From: John Crispin <blogic@openwrt.org>
Date: Wed, 27 Aug 2014 17:49:04 +0000 (+0200)
Subject: fix potential buffer overflow when txt records are forged
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fmdnsd.git;a=commitdiff_plain;h=029c1bb0168e3fc6d71846b2ea79e2ac32e29cc2

fix potential buffer overflow when txt records are forged

Signed-off-by: John Crispin <blogic@openwrt.org>
---

diff --git a/cache.c b/cache.c
index e775537..cdc4a79 100644
--- a/cache.c
+++ b/cache.c
@@ -274,7 +274,7 @@ cache_answer(struct interface *iface, uint8_t *base, int blen, char *name, struc
 			uint8_t v = *p;
 
 			*p = '\0';
-			if (v)
+			if (v && p + v < &rdata_buffer[rdlength])
 				p += v + 1;
 		} while (*p);
 		break;