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authormalc <av1474@comtv.ru>2009-05-21 05:40:23 +0400
committermalc <av1474@comtv.ru>2009-05-21 05:40:53 +0400
commiteb0b64f7aa7f6f325aac878265ee9e6c2fc1bf51 (patch)
tree0b4ecb18462560a15f405d79546211900f8aba6f
parent0a656f5f21553b9b69392d89e28d18361a0e3405 (diff)
downloadhqemu-eb0b64f7aa7f6f325aac878265ee9e6c2fc1bf51.zip
hqemu-eb0b64f7aa7f6f325aac878265ee9e6c2fc1bf51.tar.gz
Do not attempt to allocate sn_tab when there are no snapshots
This was caught by a7d27b536ffc0773028a90f14580552c0c3ddb2a which aborted on this attempt, thanks to Alex Ivanov for report. Signed-off-by: malc <av1474@comtv.ru>
-rw-r--r--block/qcow2.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c
index a6de9b6..33f3299 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2259,6 +2259,11 @@ static int qcow_snapshot_list(BlockDriverState *bs,
QCowSnapshot *sn;
int i;
+ if (!s->nb_snapshots) {
+ *psn_tab = NULL;
+ return s->nb_snapshots;
+ }
+
sn_tab = qemu_mallocz(s->nb_snapshots * sizeof(QEMUSnapshotInfo));
for(i = 0; i < s->nb_snapshots; i++) {
sn_info = sn_tab + i;
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