From a9cc69c0d59057ea172a107e0308fdf5fd8fc04e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 20 Nov 2019 20:34:55 +0100 Subject: [PATCH] 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 --- libavcodec/wmaprodec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index 91a47aeb41..cbf5fa7fd5 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -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++) {