[FFmpeg-cvslog] avformat/mxfdec: Check count in mxf_read_strong_ref_array()
Michael Niedermayer
git at videolan.org
Mon Mar 21 23:27:39 EET 2022
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Mar 13 00:34:52 2022 +0100| [3015c556f316d4ab364ed55e8bc97cc0f2cc57a3] | committer: Michael Niedermayer
avformat/mxfdec: Check count in mxf_read_strong_ref_array()
Reviewed-by: Tomas Härdin <tjoppen at acc.umu.se>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3015c556f316d4ab364ed55e8bc97cc0f2cc57a3
---
libavformat/mxfdec.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index a32c1c55a4..a858bbb7be 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -933,7 +933,13 @@ static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, i
static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
{
- *count = avio_rb32(pb);
+ unsigned c = avio_rb32(pb);
+
+ //avio_read() used int
+ if (c > INT_MAX / sizeof(UID))
+ return AVERROR_PATCHWELCOME;
+ *count = c;
+
av_free(*refs);
*refs = av_calloc(*count, sizeof(UID));
if (!*refs) {
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