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avcodec/exr: x/ymax cannot be INT_MAX

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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 <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-20 20:24:21 +02:00
parent b752d195cc
commit 48342aa075
1 changed files with 1 additions and 0 deletions
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libavcodec/exr.c
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@ -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;