linux-kernel - [PATCH] Input: psmouse - fix attribute access on 64-bit systems

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Date:	Tue,  7 Nov 2006 20:02:36 +0300
From:	Sergey Vlasov <vsu@...linux.ru>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org,
	stable@...nel.org, Sergey Vlasov <vsu@...linux.ru>
Subject: [PATCH] Input: psmouse - fix attribute access on 64-bit systems

psmouse_show_int_attr() and psmouse_set_int_attr() were accessing
unsigned int fields as unsigned long, which gave garbage on x86_64.

Signed-off-by: Sergey Vlasov <vsu@...linux.ru>
---
 drivers/input/mouse/psmouse-base.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

 The problem was found in 2.6.18.2; the same patch applies to the
 current tree.

diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 343afa3..07b0604 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -1332,20 +1332,22 @@ ssize_t psmouse_attr_set_helper(struct d
 
 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
 {
-	unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
+	unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
 
-	return sprintf(buf, "%lu\n", *field);
+	return sprintf(buf, "%u\n", *field);
 }
 
 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
 {
-	unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
+	unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
 	unsigned long value;
 	char *rest;
 
 	value = simple_strtoul(buf, &rest, 10);
 	if (*rest)
 		return -EINVAL;
+	if ((unsigned int)value != value)
+		return -EINVAL;
 
 	*field = value;
 
-- 
1.4.3.3.gddcc6

-
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