From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 3 Jun 2014 21:23:12 +0000 (+0200)
Subject: dns: use alloca instead of malloc to fix memleak in dns_send_answer()
X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fmdnsd.git;a=commitdiff_plain;h=85ac2adb78d343c0bf75e055380afa557816546e

dns: use alloca instead of malloc to fix memleak in dns_send_answer()

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---

diff --git a/dns.c b/dns.c
index 517825b..cf8c3d5 100644
--- a/dns.c
+++ b/dns.c
@@ -182,10 +182,7 @@ dns_send_answer(struct uloop_fd *u, char *answer)
 	h.answers = __cpu_to_be16(dns_answer_cnt);
 	h.flags = __cpu_to_be16(0x8400);
 
-	iov = malloc(sizeof(struct iovec) * ((dns_answer_cnt * 3) + 1));
-	if (!iov)
-		return;
-
+	iov = alloca(sizeof(struct iovec) * ((dns_answer_cnt * 3) + 1));
 	iov[0].iov_base = &h;
 	iov[0].iov_len = sizeof(struct dns_header);