If buf_size % granularity is not 0, mirror_free_init() will
do dangerous things.
Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
---
block/mirror.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/mirror.c b/block/mirror.c
index 58f391a..9521212 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -684,7 +684,7 @@ static void mirror_start_job(BlockDriverState *bs,
BlockDriverState *target,
s->is_none_mode = is_none_mode;
s->base = base;
s->granularity = granularity;
- s->buf_size = MAX(buf_size, granularity);
+ s->buf_size = ROUND_UP(buf_size, granularity);
s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp);
if (!s->dirty_bitmap) {
--
2.1.0
