From: Florian Fainelli <f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Florian Fainelli
<f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Daniel Mack <zonque-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Grant Likely
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: [PATCH] of: handle NULL node in of_get_next_available_child
Date: Fri, 23 May 2014 12:43:11 -0700 [thread overview]
Message-ID: <1400874192-29400-1-git-send-email-f.fainelli@gmail.com> (raw)
Add an early check for the node argument in
of_get_next_available_child() to avoid dereferencing a NULL node pointer
a few lines after.
CC: Daniel Mack <zonque-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Signed-off-by: Florian Fainelli <f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
drivers/of/base.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index e67b308819c9..9a71bfac78ae 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -746,6 +746,9 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
struct device_node *next;
unsigned long flags;
+ if (!node)
+ return NULL;
+
raw_spin_lock_irqsave(&devtree_lock, flags);
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling) {
--
1.9.1
--
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next reply other threads:[~2014-05-23 19:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-23 19:43 Florian Fainelli [this message]
[not found] ` <1400874192-29400-1-git-send-email-f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-05-27 11:19 ` [PATCH] of: handle NULL node in of_get_next_available_child Grant Likely
[not found] ` <20140527111930.696AAC4156C-WNowdnHR2B42iJbIjFUEsiwD8/FfD2ys@public.gmane.org>
2014-05-27 17:36 ` Florian Fainelli
[not found] ` <CAGVrzcYKCGXbOR1FRaOLxjPeaFEq6skgUvG_i4nqGSdJBUZRqQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-27 20:17 ` Grant Likely
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