From 94c8e53034bc3d5dad6e4f290839e83fc8643154 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 28 Jun 2017 20:47:59 +0200 Subject: [PATCH] avcodec/cfhd: Fix invalid left shift of negative value Fixes: runtime error: left shift of negative value -1 Fixes: 2395/clusterfuzz-testcase-minimized-6540529313513472 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit c709f009dad20d99b28918f4f8d7cd394b838def) Signed-off-by: Michael Niedermayer --- libavcodec/cfhd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c index 16fbdb0b78..f78bad9ae1 100644 --- a/libavcodec/cfhd.c +++ b/libavcodec/cfhd.c @@ -663,7 +663,7 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame, output = s->plane[plane].subband[0]; for (i = 0; i < lowpass_height * 2; i++) { for (j = 0; j < lowpass_width * 2; j++) - output[j] <<= 2; + output[j] *= 4; output += lowpass_width * 2; }