From 81abe27b10af98f861c955be63da700938dd59c1 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 3 Aug 2012 09:38:08 -0700 Subject: [PATCH] userns: Fix link restrictions to use uid_eq Signed-off-by: "Eric W. Biederman" --- fs/namei.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index 1b464390dde8..05480a64d7b7 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -678,7 +678,7 @@ static inline int may_follow_link(struct path *link, struct nameidata *nd) /* Allowed if owner and follower match. */ inode = link->dentry->d_inode; - if (current_cred()->fsuid == inode->i_uid) + if (uid_eq(current_cred()->fsuid, inode->i_uid)) return 0; /* Allowed if parent directory not sticky and world-writable. */ @@ -687,7 +687,7 @@ static inline int may_follow_link(struct path *link, struct nameidata *nd) return 0; /* Allowed if parent directory and link owner match. */ - if (parent->i_uid == inode->i_uid) + if (uid_eq(parent->i_uid, inode->i_uid)) return 0; path_put_conditional(link, nd); @@ -757,7 +757,7 @@ static int may_linkat(struct path *link) /* Source inode owner (or CAP_FOWNER) can hardlink all they like, * otherwise, it must be a safe source. */ - if (cred->fsuid == inode->i_uid || safe_hardlink_source(inode) || + if (uid_eq(cred->fsuid, inode->i_uid) || safe_hardlink_source(inode) || capable(CAP_FOWNER)) return 0; -- 2.20.1