[FFmpeg-cvslog] avcodec/vvc/refs: Check content_ref in set_pict_type()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Feb  2 22:17:21 2025 +0100| [a50d36b5fd3914795f470abefcd37699b23bc8d4] | committer: Nuo Mi

avcodec/vvc/refs: Check content_ref in set_pict_type()

Fixes: 390565846/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VVC_fuzzer-4990028521996288
Fixes: Null pointer dereference

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a50d36b5fd3914795f470abefcd37699b23bc8d4
---

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

diff --git a/libavcodec/vvc/refs.c b/libavcodec/vvc/refs.c
index 486515d06d..1cfca48204 100644
--- a/libavcodec/vvc/refs.c
+++ b/libavcodec/vvc/refs.c
@@ -186,7 +186,7 @@ static void set_pict_type(AVFrame *frame, const VVCContext *s, const VVCFrameCon
         const CodedBitstreamFragment *current = &s->current_frame;
         for (int i = 0; i < current->nb_units && !has_b; i++) {
             const CodedBitstreamUnit *unit = current->units + i;
-            if (unit->type <= VVC_RSV_IRAP_11) {
+            if (unit->content_ref && unit->type <= VVC_RSV_IRAP_11) {
                 const H266RawSliceHeader *rsh = unit->content_ref;
                 has_inter |= !IS_I(rsh);
                 has_b     |= IS_B(rsh);