From 1850c3feaa1c7b5b63a55c61075029fa59c84e66 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 26 Oct 2019 21:56:03 +0200 Subject: [PATCH] avcodec/g723_1dec: fix invalid shift with negative sid_gain Fixes: left shift of negative value -1 Fixes: 18395/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G723_1_fuzzer-5710313034350592 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavcodec/g723_1dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/g723_1dec.c b/libavcodec/g723_1dec.c index a7bf528470..f601d31d00 100644 --- a/libavcodec/g723_1dec.c +++ b/libavcodec/g723_1dec.c @@ -677,7 +677,7 @@ static int estimate_sid_gain(G723_1_ChannelContext *p) if (p->sid_gain < 0) t = INT32_MIN; else t = INT32_MAX; } else - t = p->sid_gain << shift; + t = p->sid_gain * (1 << shift); } else if(shift < -31) { t = (p->sid_gain < 0) ? -1 : 0; }else