diff options
| author | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2015-12-16 16:48:19 +0100 |
|---|---|---|
| committer | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2015-12-20 15:39:57 +0100 |
| commit | 105be66545ec3fa250e3a4e4792b097cec7f62a1 (patch) | |
| tree | 273f230e4982de35f088089cd6523b34e9d4a0cd | |
| parent | 46e7a63b6e011b47d87b54659b2a3799056e5753 (diff) | |
| download | ffmpeg-105be66545ec3fa250e3a4e4792b097cec7f62a1.tar.gz | |
on2avc: limit number of bits to 30 in get_egolomb
More don't fit into the integer output.
Also use get_bits_long, since get_bits only supports reading up to 25
bits, while get_bits_long supports the full integer range.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 4d5c3b02e9d2c9a630ca433fabca43285879e0b8)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
| -rw-r--r-- | libavcodec/on2avc.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/libavcodec/on2avc.c b/libavcodec/on2avc.c index 7d2e81a57f..15b75e6b09 100644 --- a/libavcodec/on2avc.c +++ b/libavcodec/on2avc.c @@ -211,9 +211,16 @@ static inline int get_egolomb(GetBitContext *gb) { int v = 4; - while (get_bits1(gb)) v++; + while (get_bits1(gb)) { + v++; + if (v > 30) { + av_log(NULL, AV_LOG_WARNING, "Too large golomb code in get_egolomb.\n"); + v = 30; + break; + } + } - return (1 << v) + get_bits(gb, v); + return (1 << v) + get_bits_long(gb, v); } static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst, |