====================================== | [ 287.626334][ T71] ================================================================== | [ 287.626779][ T71] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 287.627168][ T71] Read of size 1 at addr ffff888002c0a93c by task kworker/u8:1/71 | [ 287.627659][ T71] [ 287.628214][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 287.628908][ T71] Workqueue: netns cleanup_net [ 287.629174][ T71] Call Trace: [ 287.629364][ T71] [ 287.629523][ T71] dump_stack_lvl (lib/dump_stack.c:107) [ 287.629781][ T71] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 287.630137][ T71] ? kobject_put (lib/kobject.c:729) [ 287.630389][ T71] print_report (mm/kasan/report.c:489) [ 287.630626][ T71] ? 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) [ 287.630898][ T71] kasan_report (mm/kasan/report.c:603) [ 287.631132][ T71] ? kobject_put (lib/kobject.c:729) [ 287.631389][ T71] kobject_put (lib/kobject.c:729) [ 287.631618][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 287.631989][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 287.632320][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 287.632675][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 287.632915][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 287.633227][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 287.633495][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 287.633747][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 287.634027][ T71] process_one_work (kernel/workqueue.c:2638) [ 287.634299][ T71] ? 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) [ 287.634546][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 287.634836][ T71] ? assign_work (kernel/workqueue.c:1101) [ 287.635086][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 287.635350][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 287.635698][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.635969][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.636256][ T71] kthread (kernel/kthread.c:388) [ 287.636475][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.636724][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 287.636962][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.637211][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 287.656482][ T71] ------------[ cut here ]------------ | [ 287.657015][ T71] refcount_t: underflow; use-after-free. | [ 287.657369][ T71] WARNING: CPU: 0 PID: 71 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 287.657920][ T71] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel sch_ingress bridge stp llc 8021q vrf veth [ 287.659217][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 287.659947][ T71] Workqueue: netns cleanup_net [ 287.660208][ T71] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 287.660532][ T71] 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 b0 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 b0 e8 5e 4c 2b ff movabs %al,0xf90ff2b4c5ee8b0 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 [ 287.661555][ T71] RSP: 0018:ffffc9000050fb98 EFLAGS: 00010282 [ 287.661885][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffadf0e74f [ 287.662321][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 287.662746][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a1f18 [ 287.663163][ T71] R10: ffffc9000050f8c7 R11: 205d313754202020 R12: ffff88800600a000 [ 287.663590][ T71] R13: ffff88800600add8 R14: ffffc9000050fc98 R15: ffff88800600aba0 [ 287.664070][ T71] FS: 0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000 [ 287.664603][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.665000][ T71] CR2: 00005614d787a45c CR3: 00000000059d8002 CR4: 00000000001706f0 [ 287.665456][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.665925][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.666396][ T71] Call Trace: [ 287.666576][ T71] [ 287.666785][ T71] ? __warn (kernel/panic.c:677) [ 287.667034][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 287.667334][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 287.667625][ T71] ? vprintk_emit (kernel/printk/printk.c:2313) [ 287.667880][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 287.668153][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 287.668405][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 287.668741][ T71] ? 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) [ 287.668984][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 287.669278][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 287.669587][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 287.669974][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 287.670353][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 287.670758][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 287.671024][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 287.671370][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 287.671702][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 287.672031][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 287.672307][ T71] process_one_work (kernel/workqueue.c:2638) [ 287.672625][ T71] ? 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) [ 287.672874][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 287.673213][ T71] ? assign_work (kernel/workqueue.c:1101) [ 287.673511][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 287.673804][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 287.674157][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.674431][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.674772][ T71] kthread (kernel/kthread.c:388) [ 287.674990][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.675306][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 287.675549][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.675854][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 287.679009][ T71] ------------[ cut here ]------------ | [ 287.679298][ T71] sysfs group 'bridge' not found for kobject 'br2' | [ 287.679689][ T71] WARNING: CPU: 0 PID: 71 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 287.680256][ T71] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel sch_ingress bridge stp llc 8021q vrf veth [ 287.682312][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 287.683113][ T71] Workqueue: netns cleanup_net [ 287.683462][ T71] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 287.683885][ T71] 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 b0 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 b0 mov $0xffffffffb09c99a0,%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 [ 287.685038][ T71] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 287.685506][ T71] RAX: 0000000000000000 RBX: ffffffffc03b8f00 RCX: ffffffffadf0e74f [ 287.686046][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 287.686568][ T71] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 287.687082][ T71] R10: ffffc9000050f8cf R11: 205d313754202020 R12: ffff88800600a610 [ 287.687538][ T71] R13: ffff88800600add8 R14: ffffc9000050fc98 R15: ffff88800600aba0 [ 287.688003][ T71] FS: 0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000 [ 287.688520][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.688875][ T71] CR2: 00005614d787a45c CR3: 00000000059d8002 CR4: 00000000001706f0 [ 287.689331][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.689842][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.690327][ T71] Call Trace: [ 287.690572][ T71] [ 287.690783][ T71] ? __warn (kernel/panic.c:677) [ 287.691061][ T71] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 287.691398][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 287.691771][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 287.692074][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 287.692364][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 287.692662][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 287.692974][ T71] ? 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) [ 287.693304][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 287.693655][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 287.694039][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 287.694457][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 287.694730][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 287.695109][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 287.695445][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 287.695765][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 287.696089][ T71] process_one_work (kernel/workqueue.c:2638) [ 287.696420][ T71] ? 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) [ 287.696705][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 287.697020][ T71] ? assign_work (kernel/workqueue.c:1101) [ 287.697322][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 287.697638][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 287.698047][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.698399][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.698734][ T71] kthread (kernel/kthread.c:388) [ 287.698999][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.699310][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 287.699600][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.699889][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 287.959346][ T71] ------------[ cut here ]------------ | [ 287.959763][ T71] sysfs group 'bridge' not found for kobject 'br2' | [ 287.960200][ T71] WARNING: CPU: 1 PID: 71 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 287.960766][ T71] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel sch_ingress bridge stp llc 8021q vrf veth [ 287.962048][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 287.962769][ T71] Workqueue: netns cleanup_net [ 287.963064][ T71] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 287.963447][ T71] 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 b0 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 b0 mov $0xffffffffb09c99a0,%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 [ 287.964587][ T71] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 287.964930][ T71] RAX: 0000000000000000 RBX: ffffffffc03b8f00 RCX: ffffffffadf0e74f [ 287.965372][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 287.965814][ T71] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 287.966256][ T71] R10: ffffc9000050f8cf R11: 205d313754202020 R12: ffff88800677a610 [ 287.966705][ T71] R13: ffff88800677add8 R14: ffffc9000050fc98 R15: ffff88800677aba0 [ 287.967149][ T71] FS: 0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000 [ 287.967751][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.968151][ T71] CR2: 000055d538b12dec CR3: 000000003911e003 CR4: 00000000001706f0 [ 287.968631][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.969138][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.969589][ T71] Call Trace: [ 287.969785][ T71] [ 287.969955][ T71] ? __warn (kernel/panic.c:677) [ 287.970174][ T71] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 287.970435][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 287.970746][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 287.970993][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 287.971225][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 287.971471][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 287.971749][ T71] ? 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) [ 287.971987][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 287.972268][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 287.972614][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 287.972972][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 287.973214][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 287.973464][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 287.973733][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 287.973987][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 287.974273][ T71] process_one_work (kernel/workqueue.c:2638) [ 287.974552][ T71] ? 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) [ 287.974822][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 287.975125][ T71] ? assign_work (kernel/workqueue.c:1101) [ 287.975382][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 287.975654][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 287.976019][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.976291][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 287.976568][ T71] kthread (kernel/kthread.c:388) [ 287.976790][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 287.977049][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 287.977293][ T71] ? __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