linux-kernel - [124/200] fs/compat_rw_copy_check_uvector: add missing compat

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Message-Id: <20100701174256.889898736@clark.site>
Date:	Thu, 01 Jul 2010 10:43:34 -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,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [124/200] fs/compat_rw_copy_check_uvector: add missing compat_ptr call

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

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

From: Heiko Carstens <heiko.carstens@...ibm.com>

commit 7cbe17701a0379c7b05a79a6df4f24e41d2afde8 upstream.

A call to access_ok is missing a compat_ptr conversion.  Introduced with
b83733639a494d5f42fa00a2506563fbd2d3015d "compat: factor out
compat_rw_copy_check_uvector from compat_do_readv_writev"

fs/compat.c: In function 'compat_rw_copy_check_uvector':
fs/compat.c:629: warning: passing argument 1 of '__access_ok' makes pointer from integer without a cast

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Reviewed-by: Jeff Moyer <jmoyer@...hat.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

--- a/fs/compat.c
+++ b/fs/compat.c
@@ -626,7 +626,7 @@ ssize_t compat_rw_copy_check_uvector(int
 		tot_len += len;
 		if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
 			goto out;
-		if (!access_ok(vrfy_dir(type), buf, len)) {
+		if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
 			ret = -EFAULT;
 			goto out;
 		}


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