[FFmpeg-devel] [PATCH] avcodec/scpr: Fix use of uninitialized variable

Michael Niedermayer michael at niedermayer.cc
Thu Feb 28 01:49:00 EET 2019


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 at niedermayer.cc>
---
 libavcodec/scpr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/scpr.c b/libavcodec/scpr.c
index cf511f83cc..750cf59fe4 100644
--- a/libavcodec/scpr.c
+++ b/libavcodec/scpr.c
@@ -372,7 +372,7 @@ 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)
-- 
2.21.0



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