[PATCH v2 1/2] gethostbyaddr_r: add space for alias pointers

[Nikolaus Voss]

addr_list and alias where on the same buffer offset. This led
to corrupt addr_list which was overwritten by the resolved name.

Signed-off-by: Nikolaus Voss <n.voss at weinmann.de>
---
 libc/inet/resolv.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index 021d5bf..4d96c5c 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -2402,6 +2402,8 @@ int gethostbyaddr_r(const void *addr, socklen_t addrlen,
 	 */
 #define in6 ((struct in6_addr *)in)
 	alias = (char **)buf;
+	buf += sizeof(*addr_list) * 2;
+	buflen -= sizeof(*addr_list) * 2;
 	addr_list = (struct in_addr**)buf;
 	buf += sizeof(*addr_list) * 2;
 	buflen -= sizeof(*addr_list) * 2;
-- 
1.7.5.4