From 9e424eb1c5e3650a486f0c9997d12081b999d1b4 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 8 Mar 2013 09:03:07 -0800
Subject: [PATCH] vfs: don't BUG_ON() if following a /proc fd pseudo-symlink
 results in a symlink

commit 7b54c165a0c012edbaeaa73c5c87cb73721eb580 upstream.

It's "normal" - it can happen if the file descriptor you followed was
opened with O_NOFOLLOW.

Reported-by: Dave Jones <davej@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/namei.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 43a97ee..ec97aef 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -693,8 +693,6 @@ void nd_jump_link(struct nameidata *nd, struct path *path)
 	nd->path = *path;
 	nd->inode = nd->path.dentry->d_inode;
 	nd->flags |= LOOKUP_JUMPED;
-
-	BUG_ON(nd->inode->i_op->follow_link);
 }
 
 static inline void put_link(struct nameidata *nd, struct path *link, void *cookie)
-- 
2.7.4