[FFmpeg-cvslog] avfilter/avf_showfreqs: fix memleak in plot_freqs

[Steven Liu]

ffmpeg | branch: master | Steven Liu <lq at chinaffmpeg.org> | Fri May 13 10:19:24 2022 +0800| [90007e0b4e1b92674097dcc897a29bf8cb49cc3e] | committer: Steven Liu

avfilter/avf_showfreqs: fix memleak in plot_freqs

plot_freqs should free colors before return error when
ff_get_video_buffer failed

Signed-off-by: Steven Liu <lq at chinaffmpeg.org>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=90007e0b4e1b92674097dcc897a29bf8cb49cc3e
---

 libavfilter/avf_showfreqs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavfilter/avf_showfreqs.c b/libavfilter/avf_showfreqs.c
index 6dcff686b6..86a67c7328 100644
--- a/libavfilter/avf_showfreqs.c
+++ b/libavfilter/avf_showfreqs.c
@@ -421,8 +421,10 @@ static int plot_freqs(AVFilterLink *inlink, int64_t pts)
         return AVERROR(ENOMEM);
 
     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
-    if (!out)
+    if (!out) {
+        av_free(colors);
         return AVERROR(ENOMEM);
+    }
 
     for (n = 0; n < outlink->h; n++)
         memset(out->data[0] + out->linesize[0] * n, 0, outlink->w * 4);