linux-kernel - syztest

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250629144748.45117-1-contact@arnaud-lcm.com>
Date: Sun, 29 Jun 2025 15:47:48 +0100
From: Arnaud Lecomte <contact@...aud-lcm.com>
To: syzbot+827ae2bfb3a3529333e9@...kaller.appspotmail.com
Cc: agordeev@...ux.ibm.com,
	alibuda@...ux.alibaba.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	guwen@...ux.alibaba.com,
	horms@...nel.org,
	jaka@...ux.ibm.com,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	linux-s390@...r.kernel.org,
	netdev@...r.kernel.org,
	pabeni@...hat.com,
	syzkaller-bugs@...glegroups.com,
	tonylu@...ux.alibaba.com,
	wenjia@...ux.ibm.com
Subject: syztest

#syz test

--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -126,8 +126,12 @@ static struct sock *smc_tcp_syn_recv_sock(const struct sock *sk,
 	struct smc_sock *smc;
 	struct sock *child;
 
+	lockdep_assert_held_read(&sk->sk_callback_lock);
 	smc = smc_clcsock_user_data(sk);
 
+	if (!smc)
+		goto drop;
+
 	if (READ_ONCE(sk->sk_ack_backlog) + atomic_read(&smc->queued_smc_hs) >
 				sk->sk_max_ack_backlog)
 		goto drop;
-- 
2.43.0