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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-11-03 17:48:29 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-31 22:56:14 +0100 |
| commit | 1376beb658d3a4bac3ec6b317332c734ec4a2460 (patch) | |
| tree | 9d0db3122ebb4e882ef447d3e66e447fbf2be1fd | |
| parent | 907a704c9f6c4255bccdb2a45cb89d94e4520257 (diff) | |
| download | ffmpeg-1376beb658d3a4bac3ec6b317332c734ec4a2460.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 85fa8e7394..cafcbed9dc 100644 --- a/libavcodec/xan.c +++ b/libavcodec/xan.c @@ -130,7 +130,10 @@ 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]; |