From: Kevin Wolf <[email protected]> This triggers if bs->drv becomes NULL in a concurrent request. This is currently only the case when corruption prevention kicks in (i.e. at most once per image, and after that it produces I/O errors).
Signed-off-by: Kevin Wolf <[email protected]> Signed-off-by: Stefan Hajnoczi <[email protected]> --- block/qcow2-cluster.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 76d2bcf..4208dc0 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -379,7 +379,8 @@ static int coroutine_fn copy_sectors(BlockDriverState *bs, BLKDBG_EVENT(bs->file, BLKDBG_COW_READ); if (!bs->drv) { - return -ENOMEDIUM; + ret = -ENOMEDIUM; + goto out; } /* Call .bdrv_co_readv() directly instead of using the public block-layer -- 1.9.0
