[FFmpeg-cvslog] checkasm/sw_scale: Fix stack-buffer-overflow

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Tue May 19 08:30:05 2020 +0200| [57e570b508d967785b758e54c505db76c1597927] | committer: Andreas Rheinhardt

checkasm/sw_scale: Fix stack-buffer-overflow

A buffer whose size is not a multiple of four has been initialized using
consecutive writes of 32bits. This results in a stack-buffer-overflow
reported by ASAN in the checkasm-sw_scale FATE-test.

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=57e570b508d967785b758e54c505db76c1597927
---

 tests/checkasm/sw_scale.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/checkasm/sw_scale.c b/tests/checkasm/sw_scale.c
index 2680e47897..9efa2b4def 100644
--- a/tests/checkasm/sw_scale.c
+++ b/tests/checkasm/sw_scale.c
@@ -53,7 +53,7 @@ static void check_hscale(void)
     struct SwsContext *ctx;
 
     // padded
-    LOCAL_ALIGNED_32(uint8_t, src, [SRC_PIXELS + MAX_FILTER_WIDTH - 1]);
+    LOCAL_ALIGNED_32(uint8_t, src, [FFALIGN(SRC_PIXELS + MAX_FILTER_WIDTH - 1, 4)]);
     LOCAL_ALIGNED_32(uint32_t, dst0, [SRC_PIXELS]);
     LOCAL_ALIGNED_32(uint32_t, dst1, [SRC_PIXELS]);