[ 2.517354] sctp: Hash tables configured (bind 256/256) [ 20.441881] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.453746] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.517466] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.727729] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.734087] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.942670] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.955407] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.965408] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.975952] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 20.996498] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.934922] ------------[ cut here ]------------ [ 40.935013] refcount_t: underflow; use-after-free. [ 40.935122] WARNING: CPU: 3 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 40.935249] Modules linked in: nf_conntrack_netlink nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sctp_diag nft_limit tcp_diag inet_diag nfnetlink_queue nft_queue nf_tables veth sctp ip6_udp_tunnel udp_tunnel [ 40.935498] CPU: 3 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 40.935602] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 40.935674] Workqueue: netns cleanup_net [ 40.935733] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 40.935794] Code: b2 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 f1 b2 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 [ 40.935984] RSP: 0018:ffff978e8025fd50 EFLAGS: 00010286 [ 40.936049] RAX: 0000000000000000 RBX: ffff978e8025fd60 RCX: 00000000ffffdfff [ 40.936140] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 40.936220] RBP: ffff978e8025f868 R08: ffffffffb3356d28 R09: 00000000ffffdfff [ 40.936308] R10: ffffffffb3276d40 R11: ffffffffb3326d40 R12: dead000000000122 [ 40.936395] R13: 00000000fffc0b68 R14: 0000000000000001 R15: ffff89740112d000 [ 40.936478] FS: 0000000000000000(0000) GS:ffff89748b358000(0000) knlGS:0000000000000000 [ 40.936568] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.936641] CR2: 00007ff79f0cb760 CR3: 000000001f041004 CR4: 0000000000772ef0 [ 40.936723] PKRU: 55555554 [ 40.936756] Call Trace: [ 40.936791] [ 40.936826] netdev_run_todo+0x21a/0x550 [ 40.936894] ops_undo_list+0x1e3/0x1f0 [ 40.936956] cleanup_net+0x1b7/0x2b0 [ 40.937006] process_one_work+0x162/0x380 [ 40.937079] worker_thread+0x299/0x3c0 [ 40.937128] ? rescuer_thread+0x4c0/0x4c0 [ 40.937176] kthread+0x101/0x1f0 [ 40.937229] ? kthreads_online_cpu+0x110/0x110 [ 40.937286] ? kthreads_online_cpu+0x110/0x110 [ 40.937342] ret_from_fork+0x11c/0x140 [ 40.937406] ? kthreads_online_cpu+0x110/0x110 [ 40.937472] ret_from_fork_asm+0x11/0x20 [ 40.937534] [ 40.937567] ---[ end trace 0000000000000000 ]---