ffmpeg | branch: release/3.2 | Michael Niedermayer <mich...@niedermayer.cc> | Fri Nov 3 17:48:29 2017 +0100| [d7c29005a40fbc7f46075a639219d7341fbe2c09] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> (cherry picked from commit 4b51437dccd62fc5491280db44e3c21b44aeeb3f) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d7c29005a40fbc7f46075a639219d7341fbe2c09 --- libavcodec/xan.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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]; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
