Warning: Permanently added '10.128.0.184' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 624.189706][ T8478] IPVS: ftp: loaded support on port[0] = 21 [ 624.232901][ T8499] netlink: 1028 bytes leftover after parsing attributes in process `syz-executor710'. [ 624.243585][ T8499] netlink: 1028 bytes leftover after parsing attributes in process `syz-executor710'. [ 864.784813][ T1641] INFO: task kworker/1:1:8470 blocked for more than 143 seconds. [ 864.792711][ T1641] Not tainted 5.11.0-rc2-syzkaller #0 [ 864.800596][ T1641] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 864.810098][ T1641] task:kworker/1:1 state:D stack:29448 pid: 8470 ppid: 2 flags:0x00004000 [ 864.820117][ T1641] Workqueue: ipv6_addrconf addrconf_verify_work [ 864.827643][ T1641] Call Trace: [ 864.830988][ T1641] __schedule+0x90c/0x21a0 [ 864.836578][ T1641] ? io_schedule_timeout+0x140/0x140 [ 864.841888][ T1641] ? _raw_spin_unlock_irq+0x1f/0x40 [ 864.848652][ T1641] ? lockdep_hardirqs_on+0x79/0x100 [ 864.853901][ T1641] schedule+0xcf/0x270 [ 864.859109][ T1641] schedule_preempt_disabled+0xf/0x20 [ 864.864863][ T1641] __mutex_lock+0x81a/0x1110 [ 864.869488][ T1641] ? addrconf_verify_work+0xa/0x20 [ 864.876137][ T1641] ? mutex_lock_io_nested+0xf60/0xf60 [ 864.881534][ T1641] ? lock_release+0x710/0x710 [ 864.886731][ T1641] ? lock_downgrade+0x6d0/0x6d0 [ 864.891620][ T1641] addrconf_verify_work+0xa/0x20 [ 864.896990][ T1641] process_one_work+0x98d/0x15f0 [ 864.902040][ T1641] ? pwq_dec_nr_in_flight+0x320/0x320 [ 864.907846][ T1641] ? rwlock_bug.part.0+0x90/0x90 [ 864.912816][ T1641] ? _raw_spin_lock_irq+0x41/0x50 [ 864.918218][ T1641] worker_thread+0x64c/0x1120 [ 864.922931][ T1641] ? __kthread_parkme+0x13f/0x1e0 [ 864.928373][ T1641] ? process_one_work+0x15f0/0x15f0 [ 864.933596][ T1641] kthread+0x3b1/0x4a0 [ 864.938024][ T1641] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 864.943943][ T1641] ret_from_fork+0x1f/0x30 [ 864.948934][ T1641] [ 864.948934][ T1641] Showing all locks held in the system: [ 864.957281][ T1641] 1 lock held by khungtaskd/1641: [ 864.962311][ T1641] #0: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 864.972924][ T1641] 1 lock held by in:imklog/8170: [ 864.978217][ T1641] #0: ffff88801808f270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 864.987786][ T1641] 3 locks held by kworker/1:1/8470: [ 864.992993][ T1641] #0: ffff8881475c9938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 865.004347][ T1641] #1: ffffc9000176fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 865.016195][ T1641] #2: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 865.025973][ T1641] 1 lock held by syz-executor710/8499: [ 865.031508][ T1641] [ 865.033836][ T1641] ============================================= [ 865.033836][ T1641] [ 865.042809][ T1641] NMI backtrace for cpu 1 [ 865.047224][ T1641] CPU: 1 PID: 1641 Comm: khungtaskd Not tainted 5.11.0-rc2-syzkaller #0 [ 865.055555][ T1641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.065610][ T1641] Call Trace: [ 865.068888][ T1641] dump_stack+0x107/0x163 [ 865.073269][ T1641] nmi_cpu_backtrace.cold+0x44/0xd7 [ 865.078490][ T1641] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.083768][ T1641] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 865.089799][ T1641] watchdog+0xd43/0xfa0 [ 865.094014][ T1641] ? reset_hung_task_detector+0x30/0x30 [ 865.099576][ T1641] kthread+0x3b1/0x4a0 [ 865.103649][ T1641] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 865.109551][ T1641] ret_from_fork+0x1f/0x30 [ 865.114089][ T1641] Sending NMI from CPU 1 to CPUs 0: [ 865.120742][ C0] NMI backtrace for cpu 0 [ 865.120751][ C0] CPU: 0 PID: 8499 Comm: syz-executor710 Not tainted 5.11.0-rc2-syzkaller #0 [ 865.120761][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.120771][ C0] RIP: 0010:check_preemption_disabled+0x9/0x150 [ 865.120782][ C0] Code: 04 31 ff 89 de 0f 1f 44 00 00 85 db 75 ae 0f 1f 44 00 00 41 bc 01 00 00 00 e8 e3 b3 cd fa eb 9f cc 41 56 41 55 49 89 f5 41 54 <55> 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 f5 d2 15 77 65 8b 1d 4e [ 865.120798][ C0] RSP: 0018:ffffc9000164ec38 EFLAGS: 00000282 [ 865.120809][ C0] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815886a1 [ 865.120818][ C0] RDX: 0000000000000001 RSI: ffffffff899e73e0 RDI: ffffffff899e7420 [ 865.120826][ C0] RBP: 1ffff920002c9d92 R08: 0000000000000000 R09: ffffffff8cef570f [ 865.120834][ C0] R10: fffffbfff19deae1 R11: 0000000000000000 R12: 0000000000000001 [ 865.120843][ C0] R13: ffffffff899e73e0 R14: 1ffff920002c9dad R15: ffff8880136fa400 [ 865.120852][ C0] FS: 0000000000921880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 865.120861][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 865.120868][ C0] CR2: 00007fa9daf14000 CR3: 00000000135be000 CR4: 00000000001506f0 [ 865.120876][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 865.120885][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 865.120891][ C0] Call Trace: [ 865.120896][ C0] rcu_lockdep_current_cpu_online+0x2d/0x150 [ 865.120902][ C0] rcu_read_lock_sched_held+0x25/0x70 [ 865.120908][ C0] lock_release+0x5b7/0x710 [ 865.120913][ C0] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 865.120918][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 865.120924][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 865.120929][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 865.120935][ C0] __mutex_unlock_slowpath+0x81/0x610 [ 865.120941][ C0] ? wait_for_completion_io+0x260/0x260 [ 865.120947][ C0] tcf_idr_check_alloc+0x29e/0x3b0 [ 865.120952][ C0] tcf_police_init+0x347/0x13a0 [ 865.120957][ C0] ? tcf_police_cleanup+0x60/0x60 [ 865.120963][ C0] ? find_held_lock+0x2d/0x110 [ 865.120968][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 865.120973][ C0] ? stack_trace_save+0x8c/0xc0 [ 865.120979][ C0] tcf_action_init_1+0x1a3/0x990 [ 865.120984][ C0] ? tcf_action_dump_old+0x80/0x80 [ 865.120989][ C0] ? ____sys_sendmsg+0x331/0x810 [ 865.120995][ C0] ? ___sys_sendmsg+0xf3/0x170 [ 865.121000][ C0] ? __sys_sendmmsg+0x195/0x470 [ 865.121005][ C0] ? __x64_sys_sendmmsg+0x99/0x100 [ 865.121010][ C0] ? do_syscall_64+0x2d/0x70 [ 865.121016][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.121022][ C0] ? find_held_lock+0x2d/0x110 [ 865.121027][ C0] tcf_exts_validate+0x138/0x420 [ 865.121032][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 865.121038][ C0] ? unpoison_range+0x3a/0x60 [ 865.121043][ C0] route4_change+0x6d8/0x2380 [ 865.121048][ C0] ? tc_new_tfilter+0x1b51/0x2120 [ 865.121053][ C0] ? route4_delete+0xb70/0xb70 [ 865.121058][ C0] ? tc_new_tfilter+0x132a/0x2120 [ 865.121063][ C0] tc_new_tfilter+0x1394/0x2120 [ 865.121069][ C0] ? route4_delete+0xb70/0xb70 [ 865.121074][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.121079][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.121085][ C0] rtnetlink_rcv_msg+0x80e/0xad0 [ 865.121090][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 865.121096][ C0] netlink_rcv_skb+0x153/0x420 [ 865.121101][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 865.121107][ C0] ? netlink_ack+0xaa0/0xaa0 [ 865.121112][ C0] ? netlink_deliver_tap+0x227/0xb70 [ 865.121117][ C0] netlink_unicast+0x533/0x7d0 [ 865.121123][ C0] ? netlink_attachskb+0x870/0x870 [ 865.121128][ C0] ? _copy_from_iter_full+0x275/0x850 [ 865.121134][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.121140][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 865.121146][ C0] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 865.121152][ C0] ? __check_object_size+0x171/0x3f0 [ 865.121157][ C0] netlink_sendmsg+0x856/0xd90 [ 865.121162][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 865.121168][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.121174][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 865.121179][ C0] sock_sendmsg+0xcf/0x120 [ 865.121184][ C0] ____sys_sendmsg+0x331/0x810 [ 865.121189][ C0] ? kernel_sendmsg+0x50/0x50 [ 865.121194][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 865.121199][ C0] ? __lock_acquire+0x16b7/0x5500 [ 865.121204][ C0] ___sys_sendmsg+0xf3/0x170 [ 865.121210][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 865.121215][ C0] ? find_held_lock+0x2d/0x110 [ 865.121220][ C0] ? __might_fault+0xd3/0x180 [ 865.121225][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 865.121231][ C0] __sys_sendmmsg+0x195/0x470 [ 865.121236][ C0] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 865.121241][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.121248][ C0] ? sockfd_lookup_light+0xc5/0x180 [ 865.121253][ C0] ? __sys_sendmsg+0x10c/0x1b0 [ 865.121258][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 865.121264][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.121270][ C0] __x64_sys_sendmmsg+0x99/0x100 [ 865.121276][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 865.121282][ C0] do_syscall_64+0x2d/0x70 [ 865.121287][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.121293][ C0] RIP: 0033:0x441609 [ 865.121302][ C0] Code: e8 5c ad 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 bb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 865.121318][ C0] RSP: 002b:00007ffd34e66718 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 865.121329][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441609 [ 865.121336][ C0] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 865.121344][ C0] RBP: 00007ffd34e66720 R08: 0000000120080522 R09: 0000000120080522 [ 865.121356][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2990 [ 865.121364][ C0] R13: 00000000004024e0 R14: 0000000000000000 R15: 0000000000000000 [ 865.121371][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.388 msecs [ 865.157641][ T1641] Kernel panic - not syncing: hung_task: blocked tasks [ 865.715649][ T1641] CPU: 1 PID: 1641 Comm: khungtaskd Not tainted 5.11.0-rc2-syzkaller #0 [ 865.723981][ T1641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.734034][ T1641] Call Trace: [ 865.737314][ T1641] dump_stack+0x107/0x163 [ 865.741663][ T1641] panic+0x306/0x73d [ 865.745599][ T1641] ? __warn_printk+0xf3/0xf3 [ 865.750204][ T1641] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.755406][ T1641] ? preempt_schedule_thunk+0x16/0x18 [ 865.760784][ T1641] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 865.766954][ T1641] ? watchdog.cold+0x5/0x158 [ 865.771578][ T1641] watchdog.cold+0x16/0x158 [ 865.776096][ T1641] ? reset_hung_task_detector+0x30/0x30 [ 865.781659][ T1641] kthread+0x3b1/0x4a0 [ 865.785733][ T1641] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 865.791640][ T1641] ret_from_fork+0x1f/0x30 [ 865.796900][ T1641] Kernel Offset: disabled [ 865.801285][ T1641] Rebooting in 86400 seconds..