linux-kernel - [RFC][PATCH 2/4] fs: move file->f_cred initialization before security_file

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Message-Id: <201011221657.21504.roberto.sassu@polito.it>
Date:	Mon, 22 Nov 2010 16:57:21 +0100
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Paul Moore <paul.moore@...com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov
Subject: [RFC][PATCH 2/4] fs: move file->f_cred initialization before security_file_alloc()

The initialization of the 'f_cred' field of the file descriptor structure
has been moved before calling the function security_file_alloc() in order
to allow LSM security modules to use such information.

Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
---
 fs/file_table.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/file_table.c b/fs/file_table.c
index fd446e3..78b9174 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -125,13 +125,13 @@ struct file *get_empty_filp(const struct cred *task_cred)
 		goto fail;
 
 	percpu_counter_inc(&nr_files);
+	f->f_cred = get_cred(cred);
 	if (security_file_alloc(f))
 		goto fail_sec;
 
 	INIT_LIST_HEAD(&f->f_u.fu_list);
 	atomic_long_set(&f->f_count, 1);
 	rwlock_init(&f->f_owner.lock);
-	f->f_cred = get_cred(cred);
 	spin_lock_init(&f->f_lock);
 	eventpoll_init_file(f);
 	/* f->f_version: 0 */
-- 
1.7.2.3


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