change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/net/ipv6/syncookies.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  IPv6 Syncookies implementation for the Linux kernel
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  *
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@@ -6,12 +7,6 @@
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  *
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  *  Based on IPv4 implementation by Andi Kleen
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  *  linux/net/ipv4/syncookies.c
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- *
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- *	This program is free software; you can redistribute it and/or
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- *      modify it under the terms of the GNU General Public License
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- *      as published by the Free Software Foundation; either version
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- *      2 of the License, or (at your option) any later version.
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- *
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  */
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 #include <linux/tcp.h>
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@@ -146,7 +141,8 @@
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 	__u8 rcv_wscale;
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 	u32 tsoff = 0;
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-	if (!sock_net(sk)->ipv4.sysctl_tcp_syncookies || !th->ack || th->rst)
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+	if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies) ||
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+	    !th->ack || th->rst)
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 		goto out;
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 	if (tcp_synq_no_recent_overflow(sk))
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@@ -175,7 +171,8 @@
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 		goto out;
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 	ret = NULL;
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-	req = inet_reqsk_alloc(&tcp6_request_sock_ops, sk, false);
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+	req = cookie_tcp_reqsk_alloc(&tcp6_request_sock_ops,
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+				     &tcp_request_sock_ipv6_ops, sk, skb);
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 	if (!req)
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 		goto out;
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@@ -238,7 +235,7 @@
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 		fl6.fl6_dport = ireq->ir_rmt_port;
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 		fl6.fl6_sport = inet_sk(sk)->inet_sport;
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 		fl6.flowi6_uid = sk->sk_uid;
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-		security_req_classify_flow(req, flowi6_to_flowi(&fl6));
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+		security_req_classify_flow(req, flowi6_to_flowi_common(&fl6));
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 		dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
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 		if (IS_ERR(dst))