====================================== | [ 14.169290] ------------[ cut here ]------------ | [ 14.169585] refcount_t: underflow; use-after-free. | [ 14.169877] WARNING: CPU: 0 PID: 10 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 14.170361] Modules linked in: [ 14.170966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 14.171559] Workqueue: netns cleanup_net [ 14.171814] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 14.172119] 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 53 ba 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 53 ba mov $0xffffffffba5337b8,%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 [ 14.173076] RSP: 0018:ffffab6e0005bd78 EFLAGS: 00010286 [ 14.173374] RAX: 0000000000000000 RBX: ffff982ac3f58000 RCX: 00000000ffffdfff [ 14.173772] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 14.174171] RBP: ffff982ac3f58610 R08: ffffffffba978508 R09: 00000000ffffdfff [ 14.174557] R10: ffffffffba898520 R11: ffffffffba948520 R12: ffff982ac3f58000 [ 14.174930] R13: ffffab6e0005be08 R14: ffff982ac3f58b80 R15: ffff982ac3d32e50 [ 14.175324] FS: 0000000000000000(0000) GS:ffff982afec00000(0000) knlGS:0000000000000000 [ 14.175763] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.176099] CR2: 00007f37021d90e0 CR3: 000000002c660001 CR4: 0000000000770ef0 [ 14.176484] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 14.176875] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 14.177275] PKRU: 55555554 [ 14.177470] Call Trace: [ 14.177618] <TASK> [ 14.177757] ? __warn (kernel/panic.c:677) [ 14.177943] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 14.178226] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 14.178450] ? handle_bug (arch/x86/kernel/traps.c:238) [ 14.178650] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 14.178873] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 14.179142] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 14.179412] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 14.179665] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 14.179885] br_dev_delete (net/bridge/br_if.c:396) [ 14.180116] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 14.180390] cleanup_net (net/core/net_namespace.c:630) [ 14.180598] ? process_one_work (kernel/workqueue.c:2606) [ 14.180849] process_one_work (kernel/workqueue.c:2633) [ 14.181103] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 14.181324] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 14.181571] kthread (kernel/kthread.c:388) [ 14.181766] ? __pfx_kthread (kernel/kthread.c:341) [ 14.182006] ret_from_fork (arch/x86/kernel/process.c:147) [ 14.182221] ? __pfx_kthread (kernel/kthread.c:341) [ 14.182431] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 14.185078] ------------[ cut here ]------------ | [ 14.185349] sysfs group 'bridge' not found for kobject 'br0' | [ 14.185687] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 14.186121] Modules linked in: [ 14.186802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 14.187415] Workqueue: netns cleanup_net [ 14.187647] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 14.187905] 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 52 ba 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 52 ba mov $0xffffffffba52cda0,%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) ... [ 14.188879] RSP: 0018:ffffab6e0005bd70 EFLAGS: 00010286 [ 14.189231] RAX: 0000000000000000 RBX: ffffffffba1472c0 RCX: 00000000ffffdfff [ 14.189636] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 14.190052] RBP: 0000000000000000 R08: ffffffffba978508 R09: 00000000ffffdfff [ 14.190459] R10: ffffffffba898520 R11: ffffffffba948520 R12: ffff982ac3f58610 [ 14.190866] R13: ffffab6e0005be08 R14: ffff982ac3f58b80 R15: ffff982ac3d32e50 [ 14.191287] FS: 0000000000000000(0000) GS:ffff982afec00000(0000) knlGS:0000000000000000 [ 14.191761] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.192079] CR2: 00007f37021d90e0 CR3: 000000002c660001 CR4: 0000000000770ef0 [ 14.192484] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 14.192892] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 14.193302] PKRU: 55555554 [ 14.193486] Call Trace: [ 14.193627] <TASK> [ 14.193744] ? __warn (kernel/panic.c:677) [ 14.193914] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 14.194142] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 14.194338] ? handle_bug (arch/x86/kernel/traps.c:238) [ 14.194560] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 14.194823] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 14.195089] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 14.195328] br_dev_delete (net/bridge/br_if.c:396) [ 14.195540] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 14.195821] cleanup_net (net/core/net_namespace.c:630) [ 14.196061] ? process_one_work (kernel/workqueue.c:2606) [ 14.196313] process_one_work (kernel/workqueue.c:2633) [ 14.196552] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 14.196794] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 14.197076] kthread (kernel/kthread.c:388) [ 14.197269] ? __pfx_kthread (kernel/kthread.c:341) [ 14.197487] ret_from_fork (arch/x86/kernel/process.c:147) [ 14.197691] ? __pfx_kthread (kernel/kthread.c:341) [ 14.197904] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 26.438794] ------------[ cut here ]------------ | [ 26.439264] sysfs group 'bridge' not found for kobject 'br0' | [ 26.439833] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 26.440348] Modules linked in: [ 26.441074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 26.441690] Workqueue: netns cleanup_net [ 26.442007] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 26.442412] 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 52 ba 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 52 ba mov $0xffffffffba52cda0,%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) ... [ 26.443777] RSP: 0018:ffffab6e0005bd70 EFLAGS: 00010286 [ 26.444264] RAX: 0000000000000000 RBX: ffffffffba1472c0 RCX: 00000000ffffdfff [ 26.444917] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 26.445588] RBP: 0000000000000000 R08: ffffffffba978508 R09: 00000000ffffdfff [ 26.446289] R10: ffffffffba898520 R11: ffffffffba948520 R12: ffff982ac18ec610 [ 26.446964] R13: ffffab6e0005be08 R14: ffff982ac18ecb80 R15: ffff982ac3f10050 [ 26.447681] FS: 0000000000000000(0000) GS:ffff982afed80000(0000) knlGS:0000000000000000 [ 26.448420] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.448960] CR2: 00007fd9dc652000 CR3: 000000002c660001 CR4: 0000000000770ef0 [ 26.449570] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.450244] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.450856] PKRU: 55555554 [ 26.451098] Call Trace: [ 26.451331] <TASK> [ 26.451492] ? __warn (kernel/panic.c:677) [ 26.451778] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 26.452125] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 26.452467] ? handle_bug (arch/x86/kernel/traps.c:238) [ 26.452684] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 26.452885] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 26.453149] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 26.453395] br_dev_delete (net/bridge/br_if.c:396) [ 26.453671] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 26.453927] cleanup_net (net/core/net_namespace.c:630) [ 26.454240] ? process_one_work (kernel/workqueue.c:2606) [ 26.454508] process_one_work (kernel/workqueue.c:2633) [ 26.454730] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 26.454945] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 26.455311] kthread (kernel/kthread.c:388) [ 26.455611] ? __pfx_kthread (kernel/kthread.c:341) [ 26.455828] ret_from_fork (arch/x86/kernel/process.c:147) [ 26.456093] ? __pfx_kthread (kernel/kthread.c:341) [ 26.456395] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 38.726166] ------------[ cut here ]------------ | [ 38.726435] sysfs group 'bridge' not found for kobject 'br0' | [ 38.726808] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 38.727325] Modules linked in: [ 38.728287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 38.729265] Workqueue: netns cleanup_net [ 38.729634] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 38.730133] 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 52 ba 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 52 ba mov $0xffffffffba52cda0,%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) ... [ 38.731840] RSP: 0018:ffffab6e0005bd70 EFLAGS: 00010286 [ 38.732290] RAX: 0000000000000000 RBX: ffffffffba1472c0 RCX: 00000000ffffdfff [ 38.732898] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 38.733481] RBP: 0000000000000000 R08: ffffffffba978508 R09: 00000000ffffdfff [ 38.734062] R10: ffffffffba898520 R11: ffffffffba948520 R12: ffff982ac2e62610 [ 38.734646] R13: ffffab6e0005be08 R14: ffff982ac2e62b80 R15: ffff982ac2e85c50 [ 38.735246] FS: 0000000000000000(0000) GS:ffff982afed80000(0000) knlGS:0000000000000000 [ 38.735888] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.736285] CR2: 00007f87db41d000 CR3: 000000002c660005 CR4: 0000000000770ef0 [ 38.736904] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.737464] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.738017] PKRU: 55555554 [ 38.738247] Call Trace: [ 38.738465] <TASK> [ 38.738582] ? __warn (kernel/panic.c:677) [ 38.738844] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 38.739163] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 38.739487] ? handle_bug (arch/x86/kernel/traps.c:238) [ 38.739736] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 38.739938] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 38.740189] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 38.740460] br_dev_delete (net/bridge/br_if.c:396) [ 38.740705] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 38.740960] cleanup_net (net/core/net_namespace.c:630) [ 38.741277] ? process_one_work (kernel/workqueue.c:2606) [ 38.741495] process_one_work (kernel/workqueue.c:2633) [ 38.741709] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 38.741944] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 38.742292] kthread (kernel/kthread.c:388) [ 38.742543] ? __pfx_kthread (kernel/kthread.c:341) [ 38.742742] ret_from_fork (arch/x86/kernel/process.c:147) [ 38.743050] ? __pfx_kthread (kernel/kthread.c:341) [ 38.743359] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 50.963704] ------------[ cut here ]------------ | [ 50.963971] sysfs group 'bridge' not found for kobject 'br0' | [ 50.964344] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 50.964802] Modules linked in: [ 50.965488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 50.966105] Workqueue: netns cleanup_net [ 50.966392] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 50.966685] 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 52 ba 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 52 ba mov $0xffffffffba52cda0,%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) ... [ 50.967662] RSP: 0018:ffffab6e0005bd70 EFLAGS: 00010286 [ 50.967962] RAX: 0000000000000000 RBX: ffffffffba1472c0 RCX: 00000000ffffdfff [ 50.968378] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 50.968820] RBP: 0000000000000000 R08: ffffffffba978508 R09: 00000000ffffdfff [ 50.969251] R10: ffffffffba898520 R11: ffffffffba948520 R12: ffff982ac3eec610 [ 50.969635] R13: ffffab6e0005be08 R14: ffff982ac3eecb80 R15: ffff982ac2e84550 [ 50.970053] FS: 0000000000000000(0000) GS:ffff982afec00000(0000) knlGS:0000000000000000 [ 50.970524] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.970888] CR2: 00007f4bb3b87000 CR3: 000000002c660002 CR4: 0000000000770ef0 [ 50.971291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.971711] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.972174] PKRU: 55555554 [ 50.972374] Call Trace: [ 50.972530] <TASK> [ 50.972692] ? __warn (kernel/panic.c:677) [ 50.972926] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 50.973197] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 50.973416] ? handle_bug (arch/x86/kernel/traps.c:238) [ 50.973661] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 50.973934] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 50.974233] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 50.974496] br_dev_delete (net/bridge/br_if.c:396) [ 50.974740] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 50.975059] cleanup_net (net/core/net_namespace.c:630) [ 50.975336] ? process_one_work (kernel/workqueue.c:2606) [ 50.975583] process_one_work (kernel/workqueue.c:2633) [ 50.975874] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 50.976155] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 50.976457] kthread (kernel/kthread.c:388) [ 50.976673] ? __pfx_kthread (kernel/kthread.c:341) [ 50.976927] ret_from_fork (arch/x86/kernel/process.c:147) [ 50.977196] ? __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