[FFmpeg-cvslog] avcodec/h264_refs: fix null pointer dereference with -DTRACE

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Mar 31 01:57:00 2015 +0200| [a38758a97efe9c2de48b5429fd2fdebd55ba6a64] | committer: Michael Niedermayer

avcodec/h264_refs: fix null pointer dereference with -DTRACE

Found-by: carl
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a38758a97efe9c2de48b5429fd2fdebd55ba6a64
---

 libavcodec/h264_refs.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/h264_refs.c b/libavcodec/h264_refs.c
index 27619d9..3519870 100644
--- a/libavcodec/h264_refs.c
+++ b/libavcodec/h264_refs.c
@@ -175,16 +175,16 @@ int ff_h264_fill_default_ref_list(H264Context *h, H264SliceContext *sl)
 #ifdef TRACE
     for (i = 0; i < sl->ref_count[0]; i++) {
         tprintf(h->avctx, "List0: %s fn:%d 0x%p\n",
-                (h->default_ref_list[0][i].parent->long_ref ? "LT" : "ST"),
+                h->default_ref_list[0][i].parent ? (h->default_ref_list[0][i].parent->long_ref ? "LT" : "ST") : "NULL",
                 h->default_ref_list[0][i].pic_id,
-                h->default_ref_list[0][i].parent->f.data[0]);
+                h->default_ref_list[0][i].parent ? h->default_ref_list[0][i].parent->f.data[0] : 0);
     }
     if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
         for (i = 0; i < sl->ref_count[1]; i++) {
             tprintf(h->avctx, "List1: %s fn:%d 0x%p\n",
-                    (h->default_ref_list[1][i].parent->long_ref ? "LT" : "ST"),
+                    h->default_ref_list[1][i].parent ? (h->default_ref_list[1][i].parent->long_ref ? "LT" : "ST") : "NULL",
                     h->default_ref_list[1][i].pic_id,
-                    h->default_ref_list[1][i].parent->f.data[0]);
+                    h->default_ref_list[1][i].parent ? h->default_ref_list[1][i].parent->f.data[0] : 0);
         }
     }
 #endif