====================================== | [ 41.898293][ T11] ================================================================== | [ 41.898820][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 41.899255][ T11] Read of size 1 at addr ffff8880059ee6bc by task kworker/u8:0/11 | [ 41.899726][ T11] [ 41.900338][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 41.901016][ T11] Workqueue: netns cleanup_net [ 41.901273][ T11] Call Trace: [ 41.901452][ T11] [ 41.901608][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 41.901850][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 41.902197][ T11] ? kobject_put (lib/kobject.c:729) [ 41.902430][ T11] print_report (mm/kasan/report.c:489) [ 41.902686][ T11] ? 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) [ 41.902956][ T11] kasan_report (mm/kasan/report.c:603) [ 41.903189][ T11] ? kobject_put (lib/kobject.c:729) [ 41.903426][ T11] kobject_put (lib/kobject.c:729) [ 41.903650][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 41.903894][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 41.904146][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 41.904428][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 41.904759][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 41.905090][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 41.905354][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 41.905656][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 41.905933][ T11] process_one_work (kernel/workqueue.c:2638) [ 41.906196][ T11] ? 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) [ 41.906441][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 41.906730][ T11] ? assign_work (kernel/workqueue.c:1101) [ 41.906978][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 41.907231][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 41.907501][ T11] kthread (kernel/kthread.c:388) [ 41.907723][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 41.907970][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 41.908210][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 41.908451][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 41.928606][ T11] ------------[ cut here ]------------ | [ 41.928939][ T11] refcount_t: underflow; use-after-free. | [ 41.929301][ T11] WARNING: CPU: 1 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 41.929844][ T11] Modules linked in: [ 41.930627][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 41.931345][ T11] Workqueue: netns cleanup_net [ 41.931633][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 41.932038][ T11] 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 c2 85 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 c2 85 mov $0xffffffff85c27a20,%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 [ 41.933241][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 41.933582][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82f1056f [ 41.934132][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 41.934613][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 41.935137][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff888008132000 [ 41.935601][ T11] R13: ffff888008132df8 R14: ffffc900000bfc98 R15: ffff888008132bc0 [ 41.936130][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 41.936676][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.937103][ T11] CR2: 00007ffebdb3d578 CR3: 000000000717c004 CR4: 00000000001706f0 [ 41.937528][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.937948][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.938371][ T11] Call Trace: [ 41.938551][ T11] [ 41.938709][ T11] ? __warn (kernel/panic.c:677) [ 41.938950][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 41.939295][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 41.939570][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 41.939853][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 41.940121][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 41.940426][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 41.940728][ T11] ? 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) [ 41.940967][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 41.941266][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 41.941605][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 41.941847][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 41.942131][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 41.942462][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 41.942710][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 41.943040][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 41.943339][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 41.943621][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 41.943927][ T11] process_one_work (kernel/workqueue.c:2638) [ 41.944238][ T11] ? 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) [ 41.944502][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 41.944839][ T11] ? assign_work (kernel/workqueue.c:1101) [ 41.945200][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 41.945484][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 41.945798][ T11] kthread (kernel/kthread.c:388) [ 41.946090][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 41.946337][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 41.946628][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 41.946925][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 41.950124][ T11] ------------[ cut here ]------------ | [ 41.950415][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 41.950785][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 41.951278][ T11] Modules linked in: [ 41.951983][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 41.952657][ T11] Workqueue: netns cleanup_net [ 41.952921][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 41.953436][ T11] 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 bc 85 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 bc 85 mov $0xffffffff85bca7a0,%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 [ 41.954646][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 41.955025][ T11] RAX: 0000000000000000 RBX: ffffffff85fbe220 RCX: ffffffff82f1056f [ 41.955539][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 41.956081][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 41.956552][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888008132628 [ 41.957077][ T11] R13: ffff888008132df8 R14: ffffc900000bfc98 R15: ffff888008132bc0 [ 41.957525][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 41.957988][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.958343][ T11] CR2: 00007ffebdb3d578 CR3: 000000002d734003 CR4: 00000000001706f0 [ 41.958764][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.959192][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.959616][ T11] Call Trace: [ 41.959798][ T11] [ 41.959958][ T11] ? __warn (kernel/panic.c:677) [ 41.960213][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 41.960571][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 41.960871][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 41.961162][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 41.961458][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 41.961723][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 41.961990][ T11] ? 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) [ 41.962273][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 41.962608][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 41.962909][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 41.963264][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 41.963553][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 41.963898][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 41.964182][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 41.964474][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 41.964842][ T11] process_one_work (kernel/workqueue.c:2638) [ 41.965157][ T11] ? 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) [ 41.965429][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 41.965753][ T11] ? assign_work (kernel/workqueue.c:1101) [ 41.966073][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 41.966357][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 41.966648][ T11] kthread (kernel/kthread.c:388) [ 41.966900][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 41.967221][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 41.967519][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 41.967799][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 64.144184][ T11] ------------[ cut here ]------------ | [ 64.144493][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 64.144908][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 64.145482][ T11] Modules linked in: [ 64.146433][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 64.147169][ T11] Workqueue: netns cleanup_net [ 64.147440][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 64.147806][ T11] 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 bc 85 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 bc 85 mov $0xffffffff85bca7a0,%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 [ 64.148928][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 64.149288][ T11] RAX: 0000000000000000 RBX: ffffffff85fbe220 RCX: ffffffff82f1056f [ 64.149740][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 64.150209][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 64.150687][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888006b12628 [ 64.151136][ T11] R13: ffff888006b12df8 R14: ffffc900000bfc98 R15: ffff888006b12bc0 [ 64.151602][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 64.152084][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.152448][ T11] CR2: 00007ff20fc64c08 CR3: 000000002d734001 CR4: 00000000001706f0 [ 64.152871][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.153296][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.153770][ T11] Call Trace: [ 64.153962][ T11] [ 64.154150][ T11] ? __warn (kernel/panic.c:677) [ 64.154380][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 64.154661][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 64.154974][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 64.155245][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 64.155501][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 64.155781][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 64.156099][ T11] ? 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) [ 64.156366][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 64.156699][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 64.156973][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 64.157286][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 64.157541][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 64.157821][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 64.158104][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 64.158359][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 64.158636][ T11] process_one_work (kernel/workqueue.c:2638) [ 64.158901][ T11] ? 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) [ 64.159153][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 64.159443][ T11] ? assign_work (kernel/workqueue.c:1101) [ 64.159694][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 64.159946][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 64.160223][ T11] kthread (kernel/kthread.c:388) [ 64.160448][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 64.160737][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 64.160996][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 64.161349][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 86.239233][ T11] ------------[ cut here ]------------ | [ 86.239681][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 86.240109][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 86.240765][ T11] Modules linked in: [ 86.241642][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 86.242524][ T11] Workqueue: netns cleanup_net [ 86.242964][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 86.243502][ T11] 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 bc 85 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 bc 85 mov $0xffffffff85bca7a0,%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 [ 86.244858][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 86.245206][ T11] RAX: 0000000000000000 RBX: ffffffff85fbe220 RCX: ffffffff82f1056f [ 86.245659][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 86.246083][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 86.246511][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88802f06a628 [ 86.247025][ T11] R13: ffff88802f06adf8 R14: ffffc900000bfc98 R15: ffff88802f06abc0 [ 86.247562][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 86.248133][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.248598][ T11] CR2: 00007ffebdb3ce88 CR3: 000000000717c006 CR4: 00000000001706f0 [ 86.249113][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.249595][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.250102][ T11] Call Trace: [ 86.250347][ T11] [ 86.250539][ T11] ? __warn (kernel/panic.c:677) [ 86.250794][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 86.251118][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 86.251458][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 86.251765][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 86.252037][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 86.252388][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 86.252721][ T11] ? 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) [ 86.253025][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 86.253385][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 86.253672][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 86.253998][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 86.254276][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 86.254573][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 86.254872][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 86.255131][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 86.255503][ T11] process_one_work (kernel/workqueue.c:2638) [ 86.255795][ T11] ? 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) [ 86.256036][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 86.256420][ T11] ? assign_work (kernel/workqueue.c:1101) [ 86.256673][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 86.256926][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 86.257203][ T11] kthread (kernel/kthread.c:388) [ 86.257492][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 86.257793][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 86.258065][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 86.258421][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 108.696487][ T11] ------------[ cut here ]------------ | [ 108.696816][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 108.697284][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 108.697813][ T11] Modules linked in: [ 108.698797][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 108.699534][ T11] Workqueue: netns cleanup_net [ 108.699845][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 108.700221][ T11] 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 bc 85 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 bc 85 mov $0xffffffff85bca7a0,%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 [ 108.701342][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 108.701707][ T11] RAX: 0000000000000000 RBX: ffffffff85fbe220 RCX: ffffffff82f1056f [ 108.702176][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 108.702632][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 108.703132][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88802ef92628 [ 108.703609][ T11] R13: ffff88802ef92df8 R14: ffffc900000bfc98 R15: ffff88802ef92bc0 [ 108.704077][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 108.704590][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 108.705008][ T11] CR2: 00007f8c979edc08 CR3: 000000002d734002 CR4: 00000000001706f0 [ 108.705506][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 108.705972][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 108.706462][ T11] Call Trace: [ 108.706658][ T11] [ 108.706841][ T11] ? __warn (kernel/panic.c:677) [ 108.707144][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 108.707405][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 108.707678][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 108.707922][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 108.708178][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 108.708441][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 108.708720][ T11] ? 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) [ 108.709002][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 108.709343][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 108.709656][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 108.709985][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 108.710271][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 108.710558][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 108.710881][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 108.711196][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 108.711516][ T11] process_one_work (kernel/workqueue.c:2638) [ 108.711804][ T11] ? 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) [ 108.712103][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 108.712449][ T11] ? assign_work (kernel/workqueue.c:1101) [ 108.712732][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 108.713005][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 108.713327][ T11] kthread (kernel/kthread.c:388) [ 108.713610][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 108.713892][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 108.714179][ T11] ? __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