[FFmpeg-cvslog] avcodec/vorbisdec: Check codebook float values to be finite

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Sun Feb 12 22:49:01 2023 +0100| [42451dd791c9d8a7510016c23471660036844529] | committer: Michael Niedermayer

avcodec/vorbisdec: Check codebook float values to be finite

Fixes: Timeout
Fixes: 55116/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VORBIS_fuzzer-4572159970508800

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit cadd7e7a7589b5c118ad1648a09c629a6b65a3be)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=42451dd791c9d8a7510016c23471660036844529
---

 libavcodec/vorbisdec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c
index be6d1b2d21..c748aa574f 100644
--- a/libavcodec/vorbisdec.c
+++ b/libavcodec/vorbisdec.c
@@ -363,6 +363,10 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
             unsigned codebook_value_bits = get_bits(gb, 4) + 1;
             unsigned codebook_sequence_p = get_bits1(gb);
 
+            if (!isfinite(codebook_minimum_value) || !isfinite(codebook_delta_value)) {
+                ret = AVERROR_INVALIDDATA;
+                goto error;
+            }
             ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
                     codebook_lookup_values);
             ff_dlog(NULL, "  delta %f minmum %f \n",