commit 0b5d5efcc5bab51a840c3547772b0ccff2487654
author weizhu-intel <wei1.zhu@intel.com> Thu Mar 11 11:14:55 2021 +0800
committer Sherry Lin <sherry.lin@intel.com> Thu Mar 25 10:16:01 2021 +0800
tree fe936224352fdb1ab7b7c88934d33c64f98318e1
parent 8947b6830f10d60648eed887a487a796345d3372

fix KW issue.

check buf status before it is dereferenced.

media_driver/linux/common/codec/ddi/media_libva_decoder.cpp

diff --git a/media_driver/linux/common/codec/ddi/media_libva_decoder.cpp b/media_driver/linux/common/codec/ddi/media_libva_decoder.cpp
index 1a2f25a..3149b20 100644
--- a/media_driver/linux/common/codec/ddi/media_libva_decoder.cpp
+++ b/media_driver/linux/common/codec/ddi/media_libva_decoder.cpp
@@ -681,6 +681,12 @@
         if(pDecContext == decCtx)
         {
             DDI_MEDIA_BUFFER   *buf     = DdiMedia_GetBufferFromVABufferID(mediaCtx,  mediaBufferHeapElmt->uiVaBufferID);
+
+            if (nullptr == buf)
+            {
+                return;
+            }
+
             if(buf->uiType == VASliceDataBufferType ||
                 buf->uiType == VAProtectedSliceDataBufferType ||
                 buf->uiType == VASliceParameterBufferType)