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avformat/mpeg: Check len in mpegps_probe() 

Fixes: CID1473590 Untrusted loop bound

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ca237a841e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-06-07 00:19:01 +02:00
parent 68089f6940
commit 07cbcedc46
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1 changed files with 3 additions and 0 deletions
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libavformat/mpeg.c
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@ -79,6 +79,9 @@ static int mpegps_probe(const AVProbeData *p)
int pes = endpes <= i && check_pes(p->buf + i, p->buf + p->buf_size);
int pack = check_pack_header(p->buf + i);
if (len > INT_MAX - i)
break;
if (code == SYSTEM_HEADER_START_CODE)
sys++;
else if (code == PACK_START_CODE && pack)