1 files changed, 6 insertions, 3 deletions
diff --git a/volumes.c b/volumes.c
index 974c6012..2ae2d1bb 100644
--- a/volumes.c
+++ b/volumes.c
@@ -1963,9 +1963,12 @@ int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
 	u32 cur_offset;
 	struct btrfs_key key;
 
-	sb = btrfs_find_create_tree_block(fs_info,
-					  BTRFS_SUPER_INFO_OFFSET,
-					  BTRFS_SUPER_INFO_SIZE);
+	if (fs_info->nodesize < BTRFS_SUPER_INFO_SIZE) {
+		printf("ERROR: nodesize %u too small to read superblock\n",
+				fs_info->nodesize);
+		return -EINVAL;
+	}
+	sb = btrfs_find_create_tree_block(fs_info, BTRFS_SUPER_INFO_OFFSET);
 	if (!sb)
 		return -ENOMEM;
 	btrfs_set_buffer_uptodate(sb);