====================================== | [ 683.701049][ T11] ================================================================== | [ 683.701499][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 683.701922][ T11] Read of size 1 at addr ffff8880032f407c by task kworker/u8:0/11 | [ 683.702363][ T11] [ 683.702956][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 683.703655][ T11] Workqueue: netns cleanup_net [ 683.703919][ T11] Call Trace: [ 683.704099][ T11] [ 683.704255][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 683.704503][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 683.704856][ T11] ? kobject_put (lib/kobject.c:729) [ 683.705093][ T11] print_report (mm/kasan/report.c:489) [ 683.705329][ 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) [ 683.705598][ T11] kasan_report (mm/kasan/report.c:603) [ 683.705831][ T11] ? kobject_put (lib/kobject.c:729) [ 683.706070][ T11] kobject_put (lib/kobject.c:729) [ 683.706338][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 683.706609][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 683.706879][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 683.707170][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 683.707427][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 683.707747][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 683.708029][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 683.708276][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 683.708574][ T11] process_one_work (kernel/workqueue.c:2638) [ 683.708880][ 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) [ 683.709133][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 683.709443][ T11] ? assign_work (kernel/workqueue.c:1101) [ 683.709726][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 683.710002][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 683.710286][ T11] kthread (kernel/kthread.c:388) [ 683.710522][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.710790][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 683.711049][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.711302][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 683.731155][ T11] ------------[ cut here ]------------ | [ 683.731515][ T11] refcount_t: underflow; use-after-free. | [ 683.731848][ T11] WARNING: CPU: 1 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 683.732402][ T11] Modules linked in: xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core cls_bpf sch_ingress xt_conntrack nf_conntrack nf_defrag_ipv4 nft_compat nf_tables libcrc32c nf_defrag_ipv6 vxlan ip6_udp_tunnel udp_tunnel [ 683.734304][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 683.734948][ T11] Workqueue: netns cleanup_net [ 683.735281][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 683.735608][ 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 e2 b4 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 e2 b4 mov $0xffffffffb4e27a20,%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 [ 683.736696][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 683.737025][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb211056f [ 683.737501][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 683.737919][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 683.738390][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800ac32000 [ 683.738810][ T11] R13: ffff88800ac32df8 R14: ffffc900000bfc98 R15: ffff88800ac32bc0 [ 683.739287][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 683.739756][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 683.740160][ T11] CR2: 00007ffeebdc2cb8 CR3: 000000001b334006 CR4: 00000000001706f0 [ 683.740582][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 683.740999][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 683.741475][ T11] Call Trace: [ 683.741652][ T11] [ 683.741813][ T11] ? __warn (kernel/panic.c:677) [ 683.742077][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 683.742448][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 683.742718][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 683.742976][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 683.743266][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 683.743540][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 683.743840][ 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) [ 683.744078][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 683.744445][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 683.744760][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 683.745031][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 683.745335][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 683.745640][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 683.745890][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 683.746263][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 683.746569][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 683.746838][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 683.747164][ T11] process_one_work (kernel/workqueue.c:2638) [ 683.747438][ 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) [ 683.747677][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 683.747958][ T11] ? assign_work (kernel/workqueue.c:1101) [ 683.748257][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 683.748512][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 683.748783][ T11] kthread (kernel/kthread.c:388) [ 683.749004][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.749303][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 683.749544][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.749787][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 683.753073][ T11] ------------[ cut here ]------------ | [ 683.753595][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 683.754049][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 683.754583][ T11] Modules linked in: xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core cls_bpf sch_ingress xt_conntrack nf_conntrack nf_defrag_ipv4 nft_compat nf_tables libcrc32c nf_defrag_ipv6 vxlan ip6_udp_tunnel udp_tunnel [ 683.756330][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 683.756978][ T11] Workqueue: netns cleanup_net [ 683.757249][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 683.757613][ 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 dc b4 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 dc b4 mov $0xffffffffb4dca7a0,%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 [ 683.759101][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 683.759625][ T11] RAX: 0000000000000000 RBX: ffffffffb51be220 RCX: ffffffffb211056f [ 683.760260][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 683.760879][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 683.761504][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800ac32628 [ 683.762132][ T11] R13: ffff88800ac32df8 R14: ffffc900000bfc98 R15: ffff88800ac32bc0 [ 683.762796][ T11] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 683.763550][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 683.764135][ T11] CR2: 00007fe103ba4000 CR3: 000000001b334004 CR4: 00000000001706f0 [ 683.764810][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 683.765414][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 683.766100][ T11] Call Trace: [ 683.766370][ T11] [ 683.766647][ T11] ? __warn (kernel/panic.c:677) [ 683.766991][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 683.767389][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 683.767836][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 683.768239][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 683.768596][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 683.768991][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 683.769429][ 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) [ 683.769737][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 683.770015][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 683.770281][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 683.770565][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 683.770806][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 683.771116][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 683.771383][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 683.771709][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 683.772028][ T11] process_one_work (kernel/workqueue.c:2638) [ 683.772391][ 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) [ 683.772752][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 683.773221][ T11] ? assign_work (kernel/workqueue.c:1101) [ 683.773647][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 683.774056][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 683.774502][ T11] kthread (kernel/kthread.c:388) [ 683.774855][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.775267][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 683.775653][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.776057][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 683.973884][ T11] ------------[ cut here ]------------ | [ 683.974357][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 683.975048][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 683.975873][ T11] Modules linked in: xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core cls_bpf sch_ingress xt_conntrack nf_conntrack nf_defrag_ipv4 nft_compat nf_tables libcrc32c nf_defrag_ipv6 vxlan ip6_udp_tunnel udp_tunnel [ 683.978576][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 683.979674][ T11] Workqueue: netns cleanup_net [ 683.980141][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 683.980658][ 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 dc b4 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 dc b4 mov $0xffffffffb4dca7a0,%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 [ 683.982393][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 683.982951][ T11] RAX: 0000000000000000 RBX: ffffffffb51be220 RCX: ffffffffb211056f [ 683.983587][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 683.984225][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 683.984852][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888006c42628 [ 683.985484][ T11] R13: ffff888006c42df8 R14: ffffc900000bfc98 R15: ffff888006c42bc0 [ 683.986211][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 683.987012][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 683.987601][ T11] CR2: 00000000018e2a28 CR3: 000000001b334006 CR4: 00000000001706f0 [ 683.988326][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 683.989051][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 683.989756][ T11] Call Trace: [ 683.990055][ T11] [ 683.990321][ T11] ? __warn (kernel/panic.c:677) [ 683.990687][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 683.991112][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 683.991594][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 683.992013][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 683.992423][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 683.992831][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 683.993207][ 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) [ 683.993506][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 683.993791][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 683.994074][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 683.994419][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 683.994683][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 683.994984][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 683.995294][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 683.995599][ T11] process_one_work (kernel/workqueue.c:2638) [ 683.995912][ 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) [ 683.996158][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 683.996443][ T11] ? assign_work (kernel/workqueue.c:1101) [ 683.996725][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 683.997014][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 683.997288][ T11] kthread (kernel/kthread.c:388) [ 683.997508][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 683.997754][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 683.997993][ 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