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SubjectRe: [PATCH 3/6] integrity: IMA display
Quoting Mimi Zohar (zohar@linux.vnet.ibm.com):
> On Fri, 2009-01-30 at 20:18 +1100, James Morris wrote:
> > On Thu, 29 Jan 2009, Mimi Zohar wrote:
> >
> > > +int ima_fs_init(void)
> > > +{
> > > + ima_dir = securityfs_create_dir("ima", NULL);
> > > + if (!ima_dir || IS_ERR(ima_dir))
> > > + return -1;
> > > +
> > > + binary_runtime_measurements =
> > > + securityfs_create_file("binary_runtime_measurements",
> > > + S_IRUSR | S_IRGRP, ima_dir, NULL,
> > > + &ima_measurements_ops);
> > > + if (!binary_runtime_measurements || IS_ERR(binary_runtime_measurements))
> > > + goto out;
> >
> > You should not be checking for NULL returns from securityfs_create_file(),
> > because it does not return NULL (the documentation is wrong).
> >
> >
> > - James
>
> Thanks!
>
> Mimi

Wow, that's still the case??

From dec581b116f16657db9b6f59b7e71f7a7026cd21 Mon Sep 17 00:00:00 2001
From: Serge E. Hallyn <serue@us.ibm.com>
Date: Mon, 2 Feb 2009 15:07:33 -0800
Subject: [PATCH 1/1] securityfs: fix long-broken securityfs_create_file comment

If there is an error creating a file through securityfs_create_file,
NULL is not returned, rather the error is propagated.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
---
security/inode.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/security/inode.c b/security/inode.c
index efea5a6..ae243dd 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -205,12 +205,11 @@ static int create_by_name(const char *name, mode_t mode,
* This function returns a pointer to a dentry if it succeeds. This
* pointer must be passed to the securityfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here). If an error occurs, %NULL is returned.
+ * you are responsible here). If an error occurs, the function will return
+ * the erorr value (via ERR_PTR).
*
* If securityfs is not enabled in the kernel, the value %-ENODEV is
- * returned. It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * returned.
*/
struct dentry *securityfs_create_file(const char *name, mode_t mode,
struct dentry *parent, void *data,
--
1.5.4.3


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