[FFmpeg-cvslog] avfilter/graphparser: Check allocations for success

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Aug 23 01:51:22 2020 +0200| [95b8df687cc0182a4ec7666c2bbc2826c9ef0852] | committer: Andreas Rheinhardt

avfilter/graphparser: Check allocations for success

parse_filter() did not check the return value of av_get_token() for
success; in case name (the name of a filter) was NULL, one got a
segfault in av_strlcpy() (called from create_filter()).

Reviewed-by: Nicolas George <george at nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=95b8df687cc0182a4ec7666c2bbc2826c9ef0852
---

 libavfilter/graphparser.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavfilter/graphparser.c b/libavfilter/graphparser.c
index e96b20418e..a52916a146 100644
--- a/libavfilter/graphparser.c
+++ b/libavfilter/graphparser.c
@@ -186,9 +186,16 @@ static int parse_filter(AVFilterContext **filt_ctx, const char **buf, AVFilterGr
     char *name = av_get_token(buf, "=,;[");
     int ret;
 
+    if (!name)
+        return AVERROR(ENOMEM);
+
     if (**buf == '=') {
         (*buf)++;
         opts = av_get_token(buf, "[],;");
+        if (!opts) {
+            av_free(name);
+            return AVERROR(ENOMEM);
+        }
     }
 
     ret = create_filter(filt_ctx, graph, index, name, opts, log_ctx);