====================================== | [ 122.826330][ T70] ================================================================== | [ 122.826778][ T70] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 122.827169][ T70] Read of size 1 at addr ffff88800274c93c by task kworker/u8:1/70 | [ 122.827583][ T70] [ 122.828141][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 122.828853][ T70] Workqueue: netns cleanup_net [ 122.829118][ T70] Call Trace: [ 122.829312][ T70] [ 122.829469][ T70] dump_stack_lvl (lib/dump_stack.c:107) [ 122.829730][ T70] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 122.830102][ T70] ? kobject_put (lib/kobject.c:729) [ 122.830338][ T70] print_report (mm/kasan/report.c:489) [ 122.830595][ T70] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) [ 122.830886][ T70] kasan_report (mm/kasan/report.c:603) [ 122.831116][ T70] ? kobject_put (lib/kobject.c:729) [ 122.831361][ T70] kobject_put (lib/kobject.c:729) [ 122.831611][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 122.831999][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 122.832336][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 122.832720][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 122.832988][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 122.833313][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 122.833599][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 122.833900][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 122.834195][ T70] process_one_work (kernel/workqueue.c:2638) [ 122.834482][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 122.834754][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 122.835047][ T70] ? assign_work (kernel/workqueue.c:1101) [ 122.835298][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 122.835551][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 122.835902][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 122.836199][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 122.836520][ T70] kthread (kernel/kthread.c:388) [ 122.836744][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 122.837008][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 122.837270][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 122.837559][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 122.857346][ T70] ------------[ cut here ]------------ | [ 122.857660][ T70] refcount_t: underflow; use-after-free. | [ 122.858024][ T70] WARNING: CPU: 3 PID: 70 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 122.858574][ T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ip6_gre ip6_tunnel tunnel6 gre dummy sch_tbf bridge stp llc act_gact cls_flower sch_ingress 8021q vrf veth [ 122.860037][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 122.860700][ T70] Workqueue: netns cleanup_net [ 122.860986][ T70] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 122.861324][ T70] 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 e2 aa 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: e2 aa loop 0xffffffffffffffce 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 [ 122.862500][ T70] RSP: 0018:ffffc9000050fb98 EFLAGS: 00010282 [ 122.862859][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa830e74f [ 122.863300][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 122.863737][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a1f18 [ 122.864316][ T70] R10: ffffc9000050f8c7 R11: 205d303754202020 R12: ffff888008192000 [ 122.864797][ T70] R13: ffff888008192dd8 R14: ffffc9000050fc98 R15: ffff888008192ba0 [ 122.865280][ T70] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 122.865746][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 122.866098][ T70] CR2: 00007f8e8bd8b000 CR3: 0000000002808005 CR4: 00000000001706f0 [ 122.866521][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 122.866951][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 122.867383][ T70] Call Trace: [ 122.867559][ T70] [ 122.867715][ T70] ? __warn (kernel/panic.c:677) [ 122.867955][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 122.868263][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 122.868551][ T70] ? vprintk_emit (kernel/printk/printk.c:2313) [ 122.868809][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 122.869050][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 122.869297][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 122.869568][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 122.869804][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 122.870104][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 122.870400][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 122.870731][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 122.871056][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 122.871407][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 122.871645][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 122.871968][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 122.872235][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 122.872512][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 122.872784][ T70] process_one_work (kernel/workqueue.c:2638) [ 122.873056][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 122.873298][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 122.873581][ T70] ? assign_work (kernel/workqueue.c:1101) [ 122.873826][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 122.874080][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 122.874431][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 122.874702][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 122.874976][ T70] kthread (kernel/kthread.c:388) [ 122.875193][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 122.875436][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 122.875673][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 122.875925][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 122.879062][ T70] ------------[ cut here ]------------ | [ 122.879349][ T70] sysfs group 'bridge' not found for kobject 'br2' | [ 122.879715][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 122.880413][ T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ip6_gre ip6_tunnel tunnel6 gre dummy sch_tbf bridge stp llc act_gact cls_flower sch_ingress 8021q vrf veth [ 122.882005][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 122.882674][ T70] Workqueue: netns cleanup_net [ 122.882972][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 122.883302][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 99 dc aa 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 dc aa mov $0xffffffffaadc99a0,%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 [ 122.884411][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 122.884782][ T70] RAX: 0000000000000000 RBX: ffffffffc0452f00 RCX: ffffffffa830e74f [ 122.885221][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 122.885640][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 122.886138][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008192610 [ 122.886552][ T70] R13: ffff888008192dd8 R14: ffffc9000050fc98 R15: ffff888008192ba0 [ 122.886970][ T70] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 122.887434][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 122.887782][ T70] CR2: 00007f8e8bd8b000 CR3: 0000000023f1e004 CR4: 00000000001706f0 [ 122.888229][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 122.888703][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 122.889166][ T70] Call Trace: [ 122.889361][ T70] [ 122.889535][ T70] ? __warn (kernel/panic.c:677) [ 122.889769][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 122.890061][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 122.890341][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 122.890615][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 122.890886][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 122.891238][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 122.891535][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 122.891775][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 122.892104][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 122.892490][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 122.892849][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 122.893186][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 122.893503][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 122.893774][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 122.894138][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 122.894446][ T70] process_one_work (kernel/workqueue.c:2638) [ 122.894730][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 122.895074][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 122.895385][ T70] ? assign_work (kernel/workqueue.c:1101) [ 122.895646][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 122.895927][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 122.896302][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 122.896576][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 122.896844][ T70] kthread (kernel/kthread.c:388) [ 122.897065][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 122.897311][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 122.897547][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 122.897792][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 123.107927][ T70] ------------[ cut here ]------------ | [ 123.108356][ T70] sysfs group 'bridge' not found for kobject 'br2' | [ 123.108839][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 123.109431][ T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ip6_gre ip6_tunnel tunnel6 gre dummy sch_tbf bridge stp llc act_gact cls_flower sch_ingress 8021q vrf veth [ 123.110986][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 123.111771][ T70] Workqueue: netns cleanup_net [ 123.112091][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 123.112450][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 99 dc aa 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 dc aa mov $0xffffffffaadc99a0,%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 [ 123.113675][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 123.114102][ T70] RAX: 0000000000000000 RBX: ffffffffc0452f00 RCX: ffffffffa830e74f [ 123.114595][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 123.115047][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 123.115533][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008c52610 [ 123.116064][ T70] R13: ffff888008c52dd8 R14: ffffc9000050fc98 R15: ffff888008c52ba0 [ 123.116570][ T70] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 123.117182][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.117541][ T70] CR2: 000055e29769be28 CR3: 000000000a6fa003 CR4: 00000000001706f0 [ 123.118031][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 123.118498][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 123.119036][ T70] Call Trace: [ 123.119210][ T70] [ 123.119388][ T70] ? __warn (kernel/panic.c:677) [ 123.119606][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 123.119898][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 123.120234][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 123.120505][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 123.120785][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 123.121184][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 123.121483][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 123.121755][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 123.122082][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 123.122467][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 123.122938][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 123.123235][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 123.123507][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 123.123797][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 123.124077][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 123.124404][ T70] process_one_work (kernel/workqueue.c:2638) [ 123.124667][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 123.125061][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 123.125385][ T70] ? assign_work (kernel/workqueue.c:1101) [ 123.125773][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 123.126117][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 123.126531][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 123.126834][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 123.127134][ T70] kthread (kernel/kthread.c:388) [ 123.127393][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 123.127691][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 123.127979][ T70] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: dump_stack_lvl:print_report:kasan_report:kobject_put refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net