[FFmpeg-cvslog] avcodec/apac: Clean padding space

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Aug  4 21:20:55 2024 +0200| [8ca072a373f5e2b6689a8649c79a03d12db5eb0b] | committer: Michael Niedermayer

avcodec/apac: Clean padding space

Fixes: use-of-uninitialized-value
Fixes: 70842/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APAC_fuzzer-5758325067677696

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8ca072a373f5e2b6689a8649c79a03d12db5eb0b
---

 libavcodec/apac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/apac.c b/libavcodec/apac.c
index f740fb5553..068ad09530 100644
--- a/libavcodec/apac.c
+++ b/libavcodec/apac.c
@@ -159,6 +159,7 @@ static int apac_decode(AVCodecContext *avctx, AVFrame *frame,
     buf                = &s->bitstream[s->bitstream_index];
     buf_size          += s->bitstream_size;
     s->bitstream_size  = buf_size;
+    memset(buf + buf_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
 
     frame->nb_samples = s->bitstream_size * 16 * 8;
     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)