From d92f313d4b44caea1ff403ddf74878f4c79657e0 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Wed, 3 Jul 2024 23:45:38 +0100
Subject: [PATCH] Credit to OSS-Fuzz:
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=68210 Use readOrThrow()
 to detect premature EOF.

---
 src/asfvideo.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/asfvideo.cpp b/src/asfvideo.cpp
index f52d39eb6a..6d0abcb00c 100644
--- a/src/asfvideo.cpp
+++ b/src/asfvideo.cpp
@@ -235,7 +235,7 @@ void AsfVideo::readMetadata() {
 
 AsfVideo::HeaderReader::HeaderReader(const BasicIo::UniquePtr& io) : IdBuf_(GUID) {
   if (io->size() >= io->tell() + GUID + QWORD) {
-    IdBuf_ = io->read(GUID);
+    IdBuf_ = io->readOrThrow(GUID, Exiv2::ErrorCode::kerCorruptedMetadata);
 
     size_ = readQWORDTag(io);
     if (size_ >= GUID + QWORD)
@@ -291,7 +291,7 @@ void AsfVideo::decodeBlock() {
 
 void AsfVideo::decodeHeader() {
   DataBuf nbHeadersBuf(DWORD + 1);
-  io_->read(nbHeadersBuf.data(), DWORD);
+  io_->readOrThrow(nbHeadersBuf.data(), DWORD, Exiv2::ErrorCode::kerCorruptedMetadata);
 
   uint32_t nb_headers = Exiv2::getULong(nbHeadersBuf.data(), littleEndian);
   Internal::enforce(nb_headers < std::numeric_limits<uint32_t>::max(), Exiv2::ErrorCode::kerCorruptedMetadata);
@@ -353,7 +353,7 @@ void AsfVideo::DegradableJPEGMedia() {
 }
 
 void AsfVideo::streamProperties() {
-  DataBuf streamTypedBuf = io_->read(GUID);
+  DataBuf streamTypedBuf = io_->readOrThrow(GUID, Exiv2::ErrorCode::kerCorruptedMetadata);
 
   enum class streamTypeInfo { Audio = 1, Video = 2 };
   auto stream = static_cast<streamTypeInfo>(0);
@@ -471,7 +471,7 @@ void AsfVideo::contentDescription() {
 }  // AsfVideo::extendedContentDescription
 
 void AsfVideo::fileProperties() {
-  DataBuf FileIddBuf = io_->read(GUID);
+  DataBuf FileIddBuf = io_->readOrThrow(GUID, Exiv2::ErrorCode::kerCorruptedMetadata);
   xmpData()["Xmp.video.FileID"] = GUIDTag(FileIddBuf.data()).to_string();
   xmpData()["Xmp.video.FileLength"] = readQWORDTag(io_);
   xmpData()["Xmp.video.CreationDate"] = readQWORDTag(io_);