[FFmpeg-cvslog] avfilter/vf_signature: use av_strlcpy()

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Fri Mar 30 02:16:31 2018 +0200| [49336482fd04541623e9418264644dd80640dbfe] | committer: Michael Niedermayer

avfilter/vf_signature: use av_strlcpy()

Fixes: out of array access

Found-by: Kira <kira_cxy at foxmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 35eeff30caf34df835206f1c12bcf4b7c2bd6758)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=49336482fd04541623e9418264644dd80640dbfe
---

 libavfilter/vf_signature.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_signature.c b/libavfilter/vf_signature.c
index 06b1b910d4..3b117e7735 100644
--- a/libavfilter/vf_signature.c
+++ b/libavfilter/vf_signature.c
@@ -573,7 +573,8 @@ static int export(AVFilterContext *ctx, StreamContext *sc, int input)
         /* error already handled */
         av_assert0(av_get_frame_filename(filename, sizeof(filename), sic->filename, input) == 0);
     } else {
-        strcpy(filename, sic->filename);
+        if (av_strlcpy(filename, sic->filename, sizeof(filename)) >= sizeof(filename))
+            return AVERROR(EINVAL);
     }
     if (sic->format == FORMAT_XML) {
         return xml_export(ctx, sc, filename);