avcodec/scpr: Fix use of uninitialized variable
authorMichael Niedermayer <michael@niedermayer.cc>
Wed, 27 Feb 2019 23:12:14 +0000 (00:12 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Wed, 13 Mar 2019 23:24:44 +0000 (00:24 +0100)
Fixes: Undefined shift
Fixes: 12911/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-5677102915911680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 53248acfb3b23007c89ae822d7bcae451272d5a7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/scpr.c

index e41fbbe..5714e25 100644 (file)
@@ -512,7 +512,7 @@ static int decompress_p(AVCodecContext *avctx,
 {
     SCPRContext *s = avctx->priv_data;
     GetByteContext *gb = &s->gb;
-    int ret, temp, min, max, x, y, cx = 0, cx1 = 0;
+    int ret, temp = 0, min, max, x, y, cx = 0, cx1 = 0;
     int backstep = linesize - avctx->width;
 
     if (bytestream2_get_byte(gb) == 0)