[FFmpeg-cvslog] avcodec/rkmppdec: Fix double-free on error

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sun Sep 24 13:15:48 2023 +0200| [4513300989502090c4fd6560544dce399a8cd53c] | committer: Andreas Rheinhardt

avcodec/rkmppdec: Fix double-free on error

After having created the AVBuffer that is put into frame->buf[0],
ownership of several objects (namely an AVDRMFrameDescriptor,
an MppFrame and some AVBufferRefs framecontextref and decoder_ref)
has passed to the AVBuffer and therefore to the frame.
Yet it has nevertheless been freed manually on error
afterwards, which would lead to a double-free as soon
as the AVFrame is unreferenced.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4513300989502090c4fd6560544dce399a8cd53c
---

 libavcodec/rkmppdec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/rkmppdec.c b/libavcodec/rkmppdec.c
index 7665098c6a..6889545b20 100644
--- a/libavcodec/rkmppdec.c
+++ b/libavcodec/rkmppdec.c
@@ -463,8 +463,8 @@ static int rkmpp_retrieve_frame(AVCodecContext *avctx, AVFrame *frame)
 
             frame->hw_frames_ctx = av_buffer_ref(decoder->frames_ref);
             if (!frame->hw_frames_ctx) {
-                ret = AVERROR(ENOMEM);
-                goto fail;
+                av_frame_unref(frame);
+                return AVERROR(ENOMEM);
             }
 
             return 0;