Fix small memleaks in nis_passwd() and nis_group().

These only occur upon error.

Code Review:	https://reviews.freebsd.org/D1849
Reviewed by:	delphij

CID:	1016715
CID:	1016717

2 files changed, 6 insertions, 2 deletions

diff --git a/lib/libc/gen/getgrent.c b/lib/libc/gen/getgrent.c
index 4ba24ae..1f4d7e9 100644
--- a/lib/libc/gen/getgrent.c
+++ b/lib/libc/gen/getgrent.c
@@ -1173,8 +1173,10 @@ nis_group(void *retval, void *mdata, va_list ap)
 		 * terminator, alignment padding, and one (char *)
 		 * pointer for the member list terminator.
 		 */
-		if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *))
+		if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *)) {
+			free(result);
 			goto erange;
+		}
 		memcpy(buffer, result, resultlen);
 		buffer[resultlen] = '\0';
 		free(result);
diff --git a/lib/libc/gen/getpwent.c b/lib/libc/gen/getpwent.c
index 6cd7eaf..0cb8ed2 100644
--- a/lib/libc/gen/getpwent.c
+++ b/lib/libc/gen/getpwent.c
@@ -1392,8 +1392,10 @@ nis_passwd(void *retval, void *mdata, va_list ap)
 				continue;
 			}
 		}
-		if (resultlen >= bufsize)
+		if (resultlen >= bufsize) {
+			free(result);
 			goto erange;
+		}
 		memcpy(buffer, result, resultlen);
 		buffer[resultlen] = '\0';
 		free(result);