[FFmpeg-cvslog] avcodec/proresenc_kostya: use unsigned alpha for rotation

[Michael Niedermayer]

ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jun 18 15:48:26 2024 +0200| [ce845325897b411da4687ac41f9a83fd3f7da9c4] | committer: Michael Niedermayer

avcodec/proresenc_kostya: use unsigned alpha for rotation

Fixes: left shift of negative value -208
Fixes: 69073/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PRORES_KS_fuzzer-4745020002336768

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 93e0265e27e6dd567812a8661988109421c5447a)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ce845325897b411da4687ac41f9a83fd3f7da9c4
---

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

diff --git a/libavcodec/proresenc_kostya.c b/libavcodec/proresenc_kostya.c
index b2b4bbe3d0..2571ae9427 100644
--- a/libavcodec/proresenc_kostya.c
+++ b/libavcodec/proresenc_kostya.c
@@ -339,7 +339,7 @@ static void get_slice_data(ProresContext *ctx, const uint16_t *src,
 
 static void get_alpha_data(ProresContext *ctx, const uint16_t *src,
                            ptrdiff_t linesize, int x, int y, int w, int h,
-                           int16_t *blocks, int mbs_per_slice, int abits)
+                           uint16_t *blocks, int mbs_per_slice, int abits)
 {
     const int slice_width = 16 * mbs_per_slice;
     int i, j, copy_w, copy_h;