpu 1 [ 1006.097732][ T1176] CPU: 1 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 1006.105960][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.116007][ T1176] Call Trace: [ 1006.119369][ T1176] dump_stack+0x198/0x1fd [ 1006.123701][ T1176] nmi_cpu_backtrace.cold+0x70/0xb1 [ 1006.128896][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1006.134524][ T1176] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 1006.140499][ T1176] watchdog+0xd7d/0x1000 [ 1006.144759][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 1006.150323][ T1176] kthread+0x3b5/0x4a0 [ 1006.154397][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 1006.159510][ T1176] ret_from_fork+0x1f/0x30 [ 1006.164232][ T1176] Sending NMI from CPU 1 to CPUs 0: [ 1006.170158][ C0] NMI backtrace for cpu 0 [ 1006.170165][ C0] CPU: 0 PID: 6894 Comm: syz-executor243 Not tainted 5.9.0-rc8-syzkaller #0 [ 1006.170171][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.170175][ C0] RIP: 0010:idr_find+0xd/0x50 [ 1006.170187][ C0] Code: ef 31 d2 48 29 c3 48 89 de 5b 5d e9 cd 12 01 00 e8 e8 c6 df fd eb e4 66 0f 1f 44 00 00 55 48 89 fd 53 48 89 f3 e8 a3 fd 9d fd <48> 8d 7d 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f [ 1006.170191][ C0] RSP: 0018:ffffc90005526ef8 EFLAGS: 00000293 [ 1006.170199][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff869815e9 [ 1006.170204][ C0] RDX: ffff888093f14280 RSI: ffffffff83d88a5d RDI: ffff888099e22890 [ 1006.170210][ C0] RBP: ffff888099e22890 R08: 0000000000000000 R09: ffff888099e22807 [ 1006.170215][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900055270f0 [ 1006.170220][ C0] R13: 0000000000000000 R14: ffff888099e22800 R15: ffff888099e22890 [ 1006.170226][ C0] FS: 00007f3efe74c700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 1006.170231][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1006.170236][ C0] CR2: 00007f9d0bc36118 CR3: 00000000a8b73000 CR4: 00000000001506f0 [ 1006.170241][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1006.170246][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1006.170249][ C0] Call Trace: [ 1006.170252][ C0] tcf_idr_check_alloc+0xb0/0x3b0 [ 1006.170256][ C0] tcf_connmark_init+0x2de/0x910 [ 1006.170259][ C0] ? tcf_connmark_act+0xb40/0xb40 [ 1006.170263][ C0] ? lock_downgrade+0x830/0x830 [ 1006.170267][ C0] ? __kmalloc_track_caller+0x38/0x360 [ 1006.170270][ C0] tcf_action_init_1+0x63f/0x990 [ 1006.170274][ C0] ? tcf_action_dump_old+0x80/0x80 [ 1006.170277][ C0] tcf_action_init+0x265/0x4b0 [ 1006.170281][ C0] ? tcf_action_init_1+0x990/0x990 [ 1006.170284][ C0] tcf_action_add+0xd9/0x360 [ 1006.170287][ C0] ? tca_action_gd+0xe20/0xe20 [ 1006.170291][ C0] ? lock_acquire+0x1f3/0xaf0 [ 1006.170294][ C0] ? bpf_lsm_capable+0x5/0x10 [ 1006.170297][ C0] ? __nla_parse+0x3d/0x4a [ 1006.170301][ C0] tc_ctl_action+0x33a/0x439 [ 1006.170304][ C0] ? tcf_action_add+0x360/0x360 [ 1006.170308][ C0] ? lock_is_held_type+0xbb/0xf0 [ 1006.170311][ C0] ? tcf_action_add+0x360/0x360 [ 1006.170314][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 1006.170318][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 1006.170321][ C0] ? lock_acquire+0x1f3/0xaf0 [ 1006.170325][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 1006.170329][ C0] netlink_rcv_skb+0x15a/0x430 [ 1006.170332][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 1006.170336][ C0] ? netlink_ack+0xa10/0xa10 [ 1006.170340][ C0] ? __kmalloc_node_track_caller+0x38/0x60 [ 1006.170343][ C0] netlink_unicast+0x533/0x7d0 [ 1006.170347][ C0] ? netlink_attachskb+0x810/0x810 [ 1006.170350][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 1006.170354][ C0] ? __check_object_size+0x171/0x3e4 [ 1006.170357][ C0] netlink_sendmsg+0x856/0xd90 [ 1006.170361][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1006.170364][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 1006.170368][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1006.170371][ C0] sock_sendmsg+0xcf/0x120 [ 1006.170374][ C0] ____sys_sendmsg+0x6e8/0x810 [ 1006.170378][ C0] ? kernel_sendmsg+0x50/0x50 [ 1006.170381][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 1006.170385][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1006.170388][ C0] ? __lock_acquire+0xb92/0x5780 [ 1006.170392][ C0] ___sys_sendmsg+0xf3/0x170 [ 1006.170395][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 1006.170399][ C0] ? __fget_files+0x272/0x400 [ 1006.170402][ C0] ? lock_downgrade+0x830/0x830 [ 1006.170406][ C0] ? percpu_counter_add_batch+0x126/0x180 [ 1006.170409][ C0] ? __fget_files+0x294/0x400 [ 1006.170413][ C0] ? __fget_light+0xea/0x280 [ 1006.170416][ C0] __sys_sendmsg+0xe5/0x1b0 [ 1006.170419][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1006.170423][ C0] ? __x64_sys_futex+0x382/0x4e0 [ 1006.170427][ C0] ? check_preemption_disabled+0x50/0x130 [ 1006.170430][ C0] ? syscall_enter_from_user_mode+0x1d/0x60 [ 1006.170433][ C0] do_syscall_64+0x2d/0x70 [ 1006.170437][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1006.170439][ C0] RIP: 0033:0x4476a9 [ 1006.170449][ C0] Code: e8 4c b4 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 [ 1006.170453][ C0] RSP: 002b:00007f3efe74bce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1006.170461][ C0] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 00000000004476a9 [ 1006.170465][ C0] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 [ 1006.170470][ C0] RBP: 00000000006dcc30 R08: 0000000000000000 R09: 0000000000000000 [ 1006.170475][ C0] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000006dcc3c [ 1006.170479][ C0] R13: 00007ffe90a348cf R14: 00007f3efe74c9c0 R15: 20c49ba5e353f7cf [ 1006.182955][ T1176] Kernel panic - not syncing: hung_task: blocked tasks [ 1006.652092][ T1176] CPU: 1 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 1006.660333][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.670376][ T1176] Call Trace: [ 1006.673669][ T1176] dump_stack+0x198/0x1fd [ 1006.678000][ T1176] panic+0x382/0x7fb [ 1006.681891][ T1176] ? __warn_printk+0xf3/0xf3 [ 1006.686508][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1006.692157][ T1176] ? preempt_schedule_thunk+0x16/0x18 [ 1006.697549][ T1176] ? watchdog.cold+0x5/0x16b [ 1006.702134][ T1176] ? watchdog+0xa82/0x1000 [ 1006.706562][ T1176] watchdog.cold+0x16/0x16b [ 1006.711067][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 1006.716609][ T1176] kthread+0x3b5/0x4a0 [ 1006.720675][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 1006.725786][ T1176] ret_from_fork+0x1f/0x30 [ 1006.731770][ T1176] Kernel Offset: disabled [ 1006.736116][ T1176] Rebooting in 86400 seconds..