[Qemu-devel] [PATCH 2/2] block/qapi: fix unbounded stack for dump_qdict

[Peter Xu]

Using heap instead of stack for better safety.

Signed-off-by: Peter Xu <pet...@redhat.com>
---
 block/qapi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/qapi.c b/block/qapi.c
index c4c2115..b798e35 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -636,9 +636,8 @@ static void dump_qdict(fprintf_function func_fprintf, void 
*f, int indentation,
     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
         QType type = qobject_type(entry->value);
         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
-        char key[strlen(entry->key) + 1];
+        char *key = g_malloc(strlen(entry->key) + 1);
         int i;
-
         /* replace dashes with spaces in key (variable) names */
         for (i = 0; entry->key[i]; i++) {
             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
@@ -650,6 +649,7 @@ static void dump_qdict(fprintf_function func_fprintf, void 
*f, int indentation,
         if (!composite) {
             func_fprintf(f, "\n");
         }
+        g_free(key);
     }
 }
 
-- 
2.4.3