[FFmpeg-cvslog] avcodec/wavarc: Check k in decode_5elp()
Michael Niedermayer
git at videolan.org
Tue Oct 3 21:16:09 EEST 2023
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Sep 21 01:10:11 2023 +0200| [9cef555bc52e26e674b0c3988bb20a08315e76e1] | committer: Michael Niedermayer
avcodec/wavarc: Check k in decode_5elp()
regression since 18b2ecc24778140c2bc798ed64842dc8feb6dc3a
Fixes: assertion failure
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6280165808013312
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=9cef555bc52e26e674b0c3988bb20a08315e76e1
---
libavcodec/wavarc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/wavarc.c b/libavcodec/wavarc.c
index d12b826852..09ed4d473a 100644
--- a/libavcodec/wavarc.c
+++ b/libavcodec/wavarc.c
@@ -539,6 +539,8 @@ static int decode_5elp(AVCodecContext *avctx,
if (block_type >= 0 && block_type <= 7) {
k = 1 + (avctx->sample_fmt == AV_SAMPLE_FMT_S16P);
k = get_urice(gb, k) + 1;
+ if (k >= 32)
+ return AVERROR_INVALIDDATA;
}
if (block_type <= 2 || block_type == 6 || block_type == 13 ||
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