====================================== | [ 74.954906][ T70] ================================================================== | [ 74.955418][ T70] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 74.955809][ T70] Read of size 1 at addr ffff888004edc6bc by task kworker/u8:1/70 | [ 74.956256][ T70] [ 74.956810][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 74.957469][ T70] Workqueue: netns cleanup_net [ 74.957725][ T70] Call Trace: [ 74.957942][ T70] [ 74.958110][ T70] dump_stack_lvl (lib/dump_stack.c:107) [ 74.958403][ T70] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 74.958811][ T70] ? kobject_put (lib/kobject.c:729) [ 74.959096][ T70] print_report (mm/kasan/report.c:489) [ 74.959424][ T70] ? 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) [ 74.959718][ T70] kasan_report (mm/kasan/report.c:603) [ 74.959951][ T70] ? kobject_put (lib/kobject.c:729) [ 74.960215][ T70] kobject_put (lib/kobject.c:729) [ 74.960485][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 74.960879][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 74.961240][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 74.961677][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 74.961960][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 74.962315][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 74.962675][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 74.962950][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 74.963237][ T70] process_one_work (kernel/workqueue.c:2638) [ 74.963533][ T70] ? 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) [ 74.963825][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 74.964149][ T70] ? assign_work (kernel/workqueue.c:1101) [ 74.964416][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 74.964692][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 74.965128][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 74.965487][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 74.965776][ T70] kthread (kernel/kthread.c:388) [ 74.966003][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 74.966272][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 74.966553][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 74.966806][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 74.988326][ T70] ------------[ cut here ]------------ | [ 74.988651][ T70] refcount_t: underflow; use-after-free. | [ 74.989096][ T70] WARNING: CPU: 1 PID: 70 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 74.989640][ T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress bridge stp llc vrf veth [ 74.990972][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 74.991805][ T70] Workqueue: netns cleanup_net [ 74.992085][ T70] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 74.992462][ T70] 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 22 ac 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: 22 ac e8 5e 4c 2b ff and -0xd4b3a2(%rax,%rbp,8),%ch 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 7c 23 a7 ff call 0xffffffffffa723b7 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 [ 74.993673][ T70] RSP: 0018:ffffc9000050fb98 EFLAGS: 00010282 [ 74.994126][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa970e74f [ 74.994634][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 74.995135][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a1f18 [ 74.995551][ T70] R10: ffffc9000050f8c7 R11: 205d303754202020 R12: ffff8880096f2000 [ 74.996070][ T70] R13: ffff8880096f2dd8 R14: ffffc9000050fc98 R15: ffff8880096f2ba0 [ 74.996485][ T70] FS: 0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000 [ 74.996986][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.997328][ T70] CR2: 000055bb1ec73dec CR3: 00000000095e8003 CR4: 00000000001706f0 [ 74.997748][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.998175][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.998597][ T70] Call Trace: [ 74.998773][ T70] [ 74.998929][ T70] ? __warn (kernel/panic.c:677) [ 74.999154][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 74.999504][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 74.999781][ T70] ? vprintk_emit (kernel/printk/printk.c:2313) [ 75.000059][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 75.000293][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 75.000586][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 75.000853][ T70] ? 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) [ 75.001140][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 75.001484][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 75.001827][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 75.002194][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 75.002586][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 75.003032][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 75.003271][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 75.003628][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 75.003915][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 75.004270][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 75.004548][ T70] process_one_work (kernel/workqueue.c:2638) [ 75.004859][ T70] ? 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) [ 75.005215][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 75.005563][ T70] ? assign_work (kernel/workqueue.c:1101) [ 75.005853][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 75.006176][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 75.006575][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 75.006874][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 75.007173][ T70] kthread (kernel/kthread.c:388) [ 75.007414][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 75.007690][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 75.008084][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 75.008368][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 75.011916][ T70] ------------[ cut here ]------------ | [ 75.012214][ T70] sysfs group 'bridge' not found for kobject 'br2' | [ 75.012598][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 75.013655][ T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress bridge stp llc vrf veth [ 75.015018][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 75.015847][ T70] Workqueue: netns cleanup_net [ 75.016209][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 75.016542][ T70] 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 1c ac 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 1c ac mov $0xffffffffac1c99a0,%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 [ 75.017786][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 75.018168][ T70] RAX: 0000000000000000 RBX: ffffffffc06dff00 RCX: ffffffffa970e74f [ 75.018677][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 75.019173][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 75.019767][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880096f2610 [ 75.020290][ T70] R13: ffff8880096f2dd8 R14: ffffc9000050fc98 R15: ffff8880096f2ba0 [ 75.020869][ T70] FS: 0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000 [ 75.021435][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.021816][ T70] CR2: 000055bb1ec73dec CR3: 00000000095e8003 CR4: 00000000001706f0 [ 75.022293][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.022715][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.023200][ T70] Call Trace: [ 75.023402][ T70] [ 75.023592][ T70] ? __warn (kernel/panic.c:677) [ 75.023820][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 75.024115][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 75.024426][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 75.024688][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 75.025039][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 75.025298][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 75.025605][ T70] ? 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) [ 75.025862][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 75.026212][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 75.026562][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 75.026932][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 75.027225][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 75.027546][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 75.027813][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 75.028083][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 75.028390][ T70] process_one_work (kernel/workqueue.c:2638) [ 75.028679][ T70] ? 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) [ 75.028978][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 75.029296][ T70] ? assign_work (kernel/workqueue.c:1101) [ 75.029584][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 75.029918][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 75.030402][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 75.030712][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 75.031067][ T70] kthread (kernel/kthread.c:388) [ 75.031334][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 75.031653][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 75.032066][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 75.032377][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 75.269107][ T70] ------------[ cut here ]------------ | [ 75.269503][ T70] sysfs group 'bridge' not found for kobject 'br2' | [ 75.269956][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 75.270615][ T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress bridge stp llc vrf veth [ 75.271958][ T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 75.272648][ T70] Workqueue: netns cleanup_net [ 75.272906][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 75.273225][ T70] 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 1c ac 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 1c ac mov $0xffffffffac1c99a0,%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 [ 75.274250][ T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282 [ 75.274790][ T70] RAX: 0000000000000000 RBX: ffffffffc06dff00 RCX: ffffffffa970e74f [ 75.275545][ T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 75.276043][ T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19 [ 75.276489][ T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009c2a610 [ 75.276979][ T70] R13: ffff888009c2add8 R14: ffffc9000050fc98 R15: ffff888009c2aba0 [ 75.277459][ T70] FS: 0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000 [ 75.278034][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.278533][ T70] CR2: 000055bb1ec73dec CR3: 00000000095e8003 CR4: 00000000001706f0 [ 75.279215][ T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.279882][ T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.280605][ T70] Call Trace: [ 75.280913][ T70] [ 75.281198][ T70] ? __warn (kernel/panic.c:677) [ 75.281553][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 75.281987][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 75.282414][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) [ 75.282800][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 75.283216][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 75.283699][ T70] ? 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) [ 75.284121][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 75.284563][ T70] br_dev_delete (net/bridge/br_if.c:396) bridge [ 75.285126][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 75.285718][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 75.286154][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 75.286582][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 75.286992][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 75.287364][ T70] ? process_one_work (kernel/workqueue.c:2609) [ 75.287769][ T70] process_one_work (kernel/workqueue.c:2638) [ 75.288240][ T70] ? 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) [ 75.288607][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 75.289052][ T70] ? assign_work (kernel/workqueue.c:1101) [ 75.289423][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 75.289805][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 75.290329][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 75.290740][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 75.291155][ T70] kthread (kernel/kthread.c:388) [ 75.291480][ T70] ? __pfx_kthread (kernel/kthread.c:341) [ 75.291795][ T70] ret_from_fork (arch/x86/kernel/process.c:153) [ 75.292040][ T70] ? __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