The code uses x/ymax + 1 so the maximum is INT_MAX-1 Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int' Fixes: 33158/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5545462457303040
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/exr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 49c4774145..59403fd1f5 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1795,6 +1795,7 @@ static int decode_header(EXRContext *s, AVFrame *frame) ymax = bytestream2_get_le32(gb); if (xmin > xmax || ymin > ymax || + ymax == INT_MAX || xmax == INT_MAX || (unsigned)xmax - xmin >= INT_MAX || (unsigned)ymax - ymin >= INT_MAX) { ret = AVERROR_INVALIDDATA; -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
