[ 28.987816][ T541] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.989244][ T559] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.989737][ T550] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.990788][ T561] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.992141][ T545] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.993179][ T552] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.993703][ T569] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.994875][ T568] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.995714][ T558] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 28.997728][ T555] nf_conntrack: nf_conntrack: table full in netns 4026532049, dropping packet
[ 118.187328][ T12] ==================================================================
[ 118.187625][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 118.187887][ T12] Read of size 1 at addr ffff8880097246ac by task kworker/u16:0/12
[ 118.188142][ T12]
[ 118.188236][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 118.188241][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 118.188243][ T12] Workqueue: netns cleanup_net
[ 118.188249][ T12] Call Trace:
[ 118.188251][ T12]
[ 118.188253][ T12] dump_stack_lvl+0x82/0xc0
[ 118.188259][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 118.188265][ T12] ? kobject_put+0xbb/0xd0
[ 118.188269][ T12] print_report+0xb4/0x270
[ 118.188273][ T12] ? kobject_put+0xbb/0xd0
[ 118.188276][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 118.188280][ T12] ? kobject_put+0xbb/0xd0
[ 118.188283][ T12] kasan_report+0xca/0x100
[ 118.188288][ T12] ? kobject_put+0xbb/0xd0
[ 118.188293][ T12] kobject_put+0xbb/0xd0
[ 118.188297][ T12] netdev_run_todo+0x5f0/0xc60
[ 118.188302][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 118.188306][ T12] ? generic_xdp_install+0x410/0x410
[ 118.188313][ T12] ops_undo_list+0x714/0x890
[ 118.188320][ T12] ? netns_get+0x110/0x110
[ 118.188323][ T12] ? cleanup_net+0x2d6/0x830
[ 118.188327][ T12] cleanup_net+0x3b2/0x830
[ 118.188331][ T12] ? net_passive_dec+0x190/0x190
[ 118.188334][ T12] ? rcu_is_watching+0x12/0xb0
[ 118.188340][ T12] process_one_work+0xe35/0x1650
[ 118.188348][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 118.188353][ T12] ? assign_work+0x168/0x240
[ 118.188357][ T12] worker_thread+0x591/0xcf0
[ 118.188363][ T12] ? rescuer_thread+0xd10/0xd10
[ 118.188366][ T12] kthread+0x37b/0x5f0
[ 118.188370][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 118.188372][ T12] ? ret_from_fork+0x1b/0x270
[ 118.188378][ T12] ? __lock_release+0x5d/0x170
[ 118.188383][ T12] ? rcu_is_watching+0x12/0xb0
[ 118.188386][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 118.188390][ T12] ret_from_fork+0x1db/0x270
[ 118.188393][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 118.188395][ T12] ret_from_fork_asm+0x11/0x20
[ 118.188404][ T12]
[ 118.188405][ T12]
[ 118.194846][ T12] Allocated by task 263:
[ 118.194978][ T12] kasan_save_stack+0x24/0x40
[ 118.195155][ T12] kasan_save_track+0x14/0x30
[ 118.195329][ T12] __kasan_kmalloc+0x7b/0x90
[ 118.195499][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 118.195674][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 118.195846][ T12] sit_init_net+0x169/0x550
[ 118.196018][ T12] ops_init+0x189/0x550
[ 118.196149][ T12] setup_net+0xf1/0x380
[ 118.196278][ T12] copy_net_ns+0x21a/0x380
[ 118.196447][ T12] create_new_namespaces+0x35f/0x900
[ 118.196620][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 118.196789][ T12] ksys_unshare+0x2a3/0x660
[ 118.196961][ T12] __x64_sys_unshare+0x31/0x40
[ 118.197145][ T12] do_syscall_64+0xc1/0xfd0
[ 118.197322][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 118.197541][ T12]
[ 118.197627][ T12] Freed by task 12:
[ 118.197751][ T12] kasan_save_stack+0x24/0x40
[ 118.197923][ T12] kasan_save_track+0x14/0x30
[ 118.198090][ T12] __kasan_save_free_info+0x3b/0x60
[ 118.198265][ T12] __kasan_slab_free+0x3f/0x60
[ 118.198434][ T12] kfree+0x21d/0x540
[ 118.198564][ T12] device_release+0x9c/0x210
[ 118.198738][ T12] kobject_cleanup+0xfe/0x360
[ 118.198910][ T12] netdev_run_todo+0x81f/0xc60
[ 118.199077][ T12] ops_undo_list+0x714/0x890
[ 118.199250][ T12] cleanup_net+0x3b2/0x830
[ 118.199417][ T12] process_one_work+0xe35/0x1650
[ 118.199591][ T12] worker_thread+0x591/0xcf0
[ 118.199761][ T12] kthread+0x37b/0x5f0
[ 118.199889][ T12] ret_from_fork+0x1db/0x270
[ 118.200064][ T12] ret_from_fork_asm+0x11/0x20
[ 118.200236][ T12]
[ 118.200324][ T12] The buggy address belongs to the object at ffff888009724000
[ 118.200324][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 118.200730][ T12] The buggy address is located 1708 bytes inside of
[ 118.200730][ T12] freed 4096-byte region [ffff888009724000, ffff888009725000)
[ 118.201145][ T12]
[ 118.201231][ T12] The buggy address belongs to the physical page:
[ 118.201438][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9720
[ 118.201739][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 118.201993][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 118.202303][ T12] page_type: f5(slab)
[ 118.202443][ T12] raw: 0080000000000040 ffff888001043700 ffffea00002f5c10 ffffea00002a3c10
[ 118.202744][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 118.203138][ T12] head: 0080000000000040 ffff888001043700 ffffea00002f5c10 ffffea00002a3c10
[ 118.203436][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 118.203831][ T12] head: 0080000000000003 ffffea000025c801 00000000ffffffff 00000000ffffffff
[ 118.204135][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 118.204429][ T12] page dumped because: kasan: bad access detected
[ 118.204722][ T12]
[ 118.204805][ T12] Memory state around the buggy address:
[ 118.204967][ T12] ffff888009724580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 118.205306][ T12] ffff888009724600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 118.205554][ T12] >ffff888009724680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 118.205798][ T12] ^
[ 118.206044][ T12] ffff888009724700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 118.206295][ T12] ffff888009724780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 118.206536][ T12] ==================================================================
[ 118.206911][ T12] Disabling lock debugging due to kernel taint
[ 118.207206][ T12] ------------[ cut here ]------------
[ 118.207381][ T12] refcount_t: underflow; use-after-free.
[ 118.207591][ T12] WARNING: CPU: 2 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 118.207900][ T12] Modules linked in: nf_conntrack_netlink nft_ct nf_tables nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
[ 118.208340][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 118.208724][ T12] Tainted: [B]=BAD_PAGE
[ 118.208865][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 118.209089][ T12] Workqueue: netns cleanup_net
[ 118.209293][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 118.209515][ T12] Code: 83 90 02 80 fb 01 0f 87 95 6b d6 fe 83 e3 01 0f 85 51 ff ff ff c6 05 b1 83 90 02 01 90 48 c7 c7 a0 de 85 9b e8 c2 8b 15 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 f0 34 a1 ff e9 ba fe ff ff
[ 118.210092][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 118.210321][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 118.210578][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 118.210837][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff383e220
[ 118.211093][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 118.211366][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 118.211623][ T12] FS: 0000000000000000(0000) GS:ffff888098cec000(0000) knlGS:0000000000000000
[ 118.211910][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 118.212145][ T12] CR2: 000055d47b5740f0 CR3: 0000000033335001 CR4: 0000000000772ef0
[ 118.212420][ T12] PKRU: 55555554
[ 118.212563][ T12] Call Trace:
[ 118.212705][ T12]
[ 118.212811][ T12] netdev_run_todo+0x5f0/0xc60
[ 118.212995][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 118.213193][ T12] ? generic_xdp_install+0x410/0x410
[ 118.213374][ T12] ops_undo_list+0x714/0x890
[ 118.213550][ T12] ? netns_get+0x110/0x110
[ 118.213734][ T12] ? cleanup_net+0x2d6/0x830
[ 118.213907][ T12] cleanup_net+0x3b2/0x830
[ 118.214184][ T12] ? net_passive_dec+0x190/0x190
[ 118.214363][ T12] ? rcu_is_watching+0x12/0xb0
[ 118.214537][ T12] process_one_work+0xe35/0x1650
[ 118.214718][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 118.214893][ T12] ? assign_work+0x168/0x240
[ 118.215064][ T12] worker_thread+0x591/0xcf0
[ 118.215256][ T12] ? rescuer_thread+0xd10/0xd10
[ 118.215431][ T12] kthread+0x37b/0x5f0
[ 118.215572][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 118.215743][ T12] ? ret_from_fork+0x1b/0x270
[ 118.215919][ T12] ? __lock_release+0x5d/0x170
[ 118.216095][ T12] ? rcu_is_watching+0x12/0xb0
[ 118.216282][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 118.216546][ T12] ret_from_fork+0x1db/0x270
[ 118.216727][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 118.216900][ T12] ret_from_fork_asm+0x11/0x20
[ 118.217090][ T12]
[ 118.217331][ T12] irq event stamp: 9243
[ 118.217472][ T12] hardirqs last enabled at (9243): [] finish_task_switch.isra.0+0x245/0x960
[ 118.217799][ T12] hardirqs last disabled at (9242): [] __schedule+0x94a/0x1b10
[ 118.218090][ T12] softirqs last enabled at (9162): [] handle_softirqs+0x352/0x610
[ 118.218480][ T12] softirqs last disabled at (9155): [] irq_exit_rcu+0xab/0x100
[ 118.218769][ T12] ---[ end trace 0000000000000000 ]---