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Do not attempt to allocate sn_tab when there are no snapshots
author
malc
<av1474@comtv.ru>
Thu, 21 May 2009 01:40:23 +0000
(
05:40
+0400)
committer
malc
<av1474@comtv.ru>
Thu, 21 May 2009 01:40:53 +0000
(
05:40
+0400)
This was caught by
a7d27b536ffc0773028a90f14580552c0c3ddb2a
which
aborted on this attempt, thanks to Alex Ivanov for report.
Signed-off-by: malc <av1474@comtv.ru>
block/qcow2.c
patch
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diff --git
a/block/qcow2.c
b/block/qcow2.c
index
a6de9b6
..
33f3299
100644
(file)
--- 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;