[FFmpeg-cvslog] avformat/vividas: Check buffer size before allocation
Michael Niedermayer
git at videolan.org
Sat Aug 3 18:43:35 EEST 2019
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Jul 13 19:57:21 2019 +0200| [171286f6a4fa52ca4b915688ff7dce65d01f9aa5] | committer: Michael Niedermayer
avformat/vividas: Check buffer size before allocation
Fixes: out of array access
Fixes: 15365/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5716153105645568
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=171286f6a4fa52ca4b915688ff7dce65d01f9aa5
---
libavformat/vividas.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavformat/vividas.c b/libavformat/vividas.c
index c0d39f0a6f..184d24f374 100644
--- a/libavformat/vividas.c
+++ b/libavformat/vividas.c
@@ -251,6 +251,9 @@ static uint8_t *read_sb_block(AVIOContext *src, unsigned *size,
*key = tmpkey;
}
+ if (n < 8)
+ return NULL;
+
buf = av_malloc(n);
if (!buf)
return NULL;
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