Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 486.568377][ T8514] IPVS: ftp: loaded support on port[0] = 21 [ 649.965769][ T1654] INFO: task kworker/u4:0:8 blocked for more than 143 seconds. [ 649.973507][ T1654] Not tainted 5.10.0-rc7-syzkaller #0 [ 649.981444][ T1654] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 649.991090][ T1654] task:kworker/u4:0 state:D stack:23600 pid: 8 ppid: 2 flags:0x00004000 [ 650.002499][ T1654] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 650.010955][ T1654] Call Trace: [ 650.014321][ T1654] __schedule+0x893/0x2130 [ 650.019920][ T1654] ? io_schedule_timeout+0x140/0x140 [ 650.025412][ T1654] schedule+0xcf/0x270 [ 650.030690][ T1654] schedule_preempt_disabled+0xf/0x20 [ 650.036880][ T1654] __mutex_lock+0x3e2/0x10e0 [ 650.041508][ T1654] ? tcindex_partial_destroy_work+0x13/0x50 [ 650.050764][ T1654] ? mutex_lock_io_nested+0xf60/0xf60 [ 650.057169][ T1654] ? lock_release+0x710/0x710 [ 650.061897][ T1654] tcindex_partial_destroy_work+0x13/0x50 [ 650.068970][ T1654] process_one_work+0x933/0x15a0 [ 650.073932][ T1654] ? lock_release+0x710/0x710 [ 650.079676][ T1654] ? pwq_dec_nr_in_flight+0x320/0x320 [ 650.085088][ T1654] ? rwlock_bug.part.0+0x90/0x90 [ 650.091461][ T1654] ? _raw_spin_lock_irq+0x41/0x50 [ 650.097190][ T1654] worker_thread+0x64c/0x1120 [ 650.101904][ T1654] ? process_one_work+0x15a0/0x15a0 [ 650.108410][ T1654] kthread+0x3b1/0x4a0 [ 650.112500][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 650.119613][ T1654] ret_from_fork+0x1f/0x30 [ 650.124247][ T1654] [ 650.124247][ T1654] Showing all locks held in the system: [ 650.134650][ T1654] 3 locks held by kworker/u4:0/8: [ 650.141867][ T1654] #0: ffff888015273138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 650.154580][ T1654] #1: ffffc90000cd7da8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 650.166898][ T1654] #2: ffffffff8c9278c8 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 650.178673][ T1654] 1 lock held by khungtaskd/1654: [ 650.183724][ T1654] #0: ffffffff8b3378e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 650.194949][ T1654] 1 lock held by in:imklog/8188: [ 650.200572][ T1654] #0: ffff88801e37c5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 650.210575][ T1654] 3 locks held by kworker/0:1/8506: [ 650.216507][ T1654] #0: ffff88814729c938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 650.229052][ T1654] #1: ffffc90000e0fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 650.240373][ T1654] #2: ffffffff8c9278c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 650.250964][ T1654] 1 lock held by syz-executor997/8535: [ 650.258560][ T1654] [ 650.260907][ T1654] ============================================= [ 650.260907][ T1654] [ 650.270757][ T1654] NMI backtrace for cpu 0 [ 650.275107][ T1654] CPU: 0 PID: 1654 Comm: khungtaskd Not tainted 5.10.0-rc7-syzkaller #0 [ 650.283422][ T1654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 650.293661][ T1654] Call Trace: [ 650.296979][ T1654] dump_stack+0x107/0x163 [ 650.301342][ T1654] nmi_cpu_backtrace.cold+0x44/0xd7 [ 650.307078][ T1654] ? lapic_can_unplug_cpu+0x80/0x80 [ 650.312316][ T1654] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 650.318315][ T1654] watchdog+0xd43/0xfa0 [ 650.322478][ T1654] ? reset_hung_task_detector+0x30/0x30 [ 650.328047][ T1654] kthread+0x3b1/0x4a0 [ 650.332117][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 650.338015][ T1654] ret_from_fork+0x1f/0x30 [ 650.342614][ T1654] Sending NMI from CPU 0 to CPUs 1: [ 650.348846][ C1] NMI backtrace for cpu 1 [ 650.348852][ C1] CPU: 1 PID: 8535 Comm: syz-executor997 Not tainted 5.10.0-rc7-syzkaller #0 [ 650.348858][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 650.348862][ C1] RIP: 0010:rcu_read_lock_sched_held+0x3a/0x70 [ 650.348872][ C1] Code: 06 44 89 e0 41 5c c3 e8 74 6f 00 00 84 c0 74 41 e8 2b 84 00 00 84 c0 74 38 be ff ff ff ff 48 c7 c7 20 78 33 8b e8 c6 67 89 07 <85> c0 75 d3 65 8b 05 9b cf a5 7e a9 ff ff ff 7f 75 c5 9c 41 5c 49 [ 650.348877][ C1] RSP: 0018:ffffc9000185ea70 EFLAGS: 00000282 [ 650.348886][ C1] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffffffff19d9bfb [ 650.348890][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 650.348895][ C1] RBP: 1ffff9200030bd52 R08: 0000000000000000 R09: ffffffff8cecae0f [ 650.348899][ C1] R10: fffffbfff19d95c1 R11: 0000000000000000 R12: 0000000000000001 [ 650.348904][ C1] R13: 0000000000000001 R14: 1ffff9200030bd6d R15: ffff888147a03a00 [ 650.348909][ C1] FS: 000000000240d880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 650.348913][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 650.348918][ C1] CR2: 00007f07cc1666c0 CR3: 00000000255ca000 CR4: 00000000001506e0 [ 650.348922][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 650.348926][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 650.348929][ C1] Call Trace: [ 650.348932][ C1] lock_release+0x5b7/0x710 [ 650.348935][ C1] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 650.348938][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 650.348941][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 650.348945][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 650.348953][ C1] __mutex_unlock_slowpath+0x81/0x610 [ 650.348956][ C1] ? wait_for_completion+0x260/0x260 [ 650.348960][ C1] tcf_idr_check_alloc+0x29e/0x3b0 [ 650.348963][ C1] tcf_police_init+0x347/0x13a0 [ 650.348966][ C1] ? tcf_police_cleanup+0x60/0x60 [ 650.348969][ C1] ? find_held_lock+0x2d/0x110 [ 650.348972][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 650.348976][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 650.348979][ C1] tcf_action_init_1+0x1a3/0x990 [ 650.348982][ C1] ? tcf_action_dump_old+0x80/0x80 [ 650.348985][ C1] ? ____sys_sendmsg+0x331/0x810 [ 650.348988][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 650.348991][ C1] ? __sys_sendmmsg+0x195/0x470 [ 650.348994][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 650.348997][ C1] ? do_syscall_64+0x2d/0x70 [ 650.349001][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 650.349004][ C1] ? find_held_lock+0x2d/0x110 [ 650.349007][ C1] tcf_exts_validate+0x138/0x420 [ 650.349010][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 650.349013][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 650.349017][ C1] tcindex_set_parms+0x189/0x20d0 [ 650.349020][ C1] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 650.349023][ C1] ? __nla_validate_parse+0x2d3/0x2ae0 [ 650.349030][ C1] ? nla_get_range_signed+0x520/0x520 [ 650.349034][ C1] ? find_held_lock+0x2d/0x110 [ 650.349037][ C1] tcindex_change+0x212/0x320 [ 650.349040][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 650.349043][ C1] ? tcindex_lookup+0x390/0x390 [ 650.349046][ C1] ? lockdep_rtnl_is_held+0x22/0x30 [ 650.349049][ C1] tc_new_tfilter+0x1398/0x2130 [ 650.349053][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 650.349056][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 650.349059][ C1] ? kernel_text_address+0xbd/0xf0 [ 650.349062][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 650.349066][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 650.349069][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 650.349072][ C1] netlink_rcv_skb+0x153/0x420 [ 650.349075][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 650.349078][ C1] ? netlink_ack+0xaa0/0xaa0 [ 650.349082][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 650.349085][ C1] netlink_unicast+0x533/0x7d0 [ 650.349088][ C1] ? netlink_attachskb+0x810/0x810 [ 650.349091][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 650.349094][ C1] ? __check_object_size+0x171/0x3f0 [ 650.349097][ C1] netlink_sendmsg+0x856/0xd90 [ 650.349101][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 650.349104][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 650.349110][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 650.349113][ C1] sock_sendmsg+0xcf/0x120 [ 650.349116][ C1] ____sys_sendmsg+0x331/0x810 [ 650.349119][ C1] ? kernel_sendmsg+0x50/0x50 [ 650.349122][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 650.349125][ C1] ? __lock_acquire+0x16b7/0x5500 [ 650.349128][ C1] ___sys_sendmsg+0xf3/0x170 [ 650.349132][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 650.349135][ C1] ? find_held_lock+0x2d/0x110 [ 650.349138][ C1] ? __might_fault+0xd3/0x180 [ 650.349141][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 650.349144][ C1] __sys_sendmmsg+0x195/0x470 [ 650.349150][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 650.349153][ C1] ? find_held_lock+0x2d/0x110 [ 650.349156][ C1] ? alloc_file_pseudo+0x1/0x250 [ 650.349159][ C1] ? __fd_install+0x1e6/0x600 [ 650.349162][ C1] ? __sys_socket+0x16d/0x200 [ 650.349165][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 650.349169][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 650.349172][ C1] do_syscall_64+0x2d/0x70 [ 650.349175][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 650.349178][ C1] RIP: 0033:0x441b39 [ 650.349187][ C1] Code: e8 cc 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 ab 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 650.349191][ C1] RSP: 002b:00007fff6f09b208 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 650.349199][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441b39 [ 650.349203][ C1] RDX: 04924924924924b3 RSI: 0000000020000200 RDI: 0000000000000004 [ 650.349207][ C1] RBP: 00007fff6f09b210 R08: 0000000120080522 R09: 0000000120080522 [ 650.349212][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3170 [ 650.349216][ C1] R13: 0000000000402800 R14: 0000000000000000 R15: 0000000000000000 [ 650.365653][ T1654] Kernel panic - not syncing: hung_task: blocked tasks [ 650.946193][ T1654] CPU: 0 PID: 1654 Comm: khungtaskd Not tainted 5.10.0-rc7-syzkaller #0 [ 650.954791][ T1654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 650.965567][ T1654] Call Trace: [ 650.968876][ T1654] dump_stack+0x107/0x163 [ 650.973354][ T1654] panic+0x306/0x73d [ 650.977361][ T1654] ? __warn_printk+0xf3/0xf3 [ 650.981974][ T1654] ? lapic_can_unplug_cpu+0x80/0x80 [ 650.987178][ T1654] ? preempt_schedule_thunk+0x16/0x18 [ 650.992577][ T1654] ? watchdog.cold+0x5/0x158 [ 650.997177][ T1654] ? watchdog+0xa80/0xfa0 [ 651.001654][ T1654] watchdog.cold+0x16/0x158 [ 651.006192][ T1654] ? reset_hung_task_detector+0x30/0x30 [ 651.011764][ T1654] kthread+0x3b1/0x4a0 [ 651.015864][ T1654] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 651.021759][ T1654] ret_from_fork+0x1f/0x30 [ 651.027168][ T1654] Kernel Offset: disabled [ 651.031520][ T1654] Rebooting in 86400 seconds..