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avcodec/g2meet: Check RGB upper limit 

Fixes: runtime error: left shift of 1876744317 by 16 places cannot be represented in type 'int'
Fixes: 6799/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G2M_fuzzer-5115274731716608

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 2018-04-27 20:16:13 +02:00
parent 50d6b7bd83
commit 4dd2c8b9ea
1 changed files with 1 additions and 1 deletions
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2
libavcodec/g2meet.c
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@ -556,7 +556,7 @@ static uint32_t epic_decode_pixel_pred(ePICContext *dc, int x, int y,
B = ((pred >> B_shift) & 0xFF) - TOSIGNED(delta); B = ((pred >> B_shift) & 0xFF) - TOSIGNED(delta);
} }
if (R<0 || G<0 || B<0) { if (R<0 || G<0 || B<0 || R > 255 || G > 255 || B > 255) {
av_log(NULL, AV_LOG_ERROR, "RGB %d %d %d is out of range\n", R, G, B); av_log(NULL, AV_LOG_ERROR, "RGB %d %d %d is out of range\n", R, G, B);
return 0; return 0;
} }