From c8875a2db954dbbacab8c1fc2d49321a5a6e0511 Mon Sep 17 00:00:00 2001
From: Johnson Ding <johnson.ding@rock-chips.com>
Date: Fri, 4 Jan 2019 17:32:44 +0800
Subject: [PATCH] [mpp]: avoid crash when dumping a frame whose fd is -1

Change-Id: I6c7252ac32a4b857a79a4203fdaa56a2f0443645
Signed-off-by: Johnson Ding <johnson.ding@rock-chips.com>
---
 mpp/mpp_impl.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mpp/mpp_impl.cpp b/mpp/mpp_impl.cpp
index def84110..1238ccb0 100644
--- a/mpp/mpp_impl.cpp
+++ b/mpp/mpp_impl.cpp
@@ -324,6 +324,11 @@ MPP_RET mpp_ops_dec_get_frm(MppDump info, MppFrame frame)
                 info_change, error, discard, mpp_frame_get_pts(frame));
     }
 
+    if (NULL == buf || fd < 0) {
+        mpp_err("failed to dump frame\n");
+        return MPP_NOK;
+    }
+
     dump_frame(p->fp_out, frame, p->fp_buf, p->dump_width, p->dump_height);
 
     if (p->debug & MPP_DBG_DUMP_LOG) {