linux-kernel - [053/105] Input: synaptics - fix crash in synaptics_module

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Message-Id: <20110412143553.645713950@clark.kroah.org>
Date:	Tue, 12 Apr 2011 07:34:42 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jan Beulich <jbeulich@...ell.com>,
	Dmitry Torokhov <dtor@...l.ru>
Subject: [053/105] Input: synaptics - fix crash in synaptics_module_init()

2.6.38-stable review patch.  If anyone has any objections, please let us know.

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

From: Jan Beulich <JBeulich@...ell.com>

commit 708748670c7c6dd5bd3b141473086e6937e72737 upstream.

'struct dmi_system_id' arrays must always have a terminator to keep
dmi_check_system() from looking at data (and possibly crashing) it
isn't supposed to look at.

The issue went unnoticed until ef8313bb1a22e7d2125d9d758aa8a81f1de91d81,
but was introduced about a year earlier with
7705d548cbe33f18ea7713b9a07aa11047aaeca4 (which also similarly changed
lifebook.c, but the problem there got eliminated shortly afterwards).

The first hunk therefore is a stable candidate back to 2.6.33, while
the full change is needed only on 2.6.38.

Signed-off-by: Jan Beulich <jbeulich@...ell.com>
Signed-off-by: Dmitry Torokhov <dtor@...l.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/input/mouse/synaptics.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -836,8 +836,8 @@ static const struct dmi_system_id __init
 		},
 
 	},
-	{ }
 #endif
+	{ }
 };
 
 static bool broken_olpc_ec;
@@ -851,8 +851,8 @@ static const struct dmi_system_id __init
 			DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
 		},
 	},
-	{ }
 #endif
+	{ }
 };
 
 void __init synaptics_module_init(void)


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