After used bitmap freeng s->used_bmap points to the freed memory. If we try to free used bitmap one more time it leads to double free error.
Set s->used_bmap to NULL to exclude double free error. Signed-off-by: Alexander Ivanov <alexander.iva...@virtuozzo.com> --- block/parallels.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/parallels.c b/block/parallels.c index 6b46623241..ba1fdde259 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -244,6 +244,7 @@ static void parallels_free_used_bitmap(BlockDriverState *bs) { BDRVParallelsState *s = bs->opaque; s->used_bmap_size = 0; + s->used_bmap = NULL; g_free(s->used_bmap); } -- 2.34.1