Warning: Permanently added '10.128.10.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 475.735916][ T6884] IPVS: ftp: loaded support on port[0] = 21 [ 475.780321][ T6906] netlink: 32 bytes leftover after parsing attributes in process `syz-executor411'. [ 636.950895][ T1125] INFO: task syz-executor411:6906 blocked for more than 143 seconds. [ 636.959241][ T1125] Not tainted 5.9.0-rc8-syzkaller #0 [ 636.967886][ T1125] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.977750][ T1125] task:syz-executor411 state:D stack:25816 pid: 6906 ppid: 6884 flags:0x00004004 [ 636.988049][ T1125] Call Trace: [ 636.992423][ T1125] __schedule+0xec9/0x2280 [ 636.997099][ T1125] ? io_schedule_timeout+0x140/0x140 [ 637.005098][ T1125] schedule+0xd0/0x2a0 [ 637.009371][ T1125] schedule_preempt_disabled+0xf/0x20 [ 637.016533][ T1125] __mutex_lock+0x3e2/0x10e0 [ 637.022444][ T1125] ? tcf_action_init_1+0x747/0x990 [ 637.027778][ T1125] ? mutex_lock_io_nested+0xf60/0xf60 [ 637.034702][ T1125] ? lock_downgrade+0x830/0x830 [ 637.039953][ T1125] ? generic_xdp_install+0x700/0x700 [ 637.046717][ T1125] tcf_action_init_1+0x747/0x990 [ 637.052723][ T1125] ? tcf_action_dump_old+0x80/0x80 [ 637.058565][ T1125] ? find_held_lock+0x2d/0x110 [ 637.064835][ T1125] tcf_action_init+0x265/0x4b0 [ 637.069795][ T1125] ? tcf_action_init_1+0x990/0x990 [ 637.077246][ T1125] tcf_action_add+0xd9/0x360 [ 637.083195][ T1125] ? tca_action_gd+0xe20/0xe20 [ 637.088165][ T1125] ? lock_acquire+0x1f3/0xaf0 [ 637.094176][ T1125] ? bpf_lsm_capable+0x5/0x10 [ 637.099099][ T1125] ? __nla_parse+0x3d/0x4a [ 637.104914][ T1125] tc_ctl_action+0x33a/0x439 [ 637.109621][ T1125] ? tcf_action_add+0x360/0x360 [ 637.116021][ T1125] ? lock_is_held_type+0xbb/0xf0 [ 637.121975][ T1125] ? tcf_action_add+0x360/0x360 [ 637.127001][ T1125] rtnetlink_rcv_msg+0x44e/0xad0 [ 637.134840][ T1125] ? rtnetlink_put_metrics+0x510/0x510 [ 637.140360][ T1125] ? lock_acquire+0x1f3/0xaf0 [ 637.147892][ T1125] ? netlink_deliver_tap+0x146/0xb70 [ 637.154779][ T1125] netlink_rcv_skb+0x15a/0x430 [ 637.159796][ T1125] ? rtnetlink_put_metrics+0x510/0x510 [ 637.166912][ T1125] ? netlink_ack+0xa10/0xa10 [ 637.172736][ T1125] ? __kmalloc_node_track_caller+0x38/0x60 [ 637.178665][ T1125] netlink_unicast+0x533/0x7d0 [ 637.184973][ T1125] ? netlink_attachskb+0x810/0x810 [ 637.191732][ T1125] ? __phys_addr_symbol+0x2c/0x70 [ 637.197900][ T1125] ? __check_object_size+0x171/0x3e4 [ 637.205043][ T1125] netlink_sendmsg+0x856/0xd90 [ 637.210465][ T1125] ? netlink_unicast+0x7d0/0x7d0 [ 637.217348][ T1125] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 637.223832][ T1125] ? netlink_unicast+0x7d0/0x7d0 [ 637.229330][ T1125] sock_sendmsg+0xcf/0x120 [ 637.235710][ T1125] ____sys_sendmsg+0x6e8/0x810 [ 637.241637][ T1125] ? kernel_sendmsg+0x50/0x50 [ 637.247129][ T1125] ? do_recvmmsg+0x6d0/0x6d0 [ 637.253822][ T1125] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.260145][ T1125] ? lock_is_held_type+0xbb/0xf0 [ 637.267837][ T1125] ? find_held_lock+0x2d/0x110 [ 637.273777][ T1125] ___sys_sendmsg+0xf3/0x170 [ 637.278999][ T1125] ? sendmsg_copy_msghdr+0x160/0x160 [ 637.285864][ T1125] ? __fget_files+0x272/0x400 [ 637.291416][ T1125] ? lock_downgrade+0x830/0x830 [ 637.296425][ T1125] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 637.304071][ T1125] ? __fget_files+0x294/0x400 [ 637.309368][ T1125] ? __fget_light+0xea/0x280 [ 637.315617][ T1125] __sys_sendmsg+0xe5/0x1b0 [ 637.320385][ T1125] ? __sys_sendmsg_sock+0xb0/0xb0 [ 637.326760][ T1125] ? check_preemption_disabled+0x50/0x130 [ 637.333760][ T1125] ? syscall_enter_from_user_mode+0x1d/0x60 [ 637.340547][ T1125] do_syscall_64+0x2d/0x70 [ 637.346824][ T1125] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.354035][ T1125] RIP: 0033:0x446c49 [ 637.358954][ T1125] Code: Bad RIP value. [ 637.365517][ T1125] RSP: 002b:00007f1e24369d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 637.375093][ T1125] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446c49 [ 637.385609][ T1125] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 [ 637.396852][ T1125] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 637.406619][ T1125] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.416209][ T1125] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 637.425278][ T1125] [ 637.425278][ T1125] Showing all locks held in the system: [ 637.434511][ T1125] 1 lock held by khungtaskd/1125: [ 637.439894][ T1125] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.452968][ T1125] 3 locks held by kworker/0:4/3931: [ 637.459160][ T1125] #0: ffff888214e56138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 637.470810][ T1125] #1: ffffc900015f7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 637.481662][ T1125] #2: ffffffff8b150988 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 637.492178][ T1125] 1 lock held by in:imklog/6575: [ 637.497309][ T1125] #0: ffff88809edb6130 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.507036][ T1125] 1 lock held by syz-executor411/6906: [ 637.513235][ T1125] #0: ffffffff8b150988 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x747/0x990 [ 637.524497][ T1125] 1 lock held by syz-executor411/6908: [ 637.531027][ T1125] [ 637.533531][ T1125] ============================================= [ 637.533531][ T1125] [ 637.542547][ T1125] NMI backtrace for cpu 0 [ 637.547177][ T1125] CPU: 0 PID: 1125 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 637.556164][ T1125] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.571337][ T1125] Call Trace: [ 637.574721][ T1125] dump_stack+0x198/0x1fd [ 637.579067][ T1125] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.584571][ T1125] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.590298][ T1125] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.596432][ T1125] watchdog+0xd7d/0x1000 [ 637.601246][ T1125] ? reset_hung_task_detector+0x30/0x30 [ 637.607035][ T1125] kthread+0x3b5/0x4a0 [ 637.611114][ T1125] ? __kthread_bind_mask+0xc0/0xc0 [ 637.619861][ T1125] ret_from_fork+0x1f/0x30 [ 637.624507][ T1125] Sending NMI from CPU 0 to CPUs 1: [ 637.630674][ C1] NMI backtrace for cpu 1 [ 637.630680][ C1] CPU: 1 PID: 6908 Comm: syz-executor411 Not tainted 5.9.0-rc8-syzkaller #0 [ 637.630686][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.630689][ C1] RIP: 0010:mark_lock+0x15/0x1660 [ 637.630700][ C1] Code: 8c e8 3f e0 61 02 48 98 c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 41 54 55 53 48 83 ec 20 83 fa 09 48 89 3c 24 <0f> 87 18 01 00 00 83 fa 08 49 89 f7 89 d5 0f 84 b9 00 00 00 41 be [ 637.630704][ C1] RSP: 0018:ffffc900016e6b08 EFLAGS: 00000093 [ 637.630711][ C1] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff815b7f72 [ 637.630715][ C1] RDX: 0000000000000006 RSI: ffff88808dfe8c90 RDI: ffff88808dfe8380 [ 637.630720][ C1] RBP: ffff88808dfe8380 R08: 0000000000000000 R09: ffffffff8d0c3a9f [ 637.630724][ C1] R10: fffffbfff1a18753 R11: 0000000000000000 R12: ffff88808dfe8c90 [ 637.630728][ C1] R13: ffff88808dfe8cb2 R14: 0000000000000000 R15: ffff88808dfe8c68 [ 637.630733][ C1] FS: 00007f1e24349700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 637.630736][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.630741][ C1] CR2: 00007f625441b000 CR3: 000000009ea7a000 CR4: 00000000001506e0 [ 637.630745][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.630749][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.630751][ C1] Call Trace: [ 637.630754][ C1] __lock_acquire+0x8a0/0x5780 [ 637.630757][ C1] ? _raw_spin_unlock_irq+0x55/0x80 [ 637.630759][ C1] ? finish_task_switch+0x150/0x790 [ 637.630762][ C1] ? finish_task_switch+0x122/0x790 [ 637.630766][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.630768][ C1] ? __schedule+0xed1/0x2280 [ 637.630771][ C1] lock_acquire+0x1f3/0xaf0 [ 637.630774][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 637.630777][ C1] ? lock_release+0x8f0/0x8f0 [ 637.630780][ C1] ? preempt_schedule_thunk+0x16/0x18 [ 637.630783][ C1] ? lock_is_held_type+0xbb/0xf0 [ 637.630786][ C1] __mutex_lock+0x134/0x10e0 [ 637.630789][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 637.630791][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 637.630794][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 637.630797][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 637.630800][ C1] ? wait_for_completion+0x260/0x260 [ 637.630803][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 637.630806][ C1] tcf_connmark_init+0x2de/0x910 [ 637.630809][ C1] ? tcf_connmark_act+0xb40/0xb40 [ 637.630812][ C1] ? lock_downgrade+0x830/0x830 [ 637.630815][ C1] ? __kmalloc_track_caller+0x38/0x360 [ 637.630818][ C1] tcf_action_init_1+0x63f/0x990 [ 637.630821][ C1] ? tcf_action_dump_old+0x80/0x80 [ 637.630824][ C1] tcf_action_init+0x265/0x4b0 [ 637.630826][ C1] ? tcf_action_init_1+0x990/0x990 [ 637.630829][ C1] ? __lock_acquire+0xb92/0x5780 [ 637.630832][ C1] tcf_action_add+0xd9/0x360 [ 637.630834][ C1] ? tca_action_gd+0xe20/0xe20 [ 637.630837][ C1] ? lock_acquire+0x1f3/0xaf0 [ 637.630840][ C1] ? bpf_lsm_capable+0x5/0x10 [ 637.630842][ C1] ? __nla_parse+0x3d/0x4a [ 637.630845][ C1] tc_ctl_action+0x33a/0x439 [ 637.630848][ C1] ? tcf_action_add+0x360/0x360 [ 637.630851][ C1] ? lock_is_held_type+0xbb/0xf0 [ 637.630853][ C1] ? tcf_action_add+0x360/0x360 [ 637.630856][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 637.630859][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 637.630862][ C1] ? lock_acquire+0x1f3/0xaf0 [ 637.630865][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 637.630868][ C1] netlink_rcv_skb+0x15a/0x430 [ 637.630871][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 637.630873][ C1] ? netlink_ack+0xa10/0xa10 [ 637.630877][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 637.630879][ C1] netlink_unicast+0x533/0x7d0 [ 637.630882][ C1] ? netlink_attachskb+0x810/0x810 [ 637.630885][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 637.630888][ C1] ? __check_object_size+0x171/0x3e4 [ 637.630891][ C1] netlink_sendmsg+0x856/0xd90 [ 637.630893][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 637.630896][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 637.630899][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 637.630902][ C1] sock_sendmsg+0xcf/0x120 [ 637.630904][ C1] ____sys_sendmsg+0x6e8/0x810 [ 637.630907][ C1] ? kernel_sendmsg+0x50/0x50 [ 637.630910][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 637.630913][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.630916][ C1] ? __lock_acquire+0xb92/0x5780 [ 637.630918][ C1] ___sys_sendmsg+0xf3/0x170 [ 637.630921][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 637.630924][ C1] ? __fget_files+0x272/0x400 [ 637.630927][ C1] ? lock_downgrade+0x830/0x830 [ 637.630930][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 637.630933][ C1] ? __fget_files+0x294/0x400 [ 637.630935][ C1] ? __fget_light+0xea/0x280 [ 637.630938][ C1] __sys_sendmsg+0xe5/0x1b0 [ 637.630941][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 637.630944][ C1] ? __x64_sys_futex+0x382/0x4e0 [ 637.630947][ C1] ? check_preemption_disabled+0x50/0x130 [ 637.630950][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 637.630953][ C1] do_syscall_64+0x2d/0x70 [ 637.630956][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.630958][ C1] RIP: 0033:0x446c49 [ 637.630967][ C1] Code: e8 bc 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 2b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 637.630971][ C1] RSP: 002b:00007f1e24348d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 637.630978][ C1] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446c49 [ 637.630982][ C1] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 [ 637.630986][ C1] RBP: 00000000006dbc30 R08: 000000000000000d R09: 0000000000000000 [ 637.630990][ C1] R10: 0000000000000050 R11: 0000000000000246 R12: 00000000006dbc3c [ 637.630994][ C1] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 637.633417][ T1125] Kernel panic - not syncing: hung_task: blocked tasks [ 638.247099][ T1125] CPU: 0 PID: 1125 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 638.255507][ T1125] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 638.265661][ T1125] Call Trace: [ 638.269218][ T1125] dump_stack+0x198/0x1fd [ 638.273606][ T1125] panic+0x382/0x7fb [ 638.277535][ T1125] ? __warn_printk+0xf3/0xf3 [ 638.282138][ T1125] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 638.287782][ T1125] ? preempt_schedule_thunk+0x16/0x18 [ 638.294692][ T1125] ? watchdog.cold+0x5/0x16b [ 638.299526][ T1125] ? watchdog+0xa82/0x1000 [ 638.304222][ T1125] watchdog.cold+0x16/0x16b [ 638.309521][ T1125] ? reset_hung_task_detector+0x30/0x30 [ 638.315760][ T1125] kthread+0x3b5/0x4a0 [ 638.320412][ T1125] ? __kthread_bind_mask+0xc0/0xc0 [ 638.326748][ T1125] ret_from_fork+0x1f/0x30 [ 638.333354][ T1125] Kernel Offset: disabled [ 638.337959][ T1125] Rebooting in 86400 seconds..