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| author | Martin Storsjö <martin@martin.st> | 2013-09-11 22:47:06 +0300 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2013-09-12 10:54:05 +0300 |
| commit | 459f2b393a3f89ed08d10fbceb4738d1429f268e (patch) | |
| tree | b8b6dac8c463b3365e60207e8bb9ed3298b447ab /libavformat | |
| parent | 0d61f260010707f3028b818e8b24598e1a83d696 (diff) | |
| download | ffmpeg-459f2b393a3f89ed08d10fbceb4738d1429f268e.tar.gz | |
mpc8: Check the seek table size parsed from the bitstream
Limit the size to INT_MAX/2 (for simplicity) to be sure that
size + FF_INPUT_BUFFER_PADDING_SIZE won't overflow.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/mpc8.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c index c3c70e051e..29001b19f6 100644 --- a/libavformat/mpc8.c +++ b/libavformat/mpc8.c @@ -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 < 0 || size >= INT_MAX / 2) { + av_log(s, AV_LOG_ERROR, "Bad seek table size\n"); + return; + } if(!(buf = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE))) return; avio_read(s->pb, buf, size); |