====================================== | [ 87.555103][ T11] ================================================================== | [ 87.555574][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 87.556001][ T11] Read of size 1 at addr ffff888005737d3c by task kworker/u8:0/11 | [ 87.556418][ T11] [ 87.557013][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 87.557697][ T11] Workqueue: netns cleanup_net [ 87.557980][ T11] Call Trace: [ 87.558176][ T11] [ 87.558343][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 87.558593][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 87.558993][ T11] ? kobject_put (lib/kobject.c:729) [ 87.559251][ T11] print_report (mm/kasan/report.c:489) [ 87.559498][ 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) [ 87.559767][ T11] kasan_report (mm/kasan/report.c:603) [ 87.560001][ T11] ? kobject_put (lib/kobject.c:729) [ 87.560243][ T11] kobject_put (lib/kobject.c:729) [ 87.560469][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 87.560841][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 87.561170][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 87.561519][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 87.561753][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 87.562052][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 87.562314][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 87.562569][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 87.562902][ T11] process_one_work (kernel/workqueue.c:2638) [ 87.563183][ 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) [ 87.563453][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 87.563777][ T11] ? assign_work (kernel/workqueue.c:1101) [ 87.564040][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 87.564309][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 87.564631][ T11] kthread (kernel/kthread.c:388) [ 87.564869][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.565124][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 87.565390][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.565685][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 87.586156][ T11] ------------[ cut here ]------------ | [ 87.586452][ T11] refcount_t: underflow; use-after-free. | [ 87.586822][ T11] WARNING: CPU: 2 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 87.587386][ T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel sch_ingress bridge stp llc 8021q vrf veth [ 87.588507][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 87.589214][ T11] Workqueue: netns cleanup_net [ 87.589491][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 87.589857][ 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 84 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 84 e8 5e 4c 2b ff movabs %al,0xf90ff2b4c5ee884 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 [ 87.591003][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 87.591390][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f0e74f [ 87.591832][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 87.592253][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 87.592733][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800abc2000 [ 87.593186][ T11] R13: ffff88800abc2dd8 R14: ffffc900000bfc98 R15: ffff88800abc2ba0 [ 87.593653][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 87.594206][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.594601][ T11] CR2: 0000555934aba45c CR3: 00000000056b4004 CR4: 00000000001706f0 [ 87.595070][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.595493][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.595978][ T11] Call Trace: [ 87.596275][ T11] [ 87.596445][ T11] ? __warn (kernel/panic.c:677) [ 87.596694][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 87.597057][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 87.597309][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 87.597589][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 87.597862][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 87.598113][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 87.598383][ 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) [ 87.598618][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 87.598913][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 87.599287][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 87.599652][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 87.599974][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 87.600336][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 87.600576][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 87.600872][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 87.601152][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 87.601405][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 87.601681][ T11] process_one_work (kernel/workqueue.c:2638) [ 87.601942][ 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) [ 87.602190][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 87.602479][ T11] ? assign_work (kernel/workqueue.c:1101) [ 87.602773][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 87.603109][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 87.603380][ T11] kthread (kernel/kthread.c:388) [ 87.603596][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.603838][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 87.604085][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.604329][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 87.607431][ T11] ------------[ cut here ]------------ | [ 87.607722][ T11] sysfs group 'bridge' not found for kobject 'br2' | [ 87.608113][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 87.608659][ T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel sch_ingress bridge stp llc 8021q vrf veth [ 87.609804][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 87.610488][ T11] Workqueue: netns cleanup_net [ 87.610774][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 87.611125][ 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 84 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 84 mov $0xffffffff849c99a0,%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 [ 87.612238][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 87.612559][ T11] RAX: 0000000000000000 RBX: ffffffffc0542f00 RCX: ffffffff81f0e74f [ 87.612981][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 87.613404][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 87.613827][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800abc2610 [ 87.614247][ T11] R13: ffff88800abc2dd8 R14: ffffc900000bfc98 R15: ffff88800abc2ba0 [ 87.614663][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 87.615134][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.615538][ T11] CR2: 0000555934aba45c CR3: 00000000056b4004 CR4: 00000000001706f0 [ 87.616001][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.616451][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.616894][ T11] Call Trace: [ 87.617092][ T11] [ 87.617278][ T11] ? __warn (kernel/panic.c:677) [ 87.617514][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 87.617773][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 87.618069][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 87.618361][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 87.618605][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 87.618879][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 87.619364][ 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) [ 87.619652][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 87.620091][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 87.620578][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 87.621191][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 87.621552][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 87.622181][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 87.622578][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 87.622936][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 87.623346][ T11] process_one_work (kernel/workqueue.c:2638) [ 87.623734][ 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) [ 87.624097][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 87.624553][ T11] ? assign_work (kernel/workqueue.c:1101) [ 87.624947][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 87.625354][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 87.625763][ T11] kthread (kernel/kthread.c:388) [ 87.626129][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.626508][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 87.626906][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.627304][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 87.831328][ T11] ------------[ cut here ]------------ | [ 87.831733][ T11] sysfs group 'bridge' not found for kobject 'br2' | [ 87.832196][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 87.832847][ T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel sch_ingress bridge stp llc 8021q vrf veth [ 87.834369][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 87.835141][ T11] Workqueue: netns cleanup_net [ 87.835456][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 87.835841][ 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 84 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 84 mov $0xffffffff849c99a0,%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 [ 87.837000][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 87.837365][ T11] RAX: 0000000000000000 RBX: ffffffffc0542f00 RCX: ffffffff81f0e74f [ 87.837827][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 87.838302][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 87.838880][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800aa7a610 [ 87.839389][ T11] R13: ffff88800aa7add8 R14: ffffc900000bfc98 R15: ffff88800aa7aba0 [ 87.839981][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 87.840626][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.841054][ T11] CR2: 00007fdfe7426270 CR3: 0000000008114002 CR4: 00000000001706f0 [ 87.841667][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.842156][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.842671][ T11] Call Trace: [ 87.842873][ T11] [ 87.843089][ T11] ? __warn (kernel/panic.c:677) [ 87.843340][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 87.843659][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 87.843972][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 87.844283][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 87.844597][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 87.844926][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 87.845281][ 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) [ 87.845584][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 87.845974][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 87.846377][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 87.846800][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 87.847059][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 87.847400][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 87.847723][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 87.848024][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 87.848324][ T11] process_one_work (kernel/workqueue.c:2638) [ 87.848673][ 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) [ 87.848949][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 87.849289][ T11] ? assign_work (kernel/workqueue.c:1101) [ 87.849591][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 87.849857][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 87.850150][ T11] kthread (kernel/kthread.c:388) [ 87.850389][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 87.850713][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 87.850950][ 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