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avformat/mpegts: Limit copied data to space 

Fixes: out of array access
Fixes: 26816/clusterfuzz-testcase-minimized-ffmpeg_dem_MPEGTSRAW_fuzzer-6282861159907328.fuzz

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 79cf7c7191)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-11-04 01:06:47 +01:00
parent 14e4f69fba
commit 0040f0f11b
1 changed files with 1 additions and 1 deletions
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2
libavformat/mpegts.c
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@ -3165,7 +3165,7 @@ static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
}
if (data != pkt->data)
memcpy(pkt->data, data, ts->raw_packet_size);
memcpy(pkt->data, data, TS_PACKET_SIZE);
finished_reading_packet(s, ts->raw_packet_size);
if (ts->mpeg2ts_compute_pcr) {
/* compute exact PCR for each packet */