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qdict: fix unbounded stack warning for qdict_array_entries 

Here we use one g_strdup_printf() to replace the two stack allocated
array, considering it's more convenient, safe, and as long as it's
called rarely only when quorum device opens. This will remove the
unbound stack warning when compiling with "-Wstack-usage=1000000".

Reviewed-by:   Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
master
Peter Xu 2016-03-22 10:37:26 +08:00 committed by Michael Tokarev
parent 1d817db3a0
commit de4905f4bc
1 changed files with 8 additions and 11 deletions
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19
qobject/qdict.c
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@ -705,19 +705,16 @@ int qdict_array_entries(QDict *src, const char *subqdict)
for (i = 0; i < INT_MAX; i++) {
QObject *subqobj;
int subqdict_entries;
size_t slen = 32 + subqdict_len;
char indexstr[slen], prefix[slen];
size_t snprintf_ret;
snprintf_ret = snprintf(indexstr, slen, "%s%u", subqdict, i);
assert(snprintf_ret < slen);
subqobj = qdict_get(src, indexstr);
snprintf_ret = snprintf(prefix, slen, "%s%u.", subqdict, i);
assert(snprintf_ret < slen);
char *prefix = g_strdup_printf("%s%u.", subqdict, i);
subqdict_entries = qdict_count_prefixed_entries(src, prefix);
/* Remove ending "." */
prefix[strlen(prefix) - 1] = 0;
subqobj = qdict_get(src, prefix);
g_free(prefix);
if (subqdict_entries < 0) {
return subqdict_entries;
}