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authorJim Meyering <meyering@redhat.com>2012-08-09 14:29:57 +0200
committerAnand Avati <avati@redhat.com>2012-08-19 09:42:00 -0700
commitd22726cf8a76167acd63a9af7233b798a1e484f2 (patch)
tree36f908f1a1c14a628fec13ccb4b0ffe0d3c95690 /xlators/mgmt/glusterd/src
parent602b0193775bc78768390be08488c3b0aa5601fb (diff)
utils: don't leak after failed GF_REALLOC
This is primarily to avoid a leak upon failed GF_REALLOC when glusterd_readin_file reads a file that is too large. Also, remove unnecessary memset-0 of PATH_MAX+256-byte buffer. Change-Id: Id06bd5faef024e1d865f6f0f56bfbb837c9c6168 BUG: 846755 Signed-off-by: Jim Meyering <meyering@redhat.com> Reviewed-on: http://review.gluster.com/3804 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/mgmt/glusterd/src')
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-utils.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index e10de75c63c..f7d91d77ae7 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -1421,6 +1421,16 @@ out:
return ret;
}
+/* Free LINE[0..N-1] and then the LINE buffer. */
+static void
+free_lines (char **line, size_t n)
+{
+ size_t i;
+ for (i = 0; i < n; i++)
+ GF_FREE (line[i]);
+ GF_FREE (line);
+}
+
char **
glusterd_readin_file (const char *filepath, int *line_count)
{
@@ -1430,6 +1440,7 @@ glusterd_readin_file (const char *filepath, int *line_count)
char buffer[PATH_MAX + 256] = {0};
char **lines = NULL;
FILE *fp = NULL;
+ void *p;
fp = fopen (filepath, "r");
if (!fp)
@@ -1443,19 +1454,27 @@ glusterd_readin_file (const char *filepath, int *line_count)
if (counter == n-1) {
n *= 2;
- lines = GF_REALLOC (lines, n * sizeof (char *));
- if (!lines)
+ p = GF_REALLOC (lines, n * sizeof (char *));
+ if (!p) {
+ free_lines (lines, n/2);
+ lines = NULL;
goto out;
+ }
+ lines = p;
}
lines[counter] = gf_strdup (buffer);
- memset (buffer, 0, sizeof (buffer));
}
lines[counter] = NULL;
- lines = GF_REALLOC (lines, (counter + 1) * sizeof (char *));
- if (!lines)
+ /* Reduce allocation to minimal size. */
+ p = GF_REALLOC (lines, (counter + 1) * sizeof (char *));
+ if (!p) {
+ free_lines (lines, counter);
+ lines = NULL;
goto out;
+ }
+ lines = p;
*line_count = counter;
ret = 0;