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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-11-03 17:48:29 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-08 23:19:14 +0100 |
| commit | d7c29005a40fbc7f46075a639219d7341fbe2c09 (patch) | |
| tree | a27e463aaaf5349307bde2fc5f142bc0b188cd66 | |
| parent | 8b8502a66f00a0e2ae186d1edd3eeb2ef1eb6bd3 (diff) | |
| download | ffmpeg-d7c29005a40fbc7f46075a639219d7341fbe2c09.tar.gz | |
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 <michael@niedermayer.cc>
(cherry picked from commit 4b51437dccd62fc5491280db44e3c21b44aeeb3f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -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]; |