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-rw-r--r--hesiod/nss_hesiod/hesiod-grp.c34
1 files changed, 29 insertions, 5 deletions
diff --git a/hesiod/nss_hesiod/hesiod-grp.c b/hesiod/nss_hesiod/hesiod-grp.c
index a89ed4edaf..5551d7d012 100644
--- a/hesiod/nss_hesiod/hesiod-grp.c
+++ b/hesiod/nss_hesiod/hesiod-grp.c
@@ -25,6 +25,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/param.h>
#include "nss_hesiod.h"
@@ -165,7 +166,8 @@ internal_gid_from_group (void *context, const char *groupname, gid_t *group)
enum nss_status
_nss_hesiod_initgroups_dyn (const char *user, gid_t group, long int *start,
- long int *size, gid_t **groupsp, int *errnop)
+ long int *size, gid_t **groupsp, long int limit,
+ int *errnop)
{
enum nss_status status = NSS_STATUS_SUCCESS;
char **list = NULL;
@@ -191,11 +193,22 @@ _nss_hesiod_initgroups_dyn (const char *user, gid_t group, long int *start,
{
/* Need a bigger buffer. */
gid_t *newgroups;
- newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+ long int newsize;
+
+ if (limit > 0 && *size == limit)
+ /* We reached the maximum. */
+ goto done;
+
+ if (limit <= 0)
+ newsize = 2 * *size;
+ else
+ newsize = MIN (limit, 2 * *size);
+
+ newgroups = realloc (groups, newsize * sizeof (*groups));
if (newgroups == NULL)
goto done;
*groupsp = groups = newgroups;
- *size *= 2;
+ *size = newsize;
}
groups[(*start)++] = group;
@@ -232,11 +245,22 @@ _nss_hesiod_initgroups_dyn (const char *user, gid_t group, long int *start,
{
/* Need a bigger buffer. */
gid_t *newgroups;
- newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+ long int newsize;
+
+ if (limit > 0 && *size == limit)
+ /* We reached the maximum. */
+ goto done;
+
+ if (limit <= 0)
+ newsize = 2 * *size;
+ else
+ newsize = MIN (limit, 2 * *size);
+
+ newgroups = realloc (groups, newsize * sizeof (*groups));
if (newgroups == NULL)
goto done;
*groupsp = groups = newgroups;
- *size *= 2;
+ *size = newsize;
}
groups[(*start)++] = group;