diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
index 94ff58c..896863f 100644
--- a/arch/sparc/kernel/sys_sparc.c
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -470,19 +470,21 @@
 {
  	int nlen, err;
  	
-	if (len < 0 || len > __NEW_UTS_LEN)
+	if (len < 0)
 		return -EINVAL;
 
  	down_read(&uts_sem);
  	
 	nlen = strlen(system_utsname.domainname) + 1;
-	if (nlen < len)
-		len = nlen;
+	err = -EINVAL;
+	if (nlen > len)
+		goto out;
 
 	err = -EFAULT;
-	if (!copy_to_user(name, system_utsname.domainname, len))
+	if (!copy_to_user(name, system_utsname.domainname, nlen))
 		err = 0;
 
+out:
 	up_read(&uts_sem);
 	return err;
 }
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index bf5f14e..c608c94 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -707,19 +707,21 @@
 {
         int nlen, err;
 
-	if (len < 0 || len > __NEW_UTS_LEN)
+	if (len < 0)
 		return -EINVAL;
 
  	down_read(&uts_sem);
  	
 	nlen = strlen(system_utsname.domainname) + 1;
-        if (nlen < len)
-                len = nlen;
+	err = -EINVAL;
+	if (nlen > len)
+		goto out;
 
 	err = -EFAULT;
-	if (!copy_to_user(name, system_utsname.domainname, len))
+	if (!copy_to_user(name, system_utsname.domainname, nlen))
 		err = 0;
 
+out:
 	up_read(&uts_sem);
 	return err;
 }
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c
index 293bb2f..2f69876 100644
--- a/drivers/sbus/char/openprom.c
+++ b/drivers/sbus/char/openprom.c
@@ -145,8 +145,9 @@
 	void *pval;
 	int len;
 
-	pval = of_get_property(dp, op->oprom_array, &len);
-	if (!pval || len <= 0 || len > bufsize)
+	if (!dp ||
+	    !(pval = of_get_property(dp, op->oprom_array, &len)) ||
+	    len <= 0 || len > bufsize)
 		return copyout(argp, op, sizeof(int));
 
 	memcpy(op->oprom_array, pval, len);
@@ -161,6 +162,8 @@
 	struct property *prop;
 	int len;
 
+	if (!dp)
+		return copyout(argp, op, sizeof(int));
 	if (op->oprom_array[0] == '\0') {
 		prop = dp->properties;
 		if (!prop)
@@ -266,9 +269,13 @@
 
 static int oprompath2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
 {
+	phandle ph = 0;
+
 	dp = of_find_node_by_path(op->oprom_array);
+	if (dp)
+		ph = dp->node;
 	data->current_node = dp;
-	*((int *)op->oprom_array) = dp->node;
+	*((int *)op->oprom_array) = ph;
 	op->oprom_size = sizeof(int);
 
 	return copyout(argp, op, bufsize + sizeof(int));