From: Roy Marples <roy@marples.name>
Date: Fri, 2 Sep 2016 14:29:54 +0000 (+0000)
Subject: Test slen is not -1 before setting error on MSG_TRUNC.
X-Git-Tag: v6.11.4~53
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf5305c09884a2979a36fe7b5bc401b9044b640b;p=thirdparty%2Fdhcpcd.git

Test slen is not -1 before setting error on MSG_TRUNC.
---

diff --git a/common.c b/common.c
index 9b803226..0988b94a 100644
--- a/common.c
+++ b/common.c
@@ -420,7 +420,7 @@ recvmsg_realloc(int fd, struct msghdr *msg, int flags)
 	}
 
 	slen = recvmsg(fd, msg, flags);
-	if (msg->msg_flags & MSG_TRUNC) {
+	if (slen != -1 && msg->msg_flags & MSG_TRUNC) {
 		/* This should not be possible ... */
 		errno = ENOBUFS;
 		return -1;