[FFmpeg-devel] [PATCH 4/5] avutil/lfg: Correct index type to avoid undefined behavior

[Michael Niedermayer]

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 18333/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_COMFORTNOISE_fuzzer-5668481831272448

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavutil/lfg.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavutil/lfg.h b/libavutil/lfg.h
index 03f779ad8a..8b18df2cea 100644
--- a/libavutil/lfg.h
+++ b/libavutil/lfg.h
@@ -26,7 +26,7 @@
 
 typedef struct AVLFG {
     unsigned int state[64];
-    int index;
+    unsigned index;
 } AVLFG;
 
 void av_lfg_init(AVLFG *c, unsigned int seed);
-- 
2.23.0