====================================== | [ 800.715242][ T72] br0: port 1(vxlan0) entered disabled state | [ 800.759350][ T72] ------------[ cut here ]------------ | [ 800.759667][ T72] WARNING: CPU: 0 PID: 72 at net/core/dev.c:11120 unregister_netdevice_many_notify (net/core/dev.c:11120 (discriminator 1)) | [ 800.760207][ T72] Modules linked in: act_mirred act_tunnel_key bareudp mpls_iptunnel mpls_router xfrm_interface sha1_generic xfrm_user drop_monitor act_gact cls_flower sch_ingress netdevsim psample vxlan ip6_udp_tunnel udp_tunnel [ 800.761834][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 800.762550][ T72] Workqueue: netns cleanup_net [ 800.762805][ T72] RIP: 0010:unregister_netdevice_many_notify (net/core/dev.c:11120 (discriminator 1)) [ 800.763173][ T72] Code: 05 64 56 61 02 01 90 ba 32 1b 00 00 48 c7 c6 a0 9a 93 a4 48 c7 c7 00 9c 93 a4 e8 bf 59 08 fe 90 0f 0b 90 90 e9 8a fb ff ff 90 <0f> 0b 90 e9 aa fb ff ff e8 c7 5c 27 fe e9 37 fc ff ff 90 0f 0b 0f All code ======== 0: 05 64 56 61 02 add $0x2615664,%eax 5: 01 90 ba 32 1b 00 add %edx,0x1b32ba(%rax) b: 00 48 c7 add %cl,-0x39(%rax) e: c6 (bad) f: a0 9a 93 a4 48 c7 c7 movabs 0x9c00c7c748a4939a,%al 16: 00 9c 18: 93 xchg %eax,%ebx 19: a4 movsb %ds:(%rsi),%es:(%rdi) 1a: e8 bf 59 08 fe call 0xfffffffffe0859de 1f: 90 nop 20: 0f 0b ud2 22: 90 nop 23: 90 nop 24: e9 8a fb ff ff jmp 0xfffffffffffffbb3 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: e9 aa fb ff ff jmp 0xfffffffffffffbdc 32: e8 c7 5c 27 fe call 0xfffffffffe275cfe 37: e9 37 fc ff ff jmp 0xfffffffffffffc73 3c: 90 nop 3d: 0f 0b ud2 3f: 0f .byte 0xf Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: e9 aa fb ff ff jmp 0xfffffffffffffbb2 8: e8 c7 5c 27 fe call 0xfffffffffe275cd4 d: e9 37 fc ff ff jmp 0xfffffffffffffc49 12: 90 nop 13: 0f 0b ud2 15: 0f .byte 0xf [ 800.764309][ T72] RSP: 0018:ffffc9000051fb28 EFLAGS: 00010212 [ 800.764767][ T72] RAX: ffff888002125d18 RBX: ffff8880081b0000 RCX: ffffffffa18c7967 [ 800.765171][ T72] RDX: 1ffffffff4b6ff44 RSI: 0000000000000008 RDI: ffffffffa5b7fa20 [ 800.765649][ T72] RBP: ffff8880081b01c0 R08: 0000000000000000 R09: fffffbfff4b6ff44 [ 800.766054][ T72] R10: ffffffffa5b7fa27 R11: ffffc9000051f621 R12: ffff888004969440 [ 800.766611][ T72] R13: ffffc9000051fc00 R14: dffffc0000000000 R15: ffff888004969440 [ 800.767013][ T72] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 800.767630][ T72] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 800.767978][ T72] CR2: 00007fb22d81dd70 CR3: 0000000006442002 CR4: 0000000000770ef0 [ 800.768451][ T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 800.768855][ T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 800.769264][ T72] PKRU: 55555554 [ 800.769512][ T72] Call Trace: [ 800.769684][ T72] [ 800.769843][ T72] ? __warn (kernel/panic.c:677) [ 800.770060][ T72] ? unregister_netdevice_many_notify (net/core/dev.c:11120 (discriminator 1)) [ 800.770449][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 800.770698][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) [ 800.770926][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 800.771171][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 800.771550][ T72] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 800.771804][ T72] ? unregister_netdevice_many_notify (net/core/dev.c:11120 (discriminator 1)) [ 800.772138][ T72] ? unregister_netdevice_many_notify (net/core/dev.c:6962 net/core/dev.c:11120) [ 800.772583][ T72] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 800.772936][ T72] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 800.773184][ T72] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:569 net/ipv4/nexthop.c:1918 net/ipv4/nexthop.c:2426 net/ipv4/nexthop.c:3754) [ 800.773505][ T72] cleanup_net (net/core/net_namespace.c:633) [ 800.773740][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 800.774037][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 800.774299][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 800.774644][ T72] ? process_one_work (kernel/workqueue.c:2609) [ 800.774919][ T72] process_one_work (kernel/workqueue.c:2633) [ 800.775187][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 800.775529][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 800.775819][ T72] ? assign_work (kernel/workqueue.c:1101) [ 800.776066][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 800.776313][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 800.776744][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 800.777015][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 800.777348][ T72] kthread (kernel/kthread.c:388) [ 800.777572][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 800.777819][ T72] ret_from_fork (arch/x86/kernel/process.c:147) [ 800.778053][ T72] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: unregister_netdevice_many_notify:cleanup_net:process_one_work:worker_thread