avcodec/cfhd: Fix invalid left shift of negative value
authorMichael Niedermayer <michael@niedermayer.cc>
Wed, 28 Jun 2017 18:47:59 +0000 (20:47 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Wed, 28 Jun 2017 21:39:11 +0000 (23:39 +0200)
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 <michael@niedermayer.cc>
libavcodec/cfhd.c

index 16fbdb0..f78bad9 100644 (file)
@@ -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;
             }