kvm: properly check debugfs dentry before using it

[mirror_ubuntu-bionic-kernel.git] / virt / kvm / kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 79ed514e32bdf0c9488b4062cd1312946e6c1ecb..50a9eb1b62f449a34b1298d5ac1a0d26f7be6220 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3986,7 +3986,7 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm)
        }
        add_uevent_var(env, "PID=%d", kvm->userspace_pid);
 
-       if (kvm->debugfs_dentry) {
+       if (!IS_ERR_OR_NULL(kvm->debugfs_dentry)) {
                char *tmp, *p = kmalloc(PATH_MAX, GFP_KERNEL);
 
                if (p) {