From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 4 May 2015 00:59:58 +0000 (-0400)
Subject: trailing_symlink: nd->depth massage, part 5
X-Git-Tag: MMI-PSA29.97-13-9~9766^2~105
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f7df08ee05db41c6d2ec498703401197f6b68373;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

trailing_symlink: nd->depth massage, part 5

move increment of ->depth to the point where we'd discovered
that get_link() has not returned an error, adjust exits
accordingly.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namei.c b/fs/namei.c
index cf5009b87c5a..5753f46d8321 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2009,8 +2009,11 @@ static int trailing_symlink(struct nameidata *nd)
 	s = get_link(nd);
 	if (unlikely(IS_ERR(s)))
 		return PTR_ERR(s);
-	if (unlikely(!s))
+	nd->depth++;
+	if (unlikely(!s)) {
+		nd->depth--;
 		return 0;
+	}
 	if (*s == '/') {
 		if (!nd->root.mnt)
 			set_root(nd);
@@ -2020,12 +2023,14 @@ static int trailing_symlink(struct nameidata *nd)
 		nd->flags |= LOOKUP_JUMPED;
 	}
 	nd->inode = nd->path.dentry->d_inode;
-	nd->depth++;
 	error = link_path_walk(s, nd);
-	nd->depth--;
-	if (unlikely(error))
+	if (unlikely(error)) {
+		nd->depth--;
 		put_link(nd);
-	return error;
+		return error;
+	}
+	nd->depth--;
+	return 0;
 }
 
 static inline int lookup_last(struct nameidata *nd)