Signed-off-by: Kevin Wolf <kw...@redhat.com>
Reviewed-by: Max Reitz <mre...@redhat.com>
---
block.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index d89c344..990a754 100644
--- a/block.c
+++ b/block.c
@@ -1184,7 +1184,12 @@ void bdrv_append_temp_snapshot(BlockDriverState *bs,
Error **errp)
instead of opening 'filename' directly */
/* Get the required size from the image */
- total_size = bdrv_getlength(bs) & BDRV_SECTOR_MASK;
+ total_size = bdrv_getlength(bs);
+ if (total_size < 0) {
+ error_setg_errno(errp, -total_size, "Could not get image size");
+ return;
+ }
+ total_size &= BDRV_SECTOR_MASK;
/* Create the temporary image */
ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));
--
1.8.3.1
