diff options
Diffstat (limited to 'indra/llimage/llpngwrapper.cpp')
| -rw-r--r-- | indra/llimage/llpngwrapper.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/indra/llimage/llpngwrapper.cpp b/indra/llimage/llpngwrapper.cpp index da289ea889..b2fa0ed315 100644 --- a/indra/llimage/llpngwrapper.cpp +++ b/indra/llimage/llpngwrapper.cpp @@ -112,6 +112,11 @@ void LLPngWrapper::readDataCallback(png_structp png_ptr, png_bytep dest, png_siz void LLPngWrapper::writeDataCallback(png_structp png_ptr, png_bytep src, png_size_t length) { PngDataInfo *dataInfo = (PngDataInfo *) png_get_io_ptr(png_ptr); + if (dataInfo->mOffset + length > dataInfo->mDataSize)
+ {
+ png_error(png_ptr, "Data write error. Requested data size exceeds available data size.");
+ return;
+ } U8 *dest = &dataInfo->mData[dataInfo->mOffset]; memcpy(dest, src, length); dataInfo->mOffset += static_cast<U32>(length); @@ -272,7 +277,7 @@ void LLPngWrapper::updateMetaData() // Method to write raw image into PNG at dest. The raw scanline begins // at the bottom of the image per SecondLife conventions. -BOOL LLPngWrapper::writePng(const LLImageRaw* rawImage, U8* dest) +BOOL LLPngWrapper::writePng(const LLImageRaw* rawImage, U8* dest, size_t destSize) { try { @@ -313,6 +318,7 @@ BOOL LLPngWrapper::writePng(const LLImageRaw* rawImage, U8* dest) PngDataInfo dataPtr; dataPtr.mData = dest; dataPtr.mOffset = 0; + dataPtr.mDataSize = destSize; png_set_write_fn(mWritePngPtr, &dataPtr, &writeDataCallback, &writeFlush); // Setup image params |