Huw Davies : dnsapi: Free the buffer in the early return paths.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5b0430a178ec16f05967065df7160efec5ee2b3d
URL:    https://gitlab.winehq.org/wine/wine/-/commit/5b0430a178ec16f05967065df7160ef...

Author: Huw Davies <huw(a)codeweavers.com>
Date:   Thu Dec 21 14:07:54 2023 +0000

dnsapi: Free the buffer in the early return paths.

---

 dlls/dnsapi/libresolv.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/dnsapi/libresolv.c b/dlls/dnsapi/libresolv.c
index d68ca1fd9bf..9034651ac6d 100644
--- a/dlls/dnsapi/libresolv.c
+++ b/dlls/dnsapi/libresolv.c
@@ -192,11 +192,16 @@ static NTSTATUS resolv_get_serverlist( void *args )
         if (filter( buf[i].sin.sin_family, params->family )) continue;
         found++;
     }
-    if (!found) return DNS_ERROR_NO_DNS_SERVERS;
+    if (!found)
+    {
+        free( buf );
+        return DNS_ERROR_NO_DNS_SERVERS;
+    }
 
     needed = FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[found]);
     if (!addrs || *params->len < needed)
     {
+        free( buf );
         *params->len = needed;
         return !addrs ? ERROR_SUCCESS : ERROR_MORE_DATA;
     }