====================================== | [ 970.094366][ T69] ================================================================== | [ 970.094838][ T69] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 970.095225][ T69] Read of size 1 at addr ffff88800550d33c by task kworker/u8:1/69 | [ 970.095628][ T69] [ 970.096171][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 970.096807][ T69] Workqueue: netns cleanup_net [ 970.097072][ T69] Call Trace: [ 970.097260][ T69] [ 970.097418][ T69] dump_stack_lvl (lib/dump_stack.c:107) [ 970.097662][ T69] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 970.098008][ T69] ? kobject_put (lib/kobject.c:729) [ 970.098243][ T69] print_report (mm/kasan/report.c:489) [ 970.098482][ T69] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) [ 970.098746][ T69] kasan_report (mm/kasan/report.c:603) [ 970.098974][ T69] ? kobject_put (lib/kobject.c:729) [ 970.099208][ T69] kobject_put (lib/kobject.c:729) [ 970.099434][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 970.099671][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 970.099915][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 970.100195][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 970.100429][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 970.100732][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 970.100997][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 970.101241][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 970.101512][ T69] process_one_work (kernel/workqueue.c:2638) [ 970.101774][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 970.102013][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 970.102294][ T69] ? assign_work (kernel/workqueue.c:1101) [ 970.102536][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 970.102785][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 970.103132][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.103404][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.103675][ T69] kthread (kernel/kthread.c:388) [ 970.103892][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.104133][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 970.104372][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.104613][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 970.123353][ T69] ------------[ cut here ]------------ | [ 970.123737][ T69] refcount_t: underflow; use-after-free. | [ 970.124079][ T69] WARNING: CPU: 0 PID: 69 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 970.124597][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 970.125966][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 970.126630][ T69] Workqueue: netns cleanup_net [ 970.126927][ T69] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 970.127309][ T69] Code: f9 82 03 80 fb 01 0f 87 ee 02 b1 01 83 e3 01 0f 85 4d ff ff ff c6 05 9a f9 82 03 01 90 48 c7 c7 20 7a e2 9b e8 3e 05 2a ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 8c 68 a6 ff e9 b6 fe ff ff All code ======== 0: f9 stc 1: 82 (bad) 2: 03 80 fb 01 0f 87 add -0x78f0fe05(%rax),%eax 8: ee out %al,(%dx) 9: 02 b1 01 83 e3 01 add 0x1e38301(%rcx),%dh f: 0f 85 4d ff ff ff jne 0xffffffffffffff62 15: c6 05 9a f9 82 03 01 movb $0x1,0x382f99a(%rip) # 0x382f9b6 1c: 90 nop 1d: 48 c7 c7 20 7a e2 9b mov $0xffffffff9be27a20,%rdi 24: e8 3e 05 2a ff call 0xffffffffff2a0567 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: e9 2f ff ff ff jmp 0xffffffffffffff62 33: 48 89 df mov %rbx,%rdi 36: e8 8c 68 a6 ff call 0xffffffffffa668c7 3b: e9 b6 fe ff ff jmp 0xfffffffffffffef6 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: e9 2f ff ff ff jmp 0xffffffffffffff38 9: 48 89 df mov %rbx,%rdi c: e8 8c 68 a6 ff call 0xffffffffffa6689d 11: e9 b6 fe ff ff jmp 0xfffffffffffffecc [ 970.128366][ T69] RSP: 0018:ffffc900004ffb98 EFLAGS: 00010282 [ 970.128740][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9911056f [ 970.129193][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 970.129653][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff5200009ff18 [ 970.130124][ T69] R10: ffffc900004ff8c7 R11: 205d393654202020 R12: ffff888007f42000 [ 970.130585][ T69] R13: ffff888007f42df8 R14: ffffc900004ffc98 R15: ffff888007f42bc0 [ 970.131026][ T69] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 970.131531][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 970.131936][ T69] CR2: 000056554ee40900 CR3: 0000000019534005 CR4: 00000000001706f0 [ 970.132383][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 970.132837][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 970.133250][ T69] Call Trace: [ 970.133431][ T69] [ 970.133589][ T69] ? __warn (kernel/panic.c:677) [ 970.133807][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 970.134104][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 970.134357][ T69] ? vprintk_emit (kernel/printk/printk.c:2313) [ 970.134614][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 970.134845][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 970.135094][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 970.135393][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 970.135674][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 970.136023][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 970.136349][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 970.136630][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 970.136925][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 970.137208][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 970.137450][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 970.137794][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 970.138106][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 970.138386][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 970.138693][ T69] process_one_work (kernel/workqueue.c:2638) [ 970.138999][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 970.139293][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 970.139616][ T69] ? assign_work (kernel/workqueue.c:1101) [ 970.139891][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 970.140172][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 970.140577][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.140886][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.141178][ T69] kthread (kernel/kthread.c:388) [ 970.141440][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.141734][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 970.142006][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.142274][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 970.145343][ T69] ------------[ cut here ]------------ | [ 970.145633][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 970.146050][ T69] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 970.146585][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 970.147960][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 970.148638][ T69] Workqueue: netns cleanup_net [ 970.148909][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 970.149243][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 970.150292][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 970.150669][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 970.151115][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 970.151575][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 970.152035][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888007f42628 [ 970.152504][ T69] R13: ffff888007f42df8 R14: ffffc900004ffc98 R15: ffff888007f42bc0 [ 970.152945][ T69] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 970.153464][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 970.153856][ T69] CR2: 000056554ee40900 CR3: 0000000019534005 CR4: 00000000001706f0 [ 970.154311][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 970.154761][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 970.155225][ T69] Call Trace: [ 970.155416][ T69] [ 970.155611][ T69] ? __warn (kernel/panic.c:677) [ 970.155863][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 970.156146][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 970.156464][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 970.156764][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 970.157022][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 970.157296][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 970.157614][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 970.157895][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 970.158197][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 970.158479][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 970.158802][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 970.159087][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 970.159424][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 970.159712][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 970.159994][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 970.160311][ T69] process_one_work (kernel/workqueue.c:2638) [ 970.160629][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 970.160896][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 970.161212][ T69] ? assign_work (kernel/workqueue.c:1101) [ 970.161507][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 970.161801][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 970.162176][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.162497][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.162804][ T69] kthread (kernel/kthread.c:388) [ 970.163060][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.163327][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 970.163572][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.163817][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 970.318509][ T69] ------------[ cut here ]------------ | [ 970.318856][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 970.319301][ T69] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 970.319849][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 970.321356][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 970.322097][ T69] Workqueue: netns cleanup_net [ 970.322365][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 970.322673][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 970.323686][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 970.324003][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 970.324423][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 970.324881][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 970.325344][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800867a628 [ 970.325855][ T69] R13: ffff88800867adf8 R14: ffffc900004ffc98 R15: ffff88800867abc0 [ 970.326362][ T69] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 970.326902][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 970.327305][ T69] CR2: 00007f27aa107000 CR3: 0000000019534006 CR4: 00000000001706f0 [ 970.327771][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 970.328252][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 970.328733][ T69] Call Trace: [ 970.328949][ T69] [ 970.329118][ T69] ? __warn (kernel/panic.c:677) [ 970.329378][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 970.329670][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 970.329992][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 970.330285][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 970.330562][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 970.330854][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 970.331174][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 970.331435][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 970.331769][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 970.332059][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 970.332373][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 970.332666][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 970.332928][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 970.333192][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 970.333449][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 970.333724][ T69] process_one_work (kernel/workqueue.c:2638) [ 970.333984][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 970.334228][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 970.334521][ T69] ? assign_work (kernel/workqueue.c:1101) [ 970.334767][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 970.335015][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 970.335425][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.335756][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 970.336051][ T69] kthread (kernel/kthread.c:388) [ 970.336341][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.336615][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 970.336890][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 970.337166][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1064.254736][ T69] ------------[ cut here ]------------ | [ 1064.255347][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 1064.256055][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1064.256975][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 1064.259381][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1064.260597][ T69] Workqueue: netns cleanup_net [ 1064.261077][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1064.261667][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 1064.263522][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 1064.264116][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 1064.264885][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1064.265667][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 1064.266442][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800745a628 [ 1064.267201][ T69] R13: ffff88800745adf8 R14: ffffc900004ffc98 R15: ffff88800745abc0 [ 1064.267980][ T69] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 1064.268847][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1064.269506][ T69] CR2: 00007fb7ceb7d000 CR3: 0000000019534003 CR4: 00000000001706f0 [ 1064.285741][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1064.287621][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1064.288367][ T69] Call Trace: [ 1064.290123][ T69] [ 1064.291070][ T69] ? __warn (kernel/panic.c:677) [ 1064.292010][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1064.293459][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1064.293971][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1064.295524][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1064.295902][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1064.296370][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1064.296886][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 1064.297275][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1064.297741][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 1064.298148][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1064.298621][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1064.299010][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1064.299431][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1064.299857][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1064.300275][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 1064.300724][ T69] process_one_work (kernel/workqueue.c:2638) [ 1064.301144][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1064.301611][ T69] ? assign_work (kernel/workqueue.c:1101) [ 1064.302147][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1064.302573][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1064.303297][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1064.303738][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1064.304251][ T69] kthread (kernel/kthread.c:388) [ 1064.304615][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1064.305089][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 1064.305477][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1064.306011][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1064.862717][ T69] ------------[ cut here ]------------ | [ 1064.863233][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 1064.863855][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1064.864658][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 1064.866836][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1064.867900][ T69] Workqueue: netns cleanup_net [ 1064.868458][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1064.870495][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 1064.872241][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 1064.872779][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 1064.873599][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1064.874267][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 1064.875035][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800ae32628 [ 1064.876027][ T69] R13: ffff88800ae32df8 R14: ffffc900004ffc98 R15: ffff88800ae32bc0 [ 1064.876832][ T69] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 1064.877746][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1064.878422][ T69] CR2: 00007fb7ceb7d000 CR3: 0000000019534003 CR4: 00000000001706f0 [ 1064.879223][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1064.880109][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1064.887881][ T69] Call Trace: [ 1064.888258][ T69] [ 1064.888571][ T69] ? __warn (kernel/panic.c:677) [ 1064.888951][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1064.889442][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1064.889963][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1064.890457][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1064.890876][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1064.891947][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1064.892392][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 1064.892794][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1064.893243][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 1064.893665][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1064.894121][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1064.894532][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1064.894967][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1064.895357][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 1064.895928][ T69] process_one_work (kernel/workqueue.c:2638) [ 1064.903634][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1064.904230][ T69] ? do_raw_spin_lock (./include/asm-generic/qspinlock.h:114 kernel/locking/spinlock_debug.c:116) [ 1064.904720][ T69] ? assign_work (kernel/workqueue.c:1101) [ 1064.905117][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1064.905553][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1064.906229][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1064.907633][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1064.908140][ T69] kthread (kernel/kthread.c:388) [ 1064.912041][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1064.912540][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 1064.912996][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1064.913471][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1110.017539][ T69] ------------[ cut here ]------------ | [ 1110.017870][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 1110.018274][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1110.018765][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 1110.020127][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1110.020841][ T69] Workqueue: netns cleanup_net [ 1110.021124][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1110.021469][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 1110.022583][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 1110.022904][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 1110.023314][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1110.023730][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 1110.024195][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888009042628 [ 1110.024656][ T69] R13: ffff888009042df8 R14: ffffc900004ffc98 R15: ffff888009042bc0 [ 1110.025090][ T69] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 1110.025616][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1110.025992][ T69] CR2: 00007f6c76626000 CR3: 0000000019534004 CR4: 00000000001706f0 [ 1110.026454][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1110.026915][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1110.027375][ T69] Call Trace: [ 1110.027578][ T69] [ 1110.027754][ T69] ? __warn (kernel/panic.c:677) [ 1110.027981][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1110.028268][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1110.028565][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1110.028812][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1110.029043][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1110.029293][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1110.029573][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 1110.029808][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1110.030088][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 1110.030339][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1110.030626][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1110.030865][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1110.031153][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1110.031459][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1110.031751][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 1110.032030][ T69] process_one_work (kernel/workqueue.c:2638) [ 1110.032334][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1110.032657][ T69] ? assign_work (kernel/workqueue.c:1101) [ 1110.032920][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1110.033207][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1110.033582][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1110.033888][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1110.034172][ T69] kthread (kernel/kthread.c:388) [ 1110.034417][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1110.034707][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 1110.034954][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1110.035207][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1110.195403][ T69] ------------[ cut here ]------------ | [ 1110.195726][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 1110.196101][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1110.196587][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 1110.197893][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1110.198568][ T69] Workqueue: netns cleanup_net [ 1110.198832][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1110.199138][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 1110.200163][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 1110.200488][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 1110.201010][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1110.201447][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 1110.201877][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800b24a628 [ 1110.202327][ T69] R13: ffff88800b24adf8 R14: ffffc900004ffc98 R15: ffff88800b24abc0 [ 1110.202743][ T69] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 1110.203240][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1110.203626][ T69] CR2: 00007f6c76626000 CR3: 0000000019534004 CR4: 00000000001706f0 [ 1110.204047][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1110.204493][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1110.204926][ T69] Call Trace: [ 1110.205109][ T69] [ 1110.205265][ T69] ? __warn (kernel/panic.c:677) [ 1110.205509][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1110.205782][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1110.206070][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1110.206313][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1110.206549][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1110.206815][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1110.207110][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 1110.207360][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1110.207648][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 1110.207898][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1110.208199][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1110.208463][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1110.208716][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1110.208980][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1110.209225][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 1110.209504][ T69] process_one_work (kernel/workqueue.c:2638) [ 1110.209771][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1110.210065][ T69] ? assign_work (kernel/workqueue.c:1101) [ 1110.210312][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1110.210564][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1110.210910][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1110.211180][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1110.211459][ T69] kthread (kernel/kthread.c:388) [ 1110.211673][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1110.211918][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 1110.212211][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1110.212463][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1189.226764][ T69] ------------[ cut here ]------------ | [ 1189.227080][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 1189.227551][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1189.228119][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 1189.229639][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1189.230389][ T69] Workqueue: netns cleanup_net [ 1189.230699][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1189.231073][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 1189.232136][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 1189.232460][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 1189.232873][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1189.233286][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 1189.233710][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888007c1a628 [ 1189.234198][ T69] R13: ffff888007c1adf8 R14: ffffc900004ffc98 R15: ffff888007c1abc0 [ 1189.234693][ T69] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 1189.235245][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1189.235613][ T69] CR2: 00007f854bb50000 CR3: 0000000019534002 CR4: 00000000001706f0 [ 1189.236102][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1189.236569][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1189.237018][ T69] Call Trace: [ 1189.237228][ T69] [ 1189.237426][ T69] ? __warn (kernel/panic.c:677) [ 1189.237660][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1189.237916][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1189.238233][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1189.238529][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1189.238782][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1189.239035][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1189.239334][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 1189.239620][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1189.239941][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 1189.240225][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1189.240573][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1189.240835][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1189.241179][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1189.241510][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1189.241786][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 1189.242126][ T69] process_one_work (kernel/workqueue.c:2638) [ 1189.242410][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1189.242763][ T69] ? assign_work (kernel/workqueue.c:1101) [ 1189.243048][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1189.243330][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1189.243760][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1189.244081][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1189.244370][ T69] kthread (kernel/kthread.c:388) [ 1189.244633][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1189.244877][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 1189.245116][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1189.245357][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1189.413656][ T69] ------------[ cut here ]------------ | [ 1189.413977][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 1189.414347][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1189.414839][ T69] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel sha1_generic xfrm_user xt_policy nft_compat nf_tables libcrc32c [ 1189.416222][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1189.416908][ T69] Workqueue: netns cleanup_net [ 1189.417187][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1189.417537][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc 9b e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 a7 dc 9b mov $0xffffffff9bdca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 e9 c7 da ff call 0xffffffffffdac829 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 e9 c7 da ff call 0xffffffffffdac7ff [ 1189.418633][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 1189.418986][ T69] RAX: 0000000000000000 RBX: ffffffff9c1be220 RCX: ffffffff9911056f [ 1189.419441][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1189.419901][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 1189.420357][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800b3ca628 [ 1189.420875][ T69] R13: ffff88800b3cadf8 R14: ffffc900004ffc98 R15: ffff88800b3cabc0 [ 1189.421316][ T69] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 1189.421782][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1189.422147][ T69] CR2: 00007fabff70f000 CR3: 0000000019534006 CR4: 00000000001706f0 [ 1189.422598][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1189.423043][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1189.423511][ T69] Call Trace: [ 1189.423692][ T69] [ 1189.423870][ T69] ? __warn (kernel/panic.c:677) [ 1189.424109][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1189.424378][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1189.424697][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1189.424968][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1189.425196][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1189.425446][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1189.425714][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 1189.425948][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1189.426223][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 1189.426482][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1189.426762][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1189.426999][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1189.427251][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1189.427524][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1189.427770][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 1189.428094][ T69] process_one_work (kernel/workqueue.c:2638) [ 1189.428384][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1189.428715][ T69] ? assign_work (kernel/workqueue.c:1101) [ 1189.428985][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1189.429263][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1189.429669][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1189.429949][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1189.430249][ T69] kthread (kernel/kthread.c:388) [ 1189.430472][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 1189.430729][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 1189.430992][ T69] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: dump_stack_lvl:print_report:kasan_report:kobject_put 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