shithub: openh264

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Fix ossz-buzz reported bug 13457. (Don't try to dereference never existing P referemece->reference.

--- a/codec/decoder/core/src/decoder.cpp

+++ b/codec/decoder/core/src/decoder.cpp

@@ -167,6 +167,9 @@

 static void ResetRefPicReferences (const PWelsDecoderContext& pCtx, const PPicture& inPPic) {

   //seach and reset the references of deleted references.

+  if (pCtx->eSliceType != B_SLICE) {

+    return;

+  }

   for (int32_t list = LIST_0; list < LIST_A; ++list) {

     int32_t refIdx = 0;

     PPicture pPic = pCtx->sRefPic.pRefList[list][refIdx];

--- a/codec/decoder/plus/src/welsDecoderExt.cpp

+++ b/codec/decoder/plus/src/welsDecoderExt.cpp

@@ -581,12 +581,6 @@

     eNalType = m_pDecContext->sCurNalHead.eNalUnitType;

-    if ((m_pDecContext->iErrorCode & dsRefLost) && m_pDecContext->eSliceType == B_SLICE) {

-      if (ResetDecoder()) {

-        return dsRefLost;

-      }

-      return dsErrorFree;

-    }

     if (m_pDecContext->iErrorCode & dsOutOfMemory) {

       if (ResetDecoder()) {

         return dsOutOfMemory;

-- 

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