[FFmpeg-cvslog] avcodec/utils: use 32pixel alignment for bink

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jan 22 00:32:44 2023 +0100| [22cca60c21b17d3bdf48362c8007b4492dbaaf50] | committer: Michael Niedermayer

avcodec/utils: use 32pixel alignment for bink

bink supports 16x16 blocks in chroma planes thus we need to allocate enough.
Fixes: out of array access
Fixes: 55026/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINK_fuzzer-6013915371012096
Reviewed-by: Peter Ross <pross at xvid.org>

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 b95b2c8492fc1b52afd8fbe67b3be3cd518485d6)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=22cca60c21b17d3bdf48362c8007b4492dbaaf50
---

 libavcodec/utils.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index bdd9a60c39..51ce11939c 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -256,6 +256,8 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
     case AV_PIX_FMT_GBRAP16BE:
         w_align = 16; //FIXME assume 16 pixel per macroblock
         h_align = 16 * 2; // interlaced needs 2 macroblocks height
+        if (s->codec_id == AV_CODEC_ID_BINKVIDEO)
+            w_align = 16*2;
         break;
     case AV_PIX_FMT_YUV411P:
     case AV_PIX_FMT_YUVJ411P: