[FFmpeg-cvslog] avcodec/utils: use 32pixel alignment for bink
Michael Niedermayer
git at videolan.org
Thu Oct 19 14:30:38 EEST 2023
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jan 22 00:32:44 2023 +0100| [34e18aecf70546e82b973e72a993c586f2fdbaef] | 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=34e18aecf70546e82b973e72a993c586f2fdbaef
---
libavcodec/utils.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 4c470f13dc..f74ce3ace7 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -360,6 +360,8 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
case AV_PIX_FMT_GBRP16BE:
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:
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