[Qemu-devel] [PATCH 2/4] qcow2: Use g_try_new0() for cache array

[Max Reitz <mreitz@redhat.com>]

With a variable cache size, the number given to qcow2_cache_create() may
be huge. Therefore, use g_try_new0().

While at it, use g_new0() instead of g_malloc0() for allocating the
Qcow2Cache object.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 block/qcow2-cache.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c
index fe0615a..6eabfaa 100644
--- a/block/qcow2-cache.c
+++ b/block/qcow2-cache.c
@@ -48,9 +48,12 @@ Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
     Qcow2Cache *c;
     int i;
 
-    c = g_malloc0(sizeof(*c));
+    c = g_new0(Qcow2Cache, 1);
     c->size = num_tables;
-    c->entries = g_new0(Qcow2CachedTable, num_tables);
+    c->entries = g_try_new0(Qcow2CachedTable, num_tables);
+    if (!c->entries) {
+        goto fail;
+    }
 
     for (i = 0; i < c->size; i++) {
         c->entries[i].table = qemu_try_blockalign(bs->file, s->cluster_size);
-- 
2.0.4