linux-kernel - Re: [syzbot] [bpf?] [net?] WARNING in __sk_msg

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Date: Tue,  9 Jan 2024 13:34:48 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+f2977222e0e95cec15c8@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bpf?] [net?] WARNING in __sk_msg_free

please test WARNING in __sk_msg_free

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index e37b4d2e2acd..68dbe821f61d 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1016,6 +1016,8 @@ static int tls_sw_sendmsg_locked(struct sock *sk, struct msghdr *msg,
 
 		msg_pl = &rec->msg_plaintext;
 		msg_en = &rec->msg_encrypted;
+		if (msg_pl->sg.end >= MAX_MSG_FRAGS)
+			return -EINVAL;
 
 		orig_size = msg_pl->sg.size;
 		full_record = false;