linux-kernel - [PATCH] of: avoid format string parsing in kobject names

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Date:	Tue, 10 Jun 2014 09:57:00 -0700
From:	Kees Cook <keescook@...omium.org>
To:	linux-kernel@...r.kernel.org
Cc:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: [PATCH] of: avoid format string parsing in kobject names

This makes sure a format string cannot leak into the kobject name that
is constructed. (And splits the >80 character line.)

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/of/base.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 8368d96ae7b4..f27d922eaece 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -227,7 +227,8 @@ static int __of_node_add(struct device_node *np)
 	np->kobj.kset = of_kset;
 	if (!np->parent) {
 		/* Nodes without parents are new top level trees */
-		rc = kobject_add(&np->kobj, NULL, safe_name(&of_kset->kobj, "base"));
+		rc = kobject_add(&np->kobj, NULL, "%s",
+				 safe_name(&of_kset->kobj, "base"));
 	} else {
 		name = safe_name(&np->parent->kobj, kbasename(np->full_name));
 		if (!name || !name[0])
-- 
1.7.9.5


-- 
Kees Cook
Chrome OS Security
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