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mpc8: check seektable size before attempting to use it. 

Fixes null pointer dereference

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-02 04:21:42 +01:00
parent ff7e2342bb
commit b61ba262a1
1 changed files with 4 additions and 0 deletions
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4
libavformat/mpc8.c
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@ -145,6 +145,10 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off)
av_log(s, AV_LOG_ERROR, "No seek table at given position\n");
return;
}
if (size > INT_MAX/10 || size<=0) {
av_log(s, AV_LOG_ERROR, "Seek table size is invalid\n");
return;
}
if(!(buf = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE)))
return;
avio_read(s->pb, buf, size);