demux_subreader: reject file if not opened by --sub

demux_subreader.c contains the old MPlayer subtitle parser, and I have
absolutely no confidence in this (very crappy) code. There might be
one or two security risks associated with running that code on
arbitrary input.

1 files changed, 1 insertions, 0 deletions

diff --git a/player/loadfile.c b/player/loadfile.c
index 14faeb08c9..f35c63fa38 100644
--- a/player/loadfile.c
+++ b/player/loadfile.c
@@ -776,6 +776,7 @@ static struct track *open_external_file(struct MPContext *mpctx, char *filename,
                                 opts->stream_cache_seek_min_percent);
     struct demuxer_params params = {
         .ass_library = mpctx->ass_library, // demux_libass requires it
+        .expect_subtitle = filter == STREAM_SUB,
     };
     struct demuxer *demuxer =
         demux_open(stream, demuxer_name, &params, mpctx->global);