From f116f0999e2ce5710b1a368e47cf81a1ca3561ec Mon Sep 17 00:00:00 2001
From: thartmann <unknown>
Date: Mon, 22 May 2017 09:17:32 +0200
Subject: [PATCH] 8180511: Null pointer dereference in Matcher::ReduceInst()
 Summary: Fixed a missing null check on the return value of
 MachNodeGenerator() found by Parfait. Reviewed-by: kvn

---
 src/share/vm/opto/matcher.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/share/vm/opto/matcher.cpp b/src/share/vm/opto/matcher.cpp
index f4097b35e..c01785a8d 100644
--- a/src/share/vm/opto/matcher.cpp
+++ b/src/share/vm/opto/matcher.cpp
@@ -1657,6 +1657,7 @@ MachNode *Matcher::ReduceInst( State *s, int rule, Node *&mem ) {
 
   // Build the object to represent this state & prepare for recursive calls
   MachNode *mach = s->MachNodeGenerator( rule, C );
+  guarantee(mach != NULL, "Missing MachNode");
   mach->_opnds[0] = s->MachOperGenerator( _reduceOp[rule], C );
   assert( mach->_opnds[0] != NULL, "Missing result operand" );
   Node *leaf = s->_leaf;
-- 
GitLab