Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 443.985385][ T6902] IPVS: ftp: loaded support on port[0] = 21 [ 595.730481][ T1172] INFO: task kworker/u4:1:21 blocked for more than 143 seconds. [ 595.738277][ T1172] Not tainted 5.9.0-rc8-syzkaller #0 [ 595.745686][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.755449][ T1172] task:kworker/u4:1 state:D stack:24456 pid: 21 ppid: 2 flags:0x00004000 [ 595.765834][ T1172] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 595.774142][ T1172] Call Trace: [ 595.777491][ T1172] __schedule+0xec9/0x2280 [ 595.784025][ T1172] ? io_schedule_timeout+0x140/0x140 [ 595.789327][ T1172] schedule+0xd0/0x2a0 [ 595.794506][ T1172] schedule_preempt_disabled+0xf/0x20 [ 595.799877][ T1172] __mutex_lock+0x3e2/0x10e0 [ 595.805531][ T1172] ? tcindex_partial_destroy_work+0x13/0x50 [ 595.812191][ T1172] ? mutex_lock_io_nested+0xf60/0xf60 [ 595.817673][ T1172] ? process_one_work+0x85f/0x1670 [ 595.825014][ T1172] ? lock_release+0x8f0/0x8f0 [ 595.829699][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.836048][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.842000][ T1172] tcindex_partial_destroy_work+0x13/0x50 [ 595.847723][ T1172] process_one_work+0x94c/0x1670 [ 595.853815][ T1172] ? lock_release+0x8f0/0x8f0 [ 595.858496][ T1172] ? pwq_dec_nr_in_flight+0x320/0x320 [ 595.864987][ T1172] ? rwlock_bug.part.0+0x90/0x90 [ 595.869997][ T1172] ? lockdep_hardirqs_off+0x96/0xd0 [ 595.876404][ T1172] worker_thread+0x64c/0x1120 [ 595.881999][ T1172] ? process_one_work+0x1670/0x1670 [ 595.887196][ T1172] kthread+0x3b5/0x4a0 [ 595.892475][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 595.897654][ T1172] ret_from_fork+0x1f/0x30 [ 595.903367][ T1172] [ 595.903367][ T1172] Showing all locks held in the system: [ 595.911904][ T1172] 3 locks held by kworker/u4:1/21: [ 595.917016][ T1172] #0: ffff88821a941138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 595.929676][ T1172] #1: ffffc90000dd7da8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 595.941900][ T1172] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 595.953889][ T1172] 1 lock held by khungtaskd/1172: [ 595.958905][ T1172] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 595.970745][ T1172] 1 lock held by in:imklog/6583: [ 595.975677][ T1172] #0: ffff8880a7f8b870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 595.986061][ T1172] 3 locks held by kworker/0:0/6894: [ 595.991984][ T1172] #0: ffff888214dd9d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 596.004034][ T1172] #1: ffffc9000436fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 596.015198][ T1172] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 596.025435][ T1172] 1 lock held by syz-executor773/6923: [ 596.032709][ T1172] [ 596.035043][ T1172] ============================================= [ 596.035043][ T1172] [ 596.044640][ T1172] NMI backtrace for cpu 0 [ 596.048972][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 596.057193][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.067233][ T1172] Call Trace: [ 596.070617][ T1172] dump_stack+0x198/0x1fd [ 596.074946][ T1172] nmi_cpu_backtrace.cold+0x70/0xb1 [ 596.080202][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.085828][ T1172] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 596.091853][ T1172] watchdog+0xd7d/0x1000 [ 596.096092][ T1172] ? reset_hung_task_detector+0x30/0x30 [ 596.101631][ T1172] kthread+0x3b5/0x4a0 [ 596.106091][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 596.111197][ T1172] ret_from_fork+0x1f/0x30 [ 596.115756][ T1172] Sending NMI from CPU 0 to CPUs 1: [ 596.122508][ C1] NMI backtrace for cpu 1 [ 596.122515][ C1] CPU: 1 PID: 6923 Comm: syz-executor773 Not tainted 5.9.0-rc8-syzkaller #0 [ 596.122521][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.122525][ C1] RIP: 0010:find_held_lock+0xe3/0x110 [ 596.122537][ C1] Code: 45 31 e4 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 11 5b <45> 89 3e 4c 89 e0 5d 41 5c 41 5d 41 5e 41 5f c3 4c 89 f7 e8 55 45 [ 596.122541][ C1] RSP: 0018:ffffc900011f6a50 EFLAGS: 00000097 [ 596.122548][ C1] RAX: 0000000000000003 RBX: 0000000000000002 RCX: ffffc900011f6ad0 [ 596.122554][ C1] RDX: 0000000000000004 RSI: ffff88809a26c468 RDI: ffff8880a6aded70 [ 596.122559][ C1] RBP: 1ffff9200023ed52 R08: 0000000000000001 R09: ffff8880a6aded40 [ 596.122564][ C1] R10: fffffbfff16b96d1 R11: 0000000000000000 R12: ffff8880a6aded70 [ 596.122569][ C1] R13: ffff88809a26c468 R14: ffffc900011f6ad0 R15: 0000000000000001 [ 596.122575][ C1] FS: 00000000018ee880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 596.122580][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 596.122585][ C1] CR2: 00007f20150936c0 CR3: 000000009f07d000 CR4: 00000000001506e0 [ 596.122590][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 596.122595][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 596.122598][ C1] Call Trace: [ 596.122602][ C1] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 596.122605][ C1] lock_release+0x244/0x8f0 [ 596.122608][ C1] ? lock_downgrade+0x830/0x830 [ 596.122612][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 596.122616][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 596.122620][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 596.122624][ C1] __mutex_unlock_slowpath+0x81/0x610 [ 596.122627][ C1] ? wait_for_completion+0x260/0x260 [ 596.122631][ C1] tcf_idr_check_alloc+0x29e/0x3b0 [ 596.122634][ C1] tcf_police_init+0x347/0x13a0 [ 596.122638][ C1] ? tcf_police_cleanup+0x60/0x60 [ 596.122641][ C1] ? find_held_lock+0x2d/0x110 [ 596.122645][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 596.122648][ C1] tcf_action_init_1+0x1a3/0x990 [ 596.122652][ C1] ? tcf_action_dump_old+0x80/0x80 [ 596.122655][ C1] ? lock_acquire+0x1f3/0xaf0 [ 596.122659][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122662][ C1] ? find_held_lock+0x2d/0x110 [ 596.122665][ C1] ? fs_reclaim_release+0x90/0xd0 [ 596.122669][ C1] ? mark_lock+0x82/0x1660 [ 596.122672][ C1] ? mark_lock+0x82/0x1660 [ 596.122675][ C1] tcf_exts_validate+0x138/0x420 [ 596.122679][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 596.122682][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 596.122686][ C1] tcindex_set_parms+0x189/0x20d0 [ 596.122690][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.122694][ C1] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 596.122698][ C1] ? __nla_validate_parse+0x2d3/0x25c0 [ 596.122702][ C1] ? nla_get_range_signed+0x520/0x520 [ 596.122705][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122709][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122712][ C1] ? find_held_lock+0x2d/0x110 [ 596.122715][ C1] tcindex_change+0x203/0x2e0 [ 596.122719][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 596.122722][ C1] ? tcindex_lookup+0x390/0x390 [ 596.122726][ C1] ? lockdep_rtnl_is_held+0x22/0x30 [ 596.122729][ C1] tc_new_tfilter+0x1398/0x2130 [ 596.122733][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 596.122737][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 596.122741][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.122745][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.122748][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122752][ C1] ? security_capable+0x8f/0xc0 [ 596.122755][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122758][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 596.122762][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 596.122766][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 596.122769][ C1] ? lock_acquire+0x1f3/0xaf0 [ 596.122773][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 596.122776][ C1] netlink_rcv_skb+0x15a/0x430 [ 596.122780][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 596.122783][ C1] ? netlink_ack+0xa10/0xa10 [ 596.122787][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 596.122791][ C1] netlink_unicast+0x533/0x7d0 [ 596.122794][ C1] ? netlink_attachskb+0x810/0x810 [ 596.122798][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 596.122801][ C1] ? __check_object_size+0x171/0x3e4 [ 596.122805][ C1] netlink_sendmsg+0x856/0xd90 [ 596.122808][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 596.122812][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 596.122815][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 596.122818][ C1] sock_sendmsg+0xcf/0x120 [ 596.122822][ C1] ____sys_sendmsg+0x331/0x810 [ 596.122825][ C1] ? kernel_sendmsg+0x50/0x50 [ 596.122828][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 596.122832][ C1] ? __lock_acquire+0x164a/0x5780 [ 596.122840][ C1] ___sys_sendmsg+0xf3/0x170 [ 596.122844][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 596.122848][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.122852][ C1] ? fs_reclaim_release+0x90/0xd0 [ 596.122855][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122858][ C1] ? find_held_lock+0x2d/0x110 [ 596.122862][ C1] ? __might_fault+0x11f/0x1d0 [ 596.122865][ C1] ? lock_downgrade+0x830/0x830 [ 596.122869][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122872][ C1] __sys_sendmmsg+0x195/0x480 [ 596.122875][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 596.122879][ C1] ? find_held_lock+0x2d/0x110 [ 596.122882][ C1] ? __fd_install+0x1b4/0x600 [ 596.122886][ C1] ? alloc_file_pseudo+0x1/0x250 [ 596.122889][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122892][ C1] ? __fd_install+0x1e6/0x600 [ 596.122896][ C1] ? __sys_socket+0x16d/0x200 [ 596.122899][ C1] ? lock_is_held_type+0xbb/0xf0 [ 596.122903][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 596.122907][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 596.122911][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 596.122914][ C1] do_syscall_64+0x2d/0x70 [ 596.122918][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.122921][ C1] RIP: 0033:0x441889 [ 596.122932][ 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 [ 596.122936][ C1] RSP: 002b:00007fff1724c618 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 596.122945][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441889 [ 596.122950][ C1] RDX: 04924924924924b3 RSI: 0000000020000200 RDI: 0000000000000004 [ 596.122955][ C1] RBP: 00007fff1724c620 R08: 0000000120080522 R09: 0000000120080522 [ 596.122961][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2c90 [ 596.122966][ C1] R13: 0000000000402760 R14: 0000000000000000 R15: 0000000000000000 [ 596.122972][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 596.150369][ T1172] Kernel panic - not syncing: hung_task: blocked tasks [ 596.795495][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 596.803716][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.813754][ T1172] Call Trace: [ 596.817041][ T1172] dump_stack+0x198/0x1fd [ 596.821427][ T1172] panic+0x382/0x7fb [ 596.825313][ T1172] ? __warn_printk+0xf3/0xf3 [ 596.829899][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.835523][ T1172] ? preempt_schedule_thunk+0x16/0x18 [ 596.840888][ T1172] ? watchdog.cold+0x5/0x16b [ 596.845467][ T1172] ? watchdog+0xa82/0x1000 [ 596.849983][ T1172] watchdog.cold+0x16/0x16b [ 596.854484][ T1172] ? reset_hung_task_detector+0x30/0x30 [ 596.860019][ T1172] kthread+0x3b5/0x4a0 [ 596.864093][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 596.869197][ T1172] ret_from_fork+0x1f/0x30 [ 596.875091][ T1172] Kernel Offset: disabled [ 596.879414][ T1172] Rebooting in 86400 seconds..