[PATCH] kvm: Fix NULL dereference doing kvm_create_vm()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

If init_srcu_struct() or init_srcu_struct() fails then this function
returns ERR_PTR(0) which is NULL.  It leads to a NULL dereference in the
caller.

Fixes: 9121923c457d ("kvm: Allocate memslots and buses before calling kvm_arch_init_vm")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 virt/kvm/kvm_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d16d2054e937..91971811fa5f 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -675,6 +675,7 @@ static struct kvm *kvm_create_vm(unsigned long type)
 	INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
 #endif
 
+	r = -ENOMEM;
 	if (init_srcu_struct(&kvm->srcu))
 		goto out_err_no_srcu;
 	if (init_srcu_struct(&kvm->irq_srcu))
-- 
2.20.1