[FFmpeg-cvslog] avcodec/wavarc: Allocate AV_INPUT_BUFFER_PADDING_SIZE

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Sep 21 00:29:24 2023 +0200| [dbcf285abdc7921b065491862be048bdd0c9289d] | committer: Michael Niedermayer

avcodec/wavarc: Allocate AV_INPUT_BUFFER_PADDING_SIZE

Fixes: overread
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-5963163952349184
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6048030137909248

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=dbcf285abdc7921b065491862be048bdd0c9289d
---

 libavcodec/wavarc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/wavarc.c b/libavcodec/wavarc.c
index 6941ba9ab5..d12b826852 100644
--- a/libavcodec/wavarc.c
+++ b/libavcodec/wavarc.c
@@ -111,7 +111,7 @@ static av_cold int wavarc_init(AVCodecContext *avctx)
     }
 
     s->max_framesize = s->nb_samples * 16;
-    s->bitstream = av_calloc(s->max_framesize, sizeof(*s->bitstream));
+    s->bitstream = av_calloc(s->max_framesize + AV_INPUT_BUFFER_PADDING_SIZE, sizeof(*s->bitstream));
     if (!s->bitstream)
         return AVERROR(ENOMEM);