diff options
Diffstat (limited to 'lib/btrfs/types_node.go')
| -rw-r--r-- | lib/btrfs/types_node.go | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/btrfs/types_node.go b/lib/btrfs/types_node.go index 9f20ea9..f425460 100644 --- a/lib/btrfs/types_node.go +++ b/lib/btrfs/types_node.go @@ -128,9 +128,17 @@ func (node *Node) UnmarshalBinary(nodeBuf []byte) (int, error) { Size: uint32(len(nodeBuf)), ChecksumType: node.ChecksumType, } + if len(nodeBuf) <= binstruct.StaticSize(NodeHeader{}) { + return 0, fmt.Errorf("size must be greater than %v, but is %v", + binstruct.StaticSize(NodeHeader{}), + len(nodeBuf)) + } n, err := binstruct.Unmarshal(nodeBuf, &node.Head) if err != nil { return n, err + } else if n != binstruct.StaticSize(NodeHeader{}) { + return n, fmt.Errorf("header consumed %v bytes but expected %v", + n, binstruct.StaticSize(NodeHeader{})) } if node.Head.Level > 0 { _n, err := node.unmarshalInternal(nodeBuf[n:]) |