[PATCH -tip] KVM: SVM: nested: Initialize on-stack pointers in svm_set_nested_state()

[Joerg Roedel <joro@8bytes.org>]

From: Joerg Roedel <jroedel@suse.de>

The save and ctl pointers need to be initialized to NULL because there
is a way through the function in which there is no memory allocated
for the pointers but where they are freed in the end.

This involves the 'goto out_set_gif' before the memory for the
pointers is allocated.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 6ccbd29ade0d ("KVM: SVM: nested: Don't allocate VMCB structures on stack")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 arch/x86/kvm/svm/nested.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 598a769f1961..72a3d6f87107 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -1062,8 +1062,8 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
 	struct vmcb *hsave = svm->nested.hsave;
 	struct vmcb __user *user_vmcb = (struct vmcb __user *)
 		&user_kvm_nested_state->data.svm[0];
-	struct vmcb_control_area *ctl;
-	struct vmcb_save_area *save;
+	struct vmcb_control_area *ctl = NULL;
+	struct vmcb_save_area *save = NULL;
 	int ret;
 	u32 cr0;
 
-- 
2.28.0