====================================== | [ 70.183929] ------------[ cut here ]------------ | [ 70.184194] refcount_t: underflow; use-after-free. | [ 70.184499] WARNING: CPU: 1 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 70.184934] Modules linked in: poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [ 70.186395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 70.187065] Workqueue: netns cleanup_net [ 70.187277] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 70.187547] 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 f3 88 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 f3 88 mov $0xffffffff88f337b8,%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 [ 70.188515] RSP: 0018:ffffab4080063d78 EFLAGS: 00010286 [ 70.188803] RAX: 0000000000000000 RBX: ffff96b004b62000 RCX: 00000000ffffdfff [ 70.189191] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 70.189554] RBP: ffff96b004b62610 R08: ffffffff89378508 R09: 00000000ffffdfff [ 70.189930] R10: ffffffff89298520 R11: ffffffff89348520 R12: ffff96b004b62000 [ 70.190323] R13: ffffab4080063e08 R14: ffff96b004b62b80 R15: ffff96b002df1750 [ 70.190703] FS: 0000000000000000(0000) GS:ffff96b03ec80000(0000) knlGS:0000000000000000 [ 70.191108] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.191455] CR2: 00007f566fd5c30d CR3: 0000000002ca8002 CR4: 0000000000770ef0 [ 70.191824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.192182] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.192567] PKRU: 55555554 [ 70.192716] Call Trace: [ 70.192858] <TASK> [ 70.192975] ? __warn (kernel/panic.c:677) [ 70.193149] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 70.193387] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 70.193612] ? handle_bug (arch/x86/kernel/traps.c:238) [ 70.193805] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 70.194005] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 70.194226] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 70.194463] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 70.194735] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 70.194928] br_dev_delete (net/bridge/br_if.c:396) [ 70.195117] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 70.195348] cleanup_net (net/core/net_namespace.c:630) [ 70.195539] ? process_one_work (kernel/workqueue.c:2606) [ 70.195763] process_one_work (kernel/workqueue.c:2633) [ 70.195999] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 70.196196] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 70.196415] kthread (kernel/kthread.c:388) [ 70.196584] ? __pfx_kthread (kernel/kthread.c:341) [ 70.196796] ret_from_fork (arch/x86/kernel/process.c:147) [ 70.197017] ? __pfx_kthread (kernel/kthread.c:341) [ 70.197211] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 70.199775] ------------[ cut here ]------------ | [ 70.200055] sysfs group 'bridge' not found for kobject 'br0' | [ 70.200395] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 70.201056] Modules linked in: poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [ 70.202104] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 70.203292] Workqueue: netns cleanup_net [ 70.203706] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 70.204232] 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 f2 88 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 f2 88 mov $0xffffffff88f2cda0,%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) ... [ 70.205761] RSP: 0018:ffffab4080063d70 EFLAGS: 00010286 [ 70.206421] RAX: 0000000000000000 RBX: ffffffff88b472c0 RCX: 00000000ffffdfff [ 70.207223] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 70.207986] RBP: 0000000000000000 R08: ffffffff89378508 R09: 00000000ffffdfff [ 70.208871] R10: ffffffff89298520 R11: ffffffff89348520 R12: ffff96b004b62610 [ 70.209694] R13: ffffab4080063e08 R14: ffff96b004b62b80 R15: ffff96b002df1750 [ 70.210489] FS: 0000000000000000(0000) GS:ffff96b03ec80000(0000) knlGS:0000000000000000 [ 70.211411] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.211795] CR2: 00007f566fd5c30d CR3: 0000000024260005 CR4: 0000000000770ef0 [ 70.212248] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.212604] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.213159] PKRU: 55555554 [ 70.213369] Call Trace: [ 70.213624] <TASK> [ 70.213857] ? __warn (kernel/panic.c:677) [ 70.214031] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 70.214352] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 70.214660] ? handle_bug (arch/x86/kernel/traps.c:238) [ 70.215087] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 70.215513] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 70.215979] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 70.216447] br_dev_delete (net/bridge/br_if.c:396) [ 70.216815] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 70.217357] cleanup_net (net/core/net_namespace.c:630) [ 70.217755] ? process_one_work (kernel/workqueue.c:2606) [ 70.218200] process_one_work (kernel/workqueue.c:2633) [ 70.218671] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 70.219086] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 70.219613] kthread (kernel/kthread.c:388) [ 70.219959] ? __pfx_kthread (kernel/kthread.c:341) [ 70.220351] ret_from_fork (arch/x86/kernel/process.c:147) [ 70.220819] ? __pfx_kthread (kernel/kthread.c:341) [ 70.221292] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 82.501829] ------------[ cut here ]------------ | [ 82.502387] sysfs group 'bridge' not found for kobject 'br0' | [ 82.502827] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 82.503316] Modules linked in: poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [ 82.504730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 82.505863] Workqueue: netns cleanup_net [ 82.506298] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 82.506798] 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 f2 88 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 f2 88 mov $0xffffffff88f2cda0,%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) ... [ 82.508198] RSP: 0018:ffffab4080063d70 EFLAGS: 00010286 [ 82.508731] RAX: 0000000000000000 RBX: ffffffff88b472c0 RCX: 00000000ffffdfff [ 82.509450] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 82.510149] RBP: 0000000000000000 R08: ffffffff89378508 R09: 00000000ffffdfff [ 82.510864] R10: ffffffff89298520 R11: ffffffff89348520 R12: ffff96b002496610 [ 82.511615] R13: ffffab4080063e08 R14: ffff96b002496b80 R15: ffff96b002468050 [ 82.512336] FS: 0000000000000000(0000) GS:ffff96b03ed80000(0000) knlGS:0000000000000000 [ 82.513097] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.513679] CR2: 000055a10df21dec CR3: 0000000024260001 CR4: 0000000000770ef0 [ 82.514407] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.515068] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.515785] PKRU: 55555554 [ 82.516045] Call Trace: [ 82.516315] <TASK> [ 82.516525] ? __warn (kernel/panic.c:677) [ 82.516821] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 82.517040] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 82.517237] ? handle_bug (arch/x86/kernel/traps.c:238) [ 82.517520] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 82.517730] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 82.517953] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 82.518174] br_dev_delete (net/bridge/br_if.c:396) [ 82.518433] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 82.518803] cleanup_net (net/core/net_namespace.c:630) [ 82.519145] ? process_one_work (kernel/workqueue.c:2606) [ 82.519435] process_one_work (kernel/workqueue.c:2633) [ 82.519712] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 82.520063] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 82.520528] kthread (kernel/kthread.c:388) [ 82.520867] ? __pfx_kthread (kernel/kthread.c:341) [ 82.521232] ret_from_fork (arch/x86/kernel/process.c:147) [ 82.521590] ? __pfx_kthread (kernel/kthread.c:341) [ 82.521975] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 94.907816] ------------[ cut here ]------------ | [ 94.908091] sysfs group 'bridge' not found for kobject 'br0' | [ 94.908445] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 94.908872] Modules linked in: poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [ 94.909869] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 94.910487] Workqueue: netns cleanup_net [ 94.910740] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 94.911008] 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 f2 88 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 f2 88 mov $0xffffffff88f2cda0,%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) ... [ 94.911959] RSP: 0018:ffffab4080063d70 EFLAGS: 00010286 [ 94.912276] RAX: 0000000000000000 RBX: ffffffff88b472c0 RCX: 00000000ffffdfff [ 94.912694] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 94.913077] RBP: 0000000000000000 R08: ffffffff89378508 R09: 00000000ffffdfff [ 94.913469] R10: ffffffff89298520 R11: ffffffff89348520 R12: ffff96b004b90610 [ 94.913870] R13: ffffab4080063e08 R14: ffff96b004b90b80 R15: ffff96b004b82e50 [ 94.914256] FS: 0000000000000000(0000) GS:ffff96b03ec00000(0000) knlGS:0000000000000000 [ 94.914684] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.915008] CR2: 00007fad6cf8e1b4 CR3: 00000000018b4006 CR4: 0000000000770ef0 [ 94.915402] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.915807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.916180] PKRU: 55555554 [ 94.916358] Call Trace: [ 94.916535] <TASK> [ 94.916695] ? __warn (kernel/panic.c:677) [ 94.916883] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 94.917137] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 94.917388] ? handle_bug (arch/x86/kernel/traps.c:238) [ 94.917605] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 94.917826] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 94.918096] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 94.918357] br_dev_delete (net/bridge/br_if.c:396) [ 94.918589] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 94.918852] cleanup_net (net/core/net_namespace.c:630) [ 94.919094] ? process_one_work (kernel/workqueue.c:2606) [ 94.919351] process_one_work (kernel/workqueue.c:2633) [ 94.919597] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 94.919821] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 94.920075] kthread (kernel/kthread.c:388) [ 94.920295] ? __pfx_kthread (kernel/kthread.c:341) [ 94.920517] ret_from_fork (arch/x86/kernel/process.c:147) [ 94.920734] ? __pfx_kthread (kernel/kthread.c:341) [ 94.920969] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 107.432374] ------------[ cut here ]------------ | [ 107.432698] sysfs group 'bridge' not found for kobject 'br0' | [ 107.433012] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 107.433439] Modules linked in: poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [ 107.434466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 107.435131] Workqueue: netns cleanup_net [ 107.435409] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 107.435707] 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 f2 88 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 f2 88 mov $0xffffffff88f2cda0,%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) ... [ 107.436675] RSP: 0018:ffffab4080063d70 EFLAGS: 00010286 [ 107.436990] RAX: 0000000000000000 RBX: ffffffff88b472c0 RCX: 00000000ffffdfff [ 107.437423] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 107.437797] RBP: 0000000000000000 R08: ffffffff89378508 R09: 00000000ffffdfff [ 107.438158] R10: ffffffff89298520 R11: ffffffff89348520 R12: ffff96b001936610 [ 107.438552] R13: ffffab4080063e08 R14: ffff96b001936b80 R15: ffff96b002f54550 [ 107.438958] FS: 0000000000000000(0000) GS:ffff96b03ec00000(0000) knlGS:0000000000000000 [ 107.439398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.439768] CR2: 00007fc716a5ea30 CR3: 0000000024260005 CR4: 0000000000770ef0 [ 107.440176] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 107.440579] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 107.441025] PKRU: 55555554 [ 107.441222] Call Trace: [ 107.441412] <TASK> [ 107.441599] ? __warn (kernel/panic.c:677) [ 107.441802] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 107.442092] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 107.442347] ? handle_bug (arch/x86/kernel/traps.c:238) [ 107.442731] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 107.442984] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 107.443231] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 107.443501] br_dev_delete (net/bridge/br_if.c:396) [ 107.443764] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 107.444081] cleanup_net (net/core/net_namespace.c:630) [ 107.444297] ? process_one_work (kernel/workqueue.c:2606) [ 107.444589] process_one_work (kernel/workqueue.c:2633) [ 107.444877] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 107.445131] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 107.445401] kthread (kernel/kthread.c:388) [ 107.445594] ? __pfx_kthread (kernel/kthread.c:341) [ 107.445800] ret_from_fork (arch/x86/kernel/process.c:147) [ 107.445993] ? __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