====================================== | [ 180.911029][ T71] ================================================================== | [ 180.911528][ T71] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 180.911922][ T71] Read of size 1 at addr ffff8880054ee7fc by task kworker/u8:1/71 | [ 180.912373][ T71] [ 180.912983][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 180.913715][ T71] Workqueue: netns cleanup_net [ 180.913994][ T71] Call Trace: [ 180.914184][ T71] [ 180.914364][ T71] dump_stack_lvl (lib/dump_stack.c:107) [ 180.914606][ T71] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 180.914951][ T71] ? kobject_put (lib/kobject.c:729) [ 180.915187][ T71] print_report (mm/kasan/report.c:489) [ 180.915438][ T71] ? 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) [ 180.915749][ T71] kasan_report (mm/kasan/report.c:603) [ 180.916030][ T71] ? kobject_put (lib/kobject.c:729) [ 180.916291][ T71] kobject_put (lib/kobject.c:729) [ 180.916536][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 180.916934][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 180.917269][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 180.917663][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 180.917930][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 180.918241][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 180.918509][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 180.918785][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 180.919092][ T71] process_one_work (kernel/workqueue.c:2638) [ 180.919362][ T71] ? 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) [ 180.919628][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 180.919940][ T71] ? assign_work (kernel/workqueue.c:1101) [ 180.920186][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 180.920434][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 180.920836][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 180.921139][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 180.921431][ T71] kthread (kernel/kthread.c:388) [ 180.921673][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 180.921962][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 180.922220][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 180.922489][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 180.943012][ T71] ------------[ cut here ]------------ | [ 180.943326][ T71] refcount_t: underflow; use-after-free. | [ 180.943720][ T71] WARNING: CPU: 2 PID: 71 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 180.944281][ T71] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_mirred cls_flower 8021q bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth [ 180.945885][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 180.946648][ T71] Workqueue: netns cleanup_net [ 180.946904][ T71] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 180.947247][ T71] 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 a2 9d 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: a2 9d e8 5e 4c 2b ff movabs %al,0xf90ff2b4c5ee89d 29:* 90 0f <-- trapping instruction 2b: 0b 90 90 e9 2f ff or -0xd01670(%rax),%edx 31: ff (bad) 32: ff 48 89 decl -0x77(%rax) 35: df e8 fucomip %st(0),%st 37: 7c 23 jl 0x5c 39: a7 cmpsl %es:(%rdi),%ds:(%rsi) 3a: ff (bad) 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 [ 180.948271][ T71] RSP: 0018:ffffc9000051fb98 EFLAGS: 00010282 [ 180.948588][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9af0e74f [ 180.949013][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 180.949458][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a3f18 [ 180.950024][ T71] R10: ffffc9000051f8c7 R11: 205d313754202020 R12: ffff888006922000 [ 180.950534][ T71] R13: ffff888006922dd8 R14: ffffc9000051fc98 R15: ffff888006922ba0 [ 180.951033][ T71] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 180.951591][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 180.952070][ T71] CR2: 00007f58eb0d5270 CR3: 0000000006acc006 CR4: 00000000001706f0 [ 180.952607][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 180.953047][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 180.953552][ T71] Call Trace: [ 180.953787][ T71] [ 180.953968][ T71] ? __warn (kernel/panic.c:677) [ 180.954228][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 180.954612][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 180.954921][ T71] ? vprintk_emit (kernel/printk/printk.c:2313) [ 180.955230][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 180.955500][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 180.955775][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 180.956125][ T71] ? 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) [ 180.956400][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 180.956731][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 180.957062][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 180.957484][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 180.957852][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 180.958268][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 180.958541][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 180.958883][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 180.959154][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 180.959413][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 180.959686][ T71] process_one_work (kernel/workqueue.c:2638) [ 180.959983][ T71] ? 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) [ 180.960272][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 180.960604][ T71] ? assign_work (kernel/workqueue.c:1101) [ 180.960891][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 180.961224][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 180.961638][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 180.961961][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 180.962408][ T71] kthread (kernel/kthread.c:388) [ 180.962684][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 180.962967][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 180.963247][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 180.963526][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 180.967119][ T71] ------------[ cut here ]------------ | [ 180.967475][ T71] sysfs group 'bridge' not found for kobject 'br2' | [ 180.967925][ T71] WARNING: CPU: 2 PID: 71 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 180.968552][ T71] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_mirred cls_flower 8021q bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth [ 180.970407][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 180.971150][ T71] Workqueue: netns cleanup_net [ 180.971442][ T71] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 180.971787][ T71] 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 9c 9d 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 9c 9d mov $0xffffffff9d9c99a0,%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 [ 180.972819][ T71] RSP: 0018:ffffc9000051fba0 EFLAGS: 00010282 [ 180.973148][ T71] RAX: 0000000000000000 RBX: ffffffffc06e9f00 RCX: ffffffff9af0e74f [ 180.973573][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 180.974011][ T71] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a3f19 [ 180.974427][ T71] R10: ffffc9000051f8cf R11: 205d313754202020 R12: ffff888006922610 [ 180.974846][ T71] R13: ffff888006922dd8 R14: ffffc9000051fc98 R15: ffff888006922ba0 [ 180.975267][ T71] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 180.975736][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 180.976091][ T71] CR2: 00007f58eb0d5270 CR3: 0000000006acc006 CR4: 00000000001706f0 [ 180.976563][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 180.977119][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 180.977642][ T71] Call Trace: [ 180.977840][ T71] [ 180.978052][ T71] ? __warn (kernel/panic.c:677) [ 180.978364][ T71] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 180.978644][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 180.979098][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 180.979405][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 180.979673][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 180.979940][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 180.980270][ T71] ? 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) [ 180.980549][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 180.980903][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 180.981265][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 180.981664][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 180.981948][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 180.982320][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 180.982687][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 180.983004][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 180.983279][ T71] process_one_work (kernel/workqueue.c:2638) [ 180.983562][ T71] ? 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) [ 180.983925][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 180.984253][ T71] ? assign_work (kernel/workqueue.c:1101) [ 180.984539][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 180.984852][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 180.985241][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 180.985585][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 180.985890][ T71] kthread (kernel/kthread.c:388) [ 180.986178][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 180.986466][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 180.986757][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 180.987050][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 181.180155][ T71] ------------[ cut here ]------------ | [ 181.180494][ T71] sysfs group 'bridge' not found for kobject 'br2' | [ 181.180889][ T71] WARNING: CPU: 2 PID: 71 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 181.181391][ T71] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_mirred cls_flower 8021q bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth [ 181.182980][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 181.183750][ T71] Workqueue: netns cleanup_net [ 181.184041][ T71] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 181.184403][ T71] 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 9c 9d 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 9c 9d mov $0xffffffff9d9c99a0,%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 [ 181.185554][ T71] RSP: 0018:ffffc9000051fba0 EFLAGS: 00010282 [ 181.185900][ T71] RAX: 0000000000000000 RBX: ffffffffc06e9f00 RCX: ffffffff9af0e74f [ 181.186355][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 181.186799][ T71] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a3f19 [ 181.187258][ T71] R10: ffffc9000051f8cf R11: 205d313754202020 R12: ffff888007652610 [ 181.187699][ T71] R13: ffff888007652dd8 R14: ffffc9000051fc98 R15: ffff888007652ba0 [ 181.188155][ T71] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 181.188668][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 181.189120][ T71] CR2: 00007ffd34e59f98 CR3: 000000002f8a4004 CR4: 00000000001706f0 [ 181.189557][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 181.189976][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 181.190463][ T71] Call Trace: [ 181.190675][ T71] [ 181.190846][ T71] ? __warn (kernel/panic.c:677) [ 181.191097][ T71] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 181.191365][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 181.191679][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 181.191977][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 181.192240][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 181.192525][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 181.192839][ T71] ? 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) [ 181.193133][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 181.193483][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 181.193836][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 181.194233][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 181.194547][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 181.194808][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 181.195176][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 181.195447][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 181.195864][ T71] process_one_work (kernel/workqueue.c:2638) [ 181.196299][ T71] ? 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) [ 181.196610][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 181.196965][ T71] ? assign_work (kernel/workqueue.c:1101) [ 181.197323][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 181.197644][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 181.198037][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 181.198356][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 181.198689][ T71] kthread (kernel/kthread.c:388) [ 181.198932][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 181.199197][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 181.199473][ T71] ? __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