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authorShyamsundarR <srangana@redhat.com>2018-08-22 15:04:52 -0400
committerN Balachandran <nbalacha@redhat.com>2018-08-24 05:11:11 +0000
commit2785d2fdf710fcd323bef2d1cbbf17fe823a289f (patch)
treef96da2adbf6f40e544b34cf5131321c15ca7a7c4 /xlators/cluster
parentf191bb7bc1abd250bdf0a5a6972ce95fcbd3314b (diff)
dht/switch: Fix coverity issues
CID: 1124779: dup_childs not freed in an err path CID: 1382398: option_string leaked CID: 1382389: memcpy may cause string overflow Also, fixed up NULL termination for the string Potential use after free (or double free in this case) as below, (link split into multiple lines) https://download.gluster.org/pub/gluster/glusterfs/static-analysis/ master/glusterfs-coverity/2018-08-22-0ebaa9c6/html/ 1/427switch.c.html#error Change-Id: I76681af6a8091666918a3d5dff30a152a7b97905 Updates: bz#789278 Signed-off-by: ShyamsundarR <srangana@redhat.com>
Diffstat (limited to 'xlators/cluster')
-rw-r--r--xlators/cluster/dht/src/switch.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/xlators/cluster/dht/src/switch.c b/xlators/cluster/dht/src/switch.c
index 9795ff4af4d..8b66a09b822 100644
--- a/xlators/cluster/dht/src/switch.c
+++ b/xlators/cluster/dht/src/switch.c
@@ -617,9 +617,10 @@ set_switch_pattern (xlator_t *this, dht_conf_t *conf,
char *pattern = NULL;
char *childs = NULL;
char *option_string = NULL;
- struct switch_struct *switch_buf = NULL;
- struct switch_struct *switch_opt = NULL;
- struct switch_struct *trav = NULL;
+ size_t pattern_length;
+ struct switch_struct *switch_buf = NULL;
+ struct switch_struct *switch_opt = NULL;
+ struct switch_struct *trav = NULL;
struct switch_sched_array *switch_buf_array = NULL;
xlator_list_t *trav_xl = NULL;
@@ -670,11 +671,22 @@ set_switch_pattern (xlator_t *this, dht_conf_t *conf,
" hence neglecting current option");
switch_str = strtok_r (NULL, ";", &tmp_str);
GF_FREE (switch_opt);
+ switch_opt = NULL;
GF_FREE (dup_str);
continue;
}
GF_FREE (dup_str);
- memcpy (switch_opt->path_pattern, pattern, strlen (pattern));
+
+ pattern_length = strlen (pattern);
+ if (pattern_length >= (sizeof (switch_opt->path_pattern))) {
+ gf_msg (this->name, GF_LOG_ERROR, 0,
+ DHT_MSG_SET_SWITCH_PATTERN_ERROR,
+ "Pattern (%s) too long", pattern);
+ goto err;
+ }
+ memcpy (switch_opt->path_pattern, pattern, pattern_length);
+ switch_opt->path_pattern[pattern_length] = '\0';
+
if (childs) {
dup_childs = gf_strdup (childs);
child = strtok_r (dup_childs, ",", &tmp);
@@ -689,6 +701,7 @@ set_switch_pattern (xlator_t *this, dht_conf_t *conf,
"pattern can only be scheduled "
"only to a subvolume of %s",
child, this->name, this->name);
+ GF_FREE (dup_childs);
goto err;
}
}
@@ -808,10 +821,12 @@ set_switch_pattern (xlator_t *this, dht_conf_t *conf,
/* */
conf->private = switch_buf;
+ GF_FREE (option_string);
return 0;
err:
GF_FREE (switch_buf_array);
GF_FREE (switch_opt);
+ GF_FREE (option_string);
if (switch_buf) {
trav = switch_buf;