====================================== | [ 718.885551][ T69] ================================================================== | [ 718.886026][ T69] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 718.886451][ T69] Read of size 1 at addr ffff888003580f7c by task kworker/u8:1/69 | [ 718.886884][ T69] [ 718.887518][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 718.888257][ T69] Workqueue: netns cleanup_net [ 718.888533][ T69] Call Trace: [ 718.888725][ T69] [ 718.888882][ T69] dump_stack_lvl (lib/dump_stack.c:107) [ 718.889141][ T69] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 718.889524][ T69] ? kobject_put (lib/kobject.c:729) [ 718.889760][ T69] print_report (mm/kasan/report.c:489) [ 718.890019][ T69] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) [ 718.890284][ T69] kasan_report (mm/kasan/report.c:603) [ 718.890552][ T69] ? kobject_put (lib/kobject.c:729) [ 718.890817][ T69] kobject_put (lib/kobject.c:729) [ 718.891049][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 718.891411][ T69] br_dev_delete (net/bridge/br_if.c:396) bridge [ 718.891736][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 718.892123][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 718.892374][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 718.892735][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 718.893050][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 718.893303][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 718.893622][ T69] process_one_work (kernel/workqueue.c:2638) [ 718.893923][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 718.894171][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 718.894485][ T69] ? assign_work (kernel/workqueue.c:1101) [ 718.894732][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 718.894979][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 718.895385][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 718.895714][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 718.895996][ T69] kthread (kernel/kthread.c:388) [ 718.896251][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 718.896533][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 718.896809][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 718.897096][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 718.917864][ T69] ------------[ cut here ]------------ | [ 718.918181][ T69] refcount_t: underflow; use-after-free. | [ 718.918555][ T69] WARNING: CPU: 1 PID: 69 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 718.919069][ T69] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel sch_ingress em_meta cls_basic sch_ets sch_tbf bridge stp llc 8021q vrf veth [ 718.920568][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 718.921363][ T69] Workqueue: netns cleanup_net [ 718.921632][ T69] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 718.921959][ T69] Code: 64 5d 03 80 fb 01 0f 87 54 5a 91 01 83 e3 01 0f 85 4d ff ff ff c6 05 d6 64 5d 03 01 90 48 c7 c7 00 58 82 8d e8 5e 4c 2b ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 7c 23 a7 ff e9 b6 fe ff ff All code ======== 0: 64 5d fs pop %rbp 2: 03 80 fb 01 0f 87 add -0x78f0fe05(%rax),%eax 8: 54 push %rsp 9: 5a pop %rdx a: 91 xchg %eax,%ecx b: 01 83 e3 01 0f 85 add %eax,-0x7af0fe1d(%rbx) 11: 4d ff rex.WRB (bad) 13: ff (bad) 14: ff c6 inc %esi 16: 05 d6 64 5d 03 add $0x35d64d6,%eax 1b: 01 90 48 c7 c7 00 add %edx,0xc7c748(%rax) 21: 58 pop %rax 22: 82 (bad) 23: 8d (bad) 24: e8 5e 4c 2b ff call 0xffffffffff2b4c87 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 7c 23 a7 ff call 0xffffffffffa723b7 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 7c 23 a7 ff call 0xffffffffffa7238d 11: e9 b6 fe ff ff jmp 0xfffffffffffffecc [ 718.923169][ T69] RSP: 0018:ffffc900004ffb98 EFLAGS: 00010282 [ 718.923515][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8ad0e74f [ 718.924019][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 718.924518][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff5200009ff18 [ 718.924962][ T69] R10: ffffc900004ff8c7 R11: 205d393654202020 R12: ffff888006efa000 [ 718.925421][ T69] R13: ffff888006efadd8 R14: ffffc900004ffc98 R15: ffff888006efaba0 [ 718.925836][ T69] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 718.926305][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.926697][ T69] CR2: 000055e992403dec CR3: 000000000a702004 CR4: 00000000001706f0 [ 718.927153][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.927599][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.928061][ T69] Call Trace: [ 718.928270][ T69] [ 718.928438][ T69] ? __warn (kernel/panic.c:677) [ 718.928703][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 718.929031][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 718.929297][ T69] ? vprintk_emit (kernel/printk/printk.c:2313) [ 718.929549][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 718.929815][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 718.930070][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 718.930351][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 718.930632][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 718.930979][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 718.931309][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 718.931650][ T69] br_dev_delete (net/bridge/br_if.c:396) bridge [ 718.932014][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 718.932467][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 718.932719][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 718.933054][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 718.933352][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 718.933642][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 718.933919][ T69] process_one_work (kernel/workqueue.c:2638) [ 718.934187][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 718.934436][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 718.934771][ T69] ? assign_work (kernel/workqueue.c:1101) [ 718.935057][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 718.935339][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 718.935713][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 718.936009][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 718.936329][ T69] kthread (kernel/kthread.c:388) [ 718.936601][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 718.936847][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 718.937122][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 718.937369][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 718.940489][ T69] ------------[ cut here ]------------ | [ 718.940793][ T69] sysfs group 'bridge' not found for kobject 'br2' | [ 718.941319][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 718.941895][ T69] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel sch_ingress em_meta cls_basic sch_ets sch_tbf bridge stp llc 8021q vrf veth [ 718.943481][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 718.944272][ T69] Workqueue: netns cleanup_net [ 718.944571][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 718.944969][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 99 7c 8d e8 10 18 5f ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 69 ee 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 99 7c 8d mov $0xffffffff8d7c99a0,%rdi 24: e8 10 18 5f ff call 0xffffffffff5f1839 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 69 ee da ff call 0xffffffffffdaeea9 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 69 ee da ff call 0xffffffffffdaee7f [ 718.946027][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 718.946401][ T69] RAX: 0000000000000000 RBX: ffffffffc03f0f00 RCX: ffffffff8ad0e74f [ 718.946819][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 718.947241][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 718.947694][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888006efa610 [ 718.948217][ T69] R13: ffff888006efadd8 R14: ffffc900004ffc98 R15: ffff888006efaba0 [ 718.948690][ T69] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 718.949253][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.949666][ T69] CR2: 000055e992403dec CR3: 000000000a702004 CR4: 00000000001706f0 [ 718.950181][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.950627][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.951130][ T69] Call Trace: [ 718.951307][ T69] [ 718.951483][ T69] ? __warn (kernel/panic.c:677) [ 718.951742][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 718.951999][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 718.952388][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 718.952680][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 718.952944][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 718.953227][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 718.953536][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 718.953797][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 718.954085][ T69] br_dev_delete (net/bridge/br_if.c:396) bridge [ 718.954476][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 718.954866][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 718.955223][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 718.955575][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 718.955878][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 718.956178][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 718.956518][ T69] process_one_work (kernel/workqueue.c:2638) [ 718.956802][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 718.957073][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 718.957400][ T69] ? assign_work (kernel/workqueue.c:1101) [ 718.957694][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 718.957985][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 718.958377][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 718.958701][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 718.959027][ T69] kthread (kernel/kthread.c:388) [ 718.959293][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 718.959613][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 718.959910][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 718.960169][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 719.124468][ T69] ------------[ cut here ]------------ | [ 719.124816][ T69] sysfs group 'bridge' not found for kobject 'br2' | [ 719.125312][ T69] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 719.125851][ T69] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel sch_ingress em_meta cls_basic sch_ets sch_tbf bridge stp llc 8021q vrf veth [ 719.127337][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 719.128058][ T69] Workqueue: netns cleanup_net [ 719.128404][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 719.128794][ T69] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 99 7c 8d e8 10 18 5f ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 69 ee 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 99 7c 8d mov $0xffffffff8d7c99a0,%rdi 24: e8 10 18 5f ff call 0xffffffffff5f1839 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 69 ee da ff call 0xffffffffffdaeea9 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 69 ee da ff call 0xffffffffffdaee7f [ 719.129888][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 719.130301][ T69] RAX: 0000000000000000 RBX: ffffffffc03f0f00 RCX: ffffffff8ad0e74f [ 719.130788][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 719.131305][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 719.131801][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888009722610 [ 719.132301][ T69] R13: ffff888009722dd8 R14: ffffc900004ffc98 R15: ffff888009722ba0 [ 719.132826][ T69] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 719.133342][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 719.133772][ T69] CR2: 00007fa799ecb270 CR3: 0000000008174006 CR4: 00000000001706f0 [ 719.134282][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 719.134705][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 719.135131][ T69] Call Trace: [ 719.135310][ T69] [ 719.135471][ T69] ? __warn (kernel/panic.c:677) [ 719.135696][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 719.135953][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 719.136238][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 719.136656][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 719.136951][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 719.137273][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 719.137650][ T69] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 719.137946][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 719.138306][ T69] br_dev_delete (net/bridge/br_if.c:396) bridge [ 719.138696][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 719.139097][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 719.139395][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 719.139716][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 719.140043][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 719.140365][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 719.140735][ T69] process_one_work (kernel/workqueue.c:2638) [ 719.141094][ T69] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 719.141413][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 719.141789][ T69] ? assign_work (kernel/workqueue.c:1101) [ 719.142097][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 719.142359][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 719.142759][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 719.143089][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 719.143432][ T69] kthread (kernel/kthread.c:388) [ 719.143713][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 719.144036][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 719.144387][ T69] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: dump_stack_lvl:print_report:kasan_report:kobject_put refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net