[FFmpeg-cvslog] avformat/wavdec: Check that smv block fits in available space
Michael Niedermayer
git at videolan.org
Fri May 26 19:21:18 EEST 2023
ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun Mar 5 00:51:38 2023 +0100| [4e377ec8dcd1e93be630b1e15815e935e47e55f9] | committer: Michael Niedermayer
avformat/wavdec: Check that smv block fits in available space
Fixes: OOM
Fixes: 56271/clusterfuzz-testcase-minimized-ffmpeg_dem_WAV_fuzzer-5290810045497344
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 a76efafdb9be966ae3ad52b32370dc644dd582bf)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4e377ec8dcd1e93be630b1e15815e935e47e55f9
---
libavformat/wavdec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index 4d2524f126..396ec30dab 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -647,6 +647,10 @@ smv_retry:
goto smv_out;
}
size = avio_rl24(s->pb);
+ if (size > wav->smv_block_size) {
+ ret = AVERROR_EOF;
+ goto smv_out;
+ }
ret = av_get_packet(s->pb, pkt, size);
if (ret < 0)
goto smv_out;
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