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-rw-r--r--block/crypto.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/crypto.c b/block/crypto.c
index 146d81c90a..33ee01bebd 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -627,7 +627,9 @@ BlockDriver bdrv_crypto_luks = {
.bdrv_probe = block_crypto_probe_luks,
.bdrv_open = block_crypto_open_luks,
.bdrv_close = block_crypto_close,
- .bdrv_child_perm = bdrv_format_default_perms,
+ /* This driver doesn't modify LUKS metadata except when creating image.
+ * Allow share-rw=on as a special case. */
+ .bdrv_child_perm = bdrv_filter_default_perms,
.bdrv_co_create = block_crypto_co_create_luks,
.bdrv_co_create_opts = block_crypto_co_create_opts_luks,
.bdrv_co_truncate = block_crypto_co_truncate,