[PATCH v2] resolv: Get rid of alloca usage.

[Joe Simmons-Talbott]

Replace alloca usage with char arrays in _nss_dns_getnetbyname_r and
_nss_dns_getnetbyaddr_r.
---
 resolv/nss_dns/dns-network.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
index 1e6511a4f4..b429384da1 100644
--- a/resolv/nss_dns/dns-network.c
+++ b/resolv/nss_dns/dns-network.c
@@ -116,6 +116,8 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
   querybuf *orig_net_buffer;
   int anslen;
   enum nss_status status;
+  char buf[1024] __attribute__ ((__aligned__ (__alignof__ (querybuf))));
+
 
   struct resolv_context *ctx = __resolv_context_get ();
   if (ctx == NULL)
@@ -125,7 +127,7 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
       return NSS_STATUS_UNAVAIL;
     }
 
-  net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
+  net_buffer.buf = orig_net_buffer = (querybuf *) buf;
 
   anslen = __res_context_search
     (ctx, name, C_IN, T_PTR, net_buffer.buf->buf,
@@ -170,6 +172,7 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result,
   int cnt, anslen;
   uint32_t net2;
   int olderr = errno;
+  char buf[1024] __attribute__ ((__aligned__ (__alignof__ (querybuf))));
 
   /* No net address lookup for IPv6 yet.  */
   if (type != AF_INET)
@@ -209,7 +212,7 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result,
       break;
     }
 
-  net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
+  net_buffer.buf = orig_net_buffer = (querybuf *) buf;
 
   anslen = __res_context_query (ctx, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
 				1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
-- 
2.39.2