[FFmpeg-cvslog] swscale/utils: Fix xInc overflow

[Michael Niedermayer]

ffmpeg | branch: release/5.1 | Michael Niedermayer <michael at niedermayer.cc> | Thu Apr  4 00:31:40 2024 +0200| [5335c73b9f6f872522c88eae1f3d673a04d7b360] | committer: Michael Niedermayer

swscale/utils: Fix xInc overflow

Fixes: signed integer overflow: 2 * 1073741824 cannot be represented in type 'int'
Fixes: 67802/clusterfuzz-testcase-minimized-ffmpeg_SWS_fuzzer-6249515855183872

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 1a9eda65d027e0167f7363e0514f71311ac5d8d1)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5335c73b9f6f872522c88eae1f3d673a04d7b360
---

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

diff --git a/libswscale/utils.c b/libswscale/utils.c
index b5cc4f30ca..4f94adbb30 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -541,7 +541,7 @@ static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
                 filter[i * filterSize + j] = coeff;
                 xx++;
             }
-            xDstInSrc += 2 * xInc;
+            xDstInSrc += 2LL * xInc;
         }
     }