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From: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
To: Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
	Sricharan R <r.sricharan-l0cyMroinI0@public.gmane.org>
Cc: Grant Likely
	<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [patch] irqchip/irq-crossbar: not allocating enough memory
Date: Thu, 3 Apr 2014 10:21:34 +0300	[thread overview]
Message-ID: <20140403072134.GA14286@mwanda> (raw)

We are allocating the size of a pointer and not the size of the data.
This will lead to memory corruption.

There isn't actually a "cb_device" struct, btw.  The code is only able
to compile because GCC knows that all pointers are the same size.

Fixes: 96ca848ef7ea ('DRIVERS: IRQCHIP: CROSSBAR: Add support for Crossbar IP')
Signed-off-by: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>

diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index fc817d2..3d15d16 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -107,7 +107,7 @@ static int __init crossbar_of_init(struct device_node *node)
 	int i, size, max, reserved = 0, entry;
 	const __be32 *irqsr;
 
-	cb = kzalloc(sizeof(struct cb_device *), GFP_KERNEL);
+	cb = kzalloc(sizeof(*cb), GFP_KERNEL);
 
 	if (!cb)
 		return -ENOMEM;
--
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             reply	other threads:[~2014-04-03  7:21 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-03  7:21 Dan Carpenter [this message]
2014-04-04  6:30 ` [patch] irqchip/irq-crossbar: not allocating enough memory Sricharan R

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