[ 30.170099][ T615] sctp: Hash tables configured (bind 32/56)
[ 31.103525][ T12] ==================================================================
[ 31.103805][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 31.104045][ T12] Read of size 1 at addr ffff888008b946c4 by task kworker/u16:0/12
[ 31.104275][ T12]
[ 31.104361][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 31.104366][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 31.104368][ T12] Workqueue: netns cleanup_net
[ 31.104377][ T12] Call Trace:
[ 31.104379][ T12]
[ 31.104381][ T12] dump_stack_lvl+0x82/0xc0
[ 31.104387][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 31.104394][ T12] ? kobject_put+0xbb/0xd0
[ 31.104398][ T12] print_report+0xb4/0x270
[ 31.104402][ T12] ? kobject_put+0xbb/0xd0
[ 31.104405][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 31.104409][ T12] ? kobject_put+0xbb/0xd0
[ 31.104412][ T12] kasan_report+0xca/0x100
[ 31.104416][ T12] ? kobject_put+0xbb/0xd0
[ 31.104421][ T12] kobject_put+0xbb/0xd0
[ 31.104425][ T12] netdev_run_todo+0x5f0/0xc60
[ 31.104431][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 31.104434][ T12] ? generic_xdp_install+0x410/0x410
[ 31.104437][ T12] ? net_generic+0xb1/0x1f0
[ 31.104446][ T12] ops_undo_list+0x714/0x890
[ 31.104452][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 31.104455][ T12] ? cleanup_net+0x2d6/0x8b0
[ 31.104461][ T12] cleanup_net+0x3b2/0x8b0
[ 31.104465][ T12] ? net_passive_dec+0x190/0x190
[ 31.104470][ T12] ? rcu_is_watching+0x12/0xb0
[ 31.104477][ T12] process_one_work+0xe35/0x1650
[ 31.104485][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 31.104491][ T12] ? assign_work+0x168/0x240
[ 31.104495][ T12] worker_thread+0x591/0xcf0
[ 31.104501][ T12] ? rescuer_thread+0xd10/0xd10
[ 31.104505][ T12] kthread+0x37b/0x5f0
[ 31.104509][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 31.104512][ T12] ? ret_from_fork+0x1b/0x270
[ 31.104516][ T12] ? __lock_release+0x5d/0x170
[ 31.104520][ T12] ? rcu_is_watching+0x12/0xb0
[ 31.104524][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 31.104528][ T12] ret_from_fork+0x1db/0x270
[ 31.104530][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 31.104533][ T12] ret_from_fork_asm+0x11/0x20
[ 31.104543][ T12]
[ 31.104544][ T12]
[ 31.110679][ T12] Allocated by task 583:
[ 31.110800][ T12] kasan_save_stack+0x24/0x40
[ 31.110967][ T12] kasan_save_track+0x14/0x30
[ 31.111127][ T12] __kasan_kmalloc+0x7b/0x90
[ 31.111283][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 31.111456][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 31.111616][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 31.111781][ T12] ops_init+0x189/0x550
[ 31.111902][ T12] setup_net+0xf1/0x380
[ 31.112026][ T12] copy_net_ns+0x253/0x510
[ 31.112184][ T12] create_new_namespaces+0x35f/0x900
[ 31.112345][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 31.112506][ T12] ksys_unshare+0x2be/0x6e0
[ 31.112664][ T12] __x64_sys_unshare+0x31/0x40
[ 31.112824][ T12] do_syscall_64+0xc1/0xfd0
[ 31.112984][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 31.113182][ T12]
[ 31.113261][ T12] Freed by task 12:
[ 31.113376][ T12] kasan_save_stack+0x24/0x40
[ 31.113534][ T12] kasan_save_track+0x14/0x30
[ 31.113691][ T12] __kasan_save_free_info+0x3b/0x60
[ 31.113851][ T12] __kasan_slab_free+0x3f/0x60
[ 31.114007][ T12] kfree+0x21d/0x540
[ 31.114131][ T12] device_release+0x9c/0x210
[ 31.114290][ T12] kobject_cleanup+0xfe/0x360
[ 31.114454][ T12] netdev_run_todo+0x81f/0xc60
[ 31.114606][ T12] ops_undo_list+0x714/0x890
[ 31.114767][ T12] cleanup_net+0x3b2/0x8b0
[ 31.114919][ T12] process_one_work+0xe35/0x1650
[ 31.115087][ T12] worker_thread+0x591/0xcf0
[ 31.115240][ T12] kthread+0x37b/0x5f0
[ 31.115365][ T12] ret_from_fork+0x1db/0x270
[ 31.115527][ T12] ret_from_fork_asm+0x11/0x20
[ 31.115681][ T12]
[ 31.115765][ T12] The buggy address belongs to the object at ffff888008b94000
[ 31.115765][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 31.116146][ T12] The buggy address is located 1732 bytes inside of
[ 31.116146][ T12] freed 4096-byte region [ffff888008b94000, ffff888008b95000)
[ 31.116533][ T12]
[ 31.116614][ T12] The buggy address belongs to the physical page:
[ 31.116807][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8b90
[ 31.117163][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 31.117423][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 31.117657][ T12] page_type: f5(slab)
[ 31.117790][ T12] raw: 0080000000000040 ffff888001043700 ffffea00001e8e10 ffffea000022e810
[ 31.118094][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 31.118395][ T12] head: 0080000000000040 ffff888001043700 ffffea00001e8e10 ffffea000022e810
[ 31.118703][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 31.119004][ T12] head: 0080000000000003 ffffea000022e401 00000000ffffffff 00000000ffffffff
[ 31.119313][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 31.119614][ T12] page dumped because: kasan: bad access detected
[ 31.119821][ T12]
[ 31.119909][ T12] Memory state around the buggy address:
[ 31.120070][ T12] ffff888008b94580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 31.120316][ T12] ffff888008b94600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 31.120564][ T12] >ffff888008b94680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 31.120807][ T12] ^
[ 31.121015][ T12] ffff888008b94700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 31.121252][ T12] ffff888008b94780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 31.121498][ T12] ==================================================================
[ 31.121861][ T12] Disabling lock debugging due to kernel taint
[ 31.122274][ T12] ------------[ cut here ]------------
[ 31.122517][ T12] refcount_t: underflow; use-after-free.
[ 31.122806][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 31.123464][ T12] Modules linked in: sctp
[ 31.123690][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 31.124459][ T12] Tainted: [B]=BAD_PAGE
[ 31.124666][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 31.125133][ T12] Workqueue: netns cleanup_net
[ 31.125425][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 31.125752][ T12] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba 05 9d e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
[ 31.126749][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 31.127101][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 31.127520][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 31.127897][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3c00934
[ 31.128284][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 31.128660][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 31.129053][ T12] FS: 0000000000000000(0000) GS:ffff8880cdb88000(0000) knlGS:0000000000000000
[ 31.129495][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 31.129818][ T12] CR2: 00007f43f4a52840 CR3: 0000000039749003 CR4: 0000000000772ef0
[ 31.130205][ T12] PKRU: 55555554
[ 31.130398][ T12] Call Trace:
[ 31.130590][ T12]
[ 31.130729][ T12] netdev_run_todo+0x5f0/0xc60
[ 31.131002][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 31.131263][ T12] ? generic_xdp_install+0x410/0x410
[ 31.131514][ T12] ? net_generic+0xb1/0x1f0
[ 31.131771][ T12] ops_undo_list+0x714/0x890
[ 31.132034][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 31.132286][ T12] ? cleanup_net+0x2d6/0x8b0
[ 31.132544][ T12] cleanup_net+0x3b2/0x8b0
[ 31.132808][ T12] ? net_passive_dec+0x190/0x190
[ 31.133072][ T12] ? rcu_is_watching+0x12/0xb0
[ 31.133329][ T12] process_one_work+0xe35/0x1650
[ 31.133587][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 31.133841][ T12] ? assign_work+0x168/0x240
[ 31.134103][ T12] worker_thread+0x591/0xcf0
[ 31.134366][ T12] ? rescuer_thread+0xd10/0xd10
[ 31.134616][ T12] kthread+0x37b/0x5f0
[ 31.134820][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 31.135085][ T12] ? ret_from_fork+0x1b/0x270
[ 31.135330][ T12] ? __lock_release+0x5d/0x170
[ 31.135585][ T12] ? rcu_is_watching+0x12/0xb0
[ 31.135839][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 31.136101][ T12] ret_from_fork+0x1db/0x270
[ 31.136355][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 31.136604][ T12] ret_from_fork_asm+0x11/0x20
[ 31.136867][ T12]
[ 31.137071][ T12] irq event stamp: 11549
[ 31.137263][ T12] hardirqs last enabled at (11549): [] finish_task_switch.isra.0+0x245/0x960
[ 31.137828][ T12] hardirqs last disabled at (11548): [] __schedule+0x94a/0x1b10
[ 31.138276][ T12] softirqs last enabled at (11456): [] handle_softirqs+0x352/0x610
[ 31.138716][ T12] softirqs last disabled at (11059): [] irq_exit_rcu+0xab/0x100
[ 31.139162][ T12] ---[ end trace 0000000000000000 ]---
[ 31.205238][ T537] make (537) used greatest stack depth: 24128 bytes left