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avcodec/wmaprodec: Fixes integer overflow with 32bit samples 

Fixes: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 18860/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAPRO_fuzzer-5755223125786624

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-11-20 20:34:55 +01:00
parent 50db30b47d
commit a9cc69c0d5
1 changed files with 1 additions and 1 deletions
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libavcodec/wmaprodec.c
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@ -544,7 +544,7 @@ static av_cold int decode_init(WMAProDecodeCtx *s, AVCodecContext *avctx, int nu
for (i = 0; i < WMAPRO_BLOCK_SIZES; i++)
ff_mdct_init(&s->mdct_ctx[i], WMAPRO_BLOCK_MIN_BITS+1+i, 1,
1.0 / (1 << (WMAPRO_BLOCK_MIN_BITS + i - 1))
/ (1 << (s->bits_per_sample - 1)));
/ (1ll << (s->bits_per_sample - 1)));
/** init MDCT windows: simple sine window */
for (i = 0; i < WMAPRO_BLOCK_SIZES; i++) {