Warning: Permanently added '10.128.0.188' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 487.777734][ T35] audit: type=1400 audit(1609487667.878:8): avc: denied { execmem } for pid=8476 comm="syz-executor237" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 487.796277][ T8477] IPVS: ftp: loaded support on port[0] = 21 [ 721.280724][ T1644] INFO: task kworker/u4:4:149 blocked for more than 143 seconds. [ 721.288623][ T1644] Not tainted 5.11.0-rc1-syzkaller #0 [ 721.297285][ T1644] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.306835][ T1644] task:kworker/u4:4 state:D stack:23824 pid: 149 ppid: 2 flags:0x00004000 [ 721.316989][ T1644] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 721.325419][ T1644] Call Trace: [ 721.328750][ T1644] __schedule+0x90c/0x21a0 [ 721.334525][ T1644] ? io_schedule_timeout+0x140/0x140 [ 721.339850][ T1644] schedule+0xcf/0x270 [ 721.345306][ T1644] schedule_preempt_disabled+0xf/0x20 [ 721.352709][ T1644] __mutex_lock+0x81a/0x1110 [ 721.357365][ T1644] ? tcindex_partial_destroy_work+0x13/0x50 [ 721.364567][ T1644] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.369972][ T1644] ? lock_release+0x710/0x710 [ 721.375958][ T1644] tcindex_partial_destroy_work+0x13/0x50 [ 721.382535][ T1644] process_one_work+0x98d/0x15f0 [ 721.387575][ T1644] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.394279][ T1644] ? rwlock_bug.part.0+0x90/0x90 [ 721.399241][ T1644] ? _raw_spin_lock_irq+0x41/0x50 [ 721.405607][ T1644] worker_thread+0x64c/0x1120 [ 721.410322][ T1644] ? process_one_work+0x15f0/0x15f0 [ 721.416967][ T1644] kthread+0x3b1/0x4a0 [ 721.421874][ T1644] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.427795][ T1644] ret_from_fork+0x1f/0x30 [ 721.433644][ T1644] INFO: task kworker/1:1:8469 blocked for more than 143 seconds. [ 721.442217][ T1644] Not tainted 5.11.0-rc1-syzkaller #0 [ 721.448115][ T1644] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.459249][ T1644] task:kworker/1:1 state:D stack:29224 pid: 8469 ppid: 2 flags:0x00004000 [ 721.470109][ T1644] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.477263][ T1644] Call Trace: [ 721.480562][ T1644] __schedule+0x90c/0x21a0 [ 721.487498][ T1644] ? io_schedule_timeout+0x140/0x140 [ 721.493591][ T1644] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.498812][ T1644] ? lockdep_hardirqs_on+0x79/0x100 [ 721.505289][ T1644] schedule+0xcf/0x270 [ 721.509382][ T1644] schedule_preempt_disabled+0xf/0x20 [ 721.516021][ T1644] __mutex_lock+0x81a/0x1110 [ 721.521430][ T1644] ? addrconf_verify_work+0xa/0x20 [ 721.526570][ T1644] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.533164][ T1644] ? lock_release+0x710/0x710 [ 721.537863][ T1644] ? lock_downgrade+0x6d0/0x6d0 [ 721.543926][ T1644] addrconf_verify_work+0xa/0x20 [ 721.548894][ T1644] process_one_work+0x98d/0x15f0 [ 721.555236][ T1644] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.561417][ T1644] ? rwlock_bug.part.0+0x90/0x90 [ 721.566377][ T1644] ? _raw_spin_lock_irq+0x41/0x50 [ 721.572671][ T1644] worker_thread+0x64c/0x1120 [ 721.577382][ T1644] ? __kthread_parkme+0x13f/0x1e0 [ 721.583586][ T1644] ? process_one_work+0x15f0/0x15f0 [ 721.588806][ T1644] kthread+0x3b1/0x4a0 [ 721.594086][ T1644] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.600001][ T1644] ret_from_fork+0x1f/0x30 [ 721.605691][ T1644] [ 721.605691][ T1644] Showing all locks held in the system: [ 721.615472][ T1644] 3 locks held by kworker/u4:4/149: [ 721.621632][ T1644] #0: ffff8881417aa138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 721.633993][ T1644] #1: ffffc90001077da8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 721.646263][ T1644] #2: ffffffff8c948be8 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 721.657288][ T1644] 1 lock held by khungtaskd/1644: [ 721.663064][ T1644] #0: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.673784][ T1644] 1 lock held by in:imklog/8161: [ 721.678727][ T1644] #0: ffff8880209ebe30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.689130][ T1644] 3 locks held by kworker/1:1/8469: [ 721.696175][ T1644] #0: ffff8880232de538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 721.707917][ T1644] #1: ffffc900011d7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 721.719040][ T1644] #2: ffffffff8c948be8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 721.729238][ T1644] 2 locks held by syz-executor237/8499: [ 721.735750][ T1644] [ 721.738110][ T1644] ============================================= [ 721.738110][ T1644] [ 721.749443][ T1644] NMI backtrace for cpu 0 [ 721.753997][ T1644] CPU: 0 PID: 1644 Comm: khungtaskd Not tainted 5.11.0-rc1-syzkaller #0 [ 721.762329][ T1644] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.772384][ T1644] Call Trace: [ 721.775661][ T1644] dump_stack+0x107/0x163 [ 721.780029][ T1644] nmi_cpu_backtrace.cold+0x44/0xd7 [ 721.785236][ T1644] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.790486][ T1644] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.796512][ T1644] watchdog+0xd43/0xfa0 [ 721.800746][ T1644] ? reset_hung_task_detector+0x30/0x30 [ 721.806314][ T1644] kthread+0x3b1/0x4a0 [ 721.810397][ T1644] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.816307][ T1644] ret_from_fork+0x1f/0x30 [ 721.820842][ T1644] Sending NMI from CPU 0 to CPUs 1: [ 721.827583][ C1] NMI backtrace for cpu 1 [ 721.827592][ C1] CPU: 1 PID: 8499 Comm: syz-executor237 Not tainted 5.11.0-rc1-syzkaller #0 [ 721.827601][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.827610][ C1] RIP: 0010:check_preemption_disabled+0x4c/0x150 [ 721.827621][ C1] Code: 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 44 00 00 9c <5b> 81 e3 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 74 d3 [ 721.827635][ C1] RSP: 0018:ffffc9000116eb28 EFLAGS: 00000046 [ 721.827646][ C1] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffffffff19df57b [ 721.827654][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 721.827662][ C1] RBP: ffffffff899e19c0 R08: ffffffff8712bec8 R09: ffff88802a2bb807 [ 721.827676][ C1] R10: ffffed1005457700 R11: 0000000000000000 R12: 0000000000000001 [ 721.827684][ C1] R13: ffffffff894ba140 R14: 00000000ffffffff R15: ffff88802a2bb890 [ 721.827692][ C1] FS: 0000000002344880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 721.827700][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 721.827707][ C1] CR2: 00007f46bdbea000 CR3: 0000000011a02000 CR4: 00000000001506e0 [ 721.827714][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 721.827723][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 721.827729][ C1] Call Trace: [ 721.827733][ C1] lock_is_held_type+0x34/0x100 [ 721.827738][ C1] ___might_sleep+0x23f/0x2c0 [ 721.827743][ C1] __mutex_lock+0xa9/0x1110 [ 721.827748][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 721.827753][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 721.827759][ C1] ? lockdep_hardirqs_on+0x79/0x100 [ 721.827765][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 721.827771][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.827777][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 721.827783][ C1] ? __radix_tree_lookup+0x81/0x290 [ 721.827789][ C1] ? wait_for_completion_io+0x260/0x260 [ 721.827794][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 721.827799][ C1] tcf_police_init+0x347/0x13a0 [ 721.827805][ C1] ? tcf_police_cleanup+0x60/0x60 [ 721.827810][ C1] ? find_held_lock+0x2d/0x110 [ 721.827815][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 721.827820][ C1] tcf_action_init_1+0x1a3/0x990 [ 721.827825][ C1] ? tcf_action_dump_old+0x80/0x80 [ 721.827830][ C1] ? lock_chain_count+0x20/0x20 [ 721.827835][ C1] ? find_held_lock+0x2d/0x110 [ 721.827840][ C1] ? cache_alloc_refill+0x1e7/0x380 [ 721.827845][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 721.827850][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 721.827856][ C1] tcf_exts_validate+0x138/0x420 [ 721.827860][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 721.827866][ C1] ? rcu_read_lock_sched_held+0x3a/0x70 [ 721.827871][ C1] ? trace_kmalloc+0xbe/0xf0 [ 721.827876][ C1] ? kmem_cache_alloc_trace+0x1f9/0x400 [ 721.827882][ C1] tcindex_set_parms+0x189/0x20d0 [ 721.827887][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 721.827894][ C1] ? tcindex_filter_result_init+0x200/0x200 [ 721.827900][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.827906][ C1] ? __nla_validate_parse+0x2d3/0x2ae0 [ 721.827911][ C1] ? nla_get_range_signed+0x520/0x520 [ 721.827917][ C1] ? find_held_lock+0x2d/0x110 [ 721.827922][ C1] ? tcindex_change+0x1b7/0x320 [ 721.827926][ C1] tcindex_change+0x212/0x320 [ 721.827932][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 721.827937][ C1] tc_new_tfilter+0x1394/0x2120 [ 721.827942][ C1] ? tcindex_set_parms+0x20d0/0x20d0 [ 721.827947][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 721.827952][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 721.827958][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 721.827963][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 721.827968][ C1] netlink_rcv_skb+0x153/0x420 [ 721.827973][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 721.827979][ C1] ? netlink_ack+0xaa0/0xaa0 [ 721.827984][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 721.827990][ C1] netlink_unicast+0x533/0x7d0 [ 721.827995][ C1] ? netlink_attachskb+0x870/0x870 [ 721.828001][ C1] ? _copy_from_iter_full+0x275/0x850 [ 721.828006][ C1] netlink_sendmsg+0x856/0xd90 [ 721.828011][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 721.828017][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.828023][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 721.828028][ C1] sock_sendmsg+0xcf/0x120 [ 721.828033][ C1] ____sys_sendmsg+0x6e8/0x810 [ 721.828038][ C1] ? kernel_sendmsg+0x50/0x50 [ 721.828042][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 721.828048][ C1] ? rcu_read_lock_sched_held+0x3a/0x70 [ 721.828053][ C1] ___sys_sendmsg+0xf3/0x170 [ 721.828058][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 721.828062][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 721.828067][ C1] ? _copy_to_user+0xdc/0x150 [ 721.828072][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.828077][ C1] ? move_addr_to_user+0xad/0x1e0 [ 721.828083][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.828088][ C1] ? __fget_light+0x215/0x280 [ 721.828093][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.828098][ C1] __sys_sendmsg+0xe5/0x1b0 [ 721.828102][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 721.828107][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.828112][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 721.828117][ C1] do_syscall_64+0x2d/0x70 [ 721.828121][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.828125][ C1] RIP: 0033:0x4439b9 [ 721.828133][ 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 [ 721.828145][ C1] RSP: 002b:00007ffe27684078 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 721.828159][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004439b9 [ 721.828168][ C1] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 721.828176][ C1] RBP: 00007ffe27684080 R08: 0000000100000000 R09: 0000000100000000 [ 721.828183][ C1] R10: 0000000100000000 R11: 0000000000000246 R12: 00000000000771c4 [ 721.828194][ C1] R13: 0000000000404890 R14: 0000000000000000 R15: 0000000000000000 [ 721.828207][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.496 msecs [ 721.828708][ T1644] Kernel panic - not syncing: hung_task: blocked tasks [ 722.439571][ T1644] CPU: 0 PID: 1644 Comm: khungtaskd Not tainted 5.11.0-rc1-syzkaller #0 [ 722.447900][ T1644] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.457953][ T1644] Call Trace: [ 722.461236][ T1644] dump_stack+0x107/0x163 [ 722.465578][ T1644] panic+0x306/0x73d [ 722.469512][ T1644] ? __warn_printk+0xf3/0xf3 [ 722.474123][ T1644] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.479334][ T1644] ? preempt_schedule_thunk+0x16/0x18 [ 722.484713][ T1644] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 722.490875][ T1644] ? watchdog.cold+0x5/0x158 [ 722.495502][ T1644] watchdog.cold+0x16/0x158 [ 722.500016][ T1644] ? reset_hung_task_detector+0x30/0x30 [ 722.505575][ T1644] kthread+0x3b1/0x4a0 [ 722.509648][ T1644] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.515548][ T1644] ret_from_fork+0x1f/0x30 [ 722.520821][ T1644] Kernel Offset: disabled [ 722.525150][ T1644] Rebooting in 86400 seconds..