[FFmpeg-cvslog] diracdec: check return code of get_buffer_with_edge

[Andreas Cadhalpun]

ffmpeg | branch: release/3.1 | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Fri Nov  4 19:00:17 2016 +0100| [cb0b8182448cd3888837f8c33cd8686ba0eb04a1] | committer: Andreas Cadhalpun

diracdec: check return code of get_buffer_with_edge

If it fails, buffers aren't allocated, causing NULL pointer dereferencing.

Reviewed-by: Rostislav Pehlivanov <atomnuker at gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
(cherry picked from commit db79dedb1ae5dd38432eee3f09155e26f3f2d95a)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cb0b8182448cd3888837f8c33cd8686ba0eb04a1
---

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

diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c
index 769dac3..357da97 100644
--- a/libavcodec/diracdec.c
+++ b/libavcodec/diracdec.c
@@ -1900,7 +1900,9 @@ static int dirac_decode_picture_header(DiracContext *s)
             for (j = 0; j < MAX_FRAMES; j++)
                 if (!s->all_frames[j].avframe->data[0]) {
                     s->ref_pics[i] = &s->all_frames[j];
-                    get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
+                    ret = get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
+                    if (ret < 0)
+                        return ret;
                     break;
                 }