linux-kernel - [PATCH 1/4] initramfs: refactor clean

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Date:	Thu, 19 Aug 2010 12:37:41 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] initramfs: refactor clean_path()

first param, path, is used only on calling syscall routines which means it is
always considered as a user pointer. So add __user markup on parameter
declaration. And &st should be a user pointer also, mark it.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
---
 init/initramfs.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/init/initramfs.c b/init/initramfs.c
index d9c6e78..75a43c5 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -276,11 +276,12 @@ static int __init maybe_link(void)
 	return 0;
 }
 
-static void __init clean_path(char *path, mode_t mode)
+static void __init clean_path(char __user *path, mode_t mode)
 {
 	struct stat st;
 
-	if (!sys_newlstat(path, &st) && (st.st_mode^mode) & S_IFMT) {
+	if (!sys_newlstat(path, (struct stat __user __force *)&st) &&
+	    (st.st_mode^mode) & S_IFMT) {
 		if (S_ISDIR(st.st_mode))
 			sys_rmdir(path);
 		else
-- 
1.7.0.4

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