====================================== | [ 332.079035] ------------[ cut here ]------------ | [ 332.079553] refcount_t: underflow; use-after-free. | [ 332.080229] WARNING: CPU: 3 PID: 10 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 332.081294] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 332.084777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 332.086342] Workqueue: netns cleanup_net [ 332.086941] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 332.087432] Code: 0b 90 90 c3 cc cc cc cc 80 3d 69 d4 67 01 00 0f 85 75 ff ff ff c6 05 5c d4 67 01 01 90 48 c7 c7 b8 37 73 92 e8 a1 26 b4 ff 90 <0f> 0b 90 90 c3 cc cc cc cc 80 3d 3c d4 67 01 00 0f 85 4a ff ff ff All code ======== 0: 0b 90 90 c3 cc cc or -0x33333c70(%rax),%edx 6: cc int3 7: cc int3 8: 80 3d 69 d4 67 01 00 cmpb $0x0,0x167d469(%rip) # 0x167d478 f: 0f 85 75 ff ff ff jne 0xffffffffffffff8a 15: c6 05 5c d4 67 01 01 movb $0x1,0x167d45c(%rip) # 0x167d478 1c: 90 nop 1d: 48 c7 c7 b8 37 73 92 mov $0xffffffff927337b8,%rdi 24: e8 a1 26 b4 ff call 0xffffffffffb426ca 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: c3 ret 2f: cc int3 30: cc int3 31: cc int3 32: cc int3 33: 80 3d 3c d4 67 01 00 cmpb $0x0,0x167d43c(%rip) # 0x167d476 3a: 0f 85 4a ff ff ff jne 0xffffffffffffff8a Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: c3 ret 5: cc int3 6: cc int3 7: cc int3 8: cc int3 9: 80 3d 3c d4 67 01 00 cmpb $0x0,0x167d43c(%rip) # 0x167d44c 10: 0f 85 4a ff ff ff jne 0xffffffffffffff60 [ 332.088873] RSP: 0018:ffffb01f8005bd78 EFLAGS: 00010286 [ 332.089275] RAX: 0000000000000000 RBX: ffff95c0c4306000 RCX: 00000000ffffdfff [ 332.089723] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 332.090088] RBP: ffff95c0c4306610 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 332.090479] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4306000 [ 332.090845] R13: ffffb01f8005be08 R14: ffff95c0c4306b80 R15: ffff95c0c2bf4550 [ 332.091211] FS: 0000000000000000(0000) GS:ffff95c0fed80000(0000) knlGS:0000000000000000 [ 332.091639] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 332.091942] CR2: 00007f56e7315d40 CR3: 0000000004cec005 CR4: 0000000000770ef0 [ 332.092309] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 332.092675] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 332.093032] PKRU: 55555554 [ 332.093178] Call Trace: [ 332.093317] <TASK> [ 332.093434] ? __warn (kernel/panic.c:677) [ 332.093605] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 332.093850] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 332.094043] ? handle_bug (arch/x86/kernel/traps.c:238) [ 332.094239] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 332.094439] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 332.094679] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 332.094919] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 332.095157] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 332.095362] br_dev_delete (net/bridge/br_if.c:396) [ 332.095554] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 332.095791] cleanup_net (net/core/net_namespace.c:630) [ 332.095984] ? process_one_work (kernel/workqueue.c:2606) [ 332.096201] process_one_work (kernel/workqueue.c:2633) [ 332.096412] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 332.096611] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 332.096841] kthread (kernel/kthread.c:388) [ 332.097011] ? __pfx_kthread (kernel/kthread.c:341) [ 332.097207] ret_from_fork (arch/x86/kernel/process.c:147) [ 332.097399] ? __pfx_kthread (kernel/kthread.c:341) [ 332.097594] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 332.100378] ------------[ cut here ]------------ | [ 332.100865] sysfs group 'bridge' not found for kobject 'br0' | [ 332.101589] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 332.102143] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 332.105375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 332.106527] Workqueue: netns cleanup_net [ 332.106975] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 332.107499] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 332.109343] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 332.109849] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 332.110589] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 332.111285] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 332.111974] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4306610 [ 332.112675] R13: ffffb01f8005be08 R14: ffff95c0c4306b80 R15: ffff95c0c2bf4550 [ 332.113412] FS: 0000000000000000(0000) GS:ffff95c0fed00000(0000) knlGS:0000000000000000 [ 332.114233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 332.114861] CR2: 00007fad13784000 CR3: 000000003aa60006 CR4: 0000000000770ef0 [ 332.115348] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 332.115739] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 332.116170] PKRU: 55555554 [ 332.116353] Call Trace: [ 332.116516] <TASK> [ 332.116683] ? __warn (kernel/panic.c:677) [ 332.116941] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 332.117299] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 332.117726] ? handle_bug (arch/x86/kernel/traps.c:238) [ 332.118044] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 332.118348] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 332.118844] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 332.119432] br_dev_delete (net/bridge/br_if.c:396) [ 332.119949] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 332.120539] cleanup_net (net/core/net_namespace.c:630) [ 332.121037] ? process_one_work (kernel/workqueue.c:2606) [ 332.121623] process_one_work (kernel/workqueue.c:2633) [ 332.122181] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 332.122683] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 332.123124] kthread (kernel/kthread.c:388) [ 332.123426] ? __pfx_kthread (kernel/kthread.c:341) [ 332.123797] ret_from_fork (arch/x86/kernel/process.c:147) [ 332.124239] ? __pfx_kthread (kernel/kthread.c:341) [ 332.124585] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 332.266885] ------------[ cut here ]------------ | [ 332.267208] sysfs group 'bridge' not found for kobject 'br0' | [ 332.267603] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 332.268192] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 332.270076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 332.270867] Workqueue: netns cleanup_net [ 332.271137] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 332.271482] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 332.272532] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 332.272805] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 332.273227] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 332.273585] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 332.273990] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4300610 [ 332.274474] R13: ffffb01f8005be08 R14: ffff95c0c4300b80 R15: ffff95c0c2758050 [ 332.274853] FS: 0000000000000000(0000) GS:ffff95c0fec00000(0000) knlGS:0000000000000000 [ 332.275354] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 332.275765] CR2: 00007f149cb21000 CR3: 000000003aa60003 CR4: 0000000000770ef0 [ 332.276271] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 332.276772] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 332.277275] PKRU: 55555554 [ 332.277470] Call Trace: [ 332.277662] <TASK> [ 332.277827] ? __warn (kernel/panic.c:677) [ 332.278064] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 332.278352] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 332.278607] ? handle_bug (arch/x86/kernel/traps.c:238) [ 332.278863] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 332.279138] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 332.279427] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 332.279738] br_dev_delete (net/bridge/br_if.c:396) [ 332.279988] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 332.280305] cleanup_net (net/core/net_namespace.c:630) [ 332.280541] ? process_one_work (kernel/workqueue.c:2606) [ 332.280848] process_one_work (kernel/workqueue.c:2633) [ 332.281117] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 332.281380] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 332.281610] kthread (kernel/kthread.c:388) [ 332.281785] ? __pfx_kthread (kernel/kthread.c:341) [ 332.281994] ret_from_fork (arch/x86/kernel/process.c:147) [ 332.282182] ? __pfx_kthread (kernel/kthread.c:341) [ 332.282394] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 342.265864] ------------[ cut here ]------------ | [ 342.266172] sysfs group 'bridge' not found for kobject 'br0' | [ 342.266515] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 342.266973] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 342.268416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 342.269056] Workqueue: netns cleanup_net [ 342.269293] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 342.269574] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 342.270571] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 342.270874] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 342.271279] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 342.271701] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 342.272168] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4fc4610 [ 342.272540] R13: ffffb01f8005be08 R14: ffff95c0c4fc4b80 R15: ffff95c0c4069750 [ 342.272939] FS: 0000000000000000(0000) GS:ffff95c0fec00000(0000) knlGS:0000000000000000 [ 342.273400] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 342.273726] CR2: 00007f27868c7000 CR3: 000000003aa60001 CR4: 0000000000770ef0 [ 342.274113] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 342.274541] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 342.274989] PKRU: 55555554 [ 342.275193] Call Trace: [ 342.275343] <TASK> [ 342.275503] ? __warn (kernel/panic.c:677) [ 342.275745] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 342.276038] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 342.276254] ? handle_bug (arch/x86/kernel/traps.c:238) [ 342.276458] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 342.276700] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 342.276982] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 342.277240] br_dev_delete (net/bridge/br_if.c:396) [ 342.277500] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 342.277792] cleanup_net (net/core/net_namespace.c:630) [ 342.278044] ? process_one_work (kernel/workqueue.c:2606) [ 342.278293] process_one_work (kernel/workqueue.c:2633) [ 342.278561] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 342.278830] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 342.279138] kthread (kernel/kthread.c:388) [ 342.279349] ? __pfx_kthread (kernel/kthread.c:341) [ 342.279600] ret_from_fork (arch/x86/kernel/process.c:147) [ 342.279858] ? __pfx_kthread (kernel/kthread.c:341) [ 342.280104] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 342.421878] ------------[ cut here ]------------ | [ 342.422166] sysfs group 'bridge' not found for kobject 'br0' | [ 342.422488] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 342.422951] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 342.424365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 342.424978] Workqueue: netns cleanup_net [ 342.425199] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 342.425450] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 342.426416] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 342.426707] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 342.427083] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 342.427461] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 342.427856] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4306610 [ 342.428238] R13: ffffb01f8005be08 R14: ffff95c0c4306b80 R15: ffff95c0c4225c50 [ 342.428625] FS: 0000000000000000(0000) GS:ffff95c0fed80000(0000) knlGS:0000000000000000 [ 342.429073] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 342.429390] CR2: 00007f25afd84d40 CR3: 0000000004cec004 CR4: 0000000000770ef0 [ 342.429787] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 342.430178] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 342.430557] PKRU: 55555554 [ 342.430727] Call Trace: [ 342.430874] <TASK> [ 342.430999] ? __warn (kernel/panic.c:677) [ 342.431180] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 342.431417] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 342.431626] ? handle_bug (arch/x86/kernel/traps.c:238) [ 342.431845] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 342.432057] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 342.432290] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 342.432530] br_dev_delete (net/bridge/br_if.c:396) [ 342.432742] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 342.432990] cleanup_net (net/core/net_namespace.c:630) [ 342.433199] ? process_one_work (kernel/workqueue.c:2606) [ 342.433425] process_one_work (kernel/workqueue.c:2633) [ 342.433663] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 342.433870] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 342.434091] kthread (kernel/kthread.c:388) [ 342.434261] ? __pfx_kthread (kernel/kthread.c:341) [ 342.434470] ret_from_fork (arch/x86/kernel/process.c:147) [ 342.434676] ? __pfx_kthread (kernel/kthread.c:341) [ 342.434872] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 351.229851] ------------[ cut here ]------------ | [ 351.230105] sysfs group 'bridge' not found for kobject 'br0' | [ 351.230410] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 351.230830] Modules linked in: cls_matchall act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 351.232233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 351.232854] Workqueue: netns cleanup_net [ 351.233154] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 351.233558] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 351.235112] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 351.235589] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 351.236192] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 351.236837] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 351.237333] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4fc2610 [ 351.237710] R13: ffffb01f8005be08 R14: ffff95c0c4fc2b80 R15: ffff95c0c2bf4550 [ 351.238130] FS: 0000000000000000(0000) GS:ffff95c0fed00000(0000) knlGS:0000000000000000 [ 351.238548] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 351.238853] CR2: 00007f2b46d132a8 CR3: 00000000026bc003 CR4: 0000000000770ef0 [ 351.239213] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 351.239578] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 351.239945] PKRU: 55555554 [ 351.240088] Call Trace: [ 351.240220] <TASK> [ 351.240341] ? __warn (kernel/panic.c:677) [ 351.240514] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 351.240740] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 351.240942] ? handle_bug (arch/x86/kernel/traps.c:238) [ 351.241144] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 351.241348] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 351.241569] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 351.241801] br_dev_delete (net/bridge/br_if.c:396) [ 351.241993] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 351.242221] cleanup_net (net/core/net_namespace.c:630) [ 351.242411] ? process_one_work (kernel/workqueue.c:2606) [ 351.242633] process_one_work (kernel/workqueue.c:2633) [ 351.242857] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 351.243056] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 351.243278] kthread (kernel/kthread.c:388) [ 351.243445] ? __pfx_kthread (kernel/kthread.c:341) [ 351.243653] ret_from_fork (arch/x86/kernel/process.c:147) [ 351.243844] ? __pfx_kthread (kernel/kthread.c:341) [ 351.244038] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 351.343931] ------------[ cut here ]------------ | [ 351.344317] sysfs group 'bridge' not found for kobject 'br0' | [ 351.344813] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 351.345435] Modules linked in: cls_matchall act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 351.347552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 351.348274] Workqueue: netns cleanup_net [ 351.348481] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 351.348734] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 351.349748] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 351.350022] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 351.350380] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 351.350877] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 351.351404] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4300610 [ 351.351764] R13: ffffb01f8005be08 R14: ffff95c0c4300b80 R15: ffff95c0c2bf0050 [ 351.352123] FS: 0000000000000000(0000) GS:ffff95c0fed00000(0000) knlGS:0000000000000000 [ 351.352527] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 351.352825] CR2: 00007f2b46d132a8 CR3: 000000003aa60004 CR4: 0000000000770ef0 [ 351.353183] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 351.353538] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 351.353900] PKRU: 55555554 [ 351.354044] Call Trace: [ 351.354177] <TASK> [ 351.354291] ? __warn (kernel/panic.c:677) [ 351.354463] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 351.354697] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 351.354891] ? handle_bug (arch/x86/kernel/traps.c:238) [ 351.355075] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 351.355272] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 351.355491] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 351.355717] br_dev_delete (net/bridge/br_if.c:396) [ 351.355908] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 351.356136] cleanup_net (net/core/net_namespace.c:630) [ 351.356326] ? process_one_work (kernel/workqueue.c:2606) [ 351.356541] process_one_work (kernel/workqueue.c:2633) [ 351.356758] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 351.356956] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 351.357176] kthread (kernel/kthread.c:388) [ 351.357343] ? __pfx_kthread (kernel/kthread.c:341) [ 351.357537] ret_from_fork (arch/x86/kernel/process.c:147) [ 351.357734] ? __pfx_kthread (kernel/kthread.c:341) [ 351.357927] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 363.487986] ------------[ cut here ]------------ | [ 363.488264] sysfs group 'bridge' not found for kobject 'br0' | [ 363.488576] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 363.489000] Modules linked in: cls_matchall act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 363.490501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 363.491120] Workqueue: netns cleanup_net [ 363.491387] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 363.491765] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 363.492737] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 363.493057] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 363.493472] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 363.493875] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 363.494263] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4fc4610 [ 363.494683] R13: ffffb01f8005be08 R14: ffff95c0c4fc4b80 R15: ffff95c0c2759750 [ 363.495098] FS: 0000000000000000(0000) GS:ffff95c0fec00000(0000) knlGS:0000000000000000 [ 363.495543] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 363.495868] CR2: 00007fe3ace6a270 CR3: 000000000268a004 CR4: 0000000000770ef0 [ 363.496291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 363.496717] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 363.497121] PKRU: 55555554 [ 363.497284] Call Trace: [ 363.497447] <TASK> [ 363.497615] ? __warn (kernel/panic.c:677) [ 363.497829] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 363.498064] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 363.498298] ? handle_bug (arch/x86/kernel/traps.c:238) [ 363.498541] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 363.498787] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 363.499030] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 363.499301] br_dev_delete (net/bridge/br_if.c:396) [ 363.499551] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 363.499823] cleanup_net (net/core/net_namespace.c:630) [ 363.500042] ? process_one_work (kernel/workqueue.c:2606) [ 363.500284] process_one_work (kernel/workqueue.c:2633) [ 363.500546] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 363.500786] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 363.501028] kthread (kernel/kthread.c:388) [ 363.501238] ? __pfx_kthread (kernel/kthread.c:341) [ 363.501497] ret_from_fork (arch/x86/kernel/process.c:147) [ 363.501744] ? __pfx_kthread (kernel/kthread.c:341) [ 363.501983] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 363.587866] ------------[ cut here ]------------ | [ 363.588131] sysfs group 'bridge' not found for kobject 'br0' | [ 363.588469] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 363.588931] Modules linked in: cls_matchall act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 363.590358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 363.590936] Workqueue: netns cleanup_net [ 363.591144] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 363.591389] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 363.592311] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 363.592578] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 363.592944] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 363.593306] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 363.593671] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c41ea610 [ 363.594029] R13: ffffb01f8005be08 R14: ffff95c0c41eab80 R15: ffff95c0c2bf0050 [ 363.594384] FS: 0000000000000000(0000) GS:ffff95c0fec00000(0000) knlGS:0000000000000000 [ 363.594805] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 363.595097] CR2: 00007fe3ace6a270 CR3: 000000003aa60006 CR4: 0000000000770ef0 [ 363.595454] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 363.595820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 363.596178] PKRU: 55555554 [ 363.596321] Call Trace: [ 363.596454] <TASK> [ 363.596571] ? __warn (kernel/panic.c:677) [ 363.596755] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 363.596975] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 363.597180] ? handle_bug (arch/x86/kernel/traps.c:238) [ 363.597366] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 363.597565] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 363.597795] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 363.598012] br_dev_delete (net/bridge/br_if.c:396) [ 363.598203] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 363.598433] cleanup_net (net/core/net_namespace.c:630) [ 363.598623] ? process_one_work (kernel/workqueue.c:2606) [ 363.598847] process_one_work (kernel/workqueue.c:2633) [ 363.599059] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 363.599257] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 363.599482] kthread (kernel/kthread.c:388) [ 363.599657] ? __pfx_kthread (kernel/kthread.c:341) [ 363.599853] ret_from_fork (arch/x86/kernel/process.c:147) [ 363.600044] ? __pfx_kthread (kernel/kthread.c:341) [ 363.600236] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 399.557996] ------------[ cut here ]------------ | [ 399.558283] sysfs group 'bridge' not found for kobject 'br0' | [ 399.559021] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 399.560114] Modules linked in: cls_matchall act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 399.563073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 399.564566] Workqueue: netns cleanup_net [ 399.565155] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 399.565890] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 399.568390] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 399.569156] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 399.570000] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 399.570626] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 399.571187] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c4fc4610 [ 399.571750] R13: ffffb01f8005be08 R14: ffff95c0c4fc4b80 R15: ffff95c0c275ae50 [ 399.572458] FS: 0000000000000000(0000) GS:ffff95c0fec80000(0000) knlGS:0000000000000000 [ 399.573263] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 399.573992] CR2: 00007ffc6caaaa78 CR3: 000000003aa60006 CR4: 0000000000770ef0 [ 399.574983] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 399.575960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 399.576976] PKRU: 55555554 [ 399.577435] Call Trace: [ 399.577880] <TASK> [ 399.578237] ? __warn (kernel/panic.c:677) [ 399.578789] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 399.579469] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 399.580092] ? handle_bug (arch/x86/kernel/traps.c:238) [ 399.580704] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 399.581303] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 399.581896] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 399.582543] br_dev_delete (net/bridge/br_if.c:396) [ 399.583085] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 399.583769] cleanup_net (net/core/net_namespace.c:630) [ 399.584198] ? process_one_work (kernel/workqueue.c:2606) [ 399.584758] process_one_work (kernel/workqueue.c:2633) [ 399.585310] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 399.585800] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 399.586142] kthread (kernel/kthread.c:388) [ 399.586448] ? __pfx_kthread (kernel/kthread.c:341) [ 399.586798] ret_from_fork (arch/x86/kernel/process.c:147) [ 399.587163] ? __pfx_kthread (kernel/kthread.c:341) [ 399.587514] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 399.710895] ------------[ cut here ]------------ | [ 399.711176] sysfs group 'bridge' not found for kobject 'br0' | [ 399.711498] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 399.711939] Modules linked in: cls_matchall act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel xt_mark sch_ingress act_mirred cls_basic sch_fq_codel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 399.713369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 399.713952] Workqueue: netns cleanup_net [ 399.714163] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 399.714708] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd 72 92 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: 41 5c pop %r12 6: e9 7a ad ff ff jmp 0xffffffffffffad85 b: 48 89 ef mov %rbp,%rdi e: e8 12 9b ff ff call 0xffffffffffff9b25 13: eb d1 jmp 0xffffffffffffffe6 15: 90 nop 16: 49 8b 14 24 mov (%r12),%rdx 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 cd 72 92 mov $0xffffffff9272cda0,%rdi 24: e8 ac 67 c5 ff call 0xffffffffffc567d5 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 5b pop %rbx 5: 5d pop %rbp 6: 41 5c pop %r12 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 399.715633] RSP: 0018:ffffb01f8005bd70 EFLAGS: 00010286 [ 399.715905] RAX: 0000000000000000 RBX: ffffffff923472c0 RCX: 00000000ffffdfff [ 399.716306] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 399.716684] RBP: 0000000000000000 R08: ffffffff92b78508 R09: 00000000ffffdfff [ 399.717102] R10: ffffffff92a98520 R11: ffffffff92b48520 R12: ffff95c0c41ec610 [ 399.717545] R13: ffffb01f8005be08 R14: ffff95c0c41ecb80 R15: ffff95c0c2bf0050 [ 399.717921] FS: 0000000000000000(0000) GS:ffff95c0fed00000(0000) knlGS:0000000000000000 [ 399.718337] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 399.718660] CR2: 00007f91163a68e8 CR3: 000000003aa60002 CR4: 0000000000770ef0 [ 399.719039] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 xx__-> [ 399.719492] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 399.719926] PKRU: 55555554 [ 399.720071] Call Trace: [ 399.720216] <TASK> [ 399.720341] ? __warn (kernel/panic.c:677) [ 399.720602] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 399.720856] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 399.721063] ? handle_bug (arch/x86/kernel/traps.c:238) [ 399.721262] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) xx__-> [ 399.721549] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 399.721838] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 399.722064] br_dev_delete (net/bridge/br_if.c:396) [ 399.722260] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 399.722493] cleanup_net (net/core/net_namespace.c:630) [ 399.722696] ? process_one_work (kernel/workqueue.c:2606) [ 399.722923] process_one_work (kernel/workqueue.c:2633) [ 399.723133] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 399.723348] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 399.723573] kthread (kernel/kthread.c:388) [ 399.723751] ? __pfx_kthread (kernel/kthread.c:341) [ 399.723947] ret_from_fork (arch/x86/kernel/process.c:147) [ 399.724137] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net