Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 606.442267][ T8535] IPVS: ftp: loaded support on port[0] = 21 [ 865.337120][ T1660] INFO: task kworker/1:0:8527 blocked for more than 143 seconds. [ 865.345200][ T1660] Not tainted 5.11.0-rc3-syzkaller #0 [ 865.354727][ T1660] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 865.364675][ T1660] task:kworker/1:0 state:D stack:29448 pid: 8527 ppid: 2 flags:0x00004000 [ 865.375113][ T1660] Workqueue: ipv6_addrconf addrconf_verify_work [ 865.382509][ T1660] Call Trace: [ 865.385817][ T1660] __schedule+0x90c/0x21a0 [ 865.392689][ T1660] ? io_schedule_timeout+0x140/0x140 [ 865.399218][ T1660] ? _raw_spin_unlock_irq+0x1f/0x40 [ 865.404445][ T1660] ? lockdep_hardirqs_on+0x79/0x100 [ 865.411151][ T1660] schedule+0xcf/0x270 [ 865.415288][ T1660] schedule_preempt_disabled+0xf/0x20 [ 865.422113][ T1660] __mutex_lock+0x81a/0x1110 [ 865.427706][ T1660] ? addrconf_verify_work+0xa/0x20 [ 865.432964][ T1660] ? mutex_lock_io_nested+0xf60/0xf60 [ 865.439828][ T1660] ? lock_release+0x710/0x710 [ 865.444552][ T1660] ? lock_downgrade+0x6d0/0x6d0 [ 865.450811][ T1660] addrconf_verify_work+0xa/0x20 [ 865.455798][ T1660] process_one_work+0x98d/0x15f0 [ 865.462288][ T1660] ? pwq_dec_nr_in_flight+0x320/0x320 [ 865.468704][ T1660] ? rwlock_bug.part.0+0x90/0x90 [ 865.473678][ T1660] ? _raw_spin_lock_irq+0x41/0x50 [ 865.481304][ T1660] worker_thread+0x64c/0x1120 [ 865.486037][ T1660] ? __kthread_parkme+0x13f/0x1e0 [ 865.492423][ T1660] ? process_one_work+0x15f0/0x15f0 [ 865.498580][ T1660] kthread+0x3b1/0x4a0 [ 865.502677][ T1660] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 865.509889][ T1660] ret_from_fork+0x1f/0x30 [ 865.514452][ T1660] [ 865.514452][ T1660] Showing all locks held in the system: [ 865.523772][ T1660] 1 lock held by khungtaskd/1660: [ 865.529822][ T1660] #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 865.542064][ T1660] 1 lock held by in:imklog/8248: [ 865.548090][ T1660] #0: ffff88801846c870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 865.558333][ T1660] 3 locks held by kworker/1:0/8527: [ 865.563548][ T1660] #0: ffff888147500538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 865.576099][ T1660] #1: ffffc90001b9fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 865.587460][ T1660] #2: ffffffff8ca586a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 865.597974][ T1660] 2 locks held by syz-executor979/8558: [ 865.603606][ T1660] [ 865.605933][ T1660] ============================================= [ 865.605933][ T1660] [ 865.617658][ T1660] NMI backtrace for cpu 1 [ 865.622178][ T1660] CPU: 1 PID: 1660 Comm: khungtaskd Not tainted 5.11.0-rc3-syzkaller #0 [ 865.630521][ T1660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.640601][ T1660] Call Trace: [ 865.643900][ T1660] dump_stack+0x107/0x163 [ 865.648277][ T1660] nmi_cpu_backtrace.cold+0x44/0xd7 [ 865.653497][ T1660] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.658714][ T1660] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 865.664815][ T1660] watchdog+0xd43/0xfa0 [ 865.668994][ T1660] ? reset_hung_task_detector+0x30/0x30 [ 865.674560][ T1660] kthread+0x3b1/0x4a0 [ 865.678646][ T1660] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 865.684561][ T1660] ret_from_fork+0x1f/0x30 [ 865.689188][ T1660] Sending NMI from CPU 1 to CPUs 0: [ 865.695475][ C0] NMI backtrace for cpu 0 [ 865.695485][ C0] CPU: 0 PID: 8558 Comm: syz-executor979 Not tainted 5.11.0-rc3-syzkaller #0 [ 865.695495][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.695504][ C0] RIP: 0010:__mutex_lock+0x2/0x1110 [ 865.695515][ C0] Code: 48 c7 c7 58 ab 03 8d e8 7c 51 ba f8 e9 9a fc ff ff e8 02 52 ba f8 e9 9d fd ff ff e8 f8 51 ba f8 e9 60 fd ff ff 0f 1f 00 41 57 <41> 56 41 55 49 bd 00 00 00 00 00 fc ff df 41 54 41 89 d4 31 d2 55 [ 865.695532][ C0] RSP: 0018:ffffc9000134ed30 EFLAGS: 00000246 [ 865.695545][ C0] RAX: 0000000000000000 RBX: fffffffffffffff0 RCX: 0000000000000000 [ 865.695554][ C0] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888024cb9c00 [ 865.695563][ C0] RBP: ffffc9000134edf8 R08: ffffffff871610d8 R09: ffff888024cb9c07 [ 865.695571][ C0] R10: ffffed1004997380 R11: 0000000000000000 R12: ffffc9000134ef80 [ 865.695580][ C0] R13: 0000000000000001 R14: ffff888024cb9c00 R15: ffff888024cb9c90 [ 865.695589][ C0] FS: 00000000025bd880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 865.695598][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 865.695606][ C0] CR2: 00007ffdf796f460 CR3: 0000000010dc3000 CR4: 00000000001506f0 [ 865.695614][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 865.695623][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 865.695630][ C0] Call Trace: [ 865.695635][ C0] tcf_idr_check_alloc+0x78/0x3b0 [ 865.695640][ C0] tcf_police_init+0x34f/0x1460 [ 865.695646][ C0] ? tcf_police_cleanup+0x60/0x60 [ 865.695652][ C0] ? find_held_lock+0x2d/0x110 [ 865.695657][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 865.695663][ C0] ? kernel_text_address+0xbd/0xf0 [ 865.695669][ C0] tcf_action_init_1+0x1a3/0x990 [ 865.695675][ C0] ? tcf_action_dump_old+0x80/0x80 [ 865.695681][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 865.695687][ C0] ? kasan_save_stack+0x32/0x40 [ 865.695693][ C0] ? kasan_save_stack+0x32/0x40 [ 865.695698][ C0] ? kasan_save_stack+0x1b/0x40 [ 865.695704][ C0] ? ____kasan_kmalloc.constprop.0+0x82/0xa0 [ 865.695711][ C0] ? fw_change+0x91b/0x13e0 [ 865.695716][ C0] ? rtnetlink_rcv_msg+0x80e/0xad0 [ 865.695722][ C0] ? netlink_rcv_skb+0x153/0x420 [ 865.695728][ C0] ? netlink_unicast+0x533/0x7d0 [ 865.695733][ C0] ? netlink_sendmsg+0x856/0xd90 [ 865.695739][ C0] ? sock_sendmsg+0xcf/0x120 [ 865.695744][ C0] ? ____sys_sendmsg+0x331/0x810 [ 865.695750][ C0] tcf_exts_validate+0x138/0x420 [ 865.695756][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 865.695761][ C0] fw_set_parms+0x13d/0xaa0 [ 865.695766][ C0] ? fw_delete+0x8c0/0x8c0 [ 865.695772][ C0] ? unpoison_range+0x3a/0x60 [ 865.695777][ C0] fw_change+0xa30/0x13e0 [ 865.695782][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 865.695788][ C0] ? fw_set_parms+0xaa0/0xaa0 [ 865.695793][ C0] ? tc_new_tfilter+0x132a/0x2120 [ 865.695799][ C0] tc_new_tfilter+0x1394/0x2120 [ 865.695804][ C0] ? fw_set_parms+0xaa0/0xaa0 [ 865.695810][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.695815][ C0] ? lock_chain_count+0x20/0x20 [ 865.695821][ C0] ? kernel_text_address+0xbd/0xf0 [ 865.695826][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.695832][ C0] rtnetlink_rcv_msg+0x80e/0xad0 [ 865.695838][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 865.695844][ C0] netlink_rcv_skb+0x153/0x420 [ 865.695850][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 865.695855][ C0] ? netlink_ack+0xaa0/0xaa0 [ 865.695861][ C0] ? netlink_deliver_tap+0x227/0xb70 [ 865.695867][ C0] netlink_unicast+0x533/0x7d0 [ 865.695872][ C0] ? netlink_attachskb+0x870/0x870 [ 865.695878][ C0] ? _copy_from_iter_full+0x275/0x850 [ 865.695885][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.695891][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 865.695897][ C0] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 865.695903][ C0] ? __check_object_size+0x171/0x3f0 [ 865.695909][ C0] netlink_sendmsg+0x856/0xd90 [ 865.695915][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 865.695921][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.695927][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 865.695932][ C0] sock_sendmsg+0xcf/0x120 [ 865.695943][ C0] ____sys_sendmsg+0x331/0x810 [ 865.695948][ C0] ? kernel_sendmsg+0x50/0x50 [ 865.695953][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 865.695959][ C0] ? __lock_acquire+0x16c2/0x54f0 [ 865.695964][ C0] ___sys_sendmsg+0xf3/0x170 [ 865.695970][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 865.695976][ C0] ? find_held_lock+0x2d/0x110 [ 865.695981][ C0] ? __might_fault+0xd3/0x180 [ 865.695987][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 865.695993][ C0] __sys_sendmmsg+0x195/0x470 [ 865.695998][ C0] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 865.696004][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.696011][ C0] ? sockfd_lookup_light+0xc5/0x180 [ 865.696017][ C0] ? __sys_sendmsg+0x10c/0x1b0 [ 865.696022][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 865.696028][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.696035][ C0] __x64_sys_sendmmsg+0x99/0x100 [ 865.696041][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 865.696047][ C0] do_syscall_64+0x2d/0x70 [ 865.696052][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.696058][ C0] RIP: 0033:0x441739 [ 865.696068][ 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 [ 865.696084][ C0] RSP: 002b:00007ffdf796f458 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 865.696098][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441739 [ 865.696107][ C0] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 865.696116][ C0] RBP: 00007ffdf796f460 R08: 0000000100000000 R09: 0000000100000000 [ 865.696124][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000009416c [ 865.696133][ C0] R13: 0000000000402610 R14: 0000000000000000 R15: 0000000000000000 [ 865.696142][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.033 msecs [ 865.706818][ T1660] Kernel panic - not syncing: hung_task: blocked tasks [ 866.287584][ T1660] CPU: 1 PID: 1660 Comm: khungtaskd Not tainted 5.11.0-rc3-syzkaller #0 [ 866.295926][ T1660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 866.305987][ T1660] Call Trace: [ 866.309279][ T1660] dump_stack+0x107/0x163 [ 866.313636][ T1660] panic+0x306/0x73d [ 866.317588][ T1660] ? __warn_printk+0xf3/0xf3 [ 866.322205][ T1660] ? lapic_can_unplug_cpu+0x80/0x80 [ 866.327419][ T1660] ? preempt_schedule_thunk+0x16/0x18 [ 866.332809][ T1660] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 866.339024][ T1660] ? watchdog.cold+0x5/0x158 [ 866.343630][ T1660] watchdog.cold+0x16/0x158 [ 866.348151][ T1660] ? reset_hung_task_detector+0x30/0x30 [ 866.353714][ T1660] kthread+0x3b1/0x4a0 [ 866.357790][ T1660] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 866.364061][ T1660] ret_from_fork+0x1f/0x30 [ 866.369448][ T1660] Kernel Offset: disabled [ 866.373834][ T1660] Rebooting in 86400 seconds..