From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 13 Jul 2017 10:38:49 +0300
Subject: KVM: PPC: e500mc: Fix a NULL dereference
Patch-mainline: v4.14-rc1
Git-commit: 50a1a25987146c5ab15d6c1642a5043730ace0a5
References: bsc#1077761

We should set "err = -ENOMEM;", otherwise it means we're returning
ERR_PTR(0) which is NULL.  It results in a NULL pointer dereference in
the caller.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Acked-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kvm/e500mc.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/powerpc/kvm/e500mc.c
+++ b/arch/powerpc/kvm/e500mc.c
@@ -331,8 +331,10 @@
 		goto uninit_vcpu;
 
 	vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
-	if (!vcpu->arch.shared)
+	if (!vcpu->arch.shared) {
+		err = -ENOMEM;
 		goto uninit_tlb;
+	}
 
 	return vcpu;