====================================== | xx__-> [ 9.067998][ T174] ------------[ cut here ]------------ | [ 9.068208][ T174] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: ip/174 | [ 9.068471][ T174] Modules linked in: | [ 9.068834][ T174] Tainted: [W]=WARN [ 9.068923][ T174] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 9.069081][ T174] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3)) [ 9.069241][ T174] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 a8 cb f0 ff b9 a6 ff ff All code ======== 0: 89 fa mov %edi,%edx 2: 48 c1 ea 03 shr $0x3,%rdx 6: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx a: 48 89 f8 mov %rdi,%rax d: 83 e0 07 and $0x7,%eax 10: 83 c0 03 add $0x3,%eax 13: 38 d0 cmp %dl,%al 15: 7c 04 jl 0x1b 17: 84 d2 test %dl,%dl 19: 75 79 jne 0x94 1b: 48 8b 44 24 58 mov 0x58(%rsp),%rax 20: 44 8b 48 08 mov 0x8(%rax),%r9d 24: e9 42 ff ff ff jmp 0xffffffffffffff6b 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: ba 02 00 00 00 mov $0x2,%edx 32: 48 89 de mov %rbx,%rsi 35: 31 ff xor %edi,%edi 37: e8 a8 cb f0 ff call 0xfffffffffff0cbe4 3c: b9 .byte 0xb9 3d: a6 cmpsb (%rdi),(%rsi) 3e: ff (bad) 3f: ff .byte 0xff Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: ba 02 00 00 00 mov $0x2,%edx 8: 48 89 de mov %rbx,%rsi b: 31 ff xor %edi,%edi d: e8 a8 cb f0 ff call 0xfffffffffff0cbba 12: b9 .byte 0xb9 13: a6 cmpsb (%rdi),(%rsi) 14: ff (bad) 15: ff .byte 0xff [ 9.070088][ T174] RSP: 0018:ffa00000007d7aa8 EFLAGS: 00010286 [ 9.070239][ T174] RAX: 00000000ffffffa6 RBX: ff1100000d1e2dc0 RCX: 1ff40000000faf1b [ 9.070420][ T174] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000d1e2e70 [ 9.070595][ T174] RBP: ff11000009f31000 R08: 1fe2200001a3c5cf R09: ff1100000b24d180 [ 9.070815][ T174] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff [ 9.070990][ T174] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009f31000 [ 9.071170][ T174] FS: 00007f2470f2c840(0000) GS:ff11000079d79000(0000) knlGS:0000000000000000 [ 9.071385][ T174] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9.071536][ T174] CR2: 0000000000479648 CR3: 000000000ac11003 CR4: 0000000000771ef0 [ 9.071714][ T174] PKRU: 55555554 [ 9.071802][ T174] Call Trace: [ 9.071888][ T174] [ 9.071951][ T174] ? ip6_route_dev_notify (net/ipv6/route.c:6484) [ 9.072074][ T174] rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551) [ 9.072193][ T174] ? notifier_call_chain (kernel/notifier.c:85) [ 9.072320][ T174] rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560) [ 9.072411][ T174] register_netdevice (net/core/dev.c:11488) [ 9.072530][ T174] ? unregister_netdevice_queue (./include/linux/list.h:162) [ 9.072675][ T174] ? alloc_netdev_mqs (net/core/dev.c:12133) [ 9.072793][ T174] register_netdev (net/core/dev.c:11552) [ 9.072909][ T174] loopback_net_init (drivers/net/loopback.c:218) [ 9.073028][ T174] ops_init (net/core/net_namespace.c:137) [ 9.073123][ T174] setup_net (net/core/net_namespace.c:446) [ 9.073215][ T174] ? unregister_pernet_device (net/core/net_namespace.c:1503) [ 9.073338][ T174] ? lockdep_init_map_type (kernel/locking/lockdep.c:4973) [ 9.073456][ T174] ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185) [ 9.073581][ T174] copy_net_ns (net/core/net_namespace.c:579) [ 9.073701][ T174] create_new_namespaces (kernel/nsproxy.c:132) [ 9.073822][ T174] unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4)) [ 9.073939][ T174] ksys_unshare (kernel/fork.c:3243) [ 9.074065][ T174] ? walk_process_tree (kernel/fork.c:3036 (discriminator 19)) [ 9.074184][ T174] ? __ia32_sys_open (fs/open.c:1374) [ 9.074311][ T174] __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315) [ 9.074427][ T174] ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89) [ 9.074545][ T174] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) [ 9.074661][ T174] ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1)) [ 9.074778][ T174] ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3)) [ 9.074896][ T174] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) [ 9.075049][ T174] RIP: 0033:0x7f24711eebcb [ 9.075174][ T174] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48 All code ======== 0: 73 01 jae 0x3 2: c3 ret 3: 48 8b 0d 2d 82 0f 00 mov 0xf822d(%rip),%rcx # 0xf8237 a: f7 d8 neg %eax c: 64 89 01 mov %eax,%fs:(%rcx) f: 48 83 c8 ff or $0xffffffffffffffff,%rax 13: c3 ret 14: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 1b: 00 00 00 1e: 90 nop 1f: f3 0f 1e fa endbr64 23: b8 10 01 00 00 mov $0x110,%eax 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 8b 0d fd 81 0f 00 mov 0xf81fd(%rip),%rcx # 0xf8237 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 ret 9: 48 8b 0d fd 81 0f 00 mov 0xf81fd(%rip),%rcx # 0xf820d 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W [ 9.075603][ T174] RSP: 002b:00007ffe6130e8f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110 [ 9.075783][ T174] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f24711eebcb [ 9.075957][ T174] RDX: 0000000000000000 RSI: 0000000000477309 RDI: 0000000040000000 [ 9.076136][ T174] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 9.076318][ T174] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe61310b20 [ 9.076494][ T174] R13: 0000000000000001 R14: 00007f2470f2c6f8 R15: 00007ffe61312862 | [ 9.211275][ T173] ------------[ cut here ]------------ | [ 9.211670][ T173] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: python3/173 | [ 9.212113][ T173] Modules linked in: netdevsim | [ 9.212788][ T173] Tainted: [W]=WARN [ 9.212955][ T173] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 9.213207][ T173] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3)) [ 9.213480][ T173] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 a8 cb f0 ff b9 a6 ff ff All code ======== 0: 89 fa mov %edi,%edx 2: 48 c1 ea 03 shr $0x3,%rdx 6: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx a: 48 89 f8 mov %rdi,%rax d: 83 e0 07 and $0x7,%eax 10: 83 c0 03 add $0x3,%eax 13: 38 d0 cmp %dl,%al 15: 7c 04 jl 0x1b 17: 84 d2 test %dl,%dl 19: 75 79 jne 0x94 1b: 48 8b 44 24 58 mov 0x58(%rsp),%rax 20: 44 8b 48 08 mov 0x8(%rax),%r9d 24: e9 42 ff ff ff jmp 0xffffffffffffff6b 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: ba 02 00 00 00 mov $0x2,%edx 32: 48 89 de mov %rbx,%rsi 35: 31 ff xor %edi,%edi 37: e8 a8 cb f0 ff call 0xfffffffffff0cbe4 3c: b9 .byte 0xb9 3d: a6 cmpsb (%rdi),(%rsi) 3e: ff (bad) 3f: ff .byte 0xff Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: ba 02 00 00 00 mov $0x2,%edx 8: 48 89 de mov %rbx,%rsi b: 31 ff xor %edi,%edi d: e8 a8 cb f0 ff call 0xfffffffffff0cbba 12: b9 .byte 0xb9 13: a6 cmpsb (%rdi),(%rsi) 14: ff (bad) 15: ff .byte 0xff [ 9.214167][ T173] RSP: 0018:ffa0000000817500 EFLAGS: 00010286 [ 9.214430][ T173] RAX: 00000000ffffffa6 RBX: ff1100000d1d6340 RCX: 1ff4000000102e66 [ 9.214709][ T173] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000d1d63f0 [ 9.215019][ T173] RBP: ff1100000c81a000 R08: 1fe2200001a3ac7f R09: ff1100000b24af48 [ 9.215443][ T173] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff [ 9.215738][ T173] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000c81a000 [ 9.216015][ T173] FS: 00007f4670eb0400(0000) GS:ff11000079e79000(0000) knlGS:0000000000000000 [ 9.216369][ T173] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9.216614][ T173] CR2: 0000555b4d430c60 CR3: 000000000cca6002 CR4: 0000000000771ef0 [ 9.216899][ T173] PKRU: 55555554 [ 9.217080][ T173] Call Trace: [ 9.217245][ T173] [ 9.217389][ T173] rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551) [ 9.217600][ T173] rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560) [ 9.217767][ T173] register_netdevice (net/core/dev.c:11488) [ 9.217971][ T173] ? unregister_netdevice_queue (./include/linux/list.h:162) [ 9.218221][ T173] ? __debugfs_create_file (fs/debugfs/inode.c:412 fs/debugfs/inode.c:452) [ 9.218444][ T173] nsim_init_netdevsim (drivers/net/netdevsim/netdev.c:1069) netdevsim [ 9.218691][ T173] nsim_create (drivers/net/netdevsim/netdev.c:1151) netdevsim [ 9.218899][ T173] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1509) netdevsim [ 9.219152][ T173] ? add_timer_on (kernel/time/timer.c:925 (discriminator 5)) [ 9.219372][ T173] ? nsim_dev_get_vfs (drivers/net/netdevsim/dev.c:65) netdevsim [ 9.219614][ T173] ? is_module_address (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/linux/rcupdate.h:1181 (discriminator 2) kernel/module/main.c:3876 (discriminator 2)) [ 9.219821][ T173] ? static_obj (kernel/locking/lockdep.c:858) [ 9.219986][ T173] ? mark_held_locks (kernel/locking/lockdep.c:4325) [ 9.220203][ T173] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:713 ./include/linux/workqueue.h:855 drivers/net/netdevsim/hwstats.c:439) netdevsim [ 9.220462][ T173] nsim_drv_probe (drivers/net/netdevsim/dev.c:1570 drivers/net/netdevsim/dev.c:1731) netdevsim [ 9.220668][ T173] call_driver_probe (drivers/base/dd.c:629) [ 9.220872][ T173] really_probe (drivers/base/dd.c:709) [ 9.221081][ T173] ? driver_probe_device (drivers/base/dd.c:135) [ 9.221298][ T173] __driver_probe_device (drivers/base/dd.c:871) [ 9.221521][ T173] driver_probe_device (drivers/base/dd.c:901) [ 9.221725][ T173] __device_attach_driver (drivers/base/dd.c:1029) [ 9.221928][ T173] bus_for_each_drv (drivers/base/bus.c:500) [ 9.222137][ T173] ? bus_find_device_reverse (drivers/base/bus.c:442) [ 9.222358][ T173] __device_attach (drivers/base/dd.c:1101) [ 9.222563][ T173] ? __rwlock_init (kernel/locking/spinlock_debug.c:48) [ 9.222771][ T173] ? __driver_attach_async_helper (drivers/base/dd.c:1172 (discriminator 1)) [ 9.223012][ T173] ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) [ 9.223224][ T173] ? _raw_spin_unlock (./include/linux/spinlock_api_smp.h:169 (discriminator 1) kernel/locking/spinlock.c:190 (discriminator 1)) [ 9.223441][ T173] device_initial_probe (drivers/base/dd.c:1156) [ 9.223644][ T173] bus_probe_device (drivers/base/bus.c:613) [ 9.223847][ T173] device_add (drivers/base/core.c:3706) [ 9.224057][ T173] ? __fw_devlink_link_to_consumers.isra.0 (./include/linux/property.h:226 (discriminator 3)) [ 9.224316][ T173] ? __init_waitqueue_head (kernel/sched/wait.c:12) [ 9.224520][ T173] ? pm_runtime_init (drivers/base/power/runtime.c:1859) [ 9.224727][ T173] new_device_store (drivers/net/netdevsim/bus.c:471 drivers/net/netdevsim/bus.c:191) netdevsim [ 9.224969][ T173] ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535) [ 9.225180][ T173] ? new_port_store (drivers/net/netdevsim/bus.c:99) netdevsim [ 9.225435][ T173] ? sysfs_file_kobj (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/linux/rcupdate.h:1181 (discriminator 2) fs/sysfs/file.c:24 (discriminator 2)) [ 9.225638][ T173] ? sysfs_file_kobj (./include/linux/rcupdate.h:871 ./include/linux/rcupdate.h:1181 fs/sysfs/file.c:24) [ 9.225841][ T173] ? sysfs_file_ops (fs/sysfs/file.c:38 (discriminator 1)) [ 9.226053][ T173] kernfs_fop_write_iter (fs/kernfs/file.c:352) [ 9.226252][ T173] ? kernfs_ops (fs/kernfs/file.c:128) [ 9.226427][ T173] new_sync_write (fs/read_write.c:595) [ 9.226646][ T173] ? __lock_acquire (kernel/locking/lockdep.c:5237) [ 9.226846][ T173] ? new_sync_read (./include/linux/ioprio.h:41) [ 9.227055][ T173] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1)) [ 9.227254][ T173] ? ksys_write (fs/read_write.c:740) [ 9.227475][ T173] vfs_write (fs/read_write.c:688) [ 9.227639][ T173] ksys_write (fs/read_write.c:740) [ 9.227803][ T173] ? __ia32_sys_read (fs/read_write.c:724) [ 9.228002][ T173] ? kernfs_fop_llseek (fs/kernfs/file.c:908) [ 9.228213][ T173] ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3)) [ 9.228430][ T173] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) [ 9.228632][ T173] ? irq_exit_rcu (kernel/softirq.c:754) [ 9.228835][ T173] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) [ 9.229078][ T173] RIP: 0033:0x7f467103808e [ 9.229299][ T173] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa All code ======== 0: 4d 89 d8 mov %r11,%r8 3: e8 94 bd 00 00 call 0xbd9c 8: 4c 8b 5d f8 mov -0x8(%rbp),%r11 c: 41 8b 93 08 03 00 00 mov 0x308(%r11),%edx 13: 59 pop %rcx 14: 5e pop %rsi 15: 48 83 f8 fc cmp $0xfffffffffffffffc,%rax 19: 74 11 je 0x2c 1b: c9 leave 1c: c3 ret 1d: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 24: 48 8b 45 10 mov 0x10(%rbp),%rax 28: 0f 05 syscall 2a:* c9 leave <-- trapping instruction 2b: c3 ret 2c: 83 e2 39 and $0x39,%edx 2f: 83 fa 08 cmp $0x8,%edx 32: 75 e7 jne 0x1b 34: e8 03 ff ff ff call 0xffffffffffffff3c 39: 0f 1f 00 nopl (%rax) 3c: f3 0f 1e fa endbr64 Code starting with the faulting instruction =========================================== 0: c9 leave 1: c3 ret 2: 83 e2 39 and $0x39,%edx 5: 83 fa 08 cmp $0x8,%edx 8: 75 e7 jne 0xfffffffffffffff1 a: e8 03 ff ff ff call 0xffffffffffffff12 f: 0f 1f 00 nopl (%rax) 12: f3 0f 1e fa endbr64 [ 9.229887][ T173] RSP: 002b:00007ffe0d89f460 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 9.230173][ T173] RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f467103808e [ 9.230460][ T173] RDX: 0000000000000008 RSI: 000055c267ce3980 RDI: 0000000000000006 [ 9.230735][ T173] RBP: 00007ffe0d89f470 R08: 0000000000000000 R09: 0000000000000000 [ 9.231010][ T173] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f4670eb0390 [ 9.231303][ T173] R13: 000055c267ce3980 R14: 0000000000000006 R15: 00007f4670e3d0d0 | [ 9.676565][ T12] ------------[ cut here ]------------ | [ 9.676778][ T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: 0/12 | [ 9.677085][ T12] Modules linked in: netdevsim | [ 9.677599][ T12] Tainted: [W]=WARN [ 9.677725][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 9.677934][ T12] Workqueue: netns cleanup_net [ 9.678082][ T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3)) [ 9.678244][ T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 a8 cb f0 ff b9 a6 ff ff All code ======== 0: 89 fa mov %edi,%edx 2: 48 c1 ea 03 shr $0x3,%rdx 6: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx a: 48 89 f8 mov %rdi,%rax d: 83 e0 07 and $0x7,%eax 10: 83 c0 03 add $0x3,%eax 13: 38 d0 cmp %dl,%al 15: 7c 04 jl 0x1b 17: 84 d2 test %dl,%dl 19: 75 79 jne 0x94 1b: 48 8b 44 24 58 mov 0x58(%rsp),%rax 20: 44 8b 48 08 mov 0x8(%rax),%r9d 24: e9 42 ff ff ff jmp 0xffffffffffffff6b 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: ba 02 00 00 00 mov $0x2,%edx 32: 48 89 de mov %rbx,%rsi 35: 31 ff xor %edi,%edi 37: e8 a8 cb f0 ff call 0xfffffffffff0cbe4 3c: b9 .byte 0xb9 3d: a6 cmpsb (%rdi),(%rsi) 3e: ff (bad) 3f: ff .byte 0xff Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: ba 02 00 00 00 mov $0x2,%edx 8: 48 89 de mov %rbx,%rsi b: 31 ff xor %edi,%edi d: e8 a8 cb f0 ff call 0xfffffffffff0cbba 12: b9 .byte 0xb9 13: a6 cmpsb (%rdi),(%rsi) 14: ff (bad) 15: ff .byte 0xff [ 9.678750][ T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286 [ 9.678906][ T12] RAX: 00000000ffffffa6 RBX: ff1100000d256c40 RCX: 1ff4000000018ed5 [ 9.679084][ T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000d256cf0 [ 9.679309][ T12] RBP: ff11000009f31000 R08: 1fe2200001a4ad9f R09: ff11000001b051d0 [ 9.679487][ T12] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff [ 9.679664][ T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 [ 9.679839][ T12] FS: 0000000000000000(0000) GS:ff11000079df9000(0000) knlGS:0000000000000000 [ 9.680135][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9.680292][ T12] CR2: 00007fb5a52b8ab0 CR3: 000000000c9f6006 CR4: 0000000000771ef0 [ 9.680471][ T12] PKRU: 55555554 [ 9.680557][ T12] Call Trace: [ 9.680643][ T12] [ 9.680704][ T12] unregister_netdevice_many_notify (net/core/dev.c:12439) [ 9.680861][ T12] ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3)) [ 9.681009][ T12] ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3)) [ 9.681142][ T12] default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089) [ 9.681305][ T12] ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7)) [ 9.681427][ T12] ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3)) [ 9.681546][ T12] ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252) [ 9.681665][ T12] ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094) [ 9.681796][ T12] ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535) [ 9.681911][ T12] cleanup_net (net/core/net_namespace.c:702) [ 9.682025][ T12] ? net_passive_dec (./include/linux/llist.h:241) [ 9.682144][ T12] ? process_one_work (kernel/workqueue.c:3290 (discriminator 2)) [ 9.682266][ T12] ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22)) [ 9.682378][ T12] ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3)) [ 9.682497][ T12] process_one_work (kernel/workqueue.c:3314) [ 9.682616][ T12] ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4)) [ 9.682749][ T12] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1)) [ 9.682873][ T12] worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) [ 9.682993][ T12] ? rescuer_thread (./include/linux/list.h:404 (discriminator 3)) [ 9.683108][ T12] kthread (kernel/kthread.c:436) [ 9.683193][ T12] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22)) [ 9.683342][ T12] ? kthread_affine_node (kernel/kthread.c:378) [ 9.683458][ T12] ret_from_fork (arch/x86/kernel/process.c:158) [ 9.683585][ T12] ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37) [ 9.683730][ T12] ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663) [ 9.683848][ T12] ? kthread_affine_node (kernel/kthread.c:378) Finger prints: rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:register_netdev:loopback_net_init rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:default_device_exit_batch:ops_undo_list:cleanup_net rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:nsim_init_netdevsim:nsim_create