virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-24 13:56:33 +02:00
Code Issues Releases Activity

avformat/concatdec: clip outpoint - inpoint overflow in get_best_effort_duration()

Browse Source 
An alternative would be to limit all time/duration fields to below 64bit

Fixes: signed integer overflow: -93000000 - 9223372036839000000 cannot be represented in type 'long long'
Fixes: 64546/clusterfuzz-testcase-minimized-ffmpeg_dem_CONCAT_fuzzer-5110813828186112

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 dd733b2be472cea766c62984237533b239e9a93d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-12-26 03:51:23 +01:00
parent 0100d1ae97
commit c746bc5269
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavformat/concatdec.c
View File

@ -324,7 +324,7 @@ static int64_t get_best_effort_duration(ConcatFile *file, AVFormatContext *avf)
if (file->user_duration != AV_NOPTS_VALUE) if (file->user_duration != AV_NOPTS_VALUE)
return file->user_duration; return file->user_duration;
if (file->outpoint != AV_NOPTS_VALUE) if (file->outpoint != AV_NOPTS_VALUE)
return file->outpoint - file->file_inpoint; return av_sat_sub64(file->outpoint, file->file_inpoint);
if (avf->duration > 0) if (avf->duration > 0)
return avf->duration - (file->file_inpoint - file->file_start_time); return avf->duration - (file->file_inpoint - file->file_start_time);
if (file->next_dts != AV_NOPTS_VALUE) if (file->next_dts != AV_NOPTS_VALUE)