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SubjectMissing patch from stable [1/7]
Hi,

this patch from mainline seems suitable for -stable, but was not proposed
for inclusion. I think we should include it for next review unless the
author disagrees.

Thanks,
Willy
--

From 9c3580aa52195699065bc2d7242b1c7e3e6903fa Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 29 Apr 2008 00:59:48 -0700
Subject: ecryptfs: add missing lock around notify_change

Callers of notify_change() need to hold i_mutex.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/ecryptfs/inode.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index a7d5d7d..1623ebf 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -908,7 +908,9 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
ia->ia_valid &= ~ATTR_MODE;

+ mutex_lock(&lower_dentry->d_inode->i_mutex);
rc = notify_change(lower_dentry, ia);
+ mutex_unlock(&lower_dentry->d_inode->i_mutex);
out:
fsstack_copy_attr_all(inode, lower_inode, NULL);
return rc;
--
1.5.3.8


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