INFO: task syz-executor.1:25482 blocked for more than 143 seconds. Not tainted 5.4.0-rc7+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27968 25482 24206 0x00004004 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x909/0x1ee0 kernel/sched/core.c:4078 schedule+0xd9/0x260 kernel/sched/core.c:4145 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4204 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 ovs_lock net/openvswitch/datapath.c:105 [inline] ovs_dp_cmd_new+0x5d9/0xe30 net/openvswitch/datapath.c:1642 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+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: 03 00 00 48 29 f0 48 3d f8 12 00 00 76 7d 48 81 ec 08 10 00 00 48 89 ac 24 00 10 00 00 48 8d ac 24 00 10 00 00 48 8b 59 20 48 <85> db 75 67 48 8b b4 24 20 10 00 00 8b 8c 24 28 10 00 00 48 89 e7 RSP: 002b:00007f029faa0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f029faa16d4 R13: 00000000004c8b17 R14: 00000000004df0f0 R15: 00000000ffffffff INFO: task syz-executor.2:25492 blocked for more than 143 seconds. Not tainted 5.4.0-rc7+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27264 25492 25390 0x00004004 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x909/0x1ee0 kernel/sched/core.c:4078 schedule+0xd9/0x260 kernel/sched/core.c:4145 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4204 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 ovs_lock net/openvswitch/datapath.c:105 [inline] ovs_dp_cmd_new+0x5d9/0xe30 net/openvswitch/datapath.c:1642 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+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: Bad RIP value. RSP: 002b:00007f7755714c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f77557156d4 R13: 00000000004c8b17 R14: 00000000004df0f0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1071: #0: ffffffff88fab980 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5337 8 locks held by kworker/u4:3/2547: 2 locks held by getty/8745: #0: ffff8880899b4090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f252e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8746: #0: ffff8880a3cd1090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8747: #0: ffff8880a2fbe090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f412e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8748: #0: ffff8880a1685090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8749: #0: ffff88808e943090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f2d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8750: #0: ffff8880a0c2d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8751: #0: ffff88809bb8e090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f112e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.1/25482: #0: ffffffff899f3368 (cb_lock){++++}, at: genl_rcv+0x1a/0x40 net/netlink/genetlink.c:664 #1: ffffffff89bf17e0 (ovs_mutex){+.+.}, at: ovs_lock net/openvswitch/datapath.c:105 [inline] #1: ffffffff89bf17e0 (ovs_mutex){+.+.}, at: ovs_dp_cmd_new+0x5d9/0xe30 net/openvswitch/datapath.c:1642 2 locks held by syz-executor.2/25492: #0: ffffffff899f3368 (cb_lock){++++}, at: genl_rcv+0x1a/0x40 net/netlink/genetlink.c:664 #1: ffffffff89bf17e0 (ovs_mutex){+.+.}, at: ovs_lock net/openvswitch/datapath.c:105 [inline] #1: ffffffff89bf17e0 (ovs_mutex){+.+.}, at: ovs_dp_cmd_new+0x5d9/0xe30 net/openvswitch/datapath.c:1642 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1071 Comm: khungtaskd Not tainted 5.4.0-rc7+ #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+0x197/0x210 lib/dump_stack.c:118 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2547 Comm: kworker/u4:3 Not tainted 5.4.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:memcpy_erms+0x8/0x10 arch/x86/lib/memcpy_64.S:57 Code: 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe 7c 35 RSP: 0018:ffff8880ae909be8 EFLAGS: 00000246 RAX: ffff888090ff28c8 RBX: 000000000000fb88 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffff888088faf916 RDI: ffff888090ff28ce RBP: ffff8880ae909c08 R08: 1ffff110121fe519 R09: ffffed10121fe51a R10: ffffed10121fe519 R11: ffff888090ff28cd R12: 0000000000000006 R13: ffff888090ff28c8 R14: ffff888088faf910 R15: ffff88806cea4c58 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000dcb008 CR3: 00000000a032c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: memcpy include/linux/string.h:378 [inline] eth_header+0xfe/0x1f0 net/ethernet/eth.c:96 dev_hard_header include/linux/netdevice.h:2908 [inline] send_hsr_supervision_frame+0x380/0xf20 net/hsr/hsr_device.c:265 hsr_announce+0x12f/0x3b0 net/hsr/hsr_device.c:334 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __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:536 [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:756 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1751 [inline] RIP: 0010:vprintk_emit+0x5df/0x700 kernel/printk/printk.c:1995 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 4d 4f 96 07 00 74 6a e8 16 83 16 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 06 ff ff ff e8 02 83 16 00 49 c1 ee 03 e8 c9 fc RSP: 0018:ffff8880a21bf660 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a21b4640 RBX: 0000000000000293 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff815cd4da RDI: 0000000000000293 RBP: ffff8880a21bf6a8 R08: 1ffffffff14f0137 R09: fffffbfff14f0138 R10: fffffbfff14f0137 R11: ffffffff8a7809bf R12: 000000000000003b R13: 0000000000000200 R14: 1ffffffff11e6484 R15: ffff8880a7d8c700 vprintk_default+0x28/0x30 kernel/printk/printk.c:2023 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:386 printk+0xba/0xed kernel/printk/printk.c:2056 kobject_cleanup lib/kobject.c:691 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put.cold+0x266/0x2e6 lib/kobject.c:739 kset_unregister lib/kobject.c:881 [inline] kset_unregister+0x2c/0x40 lib/kobject.c:876 remove_queue_kobjects net/core/net-sysfs.c:1560 [inline] netdev_unregister_kobject+0x188/0x1f0 net/core/net-sysfs.c:1708 rollback_registered_many+0x7c6/0xfc0 net/core/dev.c:8546 rollback_registered+0x109/0x1d0 net/core/dev.c:8564 unregister_netdevice_queue net/core/dev.c:9656 [inline] unregister_netdevice_queue+0x1ee/0x2c0 net/core/dev.c:9649 unregister_netdevice include/linux/netdevice.h:2637 [inline] internal_dev_destroy+0xc2/0x150 net/openvswitch/vport-internal_dev.c:220 ovs_vport_del+0x15e/0x1d0 net/openvswitch/vport.c:253 ovs_dp_detach_port+0x126/0x1b0 net/openvswitch/datapath.c:212 __dp_destroy+0x351/0x450 net/openvswitch/datapath.c:1710 ovs_exit_net+0x287/0xc40 net/openvswitch/datapath.c:2425 ops_exit_list.isra.0+0xb1/0x160 net/core/net_namespace.c:172 cleanup_net+0x538/0xaf0 net/core/net_namespace.c:597 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