[FFmpeg-cvslog] avformat/evcdec: Check that enough data has been read
Andreas Rheinhardt
git at videolan.org
Sun Jul 9 04:15:32 EEST 2023
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Thu Jul 6 22:48:55 2023 +0200| [e5ab2dab2c73710c753bf8a44171fc747625e9f3] | committer: Andreas Rheinhardt
avformat/evcdec: Check that enough data has been read
Fixes potential use of uninitialized values
in evc_read_nal_unit_length().
Reviewed-by: James Almer <jamrial at gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e5ab2dab2c73710c753bf8a44171fc747625e9f3
---
libavformat/evcdec.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/evcdec.c b/libavformat/evcdec.c
index 9e09f8d264..6cce174f46 100644
--- a/libavformat/evcdec.c
+++ b/libavformat/evcdec.c
@@ -162,6 +162,8 @@ static int evc_read_packet(AVFormatContext *s, AVPacket *pkt)
ret = avio_read(s->pb, buf, EVC_NALU_LENGTH_PREFIX_SIZE);
if (ret < 0)
return ret;
+ if (ret != EVC_NALU_LENGTH_PREFIX_SIZE)
+ return AVERROR_INVALIDDATA;
nalu_size = evc_read_nal_unit_length(buf, EVC_NALU_LENGTH_PREFIX_SIZE);
if (!nalu_size || nalu_size > INT_MAX)
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