[FFmpeg-cvslog] avfilter/buffersink: don't leak the reallocated channel layouts array

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Wed Jan  1 19:39:34 2025 -0300| [041a6c36142f89addf2bc850f5bd27a089d900f5] | committer: James Almer

avfilter/buffersink: don't leak the reallocated channel layouts array

And ensure the last element is the zeroed terminator.

Fixes ticket #11392.

Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=041a6c36142f89addf2bc850f5bd27a089d900f5
---

 libavfilter/buffersink.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavfilter/buffersink.c b/libavfilter/buffersink.c
index b0bcc26432..565d084ddf 100644
--- a/libavfilter/buffersink.c
+++ b/libavfilter/buffersink.c
@@ -205,8 +205,9 @@ static av_cold int common_init(AVFilterContext *ctx)
                 if (!tmp)
                     return AVERROR(ENOMEM);
 
+                buf->channel_layouts = tmp;
                 memset(&buf->channel_layouts[buf->nb_channel_layouts], 0,
-                       sizeof(*buf->channel_layouts));
+                       sizeof(*buf->channel_layouts) * 2);
                 buf->nb_channel_layouts++;
 
                 ret = av_channel_layout_from_string(&buf->channel_layouts[buf->nb_channel_layouts - 1], cur);