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NFS: Secure the roots of the NFS subtrees in a shared superblock

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Invoke security_d_instantiate() on root dentries after allocating them with
dentry_alloc_anon().  Normally dentry_alloc_root() would do that, but we don't
call that as we don't want to assign a name to the root dentry at this point
(we may discover the real name later).

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
David Howells 2006-07-30 14:58:27 -04:00 committed by Trond Myklebust
parent 27ba851244
commit 738a351959
1 changed files with 5 additions and 0 deletions
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5
fs/nfs/getroot.c
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@ -33,6 +33,7 @@
#include <linux/vfs.h>
#include <linux/namei.h>
#include <linux/namespace.h>
#include <linux/security.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@ -109,6 +110,8 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
return ERR_PTR(-ENOMEM);
}
security_d_instantiate(mntroot, inode);
if (!mntroot->d_op)
mntroot->d_op = server->nfs_client->rpc_ops->dentry_ops;
@ -296,6 +299,8 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
return ERR_PTR(-ENOMEM);
}
security_d_instantiate(mntroot, inode);
if (!mntroot->d_op)
mntroot->d_op = server->nfs_client->rpc_ops->dentry_ops;