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

avcodec/h264_parser: Check pts for overflow

Browse Source 
Fixes: signed integer overflow: 9223372036854775807 + 3546086691638400 cannot be represented in type 'int64_t' (aka 'long')
Fixes: 471723681/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4841032488648704

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 30a6b78bd4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-02-14 01:46:48 +01:00
parent 07f5159ddb
commit b7e56970da
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libavcodec/h264_parser.c
+6 -2
View File
@@ -631,8 +631,12 @@ static int h264_parse(AVCodecParserContext *s,
s->dts = av_sat_add64(p->reference_dts, av_rescale(s->dts_ref_dts_delta, num, den));
}
if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE)
s->pts = s->dts + av_rescale(s->pts_dts_delta, num, den);
if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE) {
int64_t pts_dts_delta = av_rescale(s->pts_dts_delta, num, den);
uint64_t pts = (uint64_t)s->dts + pts_dts_delta;
if (pts == av_sat_add64(s->dts, pts_dts_delta))
s->pts = pts;
}
if (s->dts_sync_point > 0)
p->reference_dts = s->dts; // new reference