Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 460.552617][ T6869] IPVS: ftp: loaded support on port[0] = 21 [ 616.235348][ T1171] INFO: task kworker/u4:6:247 blocked for more than 143 seconds. [ 616.243233][ T1171] Not tainted 5.9.0-rc6-syzkaller #0 [ 616.251404][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.260961][ T1171] task:kworker/u4:6 state:D stack:23816 pid: 247 ppid: 2 flags:0x00004000 [ 616.271048][ T1171] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 616.279405][ T1171] Call Trace: [ 616.282752][ T1171] __schedule+0xec9/0x2280 [ 616.288349][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.293667][ T1171] schedule+0xd0/0x2a0 [ 616.299021][ T1171] schedule_preempt_disabled+0xf/0x20 [ 616.304509][ T1171] __mutex_lock+0x3e2/0x10e0 [ 616.311534][ T1171] ? tcindex_partial_destroy_work+0x13/0x50 [ 616.318196][ T1171] ? mutex_lock_io_nested+0xf60/0xf60 [ 616.323586][ T1171] ? process_one_work+0x85f/0x1670 [ 616.329956][ T1171] ? lock_release+0x8f0/0x8f0 [ 616.334666][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.341209][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.347236][ T1171] tcindex_partial_destroy_work+0x13/0x50 [ 616.352983][ T1171] process_one_work+0x94c/0x1670 [ 616.360276][ T1171] ? lock_release+0x8f0/0x8f0 [ 616.364970][ T1171] ? pwq_dec_nr_in_flight+0x320/0x320 [ 616.371602][ T1171] ? rwlock_bug.part.0+0x90/0x90 [ 616.377413][ T1171] ? lockdep_hardirqs_off+0x96/0xd0 [ 616.382641][ T1171] worker_thread+0x64c/0x1120 [ 616.388560][ T1171] ? process_one_work+0x1670/0x1670 [ 616.393785][ T1171] kthread+0x3b5/0x4a0 [ 616.399167][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.404301][ T1171] ret_from_fork+0x1f/0x30 [ 616.410080][ T1171] [ 616.410080][ T1171] Showing all locks held in the system: [ 616.418641][ T1171] 3 locks held by kworker/u4:6/247: [ 616.423845][ T1171] #0: ffff8880a639c138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 616.438583][ T1171] #1: ffffc90001af7da8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 616.450868][ T1171] #2: ffffffff8b14d828 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 616.462406][ T1171] 1 lock held by khungtaskd/1171: [ 616.468232][ T1171] #0: ffffffff8a067f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.479129][ T1171] 1 lock held by in:imklog/6564: [ 616.484084][ T1171] #0: ffff8880a9106670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.494482][ T1171] 3 locks held by kworker/0:0/6861: [ 616.500482][ T1171] #0: ffff888214cf6938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 616.512429][ T1171] #1: ffffc90001687da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 616.523548][ T1171] #2: ffffffff8b14d828 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 616.533996][ T1171] 1 lock held by syz-executor028/6890: [ 616.540314][ T1171] [ 616.542645][ T1171] ============================================= [ 616.542645][ T1171] [ 616.552258][ T1171] NMI backtrace for cpu 0 [ 616.556705][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 616.564938][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.574990][ T1171] Call Trace: [ 616.578387][ T1171] dump_stack+0x198/0x1fd [ 616.582745][ T1171] nmi_cpu_backtrace.cold+0x70/0xb1 [ 616.587955][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.593595][ T1171] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.599583][ T1171] watchdog+0xd7d/0x1000 [ 616.603841][ T1171] ? reset_hung_task_detector+0x30/0x30 [ 616.609391][ T1171] kthread+0x3b5/0x4a0 [ 616.613458][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.618594][ T1171] ret_from_fork+0x1f/0x30 [ 616.623213][ T1171] Sending NMI from CPU 0 to CPUs 1: [ 616.629893][ C1] NMI backtrace for cpu 1 [ 616.629900][ C1] CPU: 1 PID: 6890 Comm: syz-executor028 Not tainted 5.9.0-rc6-syzkaller #0 [ 616.629906][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.629911][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x2a/0x60 [ 616.629923][ C1] Code: 65 48 8b 14 25 c0 fe 01 00 65 8b 05 30 c0 8b 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 2c 14 00 00 85 c0 74 2b <8b> 82 08 14 00 00 83 f8 02 75 20 48 8b 8a 10 14 00 00 8b 92 0c 14 [ 616.629927][ C1] RSP: 0018:ffffc90002cdeb68 EFLAGS: 00000246 [ 616.629936][ C1] RAX: 0000000080000000 RBX: dffffc0000000000 RCX: ffffffff83d84523 [ 616.629941][ C1] RDX: ffff8880a92d2200 RSI: ffffffff83d8452e RDI: 0000000000000007 [ 616.629947][ C1] RBP: 0000000000000001 R08: 0000000000000000 R09: ffff8880a8b0e407 [ 616.629952][ C1] R10: 0000000000000002 R11: 0000000000000000 R12: ffff8880a4b8ccc2 [ 616.629958][ C1] R13: ffff8880a8b0e4d8 R14: 0000000000000002 R15: 0000000000000000 [ 616.629964][ C1] FS: 00000000025b9880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 616.629968][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.629974][ C1] CR2: 00007f75ac76d6c0 CR3: 00000000a1c3e000 CR4: 00000000001506e0 [ 616.629979][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.629985][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.629988][ C1] Call Trace: [ 616.629992][ C1] __radix_tree_lookup+0x10e/0x290 [ 616.629996][ C1] tcf_idr_check_alloc+0xb0/0x3b0 [ 616.629999][ C1] tcf_police_init+0x347/0x13a0 [ 616.630003][ C1] ? tcf_police_cleanup+0x60/0x60 [ 616.630007][ C1] ? find_held_lock+0x2d/0x110 [ 616.630011][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 616.630015][ C1] tcf_action_init_1+0x1ab/0xac0 [ 616.630019][ C1] ? tcf_action_dump_old+0x80/0x80 [ 616.630023][ C1] ? lock_acquire+0x1f3/0xaf0 [ 616.630027][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630030][ C1] ? find_held_lock+0x2d/0x110 [ 616.630034][ C1] ? fs_reclaim_release+0x90/0xd0 [ 616.630038][ C1] ? mark_lock+0x82/0x1660 [ 616.630042][ C1] ? mark_lock+0x82/0x1660 [ 616.630045][ C1] tcf_exts_validate+0x138/0x420 [ 616.630049][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 616.630054][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 616.630057][ C1] tcindex_set_parms+0x189/0x20d0 [ 616.630062][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.630066][ C1] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 616.630071][ C1] ? __nla_validate_parse+0x2d4/0x2210 [ 616.630075][ C1] ? nla_get_range_signed+0x520/0x520 [ 616.630079][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630082][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630086][ C1] ? find_held_lock+0x2d/0x110 [ 616.630090][ C1] tcindex_change+0x203/0x2e0 [ 616.630094][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 616.630098][ C1] ? tcindex_lookup+0x390/0x390 [ 616.630102][ C1] ? lockdep_rtnl_is_held+0x22/0x30 [ 616.630106][ C1] tc_new_tfilter+0x1398/0x2130 [ 616.630110][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 616.630114][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 616.630118][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.630123][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.630126][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630130][ C1] ? security_capable+0x8f/0xc0 [ 616.630134][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630138][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 616.630142][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 616.630146][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 616.630150][ C1] ? lock_acquire+0x1f3/0xaf0 [ 616.630154][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 616.630158][ C1] netlink_rcv_skb+0x15a/0x430 [ 616.630162][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 616.630166][ C1] ? netlink_ack+0xa10/0xa10 [ 616.630170][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 616.630174][ C1] netlink_unicast+0x533/0x7d0 [ 616.630178][ C1] ? netlink_attachskb+0x810/0x810 [ 616.630182][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 616.630186][ C1] ? __check_object_size+0x171/0x3e4 [ 616.630190][ C1] netlink_sendmsg+0x856/0xd90 [ 616.630193][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 616.630198][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 616.630202][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 616.630205][ C1] sock_sendmsg+0xcf/0x120 [ 616.630209][ C1] ____sys_sendmsg+0x331/0x810 [ 616.630213][ C1] ? kernel_sendmsg+0x50/0x50 [ 616.630217][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 616.630221][ C1] ? __lock_acquire+0x164a/0x5780 [ 616.630224][ C1] ___sys_sendmsg+0xf3/0x170 [ 616.630228][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 616.630233][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.630237][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630241][ C1] ? find_held_lock+0x2d/0x110 [ 616.630244][ C1] ? __might_fault+0x11f/0x1d0 [ 616.630248][ C1] ? lock_downgrade+0x830/0x830 [ 616.630252][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630256][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630260][ C1] __sys_sendmmsg+0x195/0x480 [ 616.630264][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 616.630267][ C1] ? __might_fault+0x190/0x1d0 [ 616.630271][ C1] ? _copy_to_user+0x126/0x160 [ 616.630275][ C1] ? sockfd_lookup_light+0xc6/0x180 [ 616.630279][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 616.630283][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 616.630287][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.630291][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 616.630295][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 616.630299][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 616.630303][ C1] do_syscall_64+0x2d/0x70 [ 616.630307][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.630311][ C1] RIP: 0033:0x441719 [ 616.630322][ 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 [ 616.630326][ C1] RSP: 002b:00007fffc27a5578 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 616.630336][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441719 [ 616.630341][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 616.630347][ C1] RBP: 00007fffc27a5580 R08: 0000000120080522 R09: 0000000120080522 [ 616.630352][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2a50 [ 616.630358][ C1] R13: 00000000004025f0 R14: 0000000000000000 R15: 0000000000000000 [ 616.630364][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 616.683328][ T1171] Kernel panic - not syncing: hung_task: blocked tasks [ 617.274798][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 617.283032][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.293088][ T1171] Call Trace: [ 617.296390][ T1171] dump_stack+0x198/0x1fd [ 617.300748][ T1171] panic+0x382/0x7fb [ 617.304649][ T1171] ? __warn_printk+0xf3/0xf3 [ 617.309250][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.314903][ T1171] ? preempt_schedule_thunk+0x16/0x18 [ 617.320279][ T1171] ? watchdog.cold+0x5/0x16b [ 617.324872][ T1171] ? watchdog+0xa82/0x1000 [ 617.329304][ T1171] watchdog.cold+0x16/0x16b [ 617.333828][ T1171] ? reset_hung_task_detector+0x30/0x30 [ 617.339383][ T1171] kthread+0x3b5/0x4a0 [ 617.343482][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 617.348610][ T1171] ret_from_fork+0x1f/0x30 [ 617.354362][ T1171] Kernel Offset: disabled [ 617.358727][ T1171] Rebooting in 86400 seconds..