====================================== | [ 788.318162][ T11] ================================================================== | [ 788.318646][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 788.319127][ T11] Read of size 1 at addr ffff8880068aecfc by task kworker/u8:0/11 | [ 788.319578][ T11] [ 788.320231][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 788.320961][ T11] Workqueue: netns cleanup_net [ 788.321282][ T11] Call Trace: [ 788.321491][ T11] [ 788.321674][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 788.321928][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 788.322353][ T11] ? kobject_put (lib/kobject.c:729) [ 788.322633][ T11] print_report (mm/kasan/report.c:489) [ 788.322896][ 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) [ 788.323195][ T11] kasan_report (mm/kasan/report.c:603) [ 788.323464][ T11] ? kobject_put (lib/kobject.c:729) [ 788.323750][ T11] kobject_put (lib/kobject.c:729) [ 788.324031][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 788.324418][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 788.324783][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 788.325159][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 788.325432][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 788.325794][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 788.326087][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 788.326413][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 788.326754][ T11] process_one_work (kernel/workqueue.c:2638) [ 788.327061][ 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) [ 788.327353][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 788.327680][ T11] ? assign_work (kernel/workqueue.c:1101) [ 788.327930][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 788.328208][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 788.328513][ T11] kthread (kernel/kthread.c:388) [ 788.328766][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.329022][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 788.329283][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.329551][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 788.350325][ T11] ------------[ cut here ]------------ | [ 788.350631][ T11] refcount_t: underflow; use-after-free. | [ 788.351161][ T11] WARNING: CPU: 1 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 788.351751][ T11] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth [ 788.353182][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 788.353956][ T11] Workqueue: netns cleanup_net [ 788.354256][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 788.354596][ 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 89 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 89 e8 5e 4c 2b ff movabs %al,0xf90ff2b4c5ee889 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 [ 788.355669][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 788.356047][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff86f0e74f [ 788.356500][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 788.356994][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 788.357483][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800a5e2000 [ 788.357972][ T11] R13: ffff88800a5e2dd8 R14: ffffc900000bfc98 R15: ffff88800a5e2ba0 [ 788.358441][ T11] FS: 0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000 [ 788.359106][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 788.359535][ T11] CR2: 00005610d05c5dec CR3: 000000000753c003 CR4: 00000000001706f0 [ 788.360085][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 788.360522][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 788.361001][ T11] Call Trace: [ 788.361209][ T11] [ 788.361398][ T11] ? __warn (kernel/panic.c:677) [ 788.361673][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 788.362017][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 788.362324][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 788.362611][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 788.362994][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 788.363247][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 788.363533][ 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) [ 788.363814][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 788.364145][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 788.364446][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 788.364779][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 788.365156][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 788.365540][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 788.365796][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 788.366125][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 788.366421][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 788.366689][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 788.366997][ T11] process_one_work (kernel/workqueue.c:2638) [ 788.367292][ 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) [ 788.367613][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 788.367954][ T11] ? assign_work (kernel/workqueue.c:1101) [ 788.368250][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 788.368528][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 788.368843][ T11] kthread (kernel/kthread.c:388) [ 788.369114][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.369386][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 788.369755][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.370012][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 788.373588][ T11] ------------[ cut here ]------------ | [ 788.373928][ T11] sysfs group 'bridge' not found for kobject 'br2' | [ 788.374337][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 788.374862][ T11] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth [ 788.376471][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 788.377261][ T11] Workqueue: netns cleanup_net [ 788.377590][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 788.378052][ 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 89 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 89 mov $0xffffffff899c99a0,%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 [ 788.379265][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 788.379690][ T11] RAX: 0000000000000000 RBX: ffffffffc050ff00 RCX: ffffffff86f0e74f [ 788.380195][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 788.380698][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 788.381183][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a5e2610 [ 788.381720][ T11] R13: ffff88800a5e2dd8 R14: ffffc900000bfc98 R15: ffff88800a5e2ba0 [ 788.382212][ T11] FS: 0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000 [ 788.382723][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 788.383146][ T11] CR2: 00005610d05c5dec CR3: 000000000753c003 CR4: 00000000001706f0 [ 788.383613][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 788.384086][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 788.384678][ T11] Call Trace: [ 788.384857][ T11] [ 788.385058][ T11] ? __warn (kernel/panic.c:677) [ 788.385300][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 788.385592][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 788.385926][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 788.386192][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 788.386433][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 788.386752][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 788.387132][ 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) [ 788.387385][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 788.387702][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 788.388077][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 788.388456][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 788.388693][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 788.389028][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 788.389318][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 788.389582][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 788.389904][ T11] process_one_work (kernel/workqueue.c:2638) [ 788.390204][ 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) [ 788.390479][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 788.390808][ T11] ? assign_work (kernel/workqueue.c:1101) [ 788.391098][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 788.391354][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 788.391642][ T11] kthread (kernel/kthread.c:388) [ 788.391897][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.392161][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 788.392411][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.392697][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 788.591861][ T11] ------------[ cut here ]------------ | [ 788.592195][ T11] sysfs group 'bridge' not found for kobject 'br2' | [ 788.592644][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 788.593167][ T11] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth [ 788.594441][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 788.595171][ T11] Workqueue: netns cleanup_net [ 788.595451][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 788.595781][ 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 89 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 89 mov $0xffffffff899c99a0,%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 [ 788.596933][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 788.597344][ T11] RAX: 0000000000000000 RBX: ffffffffc050ff00 RCX: ffffffff86f0e74f [ 788.597843][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 788.598343][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 788.598858][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888007172610 [ 788.599384][ T11] R13: ffff888007172dd8 R14: ffffc900000bfc98 R15: ffff888007172ba0 [ 788.599911][ T11] FS: 0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000 [ 788.600444][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 788.600884][ T11] CR2: 00007fe18efc3270 CR3: 000000000ae86005 CR4: 00000000001706f0 [ 788.601359][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 788.601856][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 788.602375][ T11] Call Trace: [ 788.602571][ T11] [ 788.602764][ T11] ? __warn (kernel/panic.c:677) [ 788.603038][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 788.603346][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 788.603667][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 788.603922][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 788.604161][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 788.604410][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 788.604681][ 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) [ 788.604925][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 788.605208][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 788.605549][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 788.605911][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 788.606191][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 788.606473][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 788.606796][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 788.607068][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 788.607352][ T11] process_one_work (kernel/workqueue.c:2638) [ 788.607689][ 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) [ 788.608068][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 788.608406][ T11] ? assign_work (kernel/workqueue.c:1101) [ 788.608688][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 788.608997][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 788.609326][ T11] kthread (kernel/kthread.c:388) [ 788.609571][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 788.609918][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 788.610202][ 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