diff options
| -rw-r--r-- | vcl/source/filter/png/PngImageReader.cxx | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/vcl/source/filter/png/PngImageReader.cxx b/vcl/source/filter/png/PngImageReader.cxx index 2af433f9d555..0445aff40af9 100644 --- a/vcl/source/filter/png/PngImageReader.cxx +++ b/vcl/source/filter/png/PngImageReader.cxx @@ -885,9 +885,11 @@ bool PngImageReader::isAPng(SvStream& rStream) rStream.ReadUInt32(nChunkType); if (!rStream.good() || nChunkType != PNG_IHDR_SIGNATURE) return false; - rStream.SeekRel(nChunkSize); + if (!checkSeek(rStream, rStream.Tell() + nChunkSize)) + return false; // Skip IHDR CRC - rStream.SeekRel(PNG_CRC_SIZE); + if (!checkSeek(rStream, rStream.Tell() + PNG_CRC_SIZE)) + return false; // Look for acTL chunk that exists before the first IDAT chunk while (true) { |