From 22b24fe8ae76d0ce3bc3cdbde37c4057cf59801a Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 2 Nov 2019 15:15:46 +0100 Subject: [PATCH] avcodec/wmavoice: Fix integer overflow in synth_frame() Fixes: left shift of negative value -3 Fixes: 18518/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAVOICE_fuzzer-6560514359951360 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit cf323f4d38f5756ecdb8fb4f72c80a8069da832e) Signed-off-by: Michael Niedermayer --- libavcodec/wmavoice.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c index b3c33389cd..06d9db66be 100644 --- a/libavcodec/wmavoice.c +++ b/libavcodec/wmavoice.c @@ -1497,7 +1497,7 @@ static int synth_frame(AVCodecContext *ctx, GetBitContext *gb, int frame_idx, /* "pitch-diff-per-sample" for calculation of pitch per sample */ s->pitch_diff_sh16 = - ((cur_pitch_val - s->last_pitch_val) << 16) / MAX_FRAMESIZE; + (cur_pitch_val - s->last_pitch_val) * (1 << 16) / MAX_FRAMESIZE; } /* Global gain (if silence) and pitch-adaptive window coordinates */