====================================== | [ 40.022460][ T11] ================================================================== | [ 40.022903][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 40.023305][ T11] Read of size 1 at addr ffff88800200a6bc by task kworker/u8:0/11 | [ 40.023718][ T11] [ 40.024263][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 40.024902][ T11] Workqueue: netns cleanup_net [ 40.025157][ T11] Call Trace: [ 40.025339][ T11] [ 40.025500][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 40.025743][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 40.026095][ T11] ? kobject_put (lib/kobject.c:729) [ 40.026331][ T11] print_report (mm/kasan/report.c:489) [ 40.026572][ 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) [ 40.026839][ T11] kasan_report (mm/kasan/report.c:603) [ 40.027070][ T11] ? kobject_put (lib/kobject.c:729) [ 40.027308][ T11] kobject_put (lib/kobject.c:729) [ 40.027537][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 40.027775][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 40.028021][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 40.028308][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 40.028545][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 40.028847][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 40.029110][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 40.029360][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 40.029636][ T11] process_one_work (kernel/workqueue.c:2638) [ 40.029898][ 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) [ 40.030143][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 40.030431][ T11] ? assign_work (kernel/workqueue.c:1101) [ 40.030684][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 40.030936][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 40.031207][ T11] kthread (kernel/kthread.c:388) [ 40.031428][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 40.031675][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 40.031916][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 40.032172][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 40.051077][ T11] ------------[ cut here ]------------ | [ 40.051371][ T11] refcount_t: underflow; use-after-free. | [ 40.051719][ T11] WARNING: CPU: 0 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 40.052300][ T11] Modules linked in: [ 40.053083][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 40.053789][ T11] Workqueue: netns cleanup_net [ 40.054055][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 40.054421][ 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 62 9e 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 62 9e mov $0xffffffff9e627a20,%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 [ 40.055481][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 40.055866][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9b91056f [ 40.056313][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 40.056771][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 40.057237][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff8880087d2000 [ 40.057692][ T11] R13: ffff8880087d2df8 R14: ffffc900000bfc98 R15: ffff8880087d2bc0 [ 40.058139][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 40.058642][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.059041][ T11] CR2: 0000000001ca7528 CR3: 0000000016534002 CR4: 00000000001706f0 [ 40.059499][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.059947][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.060394][ T11] Call Trace: [ 40.060591][ T11] [ 40.060770][ T11] ? __warn (kernel/panic.c:677) [ 40.060995][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 40.061289][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 40.061532][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 40.061781][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 40.062026][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 40.062277][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 40.062548][ 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) [ 40.062824][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 40.063150][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 40.063481][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 40.063740][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 40.064018][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 40.064335][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 40.064597][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 40.064956][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 40.065240][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 40.065510][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 40.065817][ T11] process_one_work (kernel/workqueue.c:2638) [ 40.066112][ 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) [ 40.066386][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 40.066711][ T11] ? assign_work (kernel/workqueue.c:1101) [ 40.066994][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 40.067267][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 40.067568][ T11] kthread (kernel/kthread.c:388) [ 40.067800][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 40.068082][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 40.068357][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 40.068620][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 40.071796][ T11] ------------[ cut here ]------------ | [ 40.072138][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 40.072536][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 40.073133][ T11] Modules linked in: [ 40.073883][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 40.074559][ T11] Workqueue: netns cleanup_net [ 40.074863][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 40.075211][ 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 5c 9e 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 5c 9e mov $0xffffffff9e5ca7a0,%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 [ 40.076244][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 40.076604][ T11] RAX: 0000000000000000 RBX: ffffffff9e9be220 RCX: ffffffff9b91056f [ 40.077069][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 40.077521][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 40.077967][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880087d2628 [ 40.078420][ T11] R13: ffff8880087d2df8 R14: ffffc900000bfc98 R15: ffff8880087d2bc0 [ 40.078886][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 40.079393][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.079744][ T11] CR2: 0000000001ca7528 CR3: 0000000016534002 CR4: 00000000001706f0 [ 40.080168][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.080588][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.081012][ T11] Call Trace: [ 40.081195][ T11] [ 40.081354][ T11] ? __warn (kernel/panic.c:677) [ 40.081572][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 40.081824][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 40.082141][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 40.082420][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 40.082689][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 40.082974][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 40.083267][ 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) [ 40.083517][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 40.083814][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 40.084093][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 40.084393][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 40.084665][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 40.084989][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 40.085299][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 40.085596][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 40.085913][ T11] process_one_work (kernel/workqueue.c:2638) [ 40.086203][ 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) [ 40.086486][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 40.086806][ T11] ? assign_work (kernel/workqueue.c:1101) [ 40.087091][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 40.087365][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 40.087675][ T11] kthread (kernel/kthread.c:388) [ 40.087932][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 40.088213][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 40.088479][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 40.088731][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 61.355644][ T11] ------------[ cut here ]------------ | [ 61.356034][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 61.356415][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 61.356952][ T11] Modules linked in: [ 61.357667][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 61.358448][ T11] Workqueue: netns cleanup_net [ 61.358744][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 61.359092][ 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 5c 9e 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 5c 9e mov $0xffffffff9e5ca7a0,%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 [ 61.360168][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 61.360540][ T11] RAX: 0000000000000000 RBX: ffffffff9e9be220 RCX: ffffffff9b91056f [ 61.361002][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 61.361443][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 61.361892][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888017e0a628 [ 61.362326][ T11] R13: ffff888017e0adf8 R14: ffffc900000bfc98 R15: ffff888017e0abc0 [ 61.362743][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 61.363216][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.363574][ T11] CR2: 00007fd6401b8000 CR3: 0000000016534006 CR4: 00000000001706f0 [ 61.364088][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.364538][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.364987][ T11] Call Trace: [ 61.365180][ T11] [ 61.365367][ T11] ? __warn (kernel/panic.c:677) [ 61.365627][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 61.365913][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 61.366220][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 61.366504][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 61.366767][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 61.367052][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 61.367361][ 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) [ 61.367634][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 61.367957][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 61.368238][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 61.368563][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 61.368829][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 61.369088][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 61.369352][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 61.369606][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 61.369881][ T11] process_one_work (kernel/workqueue.c:2638) [ 61.370152][ 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) [ 61.370397][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 61.370685][ T11] ? assign_work (kernel/workqueue.c:1101) [ 61.370970][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 61.371266][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 61.371565][ T11] kthread (kernel/kthread.c:388) [ 61.371819][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 61.372074][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 61.372313][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 61.372561][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 82.292959][ T11] ------------[ cut here ]------------ | [ 82.293311][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 82.293742][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 82.294286][ T11] Modules linked in: [ 82.295108][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 82.295853][ T11] Workqueue: netns cleanup_net [ 82.296119][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 82.296433][ 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 5c 9e 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 5c 9e mov $0xffffffff9e5ca7a0,%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 [ 82.297544][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 82.297886][ T11] RAX: 0000000000000000 RBX: ffffffff9e9be220 RCX: ffffffff9b91056f [ 82.298370][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 82.298827][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 82.299308][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880069b2628 [ 82.299777][ T11] R13: ffff8880069b2df8 R14: ffffc900000bfc98 R15: ffff8880069b2bc0 [ 82.300245][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 82.300771][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.301137][ T11] CR2: 00007f126f989000 CR3: 0000000016534005 CR4: 00000000001706f0 [ 82.301554][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.301984][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.302399][ T11] Call Trace: [ 82.302573][ T11] [ 82.302738][ T11] ? __warn (kernel/panic.c:677) [ 82.302988][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 82.303271][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 82.303576][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 82.303840][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 82.304110][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 82.304392][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 82.304693][ 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) [ 82.304959][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 82.305257][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 82.305552][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 82.305850][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 82.306124][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 82.306402][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 82.306684][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 82.306952][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 82.307266][ T11] process_one_work (kernel/workqueue.c:2638) [ 82.307540][ 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) [ 82.307803][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 82.308135][ T11] ? assign_work (kernel/workqueue.c:1101) [ 82.308400][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 82.308677][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 82.308970][ T11] kthread (kernel/kthread.c:388) [ 82.309188][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 82.309430][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 82.309670][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 82.309913][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 104.035301][ T11] ------------[ cut here ]------------ | [ 104.035634][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 104.036049][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 104.036563][ T11] Modules linked in: [ 104.037505][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 104.038212][ T11] Workqueue: netns cleanup_net [ 104.038469][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 104.038779][ 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 5c 9e 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 5c 9e mov $0xffffffff9e5ca7a0,%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 [ 104.039871][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 104.040218][ T11] RAX: 0000000000000000 RBX: ffffffff9e9be220 RCX: ffffffff9b91056f [ 104.040675][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 104.041148][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 104.041602][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888006b12628 [ 104.042071][ T11] R13: ffff888006b12df8 R14: ffffc900000bfc98 R15: ffff888006b12bc0 [ 104.042529][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 104.043054][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.043429][ T11] CR2: 00007f6d8270d270 CR3: 0000000006470003 CR4: 00000000001706f0 [ 104.043875][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 104.044329][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 104.044767][ T11] Call Trace: [ 104.044963][ T11] [ 104.045131][ T11] ? __warn (kernel/panic.c:677) [ 104.045373][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 104.045643][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 104.045963][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 104.046207][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 104.046442][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 104.046688][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 104.046965][ 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) [ 104.047206][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 104.047482][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 104.047736][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 104.048028][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 104.048297][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 104.048570][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 104.048862][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 104.049161][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 104.049454][ T11] process_one_work (kernel/workqueue.c:2638) [ 104.049749][ 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) [ 104.050014][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 104.050296][ T11] ? assign_work (kernel/workqueue.c:1101) [ 104.050539][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 104.050796][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 104.051076][ T11] kthread (kernel/kthread.c:388) [ 104.051296][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 104.051540][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 104.051785][ 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