linux-kernel - [PATCH 2/9] vfs: fix return value from do

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Message-Id: <1331038601-20353-3-git-send-email-miklos@szeredi.hu>
Date:	Tue,  6 Mar 2012 13:56:34 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	viro@...IV.linux.org.uk
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	hch@...radead.org, mszeredi@...e.cz, stable@...r.kernel.org
Subject: [PATCH 2/9] vfs: fix return value from do_last()

From: Miklos Szeredi <mszeredi@...e.cz>

complete_walk() returns either ECHILD or ESTALE.  do_last() turns this into
ECHILD unconditionally.  If not in RCU mode, this error will reach userspace
which is complete nonsense.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
CC: stable@...r.kernel.org
---
 fs/namei.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index f79aef1..46ea9cc 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2162,7 +2162,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
 		/* sayonara */
 		error = complete_walk(nd);
 		if (error)
-			return ERR_PTR(-ECHILD);
+			return ERR_PTR(error);
 
 		error = -ENOTDIR;
 		if (nd->flags & LOOKUP_DIRECTORY) {
-- 
1.7.7

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