[FFmpeg-cvslog] avcodec/hevc_refs: Check nb_refs in add_candidate_ref()

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Thu Jun 15 01:26:01 2017 +0200| [8d0c353b733bb36919b7c2ec7ae92d75d28196ed] | committer: Michael Niedermayer

avcodec/hevc_refs: Check nb_refs in add_candidate_ref()

Fixes: runtime error: index 16 out of bounds for type 'int [16]'
Fixes: 2209/clusterfuzz-testcase-minimized-5012343912136704

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 1cb4ef526dd1e5f547d0354efb0831d07e967919)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8d0c353b733bb36919b7c2ec7ae92d75d28196ed
---

 libavcodec/hevc_refs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/hevc_refs.c b/libavcodec/hevc_refs.c
index 611ad458de..df52e401ad 100644
--- a/libavcodec/hevc_refs.c
+++ b/libavcodec/hevc_refs.c
@@ -438,7 +438,7 @@ static int add_candidate_ref(HEVCContext *s, RefPicList *list,
 {
     HEVCFrame *ref = find_ref_idx(s, poc);
 
-    if (ref == s->ref)
+    if (ref == s->ref || list->nb_refs >= MAX_REFS)
         return AVERROR_INVALIDDATA;
 
     if (!ref) {