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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-08 19:20:31 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:44 +0100 |
| commit | e9fa01eb600d658a728c2e9b049be07c737e5398 (patch) | |
| tree | f92c27a063ae3a896b2789fea769bb4a80121de2 | |
| parent | 54c0706a2de6c7fc35c694f3e231be165c1599fb (diff) | |
| download | ffmpeg-e9fa01eb600d658a728c2e9b049be07c737e5398.tar.gz | |
avcodec/wmaprodec: Fix buflen computation in save_bits()
Fixes: Assertion failure
Fixes: 18630/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAPRO_fuzzer-5201588654440448
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 589cb44498b5e9683c95746255a2abd6d1e74f94)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/wmaprodec.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index a5d8c91a1d..b3960c2761 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -1564,9 +1564,9 @@ static void save_bits(WMAProDecodeCtx *s, GetBitContext* gb, int len, s->frame_offset = get_bits_count(gb) & 7; s->num_saved_bits = s->frame_offset; init_put_bits(&s->pb, s->frame_data, MAX_FRAMESIZE); - } - - buflen = (put_bits_count(&s->pb) + len + 8) >> 3; + buflen = (s->num_saved_bits + len + 7) >> 3; + } else + buflen = (put_bits_count(&s->pb) + len + 7) >> 3; if (len <= 0 || buflen > MAX_FRAMESIZE) { avpriv_request_sample(s->avctx, "Too small input buffer"); |