diff options
| author | Michael Niedermayer <[email protected]> | 2017-11-03 17:48:29 +0100 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2017-12-07 23:38:06 +0100 |
| commit | 3ca4f1868d66b8bae61dbf0bd78071aca8d61bb0 (patch) | |
| tree | 99f216605d6610eea230694ded9f17c69b3903fc | |
| parent | 0ee2cb866c023d72073408be0c117acf817a276a (diff) | |
avcodec/xan: Check for bitstream end in xan_huffman_decode()
Fixes: Timeout
Fixes: 3707/clusterfuzz-testcase-6465922706440192
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 4b51437dccd62fc5491280db44e3c21b44aeeb3f)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavcodec/xan.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/xan.c b/libavcodec/xan.c index 8b4ec82405..1ccf164847 100644 --- a/libavcodec/xan.c +++ b/libavcodec/xan.c @@ -131,7 +131,10 @@ static int xan_huffman_decode(uint8_t *dest, int dest_len, return ret; while (val != 0x16) { - unsigned idx = val - 0x17 + get_bits1(&gb) * byte; + unsigned idx; + if (get_bits_left(&gb) < 1) + return AVERROR_INVALIDDATA; + idx = val - 0x17 + get_bits1(&gb) * byte; if (idx >= 2 * byte) return AVERROR_INVALIDDATA; val = src[idx]; |