====================================== | [ 488.456984][ T11] ================================================================== | [ 488.457494][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 488.457906][ T11] Read of size 1 at addr ffff8880023dae3c by task kworker/u8:0/11 | [ 488.458329][ T11] [ 488.458893][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 488.459549][ T11] Workqueue: netns cleanup_net [ 488.459810][ T11] Call Trace: [ 488.460008][ T11] [ 488.460166][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 488.460433][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 488.460818][ T11] ? kobject_put (lib/kobject.c:729) [ 488.461096][ T11] print_report (mm/kasan/report.c:489) [ 488.461353][ 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) [ 488.461643][ T11] kasan_report (mm/kasan/report.c:603) [ 488.461890][ T11] ? kobject_put (lib/kobject.c:729) [ 488.462232][ T11] kobject_put (lib/kobject.c:729) [ 488.462521][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 488.462801][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 488.463091][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 488.463409][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 488.463648][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 488.463971][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 488.464285][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 488.464592][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 488.464918][ T11] process_one_work (kernel/workqueue.c:2638) [ 488.465225][ 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) [ 488.465503][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 488.465839][ T11] ? assign_work (kernel/workqueue.c:1101) [ 488.466213][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 488.466474][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 488.466746][ T11] kthread (kernel/kthread.c:388) [ 488.466967][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.467220][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 488.467473][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.467738][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 488.488963][ T11] ------------[ cut here ]------------ | [ 488.489330][ T11] refcount_t: underflow; use-after-free. | [ 488.489669][ T11] WARNING: CPU: 2 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 488.490315][ T11] Modules linked in: xfrm_interface sha1_generic xfrm_user sctp_diag sctp libcrc32c drop_monitor act_gact cls_flower sch_ingress netdevsim psample vxlan ip6_udp_tunnel udp_tunnel [ 488.492032][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 488.492766][ T11] Workqueue: netns cleanup_net [ 488.493087][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 488.493467][ 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 42 a5 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 42 a5 mov $0xffffffffa5427a20,%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 [ 488.494618][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 488.494945][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa271056f [ 488.495384][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 488.495844][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 488.496333][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff888005ee2000 [ 488.496848][ T11] R13: ffff888005ee2df8 R14: ffffc900000bfc98 R15: ffff888005ee2bc0 [ 488.497281][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 488.497747][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 488.498161][ T11] CR2: 00007fe86abaa000 CR3: 0000000016d34001 CR4: 00000000001706f0 [ 488.498574][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 488.499020][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 488.499438][ T11] Call Trace: [ 488.499633][ T11] [ 488.499789][ T11] ? __warn (kernel/panic.c:677) [ 488.500050][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 488.500365][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 488.500628][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 488.500891][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 488.501151][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 488.501401][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 488.501668][ 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) [ 488.501902][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 488.502214][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 488.502506][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 488.502749][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 488.503038][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 488.503361][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 488.503607][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 488.504006][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 488.504270][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 488.504534][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 488.504854][ T11] process_one_work (kernel/workqueue.c:2638) [ 488.505165][ 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) [ 488.505458][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 488.505763][ T11] ? assign_work (kernel/workqueue.c:1101) [ 488.506033][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 488.506310][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 488.506612][ T11] kthread (kernel/kthread.c:388) [ 488.506833][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.507123][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 488.507362][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.507604][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 488.510894][ T11] ------------[ cut here ]------------ | [ 488.511261][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 488.511636][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 488.512246][ T11] Modules linked in: xfrm_interface sha1_generic xfrm_user sctp_diag sctp libcrc32c drop_monitor act_gact cls_flower sch_ingress netdevsim psample vxlan ip6_udp_tunnel udp_tunnel [ 488.514219][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 488.515258][ T11] Workqueue: netns cleanup_net [ 488.515661][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 488.516308][ 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 3c a5 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 3c a5 mov $0xffffffffa53ca7a0,%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 [ 488.517958][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 488.518480][ T11] RAX: 0000000000000000 RBX: ffffffffa57be220 RCX: ffffffffa271056f [ 488.519177][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 488.519840][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 488.520513][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888005ee2628 [ 488.521197][ T11] R13: ffff888005ee2df8 R14: ffffc900000bfc98 R15: ffff888005ee2bc0 [ 488.521873][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 488.522595][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 488.523131][ T11] CR2: 00007fe86abaa000 CR3: 0000000016d34001 CR4: 00000000001706f0 [ 488.523764][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 488.524417][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 488.525118][ T11] Call Trace: [ 488.525396][ T11] [ 488.525657][ T11] ? __warn (kernel/panic.c:677) [ 488.526044][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 488.526470][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 488.526936][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 488.527329][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 488.527702][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 488.528112][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 488.528574][ 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) [ 488.529031][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 488.529372][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 488.529640][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 488.529962][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 488.530235][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 488.530555][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 488.530855][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 488.531157][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 488.531472][ T11] process_one_work (kernel/workqueue.c:2638) [ 488.531748][ 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) [ 488.532020][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 488.532335][ T11] ? assign_work (kernel/workqueue.c:1101) [ 488.532601][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 488.532878][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 488.533190][ T11] kthread (kernel/kthread.c:388) [ 488.533424][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.533687][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 488.533965][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.534210][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 488.684012][ T11] ------------[ cut here ]------------ | [ 488.684353][ T11] sysfs group 'bridge' not found for kobject 'br0' | [ 488.684768][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 488.685309][ T11] Modules linked in: xfrm_interface sha1_generic xfrm_user sctp_diag sctp libcrc32c drop_monitor act_gact cls_flower sch_ingress netdevsim psample vxlan ip6_udp_tunnel udp_tunnel [ 488.686773][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 488.687426][ T11] Workqueue: netns cleanup_net [ 488.687691][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 488.688012][ 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 3c a5 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 3c a5 mov $0xffffffffa53ca7a0,%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 [ 488.689106][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 488.689455][ T11] RAX: 0000000000000000 RBX: ffffffffa57be220 RCX: ffffffffa271056f [ 488.689915][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 488.690371][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 488.690830][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88801b5f2628 [ 488.691310][ T11] R13: ffff88801b5f2df8 R14: ffffc900000bfc98 R15: ffff88801b5f2bc0 [ 488.691764][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 488.692290][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 488.692679][ T11] CR2: 00007ffc56988c88 CR3: 0000000006a90006 CR4: 00000000001706f0 [ 488.693186][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 488.693629][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 488.694105][ T11] Call Trace: [ 488.694307][ T11] [ 488.694484][ T11] ? __warn (kernel/panic.c:677) [ 488.694727][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 488.695039][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 488.695323][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 488.695576][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 488.695818][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 488.696078][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 488.696351][ 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) [ 488.696596][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 488.696872][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 488.697136][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 488.697423][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 488.697707][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 488.697994][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 488.698265][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 488.698536][ T11] process_one_work (kernel/workqueue.c:2638) [ 488.698800][ 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) [ 488.699060][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 488.699349][ T11] ? assign_work (kernel/workqueue.c:1101) [ 488.699597][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 488.699854][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 488.700132][ T11] kthread (kernel/kthread.c:388) [ 488.700349][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 488.700589][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 488.700829][ 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