====================================== | [ 836.771209][ T11] ================================================================== | [ 836.771756][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 836.772239][ T11] Read of size 1 at addr ffff8880035cb33c by task kworker/u8:0/11 | [ 836.772716][ T11] [ 836.773306][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 836.774079][ T11] Workqueue: netns cleanup_net [ 836.774406][ T11] Call Trace: [ 836.774631][ T11] [ 836.774853][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 836.775185][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 836.775618][ T11] ? kobject_put (lib/kobject.c:729) [ 836.775859][ T11] print_report (mm/kasan/report.c:489) [ 836.776100][ 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) [ 836.776381][ T11] kasan_report (mm/kasan/report.c:603) [ 836.776617][ T11] ? kobject_put (lib/kobject.c:729) [ 836.776900][ T11] kobject_put (lib/kobject.c:729) [ 836.777168][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 836.777571][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 836.777935][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 836.778441][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 836.778772][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 836.779237][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 836.779667][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 836.780035][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 836.780466][ T11] process_one_work (kernel/workqueue.c:2638) [ 836.780793][ 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) [ 836.781071][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 836.781463][ T11] ? assign_work (kernel/workqueue.c:1101) [ 836.781800][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 836.782085][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 836.782430][ T11] kthread (kernel/kthread.c:388) [ 836.782695][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 836.782941][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 836.783197][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 836.783444][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 836.805533][ T11] ------------[ cut here ]------------ | [ 836.805851][ T11] refcount_t: underflow; use-after-free. | [ 836.806227][ T11] WARNING: CPU: 2 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 836.806799][ T11] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth [ 836.808150][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 836.808868][ T11] Workqueue: netns cleanup_net [ 836.809175][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 836.809592][ T11] 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 b3 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 b3 e8 5e 4c 2b ff movabs %al,0xf90ff2b4c5ee8b3 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 [ 836.810756][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 836.811229][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb0f0e74f [ 836.811712][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 836.812178][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 836.812699][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800a872000 [ 836.813186][ T11] R13: ffff88800a872dd8 R14: ffffc900000bfc98 R15: ffff88800a872ba0 [ 836.813665][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 836.814246][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 836.814605][ T11] CR2: 000055da9042d0b8 CR3: 0000000006f2e004 CR4: 00000000001706f0 [ 836.815087][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 836.815558][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 836.816021][ T11] Call Trace: [ 836.816219][ T11] [ 836.816433][ T11] ? __warn (kernel/panic.c:677) [ 836.816689][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 836.817014][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 836.817257][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 836.817511][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 836.817748][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 836.818004][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 836.818280][ 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) [ 836.818527][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 836.818826][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 836.819125][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 836.819463][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 836.819795][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 836.820153][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 836.820402][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 836.820703][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 836.820972][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 836.821236][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 836.821527][ T11] process_one_work (kernel/workqueue.c:2638) [ 836.821795][ 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) [ 836.822042][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 836.822431][ T11] ? assign_work (kernel/workqueue.c:1101) [ 836.822684][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 836.822942][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 836.823219][ T11] kthread (kernel/kthread.c:388) [ 836.823441][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 836.823716][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 836.823970][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 836.824243][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 836.827882][ T11] ------------[ cut here ]------------ | [ 836.828183][ T11] sysfs group 'bridge' not found for kobject 'br2' | [ 836.828569][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 836.829157][ T11] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth [ 836.830495][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 836.831245][ T11] Workqueue: netns cleanup_net [ 836.831549][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 836.831903][ 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 99 9c b3 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 b3 mov $0xffffffffb39c99a0,%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 [ 836.833060][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 836.833391][ T11] RAX: 0000000000000000 RBX: ffffffffc06ddf00 RCX: ffffffffb0f0e74f [ 836.833817][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 836.834238][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 836.834665][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a872610 [ 836.835091][ T11] R13: ffff88800a872dd8 R14: ffffc900000bfc98 R15: ffff88800a872ba0 [ 836.835519][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 836.836045][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 836.836535][ T11] CR2: 000055da9042d0b8 CR3: 0000000006f2e004 CR4: 00000000001706f0 [ 836.837018][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 836.837588][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 836.838052][ T11] Call Trace: [ 836.838303][ T11] [ 836.838464][ T11] ? __warn (kernel/panic.c:677) [ 836.838713][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 836.839042][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 836.839334][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 836.839581][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 836.839831][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 836.840107][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 836.840410][ 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) [ 836.840659][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 836.840955][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 836.841335][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 836.841699][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 836.841939][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 836.842245][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 836.842519][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 836.842777][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 836.843056][ T11] process_one_work (kernel/workqueue.c:2638) [ 836.843342][ 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) [ 836.843616][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 836.843936][ T11] ? assign_work (kernel/workqueue.c:1101) [ 836.844197][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 836.844492][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 836.844792][ T11] kthread (kernel/kthread.c:388) [ 836.845029][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 836.845303][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 836.845585][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 836.845902][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 837.078137][ T11] ------------[ cut here ]------------ | [ 837.078505][ T11] sysfs group 'bridge' not found for kobject 'br2' | [ 837.078953][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 837.079532][ T11] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth [ 837.080885][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 837.081646][ T11] Workqueue: netns cleanup_net [ 837.081909][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 837.082255][ 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 99 9c b3 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 b3 mov $0xffffffffb39c99a0,%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 [ 837.083295][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 837.083656][ T11] RAX: 0000000000000000 RBX: ffffffffc06ddf00 RCX: ffffffffb0f0e74f [ 837.084100][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 837.084568][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 837.085009][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009242610 [ 837.085497][ T11] R13: ffff888009242dd8 R14: ffffc900000bfc98 R15: ffff888009242ba0 [ 837.085939][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 837.086443][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 837.086795][ T11] CR2: 00007fe20ce52270 CR3: 0000000028b1e006 CR4: 00000000001706f0 [ 837.087248][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 837.087734][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 837.088183][ T11] Call Trace: [ 837.088367][ T11] [ 837.088547][ T11] ? __warn (kernel/panic.c:677) [ 837.088820][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 837.089094][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 837.089378][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 837.089645][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 837.089899][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 837.090156][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 837.090439][ 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) [ 837.090681][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 837.090999][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 837.091379][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 837.091755][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 837.091996][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 837.092254][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 837.092528][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 837.092780][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 837.093057][ T11] process_one_work (kernel/workqueue.c:2638) [ 837.093335][ 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) [ 837.093580][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 837.093867][ T11] ? assign_work (kernel/workqueue.c:1101) [ 837.094113][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 837.094378][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 837.094655][ T11] kthread (kernel/kthread.c:388) [ 837.094875][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 837.095127][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 837.095377][ 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