linux-kernel - [PATCH] namei: use current_fsuid() in may_follow

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Message-Id: <20200824125632.487331-1-efremov@linux.com>
Date:   Mon, 24 Aug 2020 15:56:32 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Denis Efremov <efremov@...ux.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] namei: use current_fsuid() in may_follow_link()

Modify may_follow_link() to use current_fsuid()

Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 fs/namei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/namei.c b/fs/namei.c
index e99e2a9da0f7..1a47c9d8ce13 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -958,7 +958,7 @@ static inline int may_follow_link(struct nameidata *nd, const struct inode *inod
 		return 0;
 
 	/* Allowed if owner and follower match. */
-	if (uid_eq(current_cred()->fsuid, inode->i_uid))
+	if (uid_eq(current_fsuid(), inode->i_uid))
 		return 0;
 
 	/* Allowed if parent directory not sticky and world-writable. */
-- 
2.26.2