Warning: Permanently added '10.128.0.180' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 820.195953][ T6873] netlink: 32 bytes leftover after parsing attributes in process `syz-executor613'. [ 964.560872][ T1161] INFO: task syz-executor613:6873 blocked for more than 143 seconds. [ 964.569143][ T1161] Not tainted 5.9.0-rc8-syzkaller #0 [ 964.576591][ T1161] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 964.587429][ T1161] task:syz-executor613 state:D stack:25816 pid: 6873 ppid: 6871 flags:0x00004004 [ 964.597621][ T1161] Call Trace: [ 964.601743][ T1161] __schedule+0xec9/0x2280 [ 964.606218][ T1161] ? io_schedule_timeout+0x140/0x140 [ 964.612857][ T1161] schedule+0xd0/0x2a0 [ 964.616947][ T1161] schedule_preempt_disabled+0xf/0x20 [ 964.623612][ T1161] __mutex_lock+0x3e2/0x10e0 [ 964.628285][ T1161] ? tcf_action_init_1+0x747/0x990 [ 964.634666][ T1161] ? mutex_lock_io_nested+0xf60/0xf60 [ 964.640095][ T1161] ? lock_downgrade+0x830/0x830 [ 964.646371][ T1161] ? generic_xdp_install+0x7b0/0x7b0 [ 964.652430][ T1161] tcf_action_init_1+0x747/0x990 [ 964.657386][ T1161] ? tcf_action_dump_old+0x80/0x80 [ 964.663753][ T1161] ? find_held_lock+0x2d/0x110 [ 964.668577][ T1161] tcf_action_init+0x265/0x4b0 [ 964.674627][ T1161] ? tcf_action_init_1+0x990/0x990 [ 964.679805][ T1161] tcf_action_add+0xd9/0x360 [ 964.685678][ T1161] ? tca_action_gd+0xe20/0xe20 [ 964.690467][ T1161] ? lock_acquire+0x1f3/0xaf0 [ 964.696401][ T1161] ? bpf_lsm_capable+0x5/0x10 [ 964.701907][ T1161] ? __nla_parse+0x3d/0x4a [ 964.706561][ T1161] tc_ctl_action+0x33a/0x439 [ 964.713531][ T1161] ? tcf_action_add+0x360/0x360 [ 964.718481][ T1161] ? lock_is_held_type+0xbb/0xf0 [ 964.724729][ T1161] ? tcf_action_add+0x360/0x360 [ 964.729663][ T1161] rtnetlink_rcv_msg+0x44e/0xad0 [ 964.736776][ T1161] ? rtnetlink_put_metrics+0x510/0x510 [ 964.743050][ T1161] ? lock_acquire+0x1f3/0xaf0 [ 964.747897][ T1161] ? netlink_deliver_tap+0x146/0xb70 [ 964.754523][ T1161] netlink_rcv_skb+0x15a/0x430 [ 964.759318][ T1161] ? rtnetlink_put_metrics+0x510/0x510 [ 964.766202][ T1161] ? netlink_ack+0xa10/0xa10 [ 964.771564][ T1161] ? __kmalloc_node_track_caller+0x38/0x60 [ 964.777489][ T1161] netlink_unicast+0x533/0x7d0 [ 964.783555][ T1161] ? netlink_attachskb+0x810/0x810 [ 964.788692][ T1161] ? __phys_addr_symbol+0x2c/0x70 [ 964.794974][ T1161] ? __check_object_size+0x171/0x3e4 [ 964.800330][ T1161] netlink_sendmsg+0x856/0xd90 [ 964.806370][ T1161] ? netlink_unicast+0x7d0/0x7d0 [ 964.812149][ T1161] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 964.817466][ T1161] ? netlink_unicast+0x7d0/0x7d0 [ 964.823752][ T1161] sock_sendmsg+0xcf/0x120 [ 964.828189][ T1161] ____sys_sendmsg+0x6e8/0x810 [ 964.834500][ T1161] ? kernel_sendmsg+0x50/0x50 [ 964.839254][ T1161] ? do_recvmmsg+0x6d0/0x6d0 [ 964.846276][ T1161] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 964.853028][ T1161] ? lock_is_held_type+0xbb/0xf0 [ 964.858097][ T1161] ? find_held_lock+0x2d/0x110 [ 964.864139][ T1161] ___sys_sendmsg+0xf3/0x170 [ 964.868746][ T1161] ? sendmsg_copy_msghdr+0x160/0x160 [ 964.875260][ T1161] ? __fget_files+0x272/0x400 [ 964.879959][ T1161] ? lock_downgrade+0x830/0x830 [ 964.886131][ T1161] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 964.893064][ T1161] ? __fget_files+0x294/0x400 [ 964.897779][ T1161] ? __fget_light+0xea/0x280 [ 964.904754][ T1161] __sys_sendmsg+0xe5/0x1b0 [ 964.909286][ T1161] ? __sys_sendmsg_sock+0xb0/0xb0 [ 964.915635][ T1161] ? check_preemption_disabled+0x50/0x130 [ 964.922087][ T1161] ? syscall_enter_from_user_mode+0x1d/0x60 [ 964.928003][ T1161] do_syscall_64+0x2d/0x70 [ 964.933830][ T1161] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 964.939758][ T1161] RIP: 0033:0x447019 [ 964.945884][ T1161] Code: Bad RIP value. [ 964.949960][ T1161] RSP: 002b:00007f07785e1d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 964.959586][ T1161] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000447019 [ 964.968373][ T1161] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 [ 964.978322][ T1161] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 964.987212][ T1161] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 964.996022][ T1161] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 965.004952][ T1161] [ 965.004952][ T1161] Showing all locks held in the system: [ 965.013646][ T1161] 1 lock held by khungtaskd/1161: [ 965.018675][ T1161] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 965.031324][ T1161] 1 lock held by in:imklog/6559: [ 965.036277][ T1161] #0: ffff888094327df0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 965.046734][ T1161] 3 locks held by kworker/1:1/6864: [ 965.052795][ T1161] #0: ffff888214d51938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 965.064719][ T1161] #1: ffffc90001087da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 965.075850][ T1161] #2: ffffffff8b17a308 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 965.086251][ T1161] 1 lock held by syz-executor613/6873: [ 965.092423][ T1161] #0: ffffffff8b17a308 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x747/0x990 [ 965.104008][ T1161] 1 lock held by syz-executor613/6875: [ 965.109521][ T1161] [ 965.113089][ T1161] ============================================= [ 965.113089][ T1161] [ 965.122436][ T1161] NMI backtrace for cpu 1 [ 965.126777][ T1161] CPU: 1 PID: 1161 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 965.135022][ T1161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 965.145093][ T1161] Call Trace: [ 965.148467][ T1161] dump_stack+0x198/0x1fd [ 965.153354][ T1161] nmi_cpu_backtrace.cold+0x70/0xb1 [ 965.158565][ T1161] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 965.164238][ T1161] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 965.170240][ T1161] watchdog+0xd7d/0x1000 [ 965.174495][ T1161] ? reset_hung_task_detector+0x30/0x30 [ 965.180251][ T1161] kthread+0x3b5/0x4a0 [ 965.184349][ T1161] ? __kthread_bind_mask+0xc0/0xc0 [ 965.189473][ T1161] ret_from_fork+0x1f/0x30 [ 965.194153][ T1161] Sending NMI from CPU 1 to CPUs 0: [ 965.200356][ C0] NMI backtrace for cpu 0 [ 965.200363][ C0] CPU: 0 PID: 6875 Comm: syz-executor613 Not tainted 5.9.0-rc8-syzkaller #0 [ 965.200370][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 965.200374][ C0] RIP: 0010:check_memory_region+0x5f/0x180 [ 965.200387][ C0] Code: 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 49 8d 5a 01 48 89 da 48 29 ea <48> 83 fa 10 7e 63 41 89 eb 41 83 e3 07 75 74 4c 8d 5a 07 48 85 d2 [ 965.200392][ C0] RSP: 0018:ffffc90001476b40 EFLAGS: 00000002 [ 965.200401][ C0] RAX: fffffbfff1a22154 RBX: fffffbfff1a22155 RCX: ffffffff815bca30 [ 965.200407][ C0] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8d110aa0 [ 965.200413][ C0] RBP: fffffbfff1a22154 R08: 0000000000000000 R09: ffffffff8d110aa7 [ 965.200419][ C0] R10: fffffbfff1a22154 R11: 0000000000000000 R12: ffff88808ef78af0 [ 965.200425][ C0] R13: ffff88808ef78b12 R14: 0000000000000000 R15: ffff88808ef78ac8 [ 965.200431][ C0] FS: 00007f07785c1700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 965.200436][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 965.200442][ C0] CR2: 00007fe79f56d6c0 CR3: 00000000a2d5d000 CR4: 00000000001506f0 [ 965.200448][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 965.200454][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 965.200457][ C0] Call Trace: [ 965.200461][ C0] __lock_acquire+0xfa0/0x5780 [ 965.200466][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 965.200471][ C0] ? arch_local_irq_restore+0x2e/0x50 [ 965.200483][ C0] lock_acquire+0x1f3/0xaf0 [ 965.200487][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 965.200492][ C0] ? lock_release+0x8f0/0x8f0 [ 965.200496][ C0] ? preempt_schedule_thunk+0x16/0x18 [ 965.200500][ C0] ? lock_is_held_type+0xbb/0xf0 [ 965.200504][ C0] __mutex_lock+0x134/0x10e0 [ 965.200509][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 965.200513][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 965.200518][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 965.200522][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 965.200527][ C0] ? wait_for_completion+0x260/0x260 [ 965.200531][ C0] tcf_idr_check_alloc+0x78/0x3b0 [ 965.200535][ C0] tcf_connmark_init+0x2de/0x910 [ 965.200540][ C0] ? tcf_connmark_act+0xb40/0xb40 [ 965.200544][ C0] ? lock_downgrade+0x830/0x830 [ 965.200548][ C0] ? __kmalloc_track_caller+0x38/0x360 [ 965.200553][ C0] tcf_action_init_1+0x63f/0x990 [ 965.200557][ C0] ? tcf_action_dump_old+0x80/0x80 [ 965.200561][ C0] tcf_action_init+0x265/0x4b0 [ 965.200565][ C0] ? tcf_action_init_1+0x990/0x990 [ 965.200570][ C0] tcf_action_add+0xd9/0x360 [ 965.200574][ C0] ? tca_action_gd+0xe20/0xe20 [ 965.200578][ C0] ? lock_acquire+0x1f3/0xaf0 [ 965.200582][ C0] ? bpf_lsm_capable+0x5/0x10 [ 965.200586][ C0] ? __nla_parse+0x3d/0x4a [ 965.200590][ C0] tc_ctl_action+0x33a/0x439 [ 965.200594][ C0] ? tcf_action_add+0x360/0x360 [ 965.200598][ C0] ? lock_is_held_type+0xbb/0xf0 [ 965.200606][ C0] ? tcf_action_add+0x360/0x360 [ 965.200610][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 965.200615][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 965.200619][ C0] ? lock_acquire+0x1f3/0xaf0 [ 965.200622][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 965.200626][ C0] netlink_rcv_skb+0x15a/0x430 [ 965.200630][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 965.200633][ C0] ? netlink_ack+0xa10/0xa10 [ 965.200635][ C0] ? __kmalloc_node_track_caller+0x38/0x60 [ 965.200638][ C0] netlink_unicast+0x533/0x7d0 [ 965.200640][ C0] ? netlink_attachskb+0x810/0x810 [ 965.200644][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 965.200648][ C0] ? __check_object_size+0x171/0x3e4 [ 965.200651][ C0] netlink_sendmsg+0x856/0xd90 [ 965.200653][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 965.200656][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 965.200658][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 965.200661][ C0] sock_sendmsg+0xcf/0x120 [ 965.200663][ C0] ____sys_sendmsg+0x6e8/0x810 [ 965.200665][ C0] ? kernel_sendmsg+0x50/0x50 [ 965.200668][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 965.200670][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 965.200673][ C0] ? __lock_acquire+0xb92/0x5780 [ 965.200675][ C0] ___sys_sendmsg+0xf3/0x170 [ 965.200678][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 965.200680][ C0] ? __fget_files+0x272/0x400 [ 965.200683][ C0] ? lock_downgrade+0x830/0x830 [ 965.200685][ C0] ? percpu_counter_add_batch+0x126/0x180 [ 965.200688][ C0] ? __fget_files+0x294/0x400 [ 965.200690][ C0] ? __fget_light+0xea/0x280 [ 965.200692][ C0] __sys_sendmsg+0xe5/0x1b0 [ 965.200695][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 965.200697][ C0] ? __x64_sys_futex+0x382/0x4e0 [ 965.200700][ C0] ? check_preemption_disabled+0x50/0x130 [ 965.200703][ C0] ? syscall_enter_from_user_mode+0x1d/0x60 [ 965.200705][ C0] do_syscall_64+0x2d/0x70 [ 965.200708][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 965.200710][ C0] RIP: 0033:0x447019 [ 965.200718][ C0] Code: e8 ec b9 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 5b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 965.200720][ C0] RSP: 002b:00007f07785c0d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 965.200727][ C0] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000447019 [ 965.200730][ C0] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 [ 965.200734][ C0] RBP: 00000000006dcc30 R08: 000000000000000d R09: 0000000000000000 [ 965.200737][ C0] R10: 0000000000000050 R11: 0000000000000246 R12: 00000000006dcc3c [ 965.200741][ C0] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 965.220685][ T1161] Kernel panic - not syncing: hung_task: blocked tasks [ 965.758689][ T1161] CPU: 1 PID: 1161 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 965.766925][ T1161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 965.776998][ T1161] Call Trace: [ 965.780296][ T1161] dump_stack+0x198/0x1fd [ 965.784633][ T1161] panic+0x382/0x7fb [ 965.788530][ T1161] ? __warn_printk+0xf3/0xf3 [ 965.793208][ T1161] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 965.798842][ T1161] ? preempt_schedule_thunk+0x16/0x18 [ 965.804217][ T1161] ? watchdog.cold+0x5/0x16b [ 965.808804][ T1161] ? watchdog+0xa82/0x1000 [ 965.813327][ T1161] watchdog.cold+0x16/0x16b [ 965.817878][ T1161] ? reset_hung_task_detector+0x30/0x30 [ 965.823457][ T1161] kthread+0x3b5/0x4a0 [ 965.827527][ T1161] ? __kthread_bind_mask+0xc0/0xc0 [ 965.832790][ T1161] ret_from_fork+0x1f/0x30 [ 965.838459][ T1161] Kernel Offset: disabled [ 965.842839][ T1161] Rebooting in 86400 seconds..