qcow2_co_pwritev_compressed() should not call bdrv_truncate()
if determining the size failed.
Reported-by: Markus Armbruster <arm...@redhat.com>
Signed-off-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Reviewed-by: Jeff Cody <jc...@redhat.com>
Reviewed-by: Kevin Wolf <kw...@redhat.com>
Reviewed-by: John Snow <js...@redhat.com>
---
block/qcow2.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 99407403ea..40ba26c111 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3282,12 +3282,15 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs,
uint64_t offset,
z_stream strm;
int ret, out_len;
uint8_t *buf, *out_buf;
- uint64_t cluster_offset;
+ int64_t cluster_offset;
if (bytes == 0) {
/* align end of file to a sector boundary to ease reading with
sector based I/Os */
cluster_offset = bdrv_getlength(bs->file->bs);
+ if (cluster_offset < 0) {
+ return cluster_offset;
+ }
return bdrv_truncate(bs->file, cluster_offset, PREALLOC_MODE_OFF,
NULL);
}
--
2.13.4
