====================================== | [ 972.118030][ T70] ================================================================== | [ 972.118543][ T70] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 972.118938][ T70] Read of size 1 at addr ffff888008ae1e7c by task kworker/u8:1/70 | [ 972.119377][ T70] [ 972.119953][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 972.120622][ T70] Workqueue: netns cleanup_net [ 972.120880][ T70] Call Trace: [ 972.121061][ T70] [ 972.121222][ T70] dump_stack_lvl (lib/dump_stack.c:107) [ 972.121466][ T70] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 972.121816][ T70] ? kobject_put (lib/kobject.c:729) [ 972.122048][ T70] print_report (mm/kasan/report.c:489) [ 972.122287][ T70] ? 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) [ 972.122551][ T70] kasan_report (mm/kasan/report.c:603) [ 972.122779][ T70] ? kobject_put (lib/kobject.c:729) [ 972.123061][ T70] kobject_put (lib/kobject.c:729) [ 972.123342][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 972.123601][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 972.123870][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 972.124196][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 972.124440][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 972.124745][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 972.125067][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 972.125366][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 972.125692][ T70] process_one_work (kernel/workqueue.c:2638) [ 972.125997][ T70] ? 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) [ 972.126284][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 972.126607][ T70] ? assign_work (kernel/workqueue.c:1101) [ 972.126883][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 972.127181][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 972.127579][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.127899][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.128203][ T70] kthread (kernel/kthread.c:388) [ 972.128460][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.128754][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 972.129007][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.129256][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 972.150273][ T70] ------------[ cut here ]------------ | [ 972.150594][ T70] refcount_t: underflow; use-after-free. | [ 972.150971][ T70] WARNING: CPU: 3 PID: 70 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 972.151512][ T70] 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 [ 972.152950][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 972.153604][ T70] Workqueue: netns cleanup_net [ 972.153870][ T70] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 972.154310][ T70] 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 02 9d 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 02 9d mov $0xffffffff9d027a20,%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 [ 972.155446][ T70] RSP: 0018:ffffc9000050fb98 EFLAGS: 00010282 [ 972.155836][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9a31056f [ 972.156288][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 972.156710][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a1f18 [ 972.157135][ T70] R10: ffffc9000050f8c7 R11: 205d303754202020 R12: ffff88800a9a2000 [ 972.157558][ T70] R13: ffff88800a9a2df8 R14: ffffc9000050fc98 R15: ffff88800a9a2bc0 [ 972.157975][ T70] FS: 0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000 [ 972.158455][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 972.158853][ T70] CR2: 00007f84ae8c2000 CR3: 0000000039934002 CR4: 00000000001706f0 [ 972.159341][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 972.159810][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 972.160290][ T70] Call Trace: [ 972.160505][ T70] [ 972.160695][ T70] ? __warn (kernel/panic.c:677) [ 972.160944][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 972.161312][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 972.161586][ T70] ? vprintk_emit (kernel/printk/printk.c:2313) [ 972.161859][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 972.162101][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 972.162364][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 972.162648][ T70] ? 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) [ 972.162903][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 972.163218][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 972.163517][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 972.163773][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 972.164057][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 972.164380][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 972.164677][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 972.165026][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 972.165298][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 972.165545][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 972.165817][ T70] process_one_work (kernel/workqueue.c:2638) [ 972.166089][ T70] ? 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) [ 972.166344][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 972.166626][ T70] ? assign_work (kernel/workqueue.c:1101) [ 972.166869][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 972.167118][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 972.167470][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.167743][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.168011][ T70] kthread (kernel/kthread.c:388) [ 972.168312][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.168564][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 972.168865][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.169151][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 972.172599][ T70] ------------[ cut here ]------------ | [ 972.172932][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 972.173345][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 972.173862][ T70] 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 [ 972.175533][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 972.176268][ T70] Workqueue: netns cleanup_net [ 972.176581][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 972.176979][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 972.178165][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 972.178492][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 972.178933][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 972.179352][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 972.179776][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a9a2628 [ 972.180214][ T70] R13: ffff88800a9a2df8 R14: ffffc9000050fc98 R15: ffff88800a9a2bc0 [ 972.180686][ T70] FS: 0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000 [ 972.181252][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 972.181658][ T70] CR2: 00007f84ae8c2000 CR3: 0000000039934002 CR4: 00000000001706f0 [ 972.182152][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 972.182751][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 972.183247][ T70] Call Trace: [ 972.183446][ T70] [ 972.183637][ T70] ? __warn (kernel/panic.c:677) [ 972.183906][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 972.184286][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 972.184620][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 972.184917][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 972.185188][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 972.185503][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 972.185825][ T70] ? 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) [ 972.186106][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 972.186423][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 972.186705][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 972.187009][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 972.187285][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 972.187612][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 972.187911][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 972.188218][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 972.188540][ T70] process_one_work (kernel/workqueue.c:2638) [ 972.188836][ T70] ? 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) [ 972.189080][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 972.189374][ T70] ? assign_work (kernel/workqueue.c:1101) [ 972.189618][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 972.189892][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 972.190308][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.190608][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.190971][ T70] kthread (kernel/kthread.c:388) [ 972.191199][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.191441][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 972.191678][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.191923][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 972.329907][ T70] ------------[ cut here ]------------ | [ 972.330292][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 972.330675][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 972.331169][ T70] 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 [ 972.332579][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 972.333276][ T70] Workqueue: netns cleanup_net [ 972.333569][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 972.333914][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 972.334980][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 972.335347][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 972.335760][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 972.336194][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 972.336610][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008b52628 [ 972.337028][ T70] R13: ffff888008b52df8 R14: ffffc9000050fc98 R15: ffff888008b52bc0 [ 972.337452][ T70] FS: 0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000 [ 972.337975][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 972.338401][ T70] CR2: 00007f4bc30c7270 CR3: 0000000039934005 CR4: 00000000001706f0 [ 972.338875][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 972.339342][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 972.339783][ T70] Call Trace: [ 972.340012][ T70] [ 972.340206][ T70] ? __warn (kernel/panic.c:677) [ 972.340459][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 972.340753][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 972.341059][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 972.341346][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 972.341613][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 972.341920][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 972.342239][ T70] ? 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) [ 972.342479][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 972.342752][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 972.342997][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 972.343288][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 972.343525][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 972.343790][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 972.344040][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 972.344322][ T70] process_one_work (kernel/workqueue.c:2638) [ 972.344584][ T70] ? 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) [ 972.344871][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 972.345208][ T70] ? assign_work (kernel/workqueue.c:1101) [ 972.345484][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 972.345763][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 972.346123][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.346401][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 972.346674][ T70] kthread (kernel/kthread.c:388) [ 972.346894][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.347137][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 972.347379][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 972.347622][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1062.554386][ T70] ------------[ cut here ]------------ | [ 1062.554768][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 1062.555184][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1062.555722][ T70] 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 [ 1062.557229][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1062.557937][ T70] Workqueue: netns cleanup_net [ 1062.558225][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1062.558538][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 1062.559557][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 1062.559877][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 1062.560383][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1062.560864][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 1062.561319][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a26a628 [ 1062.561737][ T70] R13: ffff88800a26adf8 R14: ffffc9000050fc98 R15: ffff88800a26abc0 [ 1062.562151][ T70] FS: 0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000 [ 1062.562675][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1062.563069][ T70] CR2: 00007fb349973000 CR3: 0000000039934002 CR4: 00000000001706f0 [ 1062.563537][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1062.563990][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1062.564462][ T70] Call Trace: [ 1062.564652][ T70] [ 1062.564816][ T70] ? __warn (kernel/panic.c:677) [ 1062.565060][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1062.565389][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1062.565652][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1062.565920][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1062.566201][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1062.566489][ T70] ? 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) [ 1062.566750][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1062.567052][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 1062.567328][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1062.567670][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1062.567933][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1062.568233][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1062.568527][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1062.568777][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 1062.569055][ T70] process_one_work (kernel/workqueue.c:2638) [ 1062.569340][ T70] ? 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) [ 1062.569606][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1062.569906][ T70] ? assign_work (kernel/workqueue.c:1101) [ 1062.570175][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1062.570444][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1062.570801][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1062.571115][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1062.571445][ T70] kthread (kernel/kthread.c:388) [ 1062.571720][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1062.572009][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 1062.572337][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1062.572616][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1062.772911][ T70] ------------[ cut here ]------------ | [ 1062.773245][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 1062.773687][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1062.774212][ T70] 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 [ 1062.775649][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1062.776306][ T70] Workqueue: netns cleanup_net [ 1062.776598][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1062.776953][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 1062.778069][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 1062.778444][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 1062.778888][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1062.779357][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 1062.779819][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800635a628 [ 1062.780283][ T70] R13: ffff88800635adf8 R14: ffffc9000050fc98 R15: ffff88800635abc0 [ 1062.780765][ T70] FS: 0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000 [ 1062.781239][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1062.781588][ T70] CR2: 00007ff7495b4270 CR3: 0000000039934003 CR4: 00000000001706f0 [ 1062.782006][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1062.782441][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1062.782894][ T70] Call Trace: [ 1062.783100][ T70] [ 1062.783277][ T70] ? __warn (kernel/panic.c:677) [ 1062.783501][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1062.783758][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1062.784037][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1062.784290][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1062.784526][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1062.784781][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1062.785053][ T70] ? 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) [ 1062.785299][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1062.785589][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 1062.785874][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1062.786203][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1062.786442][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1062.786693][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1062.786954][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1062.787210][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 1062.787487][ T70] process_one_work (kernel/workqueue.c:2638) [ 1062.787748][ T70] ? 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) [ 1062.787994][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1062.788303][ T70] ? assign_work (kernel/workqueue.c:1101) [ 1062.788551][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1062.788806][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1062.789151][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1062.789429][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1062.789700][ T70] kthread (kernel/kthread.c:388) [ 1062.789921][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1062.790175][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 1062.790411][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1062.790728][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1094.206908][ T70] ------------[ cut here ]------------ | [ 1094.207252][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 1094.207664][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1094.208176][ T70] 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 [ 1094.209674][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1094.210401][ T70] Workqueue: netns cleanup_net [ 1094.210663][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1094.211037][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 1094.212152][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 1094.212548][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 1094.213013][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1094.213473][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 1094.213913][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009e12628 [ 1094.214381][ T70] R13: ffff888009e12df8 R14: ffffc9000050fc98 R15: ffff888009e12bc0 [ 1094.214844][ T70] FS: 0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000 [ 1094.215362][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1094.215735][ T70] CR2: 00007f6ea9b02270 CR3: 0000000039934001 CR4: 00000000001706f0 [ 1094.216198][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1094.216657][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1094.217135][ T70] Call Trace: [ 1094.217362][ T70] [ 1094.217536][ T70] ? __warn (kernel/panic.c:677) [ 1094.217797][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1094.218066][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1094.218388][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1094.218672][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1094.218942][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1094.219247][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1094.219589][ T70] ? 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) [ 1094.219855][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1094.220168][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 1094.220460][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1094.220782][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1094.221055][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1094.221336][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1094.221630][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1094.221926][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 1094.222239][ T70] process_one_work (kernel/workqueue.c:2638) [ 1094.222538][ T70] ? 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) [ 1094.222832][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1094.223200][ T70] ? assign_work (kernel/workqueue.c:1101) [ 1094.223503][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1094.223788][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1094.224222][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1094.224497][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1094.224769][ T70] kthread (kernel/kthread.c:388) [ 1094.224988][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1094.225239][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 1094.225483][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1094.225728][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1094.393333][ T70] ------------[ cut here ]------------ | [ 1094.393699][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 1094.394097][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1094.394626][ T70] 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 [ 1094.396010][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1094.396737][ T70] Workqueue: netns cleanup_net [ 1094.397027][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1094.397343][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 1094.398516][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 1094.398898][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 1094.399410][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1094.399921][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 1094.400390][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a96a628 [ 1094.400854][ T70] R13: ffff88800a96adf8 R14: ffffc9000050fc98 R15: ffff88800a96abc0 [ 1094.401311][ T70] FS: 0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000 [ 1094.401829][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1094.402208][ T70] CR2: 00007f38e125a000 CR3: 0000000039934002 CR4: 00000000001706f0 [ 1094.402671][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1094.403087][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1094.403505][ T70] Call Trace: [ 1094.403693][ T70] [ 1094.403851][ T70] ? __warn (kernel/panic.c:677) [ 1094.404068][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1094.404334][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1094.404629][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1094.404955][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1094.405280][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1094.405593][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1094.405964][ T70] ? 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) [ 1094.406232][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1094.406572][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 1094.406902][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1094.407237][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1094.407575][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1094.407868][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1094.408195][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1094.408480][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 1094.408803][ T70] process_one_work (kernel/workqueue.c:2638) [ 1094.409127][ T70] ? 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) [ 1094.409402][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1094.409760][ T70] ? assign_work (kernel/workqueue.c:1101) [ 1094.410031][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1094.410305][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1094.410709][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1094.411003][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1094.411313][ T70] kthread (kernel/kthread.c:388) [ 1094.411536][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1094.411835][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 1094.412102][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1094.412381][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1113.750638][ T70] ------------[ cut here ]------------ | [ 1113.750950][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 1113.751336][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1113.751830][ T70] 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 [ 1113.753380][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1113.754069][ T70] Workqueue: netns cleanup_net [ 1113.754390][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1113.754778][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 1113.755885][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 1113.756278][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 1113.756749][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1113.757213][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 1113.757681][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a1f2628 [ 1113.758177][ T70] R13: ffff88800a1f2df8 R14: ffffc9000050fc98 R15: ffff88800a1f2bc0 [ 1113.758655][ T70] FS: 0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000 [ 1113.759149][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1113.759546][ T70] CR2: 00007f2156922000 CR3: 0000000039934003 CR4: 00000000001706f0 [ 1113.760011][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1113.760469][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1113.760907][ T70] Call Trace: [ 1113.761130][ T70] [ 1113.761325][ T70] ? __warn (kernel/panic.c:677) [ 1113.761623][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1113.761919][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1113.762235][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1113.762532][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1113.762809][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1113.763106][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1113.763415][ T70] ? 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) [ 1113.763709][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1113.764050][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 1113.764354][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1113.764672][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1113.764975][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1113.765306][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1113.765568][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1113.765833][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 1113.766117][ T70] process_one_work (kernel/workqueue.c:2638) [ 1113.766399][ T70] ? 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) [ 1113.766647][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1113.766937][ T70] ? assign_work (kernel/workqueue.c:1101) [ 1113.767191][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1113.767445][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1113.767850][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1113.768149][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1113.768485][ T70] kthread (kernel/kthread.c:388) [ 1113.768759][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1113.769038][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 1113.769314][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1113.769598][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1113.953255][ T70] ------------[ cut here ]------------ | [ 1113.953613][ T70] sysfs group 'bridge' not found for kobject 'br0' | [ 1113.954048][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1113.954650][ T70] 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 [ 1113.956006][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1113.956652][ T70] Workqueue: netns cleanup_net [ 1113.956909][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1113.957226][ T70] 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 fc 9c 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 fc 9c mov $0xffffffff9cfca7a0,%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 [ 1113.958264][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 1113.958671][ T70] RAX: 0000000000000000 RBX: ffffffff9d3be220 RCX: ffffffff9a31056f [ 1113.959151][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1113.959584][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 1113.960054][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a57a628 [ 1113.960530][ T70] R13: ffff88800a57adf8 R14: ffffc9000050fc98 R15: ffff88800a57abc0 [ 1113.961010][ T70] FS: 0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000 [ 1113.961552][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1113.961948][ T70] CR2: 00007f798d66330d CR3: 0000000039934002 CR4: 00000000001706f0 [ 1113.962453][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1113.962926][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1113.963408][ T70] Call Trace: [ 1113.963619][ T70] [ 1113.963813][ T70] ? __warn (kernel/panic.c:677) [ 1113.964084][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1113.964384][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1113.964697][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1113.965000][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1113.965254][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1113.965503][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1113.965777][ T70] ? 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) [ 1113.966011][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1113.966298][ T70] br_dev_delete (net/bridge/br_if.c:396) [ 1113.966549][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 1113.966826][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1113.967067][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1113.967348][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1113.967614][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1113.967866][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 1113.968139][ T70] process_one_work (kernel/workqueue.c:2638) [ 1113.968411][ T70] ? 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) [ 1113.968652][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1113.968953][ T70] ? assign_work (kernel/workqueue.c:1101) [ 1113.969266][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1113.969573][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1113.969954][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1113.970265][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1113.970570][ T70] kthread (kernel/kthread.c:388) [ 1113.970823][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 1113.971136][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 1113.971401][ T70] ? __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