From: Fred Isaman <iisaman@netapp.com>
Date: Tue, 24 Apr 2012 18:50:34 +0000 (-0400)
Subject: NFS: Prevent garbage cinfo->ds from leaking out
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=df0117481cd94dbb8970f4be9d05b0568fa09ab1;p=linux-beck.git

NFS: Prevent garbage cinfo->ds from leaking out

This is a bugfix that applies on top of the previous directio patches,
that fixes a bug introduced in "NFS: create struct nfs_commit_info".

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 806a55f513d9..80a63f6d9e14 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -1184,7 +1184,12 @@ filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo)
 static struct pnfs_ds_commit_info *
 filelayout_get_ds_info(struct inode *inode)
 {
-	return &FILELAYOUT_FROM_HDR(NFS_I(inode)->layout)->commit_info;
+	struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
+
+	if (layout == NULL)
+		return NULL;
+	else
+		return &FILELAYOUT_FROM_HDR(layout)->commit_info;
 }
 
 static struct pnfs_layoutdriver_type filelayout_type = {