linux-kernel - [PATCH 01/12] software node: Prevent potential NULL Pointer Dereference

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Date:   Fri, 15 Mar 2019 19:57:49 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        platform-driver-x86@...r.kernel.org
Subject: [PATCH 01/12] software node: Prevent potential NULL Pointer Dereference

Software nodes are not forced to have device properties.
Adding check to property_entries_dup() to make it possible
to create software nodes that don't have any properties.

Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
 drivers/base/swnode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 1fad9291f6aa..3a50a8edd3d3 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -383,6 +383,9 @@ property_entries_dup(const struct property_entry *properties)
 	int i, n = 0;
 	int ret;
 
+	if (!properties)
+		return NULL;
+
 	while (properties[n].name)
 		n++;
 
-- 
2.20.1