INFO: task syz-executor.2:14225 blocked for more than 143 seconds. Not tainted 5.3.0-rc8+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28184 14225 13164 0x00004004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xd9/0x260 kernel/sched/core.c:3947 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4006 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 ovs_lock net/openvswitch/datapath.c:105 [inline] ovs_dp_cmd_new+0x579/0xea0 net/openvswitch/datapath.c:1613 genl_family_rcv_msg+0x74b/0xf90 net/netlink/genetlink.c:629 genl_rcv_msg+0xca/0x170 net/netlink/genetlink.c:654 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 genl_rcv+0x29/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 Code: Bad RIP value. RSP: 002b:00007f2579506c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25795076d4 R13: 00000000004c7777 R14: 00000000004dcfd8 R15: 00000000ffffffff INFO: task syz-executor.2:14226 blocked for more than 143 seconds. Not tainted 5.3.0-rc8+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28184 14226 13164 0x00004004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xd9/0x260 kernel/sched/core.c:3947 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4006 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 ovs_lock net/openvswitch/datapath.c:105 [inline] ovs_dp_cmd_new+0x579/0xea0 net/openvswitch/datapath.c:1613 genl_family_rcv_msg+0x74b/0xf90 net/netlink/genetlink.c:629 genl_rcv_msg+0xca/0x170 net/netlink/genetlink.c:654 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 genl_rcv+0x29/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 Code: Bad RIP value. RSP: 002b:00007f25794e5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25794e66d4 R13: 00000000004c7777 R14: 00000000004dcfd8 R15: 00000000ffffffff INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc8+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x9d0/0xef0 kernel/hung_task.c:289 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.3.0-rc8+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:try_to_wake_up+0x1df/0x1a90 kernel/sched/core.c:2464 Code: 3c 4d 8d 47 60 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 1d 16 00 00 41 8b 77 60 <85> f6 0f 85 ea 09 00 00 49 8d 7f 38 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffff8880ae809b28 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 1ffff11015d0136f RCX: 1ffffffff134b61e RDX: 1ffff110153470bc RSI: 0000000000000000 RDI: ffffffff89a57ef8 RBP: ffff8880ae809c00 R08: ffff8880a9a385e0 R09: 0000000000000000 R10: fffffbfff134afdf R11: ffffffff89a57eff R12: ffff8880a9a38590 R13: ffff8880ae809bd8 R14: ffff8880a9a385bc R15: ffff8880a9a38580 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000008e6c0000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: wake_up_process+0x10/0x20 kernel/sched/core.c:2548 wake_up_worker kernel/workqueue.c:841 [inline] insert_work+0x2b8/0x3b0 kernel/workqueue.c:1342 __queue_work+0x540/0x1270 kernel/workqueue.c:1491 delayed_work_timer_fn+0x5d/0x90 kernel/workqueue.c:1616 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x478/0x17a0 kernel/time/timer.c:1698 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1741 [inline] RIP: 0010:vprintk_emit+0x5df/0x700 kernel/printk/printk.c:1985 Code: 00 48 b8 00 00 00 00 00 fc ff df 41 80 3c 06 00 0f 85 f8 00 00 00 48 83 3d 2d e1 76 07 00 74 6a e8 d6 71 16 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 06 ff ff ff e8 c2 71 16 00 49 c1 ee 03 e8 b9 ed RSP: 0018:ffff8880a989f558 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a988a1c0 RBX: 0000000000000293 RCX: 1ffffffff134b61e RDX: 0000000000000000 RSI: ffffffff815c132a RDI: 0000000000000293 RBP: ffff8880a989f5a0 R08: ffff8880a988a1c0 R09: fffffbfff134afe0 R10: fffffbfff134afdf R11: ffffffff89a57eff R12: 0000000000000031 R13: 0000000000000200 R14: 1ffffffff11a5e8a R15: ffff8880a7da6380 vprintk_default+0x28/0x30 kernel/printk/printk.c:2013 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:386 printk+0xba/0xed kernel/printk/printk.c:2046 dynamic_kobj_release+0x24/0x30 lib/kobject.c:746 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put.cold+0x289/0x2e6 lib/kobject.c:739 batadv_sysfs_del_hardif+0x6f/0xb8 net/batman-adv/sysfs.c:1269 batadv_hardif_remove_interface+0x7d/0x170 net/batman-adv/hard-interface.c:971 batadv_hard_if_event+0x2cb/0xf80 net/batman-adv/hard-interface.c:1050 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95 __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1749 call_netdevice_notifiers_extack net/core/dev.c:1761 [inline] call_netdevice_notifiers net/core/dev.c:1775 [inline] rollback_registered_many+0x8d5/0xdf0 net/core/dev.c:8205 rollback_registered+0x109/0x1d0 net/core/dev.c:8247 unregister_netdevice_queue net/core/dev.c:9296 [inline] unregister_netdevice_queue+0x1ee/0x2c0 net/core/dev.c:9289 unregister_netdevice include/linux/netdevice.h:2631 [inline] internal_dev_destroy+0xc2/0x150 net/openvswitch/vport-internal_dev.c:223 ovs_vport_del+0x15e/0x1d0 net/openvswitch/vport.c:253 ovs_dp_detach_port+0x126/0x1a0 net/openvswitch/datapath.c:212 __dp_destroy+0x351/0x450 net/openvswitch/datapath.c:1681 ovs_exit_net+0x287/0xc30 net/openvswitch/datapath.c:2392 ops_exit_list.isra.0+0xaa/0x150 net/core/net_namespace.c:172 cleanup_net+0x4e2/0xa60 net/core/net_namespace.c:594 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352