har0ke/FFmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

avformat/mov: Check edit list for overflow

Browse Source 
Fixes: 67492/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5778297231310848
Fixes: signed integer overflow: 2314885530818453536 + 7782220156096217088 cannot be represented in type 'long'

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 2882d30e3acfc3155e2be11db653c7c721f94f34)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-03-25 03:13:50 +01:00
parent 2191f4f5d6
commit 8941956c32
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libavformat/mov.c
View File

@ -3683,6 +3683,10 @@ static int get_edit_list_entry(MOVContext *mov,
}
*edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
global_timescale);
if (*edit_list_duration + (uint64_t)*edit_list_media_time > INT64_MAX)
*edit_list_duration = 0;
return 1;
}