arm64: rockchip_defconfig: disable unused ethernet driver

[firefly-linux-kernel-4.4.55.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index 0202aebb9813faacb7e97815320b65923daa133f..0b0acba72a715aaa4ba22c6241c2ed3b10183121 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -887,6 +887,7 @@ static inline int may_follow_link(struct nameidata *nd)
 {
        const struct inode *inode;
        const struct inode *parent;
+       kuid_t puid;
 
        if (!sysctl_protected_symlinks)
                return 0;
@@ -902,7 +903,8 @@ static inline int may_follow_link(struct nameidata *nd)
                return 0;
 
        /* Allowed if parent directory and link owner match. */
-       if (uid_eq(parent->i_uid, inode->i_uid))
+       puid = parent->i_uid;
+       if (uid_valid(puid) && uid_eq(puid, inode->i_uid))
                return 0;
 
        if (nd->flags & LOOKUP_RCU)
@@ -2906,22 +2908,10 @@ no_open:
                dentry = lookup_real(dir, dentry, nd->flags);
                if (IS_ERR(dentry))
                        return PTR_ERR(dentry);
-
-               if (create_error) {
-                       int open_flag = op->open_flag;
-
-                       error = create_error;
-                       if ((open_flag & O_EXCL)) {
-                               if (!dentry->d_inode)
-                                       goto out;
-                       } else if (!dentry->d_inode) {
-                               goto out;
-                       } else if ((open_flag & O_TRUNC) &&
-                                  d_is_reg(dentry)) {
-                               goto out;
-                       }
-                       /* will fail later, go on to get the right error */
-               }
+       }
+       if (create_error && !dentry->d_inode) {
+               error = create_error;
+               goto out;
        }
 looked_up:
        path->dentry = dentry;