[FFmpeg-cvslog] avcodec/g2meet: Check RGB upper limit
Michael Niedermayer
git at videolan.org
Thu May 17 03:25:54 EEST 2018
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Apr 27 20:16:13 2018 +0200| [4dd2c8b9ea46b4e008a8bfc2077834428cd5a17c] | committer: Michael Niedermayer
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 at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4dd2c8b9ea46b4e008a8bfc2077834428cd5a17c
---
libavcodec/g2meet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c
index 5edfb31560..2cf708a4f0 100644
--- a/libavcodec/g2meet.c
+++ b/libavcodec/g2meet.c
@@ -556,7 +556,7 @@ static uint32_t epic_decode_pixel_pred(ePICContext *dc, int x, int y,
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);
return 0;
}
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