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authorFam Zheng <famz@redhat.com>2014-04-29 18:14:17 +0800
committerKevin Wolf <kwolf@redhat.com>2014-04-29 13:43:08 +0200
commitc3cc95bd155d51fc1f9b7259b3bff20a361a1cca (patch)
tree6986f4b0090614b4b7c4ddc38fc806def663203d /block
parent373df5b135b4a54e0abb394e9e703fef3ded093c (diff)
downloadhqemu-c3cc95bd155d51fc1f9b7259b3bff20a361a1cca.zip
hqemu-c3cc95bd155d51fc1f9b7259b3bff20a361a1cca.tar.gz
mirror: Check for bdrv_get_info result
bdrv_get_info could fail. Add check before using the returned value. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/mirror.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/block/mirror.c b/block/mirror.c
index 403714c..1c38aa8 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -339,7 +339,10 @@ static void coroutine_fn mirror_run(void *opaque)
bdrv_get_backing_filename(s->target, backing_filename,
sizeof(backing_filename));
if (backing_filename[0] && !s->target->backing_hd) {
- bdrv_get_info(s->target, &bdi);
+ ret = bdrv_get_info(s->target, &bdi);
+ if (ret < 0) {
+ goto immediate_exit;
+ }
if (s->granularity < bdi.cluster_size) {
s->buf_size = MAX(s->buf_size, bdi.cluster_size);
s->cow_bitmap = bitmap_new(length);
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