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avformat/mm: Check length

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Fixes: CID1220824 Overflowed constant

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 139bf412464e62a83984cd49093936dcaa7a0865)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-11 19:29:14 +02:00
parent 0644c26777
commit 37f05d29b6
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1 changed files with 1 additions and 1 deletions
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libavformat/mm.c
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@ -94,7 +94,7 @@ static int read_header(AVFormatContext *s)
type = avio_rl16(pb);
length = avio_rl32(pb);
if (type != MM_TYPE_HEADER)
if (type != MM_TYPE_HEADER || length < 10)
return AVERROR_INVALIDDATA;
/* read header */