DiscIO: Add out of bounds checks for blob reading

1 files changed, 6 insertions, 0 deletions

diff --git a/Source/Core/DiscIO/DirectoryBlob.cpp b/Source/Core/DiscIO/DirectoryBlob.cpp
index 723133fd8b..514fdc7c44 100644
--- a/Source/Core/DiscIO/DirectoryBlob.cpp
+++ b/Source/Core/DiscIO/DirectoryBlob.cpp
@@ -375,6 +375,9 @@ DirectoryBlobReader::DirectoryBlobReader(const std::string& game_partition_root,
 
 bool DirectoryBlobReader::Read(u64 offset, u64 length, u8* buffer)
 {
+  if (offset + length > m_data_size)
+    return false;
+
   // TODO: We don't handle raw access to the encrypted area of Wii discs correctly.
   return (m_is_wii ? m_nonpartition_contents : m_gamecube_pseudopartition.GetContents())
       .Read(offset, length, buffer);
@@ -394,6 +397,9 @@ bool DirectoryBlobReader::ReadWiiDecrypted(u64 offset, u64 size, u8* buffer, u64
   if (it == m_partitions.end())
     return false;
 
+  if (offset + size > it->second.GetDataSize())
+    return false;
+
   return it->second.GetContents().Read(offset, size, buffer);
 }