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-rw-r--r--block/vhdx.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/block/vhdx.c b/block/vhdx.c
index 8b270b57c9..a9cecd2773 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1171,7 +1171,8 @@ static int vhdx_allocate_block(BlockDriverState *bs, BDRVVHDXState *s,
     /* per the spec, the address for a block is in units of 1MB */
     *new_offset = ROUND_UP(*new_offset, 1024 * 1024);
 
-    return bdrv_truncate(bs->file, *new_offset + s->block_size, NULL);
+    return bdrv_truncate(bs->file, *new_offset + s->block_size,
+                         PREALLOC_MODE_OFF, NULL);
 }
 
 /*
@@ -1607,12 +1608,13 @@ static int vhdx_create_bat(BlockBackend *blk, BDRVVHDXState *s,
     if (type == VHDX_TYPE_DYNAMIC) {
         /* All zeroes, so we can just extend the file - the end of the BAT
          * is the furthest thing we have written yet */
-        ret = blk_truncate(blk, data_file_offset, errp);
+        ret = blk_truncate(blk, data_file_offset, PREALLOC_MODE_OFF, errp);
         if (ret < 0) {
             goto exit;
         }
     } else if (type == VHDX_TYPE_FIXED) {
-        ret = blk_truncate(blk, data_file_offset + image_size, errp);
+        ret = blk_truncate(blk, data_file_offset + image_size,
+                           PREALLOC_MODE_OFF, errp);
         if (ret < 0) {
             goto exit;
         }