linux-kernel - [PATCH v2] misc: xilinx_sdfec: add missing _

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Message-Id: <20191209213719.58037-1-luc.vanoostenryck@gmail.com>
Date:   Mon,  9 Dec 2019 22:37:19 +0100
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>
Subject: [PATCH v2] misc: xilinx_sdfec: add missing __user annotation

The second arg of xsdfec_set_order() is a 'void __user *'
and this pointer is then used in get_user() which expect
a __user pointer.

But get_user() can't be used with a void pointer, it a
pointer to the effective type. This is done here by casting
the argument to a pointer to the effective type but the
__user is missing in the cast.

Fix this by adding the missing __user in the cast.

CC: Derek Kiernan <derek.kiernan@...inx.com>
CC: Dragan Cvetic <dragan.cvetic@...inx.com>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Acked-by: Dragan Cvetic <dragan.cvetic@...inx.com>
---

Greg,

Can you take this in your tree?
Thanks.

Change since v1:
- add Dragan's ack.


 drivers/misc/xilinx_sdfec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index 11835969e982..f05e1b4c2826 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -733,7 +733,7 @@ static int xsdfec_set_order(struct xsdfec_dev *xsdfec, void __user *arg)
 	enum xsdfec_order order;
 	int err;
 
-	err = get_user(order, (enum xsdfec_order *)arg);
+	err = get_user(order, (enum xsdfec_order __user *)arg);
 	if (err)
 		return -EFAULT;
 
-- 
2.24.0