From 90ea514d75ec29188012040e5451ae91da1b4dc7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 5 May 2017 18:01:25 +0200 Subject: [PATCH] avcodec/wnv1: Fix runtime error: left shift of negative value -1 Fixes: 1338/clusterfuzz-testcase-minimized-6485546354343936 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 9fac508ca46f93450ec232299dfd15ac70b6f326) Signed-off-by: Michael Niedermayer --- libavcodec/wnv1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/wnv1.c b/libavcodec/wnv1.c index 99aee3cd1c..cbf271afc6 100644 --- a/libavcodec/wnv1.c +++ b/libavcodec/wnv1.c @@ -52,7 +52,7 @@ static inline int wnv1_get_code(WNV1Context *w, int base_value) if (v == 15) return ff_reverse[get_bits(&w->gb, 8 - w->shift)]; else - return base_value + ((v - 7) << w->shift); + return base_value + ((v - 7U) << w->shift); } static int decode_frame(AVCodecContext *avctx,