Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 487.166543][ T8477] IPVS: ftp: loaded support on port[0] = 21 [ 715.726231][ T1656] INFO: task kworker/0:0:5 blocked for more than 143 seconds. [ 715.733951][ T1656] Not tainted 5.11.0-rc4-syzkaller #0 [ 715.742489][ T1656] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 715.751897][ T1656] task:kworker/0:0 state:D stack:26584 pid: 5 ppid: 2 flags:0x00004000 [ 715.762085][ T1656] Workqueue: ipv6_addrconf addrconf_verify_work [ 715.769109][ T1656] Call Trace: [ 715.772393][ T1656] __schedule+0x90c/0x21a0 [ 715.777787][ T1656] ? io_schedule_timeout+0x140/0x140 [ 715.783083][ T1656] ? _raw_spin_unlock_irq+0x1f/0x40 [ 715.789129][ T1656] ? lockdep_hardirqs_on+0x79/0x100 [ 715.794340][ T1656] schedule+0xcf/0x270 [ 715.799192][ T1656] schedule_preempt_disabled+0xf/0x20 [ 715.804572][ T1656] __mutex_lock+0x81a/0x1110 [ 715.810019][ T1656] ? addrconf_verify_work+0xa/0x20 [ 715.815143][ T1656] ? mutex_lock_io_nested+0xf60/0xf60 [ 715.821252][ T1656] ? lock_release+0x710/0x710 [ 715.826111][ T1656] ? lock_downgrade+0x6d0/0x6d0 [ 715.831896][ T1656] addrconf_verify_work+0xa/0x20 [ 715.837440][ T1656] process_one_work+0x98d/0x15f0 [ 715.842395][ T1656] ? pwq_dec_nr_in_flight+0x320/0x320 [ 715.848632][ T1656] ? rwlock_bug.part.0+0x90/0x90 [ 715.853582][ T1656] ? _raw_spin_lock_irq+0x41/0x50 [ 715.859499][ T1656] worker_thread+0x64c/0x1120 [ 715.864195][ T1656] ? process_one_work+0x15f0/0x15f0 [ 715.871087][ T1656] kthread+0x3b1/0x4a0 [ 715.875187][ T1656] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 715.881865][ T1656] ret_from_fork+0x1f/0x30 [ 715.887053][ T1656] [ 715.887053][ T1656] Showing all locks held in the system: [ 715.894764][ T1656] 3 locks held by kworker/0:0/5: [ 715.900531][ T1656] #0: ffff8881475c7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 715.912606][ T1656] #1: ffffc90000ca7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 715.923652][ T1656] #2: ffffffff8ca58aa8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 715.934448][ T1656] 1 lock held by khungtaskd/1656: [ 715.940169][ T1656] #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 715.950597][ T1656] 1 lock held by in:imklog/8168: [ 715.955529][ T1656] #0: ffff8880124e74f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 715.965511][ T1656] 2 locks held by syz-executor312/8498: [ 715.971834][ T1656] [ 715.974155][ T1656] ============================================= [ 715.974155][ T1656] [ 715.983459][ T1656] NMI backtrace for cpu 0 [ 715.987893][ T1656] CPU: 0 PID: 1656 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 715.996214][ T1656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.006259][ T1656] Call Trace: [ 716.009528][ T1656] dump_stack+0x107/0x163 [ 716.013860][ T1656] nmi_cpu_backtrace.cold+0x44/0xd7 [ 716.019057][ T1656] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.024253][ T1656] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 716.030436][ T1656] watchdog+0xd43/0xfa0 [ 716.034597][ T1656] ? reset_hung_task_detector+0x30/0x30 [ 716.040429][ T1656] kthread+0x3b1/0x4a0 [ 716.044504][ T1656] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 716.050418][ T1656] ret_from_fork+0x1f/0x30 [ 716.054986][ T1656] Sending NMI from CPU 0 to CPUs 1: [ 716.061064][ C1] NMI backtrace for cpu 1 [ 716.061072][ C1] CPU: 1 PID: 8498 Comm: syz-executor312 Not tainted 5.11.0-rc4-syzkaller #0 [ 716.061080][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.061087][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 [ 716.061095][ C1] Code: 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 00 fd ff ff 66 0f 1f 84 00 00 00 00 00 65 8b 05 39 25 8f 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9 00 01 ff 00 74 0e [ 716.061106][ C1] RSP: 0018:ffffc9000165ecd8 EFLAGS: 00000293 [ 716.061116][ C1] RAX: 0000000080000000 RBX: ffff8880161e7600 RCX: 0000000080000000 [ 716.061122][ C1] RDX: 0000000000000000 RSI: ffffffff83d8f2be RDI: 0000000000000003 [ 716.061128][ C1] RBP: dffffc0000000000 R08: 0000000000000002 R09: 000000000000001e [ 716.061134][ C1] R10: ffffffff83d8f2af R11: 000000000000003f R12: 1ffff11002c3cec0 [ 716.061141][ C1] R13: 000000000000001e R14: 00000000f0000000 R15: ffff8880151056d8 [ 716.061147][ C1] FS: 000000000169d880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 716.061153][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.061159][ C1] CR2: 00007f85b2dc9010 CR3: 000000001135e000 CR4: 0000000000350ee0 [ 716.061164][ C1] Call Trace: [ 716.061167][ C1] __radix_tree_lookup+0x14e/0x2a0 [ 716.061171][ C1] tcf_idr_check_alloc+0xb0/0x3b0 [ 716.061175][ C1] tcf_police_init+0x34f/0x1460 [ 716.061179][ C1] ? tcf_police_cleanup+0x60/0x60 [ 716.061183][ C1] ? find_held_lock+0x2d/0x110 [ 716.061187][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 716.061191][ C1] tcf_action_init_1+0x1a3/0x990 [ 716.061195][ C1] ? tcf_action_dump_old+0x80/0x80 [ 716.061199][ C1] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 716.061204][ C1] ? stack_depot_save+0x23c/0x4e0 [ 716.061208][ C1] ? kasan_save_stack+0x32/0x40 [ 716.061212][ C1] ? kasan_save_stack+0x32/0x40 [ 716.061216][ C1] ? kasan_save_stack+0x1b/0x40 [ 716.061220][ C1] ? ____kasan_kmalloc.constprop.0+0x82/0xa0 [ 716.061224][ C1] ? fw_change+0x4b5/0x13e0 [ 716.061228][ C1] ? rtnetlink_rcv_msg+0x80e/0xad0 [ 716.061232][ C1] ? netlink_rcv_skb+0x153/0x420 [ 716.061236][ C1] ? netlink_unicast+0x533/0x7d0 [ 716.061240][ C1] ? netlink_sendmsg+0x856/0xd90 [ 716.061244][ C1] ? sock_sendmsg+0xcf/0x120 [ 716.061248][ C1] ? ____sys_sendmsg+0x331/0x810 [ 716.061252][ C1] tcf_exts_validate+0x138/0x420 [ 716.061256][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 716.061259][ C1] fw_set_parms+0x13d/0xaa0 [ 716.061263][ C1] ? fw_delete+0x8c0/0x8c0 [ 716.061267][ C1] ? unpoison_range+0x3a/0x60 [ 716.061270][ C1] fw_change+0x57e/0x13e0 [ 716.061274][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 716.061278][ C1] ? fw_set_parms+0xaa0/0xaa0 [ 716.061282][ C1] ? tc_new_tfilter+0x132a/0x2120 [ 716.061286][ C1] tc_new_tfilter+0x1394/0x2120 [ 716.061290][ C1] ? fw_set_parms+0xaa0/0xaa0 [ 716.061294][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 716.061298][ C1] ? lock_chain_count+0x20/0x20 [ 716.061302][ C1] ? kernel_text_address+0xbd/0xf0 [ 716.061306][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 716.061310][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 716.061314][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 716.061318][ C1] netlink_rcv_skb+0x153/0x420 [ 716.061322][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 716.061326][ C1] ? netlink_ack+0xaa0/0xaa0 [ 716.061330][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 716.061334][ C1] netlink_unicast+0x533/0x7d0 [ 716.061338][ C1] ? netlink_attachskb+0x870/0x870 [ 716.061342][ C1] ? _copy_from_iter_full+0x275/0x850 [ 716.061346][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 716.061350][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 716.061354][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 716.061359][ C1] ? __check_object_size+0x171/0x3f0 [ 716.061363][ C1] netlink_sendmsg+0x856/0xd90 [ 716.061366][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 716.061371][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.061375][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 716.061379][ C1] sock_sendmsg+0xcf/0x120 [ 716.061382][ C1] ____sys_sendmsg+0x331/0x810 [ 716.061386][ C1] ? kernel_sendmsg+0x50/0x50 [ 716.061390][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 716.061393][ C1] ? __lock_acquire+0x16c2/0x54f0 [ 716.061397][ C1] ___sys_sendmsg+0xf3/0x170 [ 716.061401][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 716.061405][ C1] ? find_held_lock+0x2d/0x110 [ 716.061408][ C1] ? __might_fault+0xd3/0x180 [ 716.061412][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 716.061416][ C1] __sys_sendmmsg+0x195/0x470 [ 716.061420][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 716.061424][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 716.061428][ C1] ? sockfd_lookup_light+0xc5/0x180 [ 716.061432][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 716.061436][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 716.061440][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.061445][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 716.061449][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 716.061453][ C1] do_syscall_64+0x2d/0x70 [ 716.061457][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 716.061461][ C1] RIP: 0033:0x441579 [ 716.061467][ C1] 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 [ 716.061478][ C1] RSP: 002b:00007fff67df0c08 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 716.061488][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441579 [ 716.061494][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 716.061500][ C1] RBP: 00007fff67df0c10 R08: 0000000120080522 R09: 0000000120080522 [ 716.061506][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2930 [ 716.061511][ C1] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 716.062477][ T1656] Kernel panic - not syncing: hung_task: blocked tasks [ 716.634185][ T1656] CPU: 0 PID: 1656 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 716.642513][ T1656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.652653][ T1656] Call Trace: [ 716.655931][ T1656] dump_stack+0x107/0x163 [ 716.660442][ T1656] panic+0x306/0x73d [ 716.664342][ T1656] ? __warn_printk+0xf3/0xf3 [ 716.668934][ T1656] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.674216][ T1656] ? preempt_schedule_thunk+0x16/0x18 [ 716.679594][ T1656] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 716.685839][ T1656] ? watchdog.cold+0x5/0x158 [ 716.690439][ T1656] watchdog.cold+0x16/0x158 [ 716.694952][ T1656] ? reset_hung_task_detector+0x30/0x30 [ 716.700592][ T1656] kthread+0x3b1/0x4a0 [ 716.704663][ T1656] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 716.710728][ T1656] ret_from_fork+0x1f/0x30 [ 716.719116][ T1656] Kernel Offset: disabled [ 716.724073][ T1656] Rebooting in 86400 seconds..