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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-17 19:18:31 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-04 20:26:35 +0200 |
| commit | a7f6b27e3c3a2106ac21cde3013471e9aec08ad5 (patch) | |
| tree | ebbcc7634b20ddd1983760fe93dd103218b37feb | |
| parent | 517fd68acd7e7a5472fa3c42d2f833773fbcb5b3 (diff) | |
| download | ffmpeg-a7f6b27e3c3a2106ac21cde3013471e9aec08ad5.tar.gz | |
avcodec/ralf: fix undefined shift
Fixes: left shift of negative value -2
Fixes: 16145/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RALF_fuzzer-5146671058518016
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 0ee886988e75b3c22cabc2ca0fadcf8e4f787640)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/ralf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/ralf.c b/libavcodec/ralf.c index 619fd7126a..d2d803b0d4 100644 --- a/libavcodec/ralf.c +++ b/libavcodec/ralf.c @@ -300,8 +300,8 @@ static int decode_channel(RALFContext *ctx, GetBitContext *gb, int ch, t = get_vlc2(gb, code_vlc->table, code_vlc->bits, 2); code1 = t / range2; code2 = t % range2; - dst[i] = extend_code(gb, code1, range, 0) << add_bits; - dst[i + 1] = extend_code(gb, code2, range, 0) << add_bits; + dst[i] = extend_code(gb, code1, range, 0) * (1 << add_bits); + dst[i + 1] = extend_code(gb, code2, range, 0) * (1 << add_bits); if (add_bits) { dst[i] |= get_bits(gb, add_bits); dst[i + 1] |= get_bits(gb, add_bits); |