strncpy only ensures that one does not write beyond the end of the destination buffer; in case of truncation it does not zero-terminate the destination buffer. This makes using it the way it is now in the DASH demuxer dangerous. So use av_strlcpy instead.
Also don't write anything if there is no id: The buffer has already been zeroed initially. The DASH testset from the Universität Klagenfurt contains samples with ids that are too long. E.g. http://ftp.itec.aau.at/datasets/DASHDataset2014/TearsOfSteel/1sec/TearsOfSteel_1s_simple_2014_05_09.mpd Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com> --- libavformat/dashdec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c index b82805c9ce..3a12aefa68 100644 --- a/libavformat/dashdec.c +++ b/libavformat/dashdec.c @@ -1042,7 +1042,8 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url, if (rep->fragment_duration > 0 && !rep->fragment_timescale) rep->fragment_timescale = 1; rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0; - strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id)); + if (rep_id_val) + av_strlcpy(rep->id, rep_id_val, sizeof(rep->id)); rep->framerate = av_make_q(0, 0); if (type == AVMEDIA_TYPE_VIDEO) { char *rep_framerate_val = xmlGetProp(representation_node, "frameRate"); -- 2.27.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
