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-rw-r--r--block/crypto.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/block/crypto.c b/block/crypto.c
index 7aa7eb553e..7cb2ff2946 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -300,6 +300,12 @@ static int block_crypto_open_generic(QCryptoBlockFormat format,
     QCryptoBlockOpenOptions *open_opts = NULL;
     unsigned int cflags = 0;
 
+    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
+                               false, errp);
+    if (!bs->file) {
+        return -EINVAL;
+    }
+
     opts = qemu_opts_create(opts_spec, NULL, 0, &error_abort);
     qemu_opts_absorb_qdict(opts, options, &local_err);
     if (local_err) {
@@ -383,7 +389,7 @@ static int block_crypto_truncate(BlockDriverState *bs, int64_t offset)
 
     offset += payload_offset;
 
-    return bdrv_truncate(bs->file->bs, offset);
+    return bdrv_truncate(bs->file, offset);
 }
 
 static void block_crypto_close(BlockDriverState *bs)