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>
9 months ago · 9c52069b83
parent 002c1b4ddb
commit 9c52069b83
1 changed files with 3 additions and 0 deletions
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@ -75,6 +75,9 @@ 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)