From 5205be0c65bf8dee8b51c112083a4cc8a7cebc49 Mon Sep 17 00:00:00 2001 From: pavelkproductengine Date: Wed, 31 May 2017 19:28:46 +0300 Subject: STORM-2148 Crash on trying to save texture file(s) to computer from inventory --- indra/llimage/llpngwrapper.cpp | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'indra/llimage/llpngwrapper.cpp') 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(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 -- cgit v1.2.3