Re: 2.6.35.2: NFS related Oops

[Adam Lackorzynski <adam@os.inf.tu-dresden.de>]

On Tue Aug 17, 2010 at 18:09:53 +0800, Bian Naimeng wrote:
>   Please try to apply the followed patch.

Thanks, this fixes the Oops. Patch is required for both 2.6.35 and
2.6.36 trees.

 
----
 
We we open a positive file just with O_EXCL but no O_CREAT, may cause kernel crash.

Signed-off-by: Bian Naimeng <biannm@cn.fujitsu.com>
 
---
 fs/nfs/dir.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
 
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 29539ce..1a672dd 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1100,7 +1100,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
 		goto no_open_dput;
 	openflags = nd->intent.open.flags;
 	/* We cannot do exclusive creation on a positive dentry */
-	if ((openflags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL))
+	if (openflags & O_EXCL)
 		goto no_open_dput;
 	/* We can't create new files, or truncate existing ones here */
 	openflags &= ~(O_CREAT|O_TRUNC);
-- 
1.7.0



Adam
-- 
Adam                 adam@os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/