[FFmpeg-devel] [PATCH 44/49] avcodec/rkmppdec: Fix double-free on error

[Andreas Rheinhardt]

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>
---
I hope we have a maintainer (or anyone else) for this who can test
these patches.

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

diff --git a/libavcodec/rkmppdec.c b/libavcodec/rkmppdec.c
index 5768568b00..2ca368e0a9 100644
--- a/libavcodec/rkmppdec.c
+++ b/libavcodec/rkmppdec.c
@@ -462,8 +462,8 @@ 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;
-- 
2.34.1