Warning: Permanently added '10.128.0.155' (ECDSA) to the list of known hosts. executing program [ 845.121737][ T6868] netlink: 32 bytes leftover after parsing attributes in process `syz-executor727'. [ 1005.685778][ T1175] INFO: task syz-executor727:6868 blocked for more than 143 seconds. [ 1005.694041][ T1175] Not tainted 5.9.0-rc8-syzkaller #0 [ 1005.702508][ T1175] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1005.713211][ T1175] task:syz-executor727 state:D stack:25600 pid: 6868 ppid: 6866 flags:0x00004004 [ 1005.723596][ T1175] Call Trace: [ 1005.727884][ T1175] __schedule+0xec9/0x2280 [ 1005.732356][ T1175] ? io_schedule_timeout+0x140/0x140 [ 1005.739128][ T1175] schedule+0xd0/0x2a0 [ 1005.743221][ T1175] schedule_preempt_disabled+0xf/0x20 [ 1005.750069][ T1175] __mutex_lock+0x3e2/0x10e0 [ 1005.754729][ T1175] ? tcf_action_init_1+0x747/0x990 [ 1005.761335][ T1175] ? mutex_lock_io_nested+0xf60/0xf60 [ 1005.767863][ T1175] ? lock_downgrade+0x830/0x830 [ 1005.772769][ T1175] ? generic_xdp_install+0x7b0/0x7b0 [ 1005.779422][ T1175] tcf_action_init_1+0x747/0x990 [ 1005.784382][ T1175] ? tcf_action_dump_old+0x80/0x80 [ 1005.790874][ T1175] ? find_held_lock+0x2d/0x110 [ 1005.796531][ T1175] tcf_action_init+0x265/0x4b0 [ 1005.801321][ T1175] ? tcf_action_init_1+0x990/0x990 [ 1005.808123][ T1175] tcf_action_add+0xd9/0x360 [ 1005.812739][ T1175] ? tca_action_gd+0xe20/0xe20 [ 1005.818861][ T1175] ? lock_acquire+0x1f3/0xaf0 [ 1005.823577][ T1175] ? bpf_lsm_capable+0x5/0x10 [ 1005.829635][ T1175] ? __nla_parse+0x3d/0x4a [ 1005.834107][ T1175] tc_ctl_action+0x33a/0x439 [ 1005.841258][ T1175] ? tcf_action_add+0x360/0x360 [ 1005.847089][ T1175] ? lock_is_held_type+0xbb/0xf0 [ 1005.852045][ T1175] ? tcf_action_add+0x360/0x360 [ 1005.858322][ T1175] rtnetlink_rcv_msg+0x44e/0xad0 [ 1005.863276][ T1175] ? rtnetlink_put_metrics+0x510/0x510 [ 1005.871118][ T1175] ? lock_acquire+0x1f3/0xaf0 [ 1005.876749][ T1175] ? netlink_deliver_tap+0x146/0xb70 [ 1005.882066][ T1175] netlink_rcv_skb+0x15a/0x430 [ 1005.888197][ T1175] ? rtnetlink_put_metrics+0x510/0x510 [ 1005.893671][ T1175] ? netlink_ack+0xa10/0xa10 [ 1005.899608][ T1175] ? __kmalloc_node_track_caller+0x38/0x60 [ 1005.905474][ T1175] netlink_unicast+0x533/0x7d0 [ 1005.911645][ T1175] ? netlink_attachskb+0x810/0x810 [ 1005.917667][ T1175] ? __phys_addr_symbol+0x2c/0x70 [ 1005.922702][ T1175] ? __check_object_size+0x171/0x3e4 [ 1005.929573][ T1175] netlink_sendmsg+0x856/0xd90 [ 1005.934378][ T1175] ? netlink_unicast+0x7d0/0x7d0 [ 1005.940785][ T1175] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 1005.946972][ T1175] ? netlink_unicast+0x7d0/0x7d0 [ 1005.952002][ T1175] sock_sendmsg+0xcf/0x120 [ 1005.958290][ T1175] ____sys_sendmsg+0x6e8/0x810 [ 1005.963086][ T1175] ? kernel_sendmsg+0x50/0x50 [ 1005.970507][ T1175] ? do_recvmmsg+0x6d0/0x6d0 [ 1005.975129][ T1175] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1005.982691][ T1175] ? lock_is_held_type+0xbb/0xf0 [ 1005.988641][ T1175] ? find_held_lock+0x2d/0x110 [ 1005.993441][ T1175] ___sys_sendmsg+0xf3/0x170 [ 1005.999519][ T1175] ? sendmsg_copy_msghdr+0x160/0x160 [ 1006.004824][ T1175] ? __fget_files+0x272/0x400 [ 1006.010987][ T1175] ? lock_downgrade+0x830/0x830 [ 1006.016790][ T1175] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 1006.022819][ T1175] ? __fget_files+0x294/0x400 [ 1006.029059][ T1175] ? __fget_light+0xea/0x280 [ 1006.033685][ T1175] __sys_sendmsg+0xe5/0x1b0 [ 1006.039859][ T1175] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1006.044934][ T1175] ? check_preemption_disabled+0x50/0x130 [ 1006.052198][ T1175] ? syscall_enter_from_user_mode+0x1d/0x60 [ 1006.059221][ T1175] do_syscall_64+0x2d/0x70 [ 1006.063724][ T1175] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1006.071018][ T1175] RIP: 0033:0x447b89 [ 1006.074917][ T1175] Code: Bad RIP value. [ 1006.081266][ T1175] RSP: 002b:00007f571c4a2ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1006.090572][ T1175] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000447b89 [ 1006.100569][ T1175] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 [ 1006.109757][ T1175] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 1006.118732][ T1175] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 1006.127651][ T1175] R13: 00007ffc82ce23df R14: 00007f571c4a39c0 R15: 20c49ba5e353f7cf [ 1006.136938][ T1175] [ 1006.136938][ T1175] Showing all locks held in the system: [ 1006.144676][ T1175] 1 lock held by khungtaskd/1175: [ 1006.151211][ T1175] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 1006.162142][ T1175] 3 locks held by kworker/0:2/2661: [ 1006.169828][ T1175] #0: ffff88809a28b938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 1006.181961][ T1175] #1: ffffc900089efda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 1006.193232][ T1175] #2: ffffffff8b17a308 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 1006.203674][ T1175] 1 lock held by in:imklog/6558: [ 1006.209604][ T1175] #0: ffff8880a6d98170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 1006.220030][ T1175] 1 lock held by syz-executor727/6868: [ 1006.225498][ T1175] #0: ffffffff8b17a308 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x747/0x990 [ 1006.237665][ T1175] 1 lock held by syz-executor727/6870: [ 1006.243180][ T1175] [ 1006.247454][ T1175] ============================================= [ 1006.247454][ T1175] [ 1006.256894][ T1175] NMI backtrace for cpu 1 [ 1006.261235][ T1175] CPU: 1 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 1006.269496][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.279551][ T1175] Call Trace: [ 1006.282908][ T1175] dump_stack+0x198/0x1fd [ 1006.287267][ T1175] nmi_cpu_backtrace.cold+0x70/0xb1 [ 1006.292493][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1006.298128][ T1175] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 1006.304114][ T1175] watchdog+0xd7d/0x1000 [ 1006.308366][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 1006.313915][ T1175] kthread+0x3b5/0x4a0 [ 1006.317987][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 1006.323101][ T1175] ret_from_fork+0x1f/0x30 [ 1006.327751][ T1175] Sending NMI from CPU 1 to CPUs 0: [ 1006.333886][ C0] NMI backtrace for cpu 0 [ 1006.333893][ C0] CPU: 0 PID: 6870 Comm: syz-executor727 Not tainted 5.9.0-rc8-syzkaller #0 [ 1006.333900][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.333904][ C0] RIP: 0010:lock_is_held_type+0xa5/0xf0 [ 1006.333916][ C0] Code: bc 01 00 00 00 83 f9 ff 74 11 41 0f b6 46 22 45 31 e4 83 e0 03 39 c8 41 0f 94 c4 65 48 8b 14 25 c0 fe 01 00 8b 82 04 09 00 00 <83> e8 01 66 85 c0 89 82 04 09 00 00 75 27 4c 89 ff e8 d5 bb 23 f9 [ 1006.333920][ C0] RSP: 0018:ffffc9000555ed40 EFLAGS: 00000046 [ 1006.333929][ C0] RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffffffff815c200f [ 1006.333935][ C0] RDX: ffff888093b7c440 RSI: ffffffff8a0683c0 RDI: ffff888093b7cd70 [ 1006.333940][ C0] RBP: ffff888093b7c440 R08: 0000000000000000 R09: ffffffff8b5cba8f [ 1006.333946][ C0] R10: fffffbfff16b9751 R11: 0000000000000000 R12: 0000000000000000 [ 1006.333952][ C0] R13: ffff888093b7cd48 R14: ffff888093b7cd70 R15: 0000000000000286 [ 1006.333958][ C0] FS: 00007f571c482700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 1006.333963][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1006.333969][ C0] CR2: 00007f53247a4ab4 CR3: 000000009e7b1000 CR4: 00000000001506f0 [ 1006.333975][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1006.333981][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1006.333984][ C0] Call Trace: [ 1006.333989][ C0] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 1006.333993][ C0] rcu_read_lock_sched_held+0x3a/0xb0 [ 1006.333997][ C0] lock_release+0x6a1/0x8f0 [ 1006.334002][ C0] ? __mutex_lock+0x626/0x10e0 [ 1006.334006][ C0] ? lock_downgrade+0x830/0x830 [ 1006.334010][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 1006.334015][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 1006.334019][ C0] __mutex_unlock_slowpath+0x81/0x610 [ 1006.334024][ C0] ? wait_for_completion+0x260/0x260 [ 1006.334028][ C0] tcf_idr_check_alloc+0x29e/0x3b0 [ 1006.334032][ C0] tcf_connmark_init+0x2de/0x910 [ 1006.334037][ C0] ? tcf_connmark_act+0xb40/0xb40 [ 1006.334041][ C0] ? lock_downgrade+0x830/0x830 [ 1006.334045][ C0] ? __kmalloc_track_caller+0x38/0x360 [ 1006.334050][ C0] tcf_action_init_1+0x63f/0x990 [ 1006.334054][ C0] ? tcf_action_dump_old+0x80/0x80 [ 1006.334058][ C0] tcf_action_init+0x265/0x4b0 [ 1006.334062][ C0] ? tcf_action_init_1+0x990/0x990 [ 1006.334066][ C0] tcf_action_add+0xd9/0x360 [ 1006.334071][ C0] ? tca_action_gd+0xe20/0xe20 [ 1006.334075][ C0] ? lock_acquire+0x1f3/0xaf0 [ 1006.334079][ C0] ? bpf_lsm_capable+0x5/0x10 [ 1006.334083][ C0] ? __nla_parse+0x3d/0x4a [ 1006.334087][ C0] tc_ctl_action+0x33a/0x439 [ 1006.334091][ C0] ? tcf_action_add+0x360/0x360 [ 1006.334095][ C0] ? lock_is_held_type+0xbb/0xf0 [ 1006.334099][ C0] ? tcf_action_add+0x360/0x360 [ 1006.334104][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 1006.334108][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 1006.334112][ C0] ? lock_acquire+0x1f3/0xaf0 [ 1006.334117][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 1006.334121][ C0] netlink_rcv_skb+0x15a/0x430 [ 1006.334126][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 1006.334130][ C0] ? netlink_ack+0xa10/0xa10 [ 1006.334134][ C0] ? __kmalloc_node_track_caller+0x38/0x60 [ 1006.334139][ C0] netlink_unicast+0x533/0x7d0 [ 1006.334143][ C0] ? netlink_attachskb+0x810/0x810 [ 1006.334147][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 1006.334152][ C0] ? __check_object_size+0x171/0x3e4 [ 1006.334156][ C0] netlink_sendmsg+0x856/0xd90 [ 1006.334160][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1006.334164][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 1006.334169][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1006.334173][ C0] sock_sendmsg+0xcf/0x120 [ 1006.334177][ C0] ____sys_sendmsg+0x6e8/0x810 [ 1006.334181][ C0] ? kernel_sendmsg+0x50/0x50 [ 1006.334185][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 1006.334189][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 1006.334193][ C0] ? __lock_acquire+0xb92/0x5780 [ 1006.334196][ C0] ___sys_sendmsg+0xf3/0x170 [ 1006.334199][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 1006.334201][ C0] ? __fget_files+0x272/0x400 [ 1006.334204][ C0] ? lock_downgrade+0x830/0x830 [ 1006.334207][ C0] ? percpu_counter_add_batch+0x126/0x180 [ 1006.334209][ C0] ? __fget_files+0x294/0x400 [ 1006.334211][ C0] ? __fget_light+0xea/0x280 [ 1006.334214][ C0] __sys_sendmsg+0xe5/0x1b0 [ 1006.334216][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1006.334219][ C0] ? check_preemption_disabled+0x50/0x130 [ 1006.334221][ C0] ? syscall_enter_from_user_mode+0x1d/0x60 [ 1006.334224][ C0] do_syscall_64+0x2d/0x70 [ 1006.334227][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1006.334229][ C0] RIP: 0033:0x447b89 [ 1006.334236][ 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 [ 1006.334239][ C0] RSP: 002b:00007f571c481ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1006.334245][ C0] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000447b89 [ 1006.334249][ C0] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 [ 1006.334252][ C0] RBP: 00000000006dcc30 R08: 0000000000000004 R09: 0000000000000000 [ 1006.334256][ C0] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000006dcc3c [ 1006.334259][ C0] R13: 00007ffc82ce23df R14: 00007f571c4829c0 R15: 20c49ba5e353f7cf [ 1006.345617][ T1175] Kernel panic - not syncing: hung_task: blocked tasks [ 1006.859416][ T1175] CPU: 1 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 1006.867649][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.877704][ T1175] Call Trace: [ 1006.881001][ T1175] dump_stack+0x198/0x1fd [ 1006.885337][ T1175] panic+0x382/0x7fb [ 1006.889252][ T1175] ? __warn_printk+0xf3/0xf3 [ 1006.893845][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1006.899485][ T1175] ? preempt_schedule_thunk+0x16/0x18 [ 1006.904882][ T1175] ? watchdog.cold+0x5/0x16b [ 1006.909475][ T1175] ? watchdog+0xa82/0x1000 [ 1006.913899][ T1175] watchdog.cold+0x16/0x16b [ 1006.918501][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 1006.924050][ T1175] kthread+0x3b5/0x4a0 [ 1006.928121][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 1006.933238][ T1175] ret_from_fork+0x1f/0x30 [ 1006.939087][ T1175] Kernel Offset: disabled [ 1006.943453][ T1175] Rebooting in 86400 seconds..