linux-kernel - Re: [syzbot] [smc?] general protection fault in __smc_diag

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Message-ID: <20251017065045.1706877-1-wangliang74@huawei.com>
Date: Fri, 17 Oct 2025 14:50:45 +0800
From: Wang Liang <wangliang74@...wei.com>
To: <syzbot+f775be4458668f7d220e@...kaller.appspotmail.com>
CC: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	<linux-rdma@...r.kernel.org>, <syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] [smc?] general protection fault in __smc_diag_dump (4)

#syz test

diff --git a/net/smc/smc_inet.c b/net/smc/smc_inet.c
index a944e7dcb8b9..a94084b4a498 100644
--- a/net/smc/smc_inet.c
+++ b/net/smc/smc_inet.c
@@ -56,7 +56,6 @@ static struct inet_protosw smc_inet_protosw = {
 	.protocol	= IPPROTO_SMC,
 	.prot		= &smc_inet_prot,
 	.ops		= &smc_inet_stream_ops,
-	.flags		= INET_PROTOSW_ICSK,
 };
 
 #if IS_ENABLED(CONFIG_IPV6)
@@ -104,27 +103,15 @@ static struct inet_protosw smc_inet6_protosw = {
 	.protocol	= IPPROTO_SMC,
 	.prot		= &smc_inet6_prot,
 	.ops		= &smc_inet6_stream_ops,
-	.flags		= INET_PROTOSW_ICSK,
 };
 #endif /* CONFIG_IPV6 */
 
-static unsigned int smc_sync_mss(struct sock *sk, u32 pmtu)
-{
-	/* No need pass it through to clcsock, mss can always be set by
-	 * sock_create_kern or smc_setsockopt.
-	 */
-	return 0;
-}
-
 static int smc_inet_init_sock(struct sock *sk)
 {
 	struct net *net = sock_net(sk);
 
 	/* init common smc sock */
 	smc_sk_init(net, sk, IPPROTO_SMC);
-
-	inet_csk(sk)->icsk_sync_mss = smc_sync_mss;
-
 	/* create clcsock */
 	return smc_create_clcsk(net, sk, sk->sk_family);
 }
-- 
2.34.1