linux-kernel - [ 143/149] lockd: fix arg parsing for grace

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Message-Id: <20120330194903.632474928@linuxfoundation.org>
Date:	Fri, 30 Mar 2012 12:50:56 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, NeilBrown <neilb@...e.de>,
	"J. Bruce Fields" <bfields@...hat.com>
Subject: [ 143/149] lockd: fix arg parsing for grace_period and timeout.

3.2-stable review patch.  If anyone has any objections, please let me know.

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

From: NeilBrown <neilb@...e.de>

commit de5b8e8e047534aac6bc9803f96e7257436aef9c upstream.

If you try to set grace_period or timeout via a module parameter
to lockd, and do this on a big-endian machine where

   sizeof(int) != sizeof(unsigned long)

it won't work.  This number given will be effectively shifted right
by the difference in those two sizes.

So cast kp->arg properly to get correct result.

Signed-off-by: NeilBrown <neilb@...e.de>
Signed-off-by: J. Bruce Fields <bfields@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/lockd/svc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -440,7 +440,7 @@ static int param_set_##name(const char *
 	__typeof__(type) num = which_strtol(val, &endp, 0);		\
 	if (endp == val || *endp || num < (min) || num > (max))		\
 		return -EINVAL;						\
-	*((int *) kp->arg) = num;					\
+	*((type *) kp->arg) = num;					\
 	return 0;							\
 }
 


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