Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 504.646197][ T8465] IPVS: ftp: loaded support on port[0] = 21 executing program [ 504.692644][ T8487] netlink: 28 bytes leftover after parsing attributes in process `syz-executor640'. [ 504.702756][ T8487] netlink: 2224 bytes leftover after parsing attributes in process `syz-executor640'. [ 504.718448][ T8488] netlink: 28 bytes leftover after parsing attributes in process `syz-executor640'. [ 504.728063][ T8488] netlink: 2224 bytes leftover after parsing attributes in process `syz-executor640'. [ 721.667526][ T1657] INFO: task kworker/0:2:2999 blocked for more than 143 seconds. [ 721.675534][ T1657] Not tainted 5.11.0-rc6-syzkaller #0 [ 721.683561][ T1657] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.692969][ T1657] task:kworker/0:2 state:D stack:26432 pid: 2999 ppid: 2 flags:0x00004000 [ 721.702889][ T1657] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.710067][ T1657] Call Trace: [ 721.713414][ T1657] __schedule+0x90c/0x21a0 [ 721.720192][ T1657] ? io_schedule_timeout+0x140/0x140 [ 721.725516][ T1657] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.731951][ T1657] ? lockdep_hardirqs_on+0x79/0x100 [ 721.737246][ T1657] schedule+0xcf/0x270 [ 721.742383][ T1657] schedule_preempt_disabled+0xf/0x20 [ 721.748467][ T1657] __mutex_lock+0x81a/0x1110 [ 721.753094][ T1657] ? addrconf_verify_work+0xa/0x20 [ 721.759243][ T1657] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.764651][ T1657] ? lock_release+0x710/0x710 [ 721.770556][ T1657] ? lock_downgrade+0x6d0/0x6d0 [ 721.775456][ T1657] addrconf_verify_work+0xa/0x20 [ 721.782253][ T1657] process_one_work+0x98d/0x15f0 [ 721.788044][ T1657] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.793456][ T1657] ? rwlock_bug.part.0+0x90/0x90 [ 721.799453][ T1657] ? _raw_spin_lock_irq+0x41/0x50 [ 721.804534][ T1657] worker_thread+0x64c/0x1120 [ 721.810295][ T1657] ? __kthread_parkme+0x13f/0x1e0 [ 721.815348][ T1657] ? process_one_work+0x15f0/0x15f0 [ 721.821921][ T1657] kthread+0x3b1/0x4a0 [ 721.826027][ T1657] ? __kthread_bind_mask+0xc0/0xc0 [ 721.832362][ T1657] ret_from_fork+0x1f/0x30 [ 721.837053][ T1657] [ 721.837053][ T1657] Showing all locks held in the system: [ 721.845885][ T1657] 1 lock held by khungtaskd/1657: [ 721.853719][ T1657] #0: ffffffff8bd73da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.864312][ T1657] 3 locks held by kworker/0:2/2999: [ 721.870146][ T1657] #0: ffff888147d7b938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 721.881895][ T1657] #1: ffffc90001b8fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 721.892917][ T1657] #2: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 721.903076][ T1657] 1 lock held by in:imklog/8181: [ 721.908819][ T1657] #0: ffff888012caaff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.918701][ T1657] 1 lock held by syz-executor640/8488: [ 721.924205][ T1657] [ 721.926535][ T1657] ============================================= [ 721.926535][ T1657] [ 721.936702][ T1657] NMI backtrace for cpu 0 [ 721.941145][ T1657] CPU: 0 PID: 1657 Comm: khungtaskd Not tainted 5.11.0-rc6-syzkaller #0 [ 721.949479][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.959725][ T1657] Call Trace: [ 721.963010][ T1657] dump_stack+0x107/0x163 [ 721.967449][ T1657] nmi_cpu_backtrace.cold+0x44/0xd7 [ 721.972664][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.978007][ T1657] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.984079][ T1657] watchdog+0xd43/0xfa0 [ 721.988338][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 721.993901][ T1657] kthread+0x3b1/0x4a0 [ 721.997981][ T1657] ? __kthread_bind_mask+0xc0/0xc0 [ 722.003104][ T1657] ret_from_fork+0x1f/0x30 [ 722.007714][ T1657] Sending NMI from CPU 0 to CPUs 1: [ 722.014361][ C1] NMI backtrace for cpu 1 [ 722.014371][ C1] CPU: 1 PID: 8488 Comm: syz-executor640 Not tainted 5.11.0-rc6-syzkaller #0 [ 722.014381][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.014390][ C1] RIP: 0010:__lock_acquire+0x4af/0x54f0 [ 722.014401][ C1] Code: 0f 83 36 0c 00 00 4b 8d 04 7f 48 c1 e0 06 48 05 c0 6b 86 8f 48 ba 00 00 00 00 00 fc ff df 48 8b 0c 24 48 c1 e9 03 0f b6 14 11 <84> d2 74 09 80 fa 03 0f 8e 64 10 00 00 8b b5 80 09 00 00 85 f6 0f [ 722.014417][ C1] RSP: 0018:ffffc9000176eb10 EFLAGS: 00000802 [ 722.014429][ C1] RAX: ffffffff8f8b2100 RBX: 0000000000000001 RCX: 1ffff1100413b4a8 [ 722.014438][ C1] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f866868 [ 722.014447][ C1] RBP: ffff8880209d9bc0 R08: 0000000000000000 R09: ffffffff8f86686f [ 722.014455][ C1] R10: fffffbfff1f0cd0d R11: 0000000000000000 R12: ffff8880209da570 [ 722.014464][ C1] R13: 0000000000000003 R14: ffff888014fe6a68 R15: 0000000000000647 [ 722.014473][ C1] FS: 0000000001ae1300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 722.014482][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 722.014490][ C1] CR2: 00007ffd298bb8b8 CR3: 0000000026573000 CR4: 00000000001506e0 [ 722.014499][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 722.014507][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 722.014515][ C1] Call Trace: [ 722.014520][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.014526][ C1] ? sched_clock+0x2a/0x40 [ 722.014531][ C1] ? sched_clock_cpu+0x18/0x1f0 [ 722.014537][ C1] ? kvm_sched_clock_read+0x14/0x40 [ 722.014542][ C1] lock_acquire+0x1a8/0x720 [ 722.014548][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 722.014553][ C1] ? lock_release+0x710/0x710 [ 722.014559][ C1] __mutex_lock+0x134/0x1110 [ 722.014565][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 722.014570][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 722.014576][ C1] ? mark_held_locks+0x9f/0xe0 [ 722.014582][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 722.014588][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 722.014594][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 722.014601][ C1] ? wait_for_completion_io+0x260/0x260 [ 722.014607][ C1] ? __radix_tree_lookup+0x211/0x2a0 [ 722.014613][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 722.014619][ C1] tcf_police_init+0x34f/0x1460 [ 722.014624][ C1] ? tcf_police_cleanup+0x60/0x60 [ 722.014630][ C1] ? find_held_lock+0x2d/0x110 [ 722.014636][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 722.014641][ C1] tcf_action_init_1+0x63b/0x990 [ 722.014647][ C1] ? tcf_action_dump_old+0x80/0x80 [ 722.014653][ C1] tcf_action_init+0x265/0x4b0 [ 722.014658][ C1] ? tcf_action_init_1+0x990/0x990 [ 722.014664][ C1] ? lock_chain_count+0x20/0x20 [ 722.014670][ C1] ? __lock_acquire+0x16c2/0x54f0 [ 722.014675][ C1] tcf_action_add+0xd9/0x360 [ 722.014681][ C1] ? tca_action_gd+0xe20/0xe20 [ 722.014687][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.014693][ C1] ? __nla_parse+0x3d/0x50 [ 722.014698][ C1] tc_ctl_action+0x33a/0x440 [ 722.014704][ C1] ? tcf_action_add+0x360/0x360 [ 722.014709][ C1] ? rtnetlink_rcv_msg+0x3c3/0xad0 [ 722.014715][ C1] ? tcf_action_add+0x360/0x360 [ 722.014721][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 722.014726][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 722.014732][ C1] netlink_rcv_skb+0x153/0x420 [ 722.014738][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 722.014744][ C1] ? netlink_ack+0xaa0/0xaa0 [ 722.014749][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 722.014755][ C1] netlink_unicast+0x533/0x7d0 [ 722.014761][ C1] ? netlink_attachskb+0x870/0x870 [ 722.014767][ C1] ? _copy_from_iter_full+0x275/0x850 [ 722.014773][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.014780][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 722.014786][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.014792][ C1] ? __check_object_size+0x171/0x3f0 [ 722.014798][ C1] netlink_sendmsg+0x856/0xd90 [ 722.014803][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.014809][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.014816][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.014822][ C1] sock_sendmsg+0xcf/0x120 [ 722.014827][ C1] ____sys_sendmsg+0x6e8/0x810 [ 722.014832][ C1] ? kernel_sendmsg+0x50/0x50 [ 722.014843][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 722.014849][ C1] ? fs_reclaim_release+0x9c/0xe0 [ 722.014854][ C1] ___sys_sendmsg+0xf3/0x170 [ 722.014860][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.014866][ C1] ? lockdep_init_map_waits+0x26a/0x720 [ 722.014872][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.014879][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.014886][ C1] ? percpu_counter_add_batch+0xbd/0x180 [ 722.014892][ C1] ? find_held_lock+0x2d/0x110 [ 722.014897][ C1] ? fd_install+0x1e3/0x640 [ 722.014903][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 722.014909][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.014915][ C1] ? __fget_light+0x215/0x280 [ 722.014921][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.014927][ C1] __sys_sendmsg+0xe5/0x1b0 [ 722.014931][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 722.014937][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 722.014942][ C1] do_syscall_64+0x2d/0x70 [ 722.014947][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 722.014952][ C1] RIP: 0033:0x440329 [ 722.014961][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 722.014975][ C1] RSP: 002b:00007ffd298bb8d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 722.014987][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000440329 [ 722.014995][ C1] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000005 [ 722.015002][ C1] RBP: 0000000000000000 R08: 00000000004ab000 R09: 00000000004ab000 [ 722.015015][ C1] R10: 00000000004ab000 R11: 0000000000000246 R12: 000000000007b39b [ 722.015023][ C1] R13: 00007ffd298bb900 R14: 00007ffd298bb8f0 R15: 00007ffd298bb8e4 [ 722.015031][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.402 msecs [ 722.054553][ T1657] Kernel panic - not syncing: hung_task: blocked tasks [ 722.619388][ T1657] CPU: 0 PID: 1657 Comm: khungtaskd Not tainted 5.11.0-rc6-syzkaller #0 [ 722.627723][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.637788][ T1657] Call Trace: [ 722.641082][ T1657] dump_stack+0x107/0x163 [ 722.645430][ T1657] panic+0x306/0x73d [ 722.649376][ T1657] ? __warn_printk+0xf3/0xf3 [ 722.653992][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.659206][ T1657] ? preempt_schedule_thunk+0x16/0x18 [ 722.664592][ T1657] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 722.670761][ T1657] ? watchdog.cold+0x5/0x158 [ 722.675397][ T1657] watchdog.cold+0x16/0x158 [ 722.679917][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 722.685488][ T1657] kthread+0x3b1/0x4a0 [ 722.689567][ T1657] ? __kthread_bind_mask+0xc0/0xc0 [ 722.694692][ T1657] ret_from_fork+0x1f/0x30 [ 722.699797][ T1657] Kernel Offset: disabled [ 722.704273][ T1657] Rebooting in 86400 seconds..