ffmpeg | branch: release/2.6 | Andreas Cadhalpun <andreas.cadhal...@googlemail.com> | Fri Dec 18 19:28:51 2015 +0100| [c4b2985d9ab0eaac9e8b454b693570ef80f41175] | committer: Andreas Cadhalpun
xwddec: prevent overflow of lsize * avctx->height This is used to check if the input buffer is large enough, so if this overflows it can cause a false negative leading to a segmentation fault in bytestream2_get_bufferu. Reviewed-by: Michael Niedermayer <mich...@niedermayer.cc> Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com> (cherry picked from commit 9d38f06d05efbb9d6196c27668eb943e934943ae) Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c4b2985d9ab0eaac9e8b454b693570ef80f41175 --- libavcodec/xwddec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/xwddec.c b/libavcodec/xwddec.c index 62dfdac..18b1f93 100644 --- a/libavcodec/xwddec.c +++ b/libavcodec/xwddec.c @@ -141,7 +141,7 @@ static int xwd_decode_frame(AVCodecContext *avctx, void *data, return AVERROR_INVALIDDATA; } - if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + avctx->height * lsize) { + if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + (uint64_t)avctx->height * lsize) { av_log(avctx, AV_LOG_ERROR, "input buffer too small\n"); return AVERROR_INVALIDDATA; } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
