linux-kernel - [PATCH] fw-cdev _

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Message-Id: <E1Ih8IS-00041I-60@ZenIV.linux.org.uk>
Date:	Sun, 14 Oct 2007 19:34:40 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	torvalds@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, stefanr@...6.in-berlin.de
Subject: [PATCH] fw-cdev __user annotations


Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 drivers/firewire/fw-cdev.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index 7538864..0647130 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -722,10 +722,11 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
 		buffer_end = 0;
 	}
 
-	if (!access_ok(VERIFY_READ, request->packets, request->size))
+	p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets);
+
+	if (!access_ok(VERIFY_READ, p, request->size))
 		return -EFAULT;
 
-	p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets);
 	end = (void __user *)p + request->size;
 	count = 0;
 	while (p < end) {
-- 
1.5.3.GIT


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