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avcodec/exr: Check xdelta, ydelta

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Fixes: assertion failure
Fixes: 25617/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5648746061496320

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-09-26 21:54:36 +02:00
parent 991246657b
commit 6949df35d0
1 changed files with 2 additions and 1 deletions
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libavcodec/exr.c
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@ -1751,7 +1751,8 @@ static int decode_frame(AVCodecContext *avctx, void *data,
/* Verify the xmin, xmax, ymin and ymax before setting the actual image size.
* It's possible for the data window can larger or outside the display window */
if (s->xmin > s->xmax || s->ymin > s->ymax) {
if (s->xmin > s->xmax || s->ymin > s->ymax ||
s->ydelta == 0xFFFFFFFF || s->xdelta == 0xFFFFFFFF) {
av_log(avctx, AV_LOG_ERROR, "Wrong or missing size information.\n");
return AVERROR_INVALIDDATA;
}