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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-20 23:59:26 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-21 00:40:20 +0100 |
| commit | 0a65dae9d0c01730323695fdc45eb1c1f5a978f7 (patch) | |
| tree | 3d341c6e32c42f35b1956c40929d990e5c434bef /libavcodec | |
| parent | e04108dfa6d13d171b0e1b5646cc10ce51050bed (diff) | |
| download | ffmpeg-0a65dae9d0c01730323695fdc45eb1c1f5a978f7.tar.gz | |
avcodec/flacdec: reduce limit for golomb so that the max value does not overflow
Fixes: runtime error: left shift of 32 by 26 places cannot be represented in type 'int'
Fixes: 628/clusterfuzz-testcase-6187747641393152
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/flacdec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/flacdec.c b/libavcodec/flacdec.c index 6ea86d4eb1..f73a32b461 100644 --- a/libavcodec/flacdec.c +++ b/libavcodec/flacdec.c @@ -258,8 +258,9 @@ static int decode_residuals(FLACContext *s, int32_t *decoded, int pred_order) for (; i < samples; i++) *decoded++ = get_sbits_long(&s->gb, tmp); } else { + int real_limit = tmp ? (INT_MAX >> tmp) + 2 : INT_MAX; for (; i < samples; i++) { - int v = get_sr_golomb_flac(&s->gb, tmp, INT_MAX, 0); + int v = get_sr_golomb_flac(&s->gb, tmp, real_limit, 0); if (v == 0x80000000){ av_log(s->avctx, AV_LOG_ERROR, "invalid residual\n"); return AVERROR_INVALIDDATA; |