[ 16.740695][ T12] ==================================================================
[ 16.741100][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 16.741391][ T12] Read of size 1 at addr ffff8880080a4694 by task kworker/u16:0/12
[ 16.741686][ T12]
[ 16.741784][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.741791][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.741794][ T12] Workqueue: netns cleanup_net
[ 16.741807][ T12] Call Trace:
[ 16.741811][ T12]
[ 16.741813][ T12] dump_stack_lvl+0x82/0xc0
[ 16.741822][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 16.741840][ T12] ? kobject_put+0xbb/0xd0
[ 16.741843][ T12] print_report+0xb4/0x270
[ 16.741847][ T12] ? kobject_put+0xbb/0xd0
[ 16.741850][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 16.741854][ T12] ? kobject_put+0xbb/0xd0
[ 16.741856][ T12] kasan_report+0xca/0x100
[ 16.741868][ T12] ? kobject_put+0xbb/0xd0
[ 16.741873][ T12] kobject_put+0xbb/0xd0
[ 16.741876][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.741884][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.741887][ T12] ? generic_xdp_install+0x410/0x410
[ 16.741894][ T12] ops_undo_list+0x714/0x890
[ 16.741898][ T12] ? netns_get+0x110/0x110
[ 16.741900][ T12] ? cleanup_net+0x2d6/0x830
[ 16.741905][ T12] cleanup_net+0x3b2/0x830
[ 16.741909][ T12] ? net_passive_dec+0x190/0x190
[ 16.741914][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.741925][ T12] process_one_work+0xe35/0x1650
[ 16.741938][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.741944][ T12] ? assign_work+0x168/0x240
[ 16.741947][ T12] worker_thread+0x591/0xcf0
[ 16.741953][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.741959][ T12] kthread+0x37b/0x5f0
[ 16.741964][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.741966][ T12] ? ret_from_fork+0x1b/0x270
[ 16.741979][ T12] ? __lock_release+0x5d/0x170
[ 16.741987][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.741990][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.741995][ T12] ret_from_fork+0x1db/0x270
[ 16.741998][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.742000][ T12] ret_from_fork_asm+0x11/0x20
[ 16.742012][ T12]
[ 16.742013][ T12]
[ 16.749032][ T12] Allocated by task 228:
[ 16.749185][ T12] kasan_save_stack+0x24/0x40
[ 16.749480][ T12] kasan_save_track+0x14/0x30
[ 16.749669][ T12] __kasan_kmalloc+0x7b/0x90
[ 16.749853][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 16.750045][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 16.750231][ T12] sit_init_net+0x169/0x550
[ 16.750428][ T12] ops_init+0x189/0x550
[ 16.750568][ T12] setup_net+0xf1/0x380
[ 16.750707][ T12] copy_net_ns+0x21a/0x380
[ 16.750904][ T12] create_new_namespaces+0x35f/0x900
[ 16.751114][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 16.751308][ T12] ksys_unshare+0x2a3/0x660
[ 16.751503][ T12] __x64_sys_unshare+0x31/0x40
[ 16.751685][ T12] do_syscall_64+0xc1/0xfd0
[ 16.751967][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.752228][ T12]
[ 16.752348][ T12] Freed by task 12:
[ 16.752494][ T12] kasan_save_stack+0x24/0x40
[ 16.752783][ T12] kasan_save_track+0x14/0x30
[ 16.752973][ T12] __kasan_save_free_info+0x3b/0x60
[ 16.753177][ T12] __kasan_slab_free+0x3f/0x60
[ 16.753380][ T12] kfree+0x21d/0x540
[ 16.753526][ T12] device_release+0x9c/0x210
[ 16.753825][ T12] kobject_cleanup+0xfe/0x360
[ 16.754015][ T12] netdev_run_todo+0x81f/0xc60
[ 16.754203][ T12] ops_undo_list+0x714/0x890
[ 16.754374][ T12] cleanup_net+0x3b2/0x830
[ 16.754636][ T12] process_one_work+0xe35/0x1650
[ 16.754806][ T12] worker_thread+0x591/0xcf0
[ 16.755020][ T12] kthread+0x37b/0x5f0
[ 16.755155][ T12] ret_from_fork+0x1db/0x270
[ 16.755493][ T12] ret_from_fork_asm+0x11/0x20
[ 16.755667][ T12]
[ 16.755752][ T12] The buggy address belongs to the object at ffff8880080a4000
[ 16.755752][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 16.756179][ T12] The buggy address is located 1684 bytes inside of
[ 16.756179][ T12] freed 4096-byte region [ffff8880080a4000, ffff8880080a5000)
[ 16.756664][ T12]
[ 16.756765][ T12] The buggy address belongs to the physical page:
[ 16.757019][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x80a0
[ 16.757344][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 16.757682][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 16.757897][ T12] page_type: f5(slab)
[ 16.758052][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000131210 ffffea0000208c10
[ 16.758365][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.758672][ T12] head: 0080000000000040 ffff888001043700 ffffea0000131210 ffffea0000208c10
[ 16.758965][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.759295][ T12] head: 0080000000000003 ffffea0000202801 00000000ffffffff 00000000ffffffff
[ 16.759580][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 16.759969][ T12] page dumped because: kasan: bad access detected
[ 16.760182][ T12]
[ 16.760270][ T12] Memory state around the buggy address:
[ 16.760437][ T12] ffff8880080a4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.760772][ T12] ffff8880080a4600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.761000][ T12] >ffff8880080a4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.761268][ T12] ^
[ 16.761561][ T12] ffff8880080a4700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.761791][ T12] ffff8880080a4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.762101][ T12] ==================================================================
[ 16.762505][ T12] Disabling lock debugging due to kernel taint
[ 16.762814][ T12] ------------[ cut here ]------------
[ 16.763008][ T12] refcount_t: underflow; use-after-free.
[ 16.763495][ T12] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.763861][ T12] Modules linked in: veth
[ 16.764063][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.764526][ T12] Tainted: [B]=BAD_PAGE
[ 16.764689][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.764970][ T12] Workqueue: netns cleanup_net
[ 16.765193][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.765471][ T12] Code: 48 92 02 80 fb 01 0f 87 cb 7d d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 75 48 92 02 01 90 48 c7 c7 a0 8d a5 bc e8 42 93 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 37 a1 ff e9 ba fe ff ff
[ 16.766462][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 16.766842][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.767294][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.767712][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff7a7e134
[ 16.768147][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 16.768629][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.768912][ T12] FS: 0000000000000000(0000) GS:ffff888077b90000(0000) knlGS:0000000000000000
[ 16.769253][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.769536][ T12] CR2: 00007f4ae15e4100 CR3: 000000000ba6a005 CR4: 0000000000772ef0
[ 16.769875][ T12] PKRU: 55555554
[ 16.770010][ T12] Call Trace:
[ 16.770153][ T12]
[ 16.770259][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.770552][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.770784][ T12] ? generic_xdp_install+0x410/0x410
[ 16.770985][ T12] ops_undo_list+0x714/0x890
[ 16.771179][ T12] ? netns_get+0x110/0x110
[ 16.771482][ T12] ? cleanup_net+0x2d6/0x830
[ 16.771669][ T12] cleanup_net+0x3b2/0x830
[ 16.771846][ T12] ? net_passive_dec+0x190/0x190
[ 16.772112][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.772410][ T12] process_one_work+0xe35/0x1650
[ 16.772701][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.772987][ T12] ? assign_work+0x168/0x240
[ 16.773285][ T12] worker_thread+0x591/0xcf0
[ 16.773752][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.774047][ T12] kthread+0x37b/0x5f0
[ 16.774286][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.774575][ T12] ? ret_from_fork+0x1b/0x270
[ 16.775205][ T12] ? __lock_release+0x5d/0x170
[ 16.775482][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.775712][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.775900][ T12] ret_from_fork+0x1db/0x270
[ 16.776122][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.776408][ T12] ret_from_fork_asm+0x11/0x20
[ 16.776588][ T12]
[ 16.776735][ T12] irq event stamp: 3045
[ 16.776896][ T12] hardirqs last enabled at (3045): [] finish_task_switch.isra.0+0x245/0x960
[ 16.777401][ T12] hardirqs last disabled at (3044): [] __schedule+0x94a/0x1b10
[ 16.777768][ T12] softirqs last enabled at (2808): [] handle_softirqs+0x352/0x610
[ 16.778204][ T12] softirqs last disabled at (2607): [] irq_exit_rcu+0xab/0x100
[ 16.778545][ T12] ---[ end trace 0000000000000000 ]---
[ 17.206249][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.219735][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.220948][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.242270][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.244378][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.267264][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.269527][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 21.290275][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 21.292480][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 22.314214][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 22.316304][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 23.339293][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK