[FFmpeg-cvslog] lavf/webm_chunk: Respect buffer size

[Andreas Rheinhardt]

ffmpeg | branch: release/4.1 | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sat Apr 20 00:03:14 2019 +0200| [85578838cbc0d86baac9713b2cc47054e55d1a8e] | committer: Michael Niedermayer

lavf/webm_chunk: Respect buffer size

The last argument of av_strlcpy is supposed to contain the size of the
destination buffer, but it was filled with the size of the source
string, effectively negating its very purpose.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 73ef1f47f59333328264a968c8fbbcfb0bf0643f)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=85578838cbc0d86baac9713b2cc47054e55d1a8e
---

 libavformat/webm_chunk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/webm_chunk.c b/libavformat/webm_chunk.c
index 7ceb276fc4..f60696e3ad 100644
--- a/libavformat/webm_chunk.c
+++ b/libavformat/webm_chunk.c
@@ -96,7 +96,7 @@ static int get_chunk_filename(AVFormatContext *s, int is_header, char *filename)
             av_log(oc, AV_LOG_ERROR, "No header filename provided\n");
             return AVERROR(EINVAL);
         }
-        av_strlcpy(filename, wc->header_filename, strlen(wc->header_filename) + 1);
+        av_strlcpy(filename, wc->header_filename, MAX_FILENAME_SIZE);
     } else {
         if (av_get_frame_filename(filename, MAX_FILENAME_SIZE,
                                   s->url, wc->chunk_index - 1) < 0) {