imgcodecs(tiff): avoid leak of helper struct on malformed inputs

backporting of commit: 45428b897f
6 years ago · 2ece029fe0
parent 6894651027
commit 2ece029fe0
1 changed files with 2 additions and 0 deletions
--- a/modules/imgcodecs/src/grfmt_tiff.cpp
+++ b/modules/imgcodecs/src/grfmt_tiff.cpp
@ -214,6 +214,8 @@ bool TiffDecoder::readHeader()
                                  &TiffDecoderBufHelper::write, &TiffDecoderBufHelper::seek,
                                  &TiffDecoderBufHelper::close, &TiffDecoderBufHelper::size,
                                  &TiffDecoderBufHelper::map, /*unmap=*/0 );
+            if (!tif)
+                delete buf_helper;
        }
        else
        {