HID: roccat: fix NULL pointer dereference, add range checks

On rare occassions raw events can be triggered before drvdata gets set up
which leads to NULL pointer dereferences. This was only observed with pyra on
2.6.39, but is fixed for all devices now to play it save.
kovaplus returned wrong actual values when profile change was initiated from host.
Added range checks for setting actual profile on all devices.
Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-roccat-arvo.c

@@ -163,6 +163,9 @@ static ssize_t arvo_sysfs_set_actual_profile(struct device *dev,
 	if (retval)
 		return retval;
 
+	if (profile < 1 || profile > 5)
+		return -EINVAL;
+
 	temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
 	temp_buf.actual_profile = profile;
 
@@ -399,7 +402,7 @@ static int arvo_raw_event(struct hid_device *hdev,
 	if (size != 3)
 		return 0;
 
-	if (arvo->roccat_claimed)
+	if (arvo && arvo->roccat_claimed)
 		arvo_report_to_chrdev(arvo, data);
 
 	return 0;

drivers/hid/hid-roccat-kone.c

@@ -832,6 +832,9 @@ static int kone_raw_event(struct hid_device *hdev, struct hid_report *report,
 	if (size != sizeof(struct kone_mouse_event))
 		return 0;
 
+	if (kone == NULL)
+		return 0;
+
 	/*
 	 * Firmware 1.38 introduced new behaviour for tilt and special buttons.
 	 * Pressed button is reported in each movement event.

drivers/hid/hid-roccat-koneplus.c

@@ -431,6 +431,9 @@ static ssize_t koneplus_sysfs_set_actual_profile(struct device *dev,
 	if (retval)
 		return retval;
 
+	if (profile > 4)
+		return -EINVAL;
+
 	mutex_lock(&koneplus->koneplus_lock);
 
 	retval = koneplus_set_actual_profile(usb_dev, profile);
@@ -439,7 +442,7 @@ static ssize_t koneplus_sysfs_set_actual_profile(struct device *dev,
 		return retval;
 	}
 
-	koneplus->actual_profile = profile;
+	koneplus_profile_activated(koneplus, profile);
 
 	roccat_report.type = KONEPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE;
 	roccat_report.data1 = profile + 1;
@@ -751,6 +754,9 @@ static int koneplus_raw_event(struct hid_device *hdev,
 			!= USB_INTERFACE_PROTOCOL_MOUSE)
 		return 0;
 
+	if (koneplus == NULL)
+		return 0;
+
 	koneplus_keep_values_up_to_date(koneplus, data);
 
 	if (koneplus->roccat_claimed)

drivers/hid/hid-roccat-kovaplus.c

@@ -337,7 +337,7 @@ static ssize_t kovaplus_sysfs_set_actual_profile(struct device *dev,
 
 	mutex_lock(&kovaplus->kovaplus_lock);
 	retval = kovaplus_set_actual_profile(usb_dev, profile);
-	kovaplus->actual_profile = profile;
+	kovaplus_profile_activated(kovaplus, profile);
 	mutex_unlock(&kovaplus->kovaplus_lock);
 	if (retval)
 		return retval;
@@ -662,6 +662,9 @@ static int kovaplus_raw_event(struct hid_device *hdev,
 			!= USB_INTERFACE_PROTOCOL_MOUSE)
 		return 0;
 
+	if (kovaplus == NULL)
+		return 0;
+
 	kovaplus_keep_values_up_to_date(kovaplus, data);
 
 	if (kovaplus->roccat_claimed)

drivers/hid/hid-roccat-pyra.c

@@ -637,6 +637,9 @@ static int pyra_raw_event(struct hid_device *hdev, struct hid_report *report,
 			!= USB_INTERFACE_PROTOCOL_MOUSE)
 		return 0;
 
+	if (pyra == NULL)
+		return 0;
+
 	pyra_keep_values_up_to_date(pyra, data);
 
 	if (pyra->roccat_claimed)