[FFmpeg-devel] [PATCH 6/7] avcodec/wavarc: Avoid signed integer overflow in sample

[Michael Niedermayer]

Fixes: signed integer overflow: -2147483648 + -25122315 cannot be represented in type 'int'
Fixes: 62285/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6199806972198912

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/wavarc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/wavarc.c b/libavcodec/wavarc.c
index 09ed4d473a2..99cbaf01091 100644
--- a/libavcodec/wavarc.c
+++ b/libavcodec/wavarc.c
@@ -374,7 +374,7 @@ static int decode_2slp(AVCodecContext *avctx,
                 for (int o = 0; o < order; o++)
                     sum += s->filter[ch][o] * (unsigned)samples[n + 70 - o - 1];
 
-                samples[n + 70] = get_srice(gb, k) + (sum >> 4);
+                samples[n + 70] = get_srice(gb, k) + (unsigned)(sum >> 4);
             }
             finished = 1;
             break;
-- 
2.17.1