KVM: release anon file in failure path of vm creation

The failure of create debugfs of VM will return directly without release
the anon file. It will leak memory and file descriptors, even through
be not serious.

Signed-off-by: Liu Shuo <[email protected]>
Fixes: 536a6f8
Signed-off-by: Paolo Bonzini <[email protected]>

Author: Liu Shuo

virt/kvm/kvm_main.c

@@ -49,6 +49,7 @@
 #include <linux/slab.h>
 #include <linux/sort.h>
 #include <linux/bsearch.h>
+#include <linux/syscalls.h>
 
 #include <asm/processor.h>
 #include <asm/io.h>
@@ -3069,6 +3070,7 @@ static int kvm_dev_ioctl_create_vm(unsigned long type)
 
 	if (kvm_create_vm_debugfs(kvm, r) < 0) {
 		kvm_put_kvm(kvm);
+		sys_close(r);
 		return -ENOMEM;
 	}