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avcodec/tiff: Avoid 0.0/0.0 in camera_xyz_coeff()

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Fixes: division by zero
Fixes: 52230/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5922608915021824

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2022-11-17 23:18:01 +01:00
parent b2c1a0fc2b
commit ff2d1bbe73
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1 changed files with 2 additions and 0 deletions
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libavcodec/tiff.c
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@ -1896,6 +1896,8 @@ static void camera_xyz_coeff(TiffContext *s,
for (i = 0; i < 3; i++) {
for (num = j = 0; j < 3; j++)
num += cam2rgb[i][j];
if (!num)
num = 1;
for (j = 0; j < 3; j++)
cam2rgb[i][j] /= num;
s->premultiply[i] = 1.f / num;