From: Roy Marples <roy@marples.name>
Date: Tue, 6 Sep 2016 16:39:03 +0000 (+0000)
Subject: Always roundup the required buffer.
X-Git-Tag: v6.11.4~34
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4faac32f3a6b1120bed7272bdea473da886a64d0;p=thirdparty%2Fdhcpcd.git

Always roundup the required buffer.
---

diff --git a/common.c b/common.c
index c2bb94e9..cbea738e 100644
--- a/common.c
+++ b/common.c
@@ -411,9 +411,10 @@ recvmsg_realloc(int fd, struct msghdr *msg, int flags)
 		 * on truncation, not the actual size needed.
 		 * So grow the buffer and try again. */
 		if (iov->iov_len == len)
-			len = roundup(len + 1, IOVEC_BUFSIZ);
+			len++;
 		else if (iov->iov_len > len)
 			break;
+		len = roundup(len, IOVEC_BUFSIZ);
 		if ((n = realloc(iov->iov_base, len)) == NULL)
 			return -1;
 		iov->iov_base = n;