linux-kernel - [PATCH 3.13 088/151] clk: s2mps11: Fix possible NULL pointer dereference

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Message-Id: <1399045139-4531-89-git-send-email-kamal@canonical.com>
Date:	Fri,  2 May 2014 08:37:56 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Mike Turquette <mturquette@...aro.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 088/151] clk: s2mps11: Fix possible NULL pointer dereference

3.13.11.1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Krzysztof Kozlowski <k.kozlowski@...sung.com>

commit 238e14055da87d0d012257788e39fe0df3a82226 upstream.

If parent device does not have of_node set the s2mps11_clk_parse_dt()
returned NULL. This NULL was later passed to of_clk_add_provider() which
dereferenced it in pr_debug() call.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Signed-off-by: Mike Turquette <mturquette@...aro.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/clk/clk-s2mps11.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
index 00a3abe..27c83e4 100644
--- a/drivers/clk/clk-s2mps11.c
+++ b/drivers/clk/clk-s2mps11.c
@@ -130,7 +130,7 @@ static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev)
 	int i;
 
 	if (!iodev->dev->of_node)
-		return NULL;
+		return ERR_PTR(-EINVAL);
 
 	clk_np = of_find_node_by_name(iodev->dev->of_node, "clocks");
 	if (!clk_np) {
-- 
1.9.1

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