virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-28 20:53:54 +02:00
Code Issues Releases Activity

avcodec/dvbsubdec: Check entry_id

Browse Source 
Fixes: randomly writing over the array end
Fixes: 1473/clusterfuzz-testcase-minimized-5768907824562176

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-11 15:18:50 +02:00
parent 3a0ff78168
commit 8a69f2602f
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libavcodec/dvbsubdec.c
View File

@ -1103,9 +1103,9 @@ static int dvbsub_parse_clut_segment(AVCodecContext *avctx,
return AVERROR_INVALIDDATA;
}
if (depth & 0x80)
if (depth & 0x80 && entry_id < 4)
clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
else if (depth & 0x40)
else if (depth & 0x40 && entry_id < 16)
clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
else if (depth & 0x20)
clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);