1 files changed, 2 insertions, 0 deletions
diff --git a/block.c b/block.c
index 76bf00f4b2..6c6bb3ec7a 100644
--- a/block.c
+++ b/block.c
@@ -3328,6 +3328,8 @@ int bdrv_truncate(BdrvChild *child, int64_t offset, Error **errp)
         return -EACCES;
     }
 
+    assert(!(bs->open_flags & BDRV_O_INACTIVE));
+
     ret = drv->bdrv_truncate(bs, offset, errp);
     if (ret == 0) {
         ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);