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demux_mkv: minor improvement to overflow check 

CC: @mpv-player/stable
This commit is contained in:
wm4 2014-07-02 00:14:18 +02:00
parent 9a210ca2d5
commit bb131f4c66
1 changed files with 3 additions and 2 deletions
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5
demux/demux_mkv.c
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@ -271,7 +271,8 @@ static bstr demux_mkv_decode(struct mp_log *log, mkv_track_t *track,
} else if (enc->comp_algo == 2) {
/* lzo encoded track */
int out_avail;
if (size > INT_MAX / 3 + AV_LZO_OUTPUT_PADDING)
int maxlen = INT_MAX - AV_LZO_OUTPUT_PADDING;
if (size >= maxlen / 3)
goto error;
int dstlen = size * 3;
@ -291,7 +292,7 @@ static bstr demux_mkv_decode(struct mp_log *log, mkv_track_t *track,
goto error;
}
mp_dbg(log, "lzo decompression buffer too small.\n");
if (dstlen > INT_MAX / 2 + AV_LZO_OUTPUT_PADDING) {
if (dstlen >= maxlen / 2) {
talloc_free(dest);
dest = NULL;
goto error;