linux-kernel - [PATCH 1/9] vfs: fix double put after complete

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Date:	Tue,  6 Mar 2012 13:56:33 +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 1/9] vfs: fix double put after complete_walk()

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

complete_walk() already puts nd->path, no need to do it again at cleanup time.

This would result in Oopses if triggered, apparently the codepath is not too
well exercised.

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 e2ba628..f79aef1 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2261,7 +2261,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
 	/* Why this, you ask?  _Now_ we might have grown LOOKUP_JUMPED... */
 	error = complete_walk(nd);
 	if (error)
-		goto exit;
+		return ERR_PTR(error);
 	error = -EISDIR;
 	if (S_ISDIR(nd->inode->i_mode))
 		goto exit;
-- 
1.7.7

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