[ 21.415307][ T276] ip (276) used greatest stack depth: 23696 bytes left [ 31.189418][ T332] Initializing XFRM netlink socket [ 1000.137883][ T69] ================================================================== [ 1000.138295][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 1000.138643][ T69] Read of size 1 at addr ffff8880096016c4 by task kworker/u16:1/69 [ 1000.138901][ T69] [ 1000.139012][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 1000.139021][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1000.139024][ T69] Workqueue: netns cleanup_net [ 1000.139038][ T69] Call Trace: [ 1000.139040][ T69] [ 1000.139044][ T69] dump_stack_lvl+0x82/0xc0 [ 1000.139050][ T69] print_address_description.constprop.0+0x2c/0x3a0 [ 1000.139064][ T69] ? kobject_put+0xbb/0xd0 [ 1000.139068][ T69] print_report+0xb4/0x270 [ 1000.139072][ T69] ? kobject_put+0xbb/0xd0 [ 1000.139075][ T69] ? kasan_addr_to_slab+0x21/0x70 [ 1000.139078][ T69] ? kobject_put+0xbb/0xd0 [ 1000.139081][ T69] kasan_report+0xca/0x100 [ 1000.139085][ T69] ? kobject_put+0xbb/0xd0 [ 1000.139091][ T69] kobject_put+0xbb/0xd0 [ 1000.139094][ T69] netdev_run_todo+0x5f0/0xc60 [ 1000.139101][ T69] ? dev_ingress_queue_create+0x190/0x190 [ 1000.139105][ T69] ? generic_xdp_install+0x410/0x410 [ 1000.139108][ T69] ? net_generic+0xb1/0x1f0 [ 1000.139117][ T69] ops_undo_list+0x714/0x890 [ 1000.139123][ T69] ? rtnl_net_dumpid_one+0x270/0x270 [ 1000.139127][ T69] ? cleanup_net+0x2d6/0x8b0 [ 1000.139133][ T69] cleanup_net+0x3b2/0x8b0 [ 1000.139137][ T69] ? net_passive_dec+0x190/0x190 [ 1000.139142][ T69] ? rcu_is_watching+0x12/0xb0 [ 1000.139154][ T69] process_one_work+0xe35/0x1650 [ 1000.139167][ T69] ? pwq_dec_nr_in_flight+0x550/0x550 [ 1000.139173][ T69] ? assign_work+0x168/0x240 [ 1000.139178][ T69] worker_thread+0x591/0xcf0 [ 1000.139183][ T69] ? rescuer_thread+0xd10/0xd10 [ 1000.139187][ T69] kthread+0x37b/0x5f0 [ 1000.139191][ T69] ? kthread_is_per_cpu+0xc0/0xc0 [ 1000.139194][ T69] ? ret_from_fork+0x1b/0x270 [ 1000.139203][ T69] ? __lock_release+0x5d/0x170 [ 1000.139211][ T69] ? rcu_is_watching+0x12/0xb0 [ 1000.139215][ T69] ? kthread_is_per_cpu+0xc0/0xc0 [ 1000.139221][ T69] ret_from_fork+0x1db/0x270 [ 1000.139224][ T69] ? kthread_is_per_cpu+0xc0/0xc0 [ 1000.139229][ T69] ret_from_fork_asm+0x11/0x20 [ 1000.139246][ T69] [ 1000.139247][ T69] [ 1000.149161][ T69] Allocated by task 265: [ 1000.149393][ T69] kasan_save_stack+0x24/0x40 [ 1000.149723][ T69] kasan_save_track+0x14/0x30 [ 1000.150024][ T69] __kasan_kmalloc+0x7b/0x90 [ 1000.150294][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 1000.150593][ T69] alloc_netdev_mqs+0x7d/0x1370 [ 1000.150861][ T69] ip6_tnl_init_net+0x102/0x3f0 [ 1000.151130][ T69] ops_init+0x189/0x550 [ 1000.151327][ T69] setup_net+0xf1/0x380 [ 1000.151465][ T69] copy_net_ns+0x253/0x510 [ 1000.151634][ T69] create_new_namespaces+0x35f/0x900 [ 1000.151804][ T69] unshare_nsproxy_namespaces+0x8a/0x1a0 [ 1000.151980][ T69] ksys_unshare+0x2be/0x6e0 [ 1000.152197][ T69] __x64_sys_unshare+0x31/0x40 [ 1000.152444][ T69] do_syscall_64+0xc1/0xfd0 [ 1000.152659][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1000.152857][ T69] [ 1000.152954][ T69] Freed by task 69: [ 1000.153086][ T69] kasan_save_stack+0x24/0x40 [ 1000.153267][ T69] kasan_save_track+0x14/0x30 [ 1000.153489][ T69] __kasan_save_free_info+0x3b/0x60 [ 1000.153699][ T69] __kasan_slab_free+0x3f/0x60 [ 1000.153915][ T69] kfree+0x21d/0x540 [ 1000.154156][ T69] device_release+0x9c/0x210 [ 1000.154370][ T69] kobject_cleanup+0xfe/0x360 [ 1000.154575][ T69] netdev_run_todo+0x81f/0xc60 [ 1000.154763][ T69] ops_undo_list+0x714/0x890 [ 1000.154937][ T69] cleanup_net+0x3b2/0x8b0 [ 1000.155122][ T69] process_one_work+0xe35/0x1650 [ 1000.155343][ T69] worker_thread+0x591/0xcf0 [ 1000.155518][ T69] kthread+0x37b/0x5f0 [ 1000.155665][ T69] ret_from_fork+0x1db/0x270 [ 1000.155840][ T69] ret_from_fork_asm+0x11/0x20 [ 1000.156046][ T69] [ 1000.156135][ T69] The buggy address belongs to the object at ffff888009601000 [ 1000.156135][ T69] which belongs to the cache kmalloc-4k of size 4096 [ 1000.156572][ T69] The buggy address is located 1732 bytes inside of [ 1000.156572][ T69] freed 4096-byte region [ffff888009601000, ffff888009602000) [ 1000.156997][ T69] [ 1000.157094][ T69] The buggy address belongs to the physical page: [ 1000.157316][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9600 [ 1000.157639][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 1000.157911][ T69] flags: 0x80000000000040(head|node=0|zone=1) [ 1000.158144][ T69] page_type: f5(slab) [ 1000.158288][ T69] raw: 0080000000000040 ffff888001043700 ffffea0000215c10 ffffea000021de10 [ 1000.158615][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 1000.158934][ T69] head: 0080000000000040 ffff888001043700 ffffea0000215c10 ffffea000021de10 [ 1000.159290][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 1000.159623][ T69] head: 0080000000000003 ffffea0000258001 00000000ffffffff 00000000ffffffff [ 1000.159941][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 1000.160296][ T69] page dumped because: kasan: bad access detected [ 1000.160538][ T69] [ 1000.160643][ T69] Memory state around the buggy address: [ 1000.160835][ T69] ffff888009601580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1000.161084][ T69] ffff888009601600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1000.161352][ T69] >ffff888009601680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1000.161614][ T69] ^ [ 1000.161838][ T69] ffff888009601700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1000.162083][ T69] ffff888009601780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1000.162338][ T69] ================================================================== [ 1000.162680][ T69] Disabling lock debugging due to kernel taint [ 1000.163161][ T69] ------------[ cut here ]------------ [ 1000.163552][ T69] refcount_t: underflow; use-after-free. [ 1000.163895][ T69] WARNING: CPU: 0 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 1000.164446][ T69] Modules linked in: xfrm_user xt_policy nft_compat nf_tables [ 1000.164899][ T69] CPU: 0 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 1000.165577][ T69] Tainted: [B]=BAD_PAGE [ 1000.165796][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1000.166169][ T69] Workqueue: netns cleanup_net [ 1000.166497][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 1000.166880][ T69] 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 85 9a 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 [ 1000.167861][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282 [ 1000.168225][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 1000.168510][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 1000.168789][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3700934 [ 1000.169051][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001 [ 1000.169342][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 1000.169609][ T69] FS: 0000000000000000(0000) GS:ffff8880d0308000(0000) knlGS:0000000000000000 [ 1000.169929][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1000.170153][ T69] CR2: 0000556b98d0e0f0 CR3: 0000000067b49003 CR4: 0000000000772ef0 [ 1000.170446][ T69] PKRU: 55555554 [ 1000.170587][ T69] Call Trace: [ 1000.170729][ T69] [ 1000.170829][ T69] netdev_run_todo+0x5f0/0xc60 [ 1000.171070][ T69] ? dev_ingress_queue_create+0x190/0x190 [ 1000.171394][ T69] ? generic_xdp_install+0x410/0x410 [ 1000.171591][ T69] ? net_generic+0xb1/0x1f0 [ 1000.171790][ T69] ops_undo_list+0x714/0x890 [ 1000.172077][ T69] ? rtnl_net_dumpid_one+0x270/0x270 [ 1000.172289][ T69] ? cleanup_net+0x2d6/0x8b0 [ 1000.172495][ T69] cleanup_net+0x3b2/0x8b0 [ 1000.172675][ T69] ? net_passive_dec+0x190/0x190 [ 1000.172939][ T69] ? rcu_is_watching+0x12/0xb0 [ 1000.173138][ T69] process_one_work+0xe35/0x1650 [ 1000.173364][ T69] ? pwq_dec_nr_in_flight+0x550/0x550 [ 1000.173544][ T69] ? assign_work+0x168/0x240 [ 1000.173730][ T69] worker_thread+0x591/0xcf0 [ 1000.173920][ T69] ? rescuer_thread+0xd10/0xd10 [ 1000.174135][ T69] kthread+0x37b/0x5f0 [ 1000.174305][ T69] ? kthread_is_per_cpu+0xc0/0xc0 [ 1000.174490][ T69] ? ret_from_fork+0x1b/0x270 [ 1000.174682][ T69] ? __lock_release+0x5d/0x170 [ 1000.174859][ T69] ? rcu_is_watching+0x12/0xb0 [ 1000.175146][ T69] ? kthread_is_per_cpu+0xc0/0xc0 [ 1000.175453][ T69] ret_from_fork+0x1db/0x270 [ 1000.175636][ T69] ? kthread_is_per_cpu+0xc0/0xc0 [ 1000.175823][ T69] ret_from_fork_asm+0x11/0x20 [ 1000.176026][ T69] [ 1000.176171][ T69] irq event stamp: 19479 [ 1000.176342][ T69] hardirqs last enabled at (19479): [] finish_task_switch.isra.0+0x245/0x960 [ 1000.176807][ T69] hardirqs last disabled at (19478): [] __schedule+0x94a/0x1b10 [ 1000.177219][ T69] softirqs last enabled at (19142): [] handle_softirqs+0x352/0x610 [ 1000.177550][ T69] softirqs last disabled at (17981): [] irq_exit_rcu+0xab/0x100 [ 1000.177871][ T69] ---[ end trace 0000000000000000 ]---