virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-03 05:10:03 +02:00
Code Issues Releases Activity

avcodec/apedec: Fix integer overflow in filter_3800()

Browse Source 
Fixes: signed integer overflow: 2117181180 + 60483298 cannot be represented in type 'int'
Fixes: 18344/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5685327791915008

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1c038c5c63)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-21 00:26:25 +02:00
parent 5ebee49b34
commit ffc4603e61
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/apedec.c
View File

@ -881,7 +881,7 @@ static av_always_inline int filter_3800(APEPredictor *p,
p->coeffsB[filter][1] -= (((d4 >> 30) & 2) - 1) * sign;
p->filterB[filter] = p->lastA[filter] + (predictionB >> shift);
p->filterA[filter] = p->filterB[filter] + ((int)(p->filterA[filter] * 31U) >> 5);
p->filterA[filter] = p->filterB[filter] + (unsigned)((int)(p->filterA[filter] * 31U) >> 5);
return p->filterA[filter];
}