[ 2.341324] ip (257) used greatest stack depth: 12072 bytes left [ 3.165869] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.165990] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166088] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166165] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166279] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166355] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166662] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166772] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.166866] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 3.167023] nf_conntrack: nf_conntrack: table full in netns 4026532044, dropping packet [ 40.441869] ------------[ cut here ]------------ [ 40.441969] refcount_t: underflow; use-after-free. [ 40.442034] WARNING: CPU: 0 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 40.442147] Modules linked in: nf_conntrack_netlink nft_ct nf_tables nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 [ 40.442254] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 40.442334] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 40.442393] Workqueue: netns cleanup_net [ 40.442434] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 40.442491] Code: a5 e8 18 ed b9 ff 90 0f 0b 90 90 c3 80 3d d9 ea ea 00 00 75 89 c6 05 d0 ea ea 00 01 90 48 c7 c7 78 de 71 a5 e8 f5 ec b9 ff 90 <0f> 0b 90 90 c3 80 3d b4 ea ea 00 00 0f 85 62 ff ff ff c6 05 a7 ea [ 40.442638] RSP: 0018:ffffba9ac025fd50 EFLAGS: 00010286 [ 40.442690] RAX: 0000000000000000 RBX: ffffba9ac025fd60 RCX: 00000000ffffdfff [ 40.442766] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 40.442839] RBP: ffffba9ac025f868 R08: ffffffffa5b56d28 R09: 00000000ffffdfff [ 40.442902] R10: ffffffffa5a76d40 R11: ffffffffa5b26d40 R12: dead000000000122 [ 40.442976] R13: 00000000fffc0999 R14: 0000000000000001 R15: ffff9c8902fda000 [ 40.443040] FS: 0000000000000000(0000) GS:ffff9c89989d8000(0000) knlGS:0000000000000000 [ 40.443113] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.443170] CR2: 00007f34fd3b2760 CR3: 000000003ac41006 CR4: 0000000000772ef0 [ 40.443237] PKRU: 55555554 [ 40.443267] Call Trace: [ 40.443295] [ 40.443321] netdev_run_todo+0x21a/0x550 [ 40.443359] ops_undo_list+0x1e3/0x1f0 [ 40.443401] cleanup_net+0x1b7/0x2b0 [ 40.443434] process_one_work+0x162/0x380 [ 40.443479] worker_thread+0x299/0x3c0 [ 40.443518] ? rescuer_thread+0x4c0/0x4c0 [ 40.443569] kthread+0x101/0x1f0 [ 40.443604] ? kthreads_online_cpu+0x110/0x110 [ 40.443649] ? kthreads_online_cpu+0x110/0x110 [ 40.443696] ret_from_fork+0x11c/0x140 [ 40.443743] ? kthreads_online_cpu+0x110/0x110 [ 40.443787] ret_from_fork_asm+0x11/0x20 [ 40.443840] [ 40.443869] ---[ end trace 0000000000000000 ]---