qemu-img check calls bdrv_check() twice if the first run repaired some
inconsistencies. If the first run however again triggered corruption
prevention (on qcow2) due to very bad inconsistencies, bs->drv may be
NULL afterwards. Thus, bdrv_check() should check whether bs->drv is set.
Signed-off-by: Max Reitz <mre...@redhat.com>
---
block.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block.c b/block.c
index 8cf519b..2b470d8 100644
--- a/block.c
+++ b/block.c
@@ -2203,6 +2203,9 @@ bool bdrv_dev_is_medium_locked(BlockDriverState *bs)
*/
int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix)
{
+ if (bs->drv == NULL) {
+ return -ENOMEDIUM;
+ }
if (bs->drv->bdrv_check == NULL) {
return -ENOTSUP;
}
--
2.0.3
