linux-kernel - [146/146] AppArmor: fix oops in apparmor

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Date:	Wed, 01 Jun 2011 17:01:22 +0900
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Kees Cook <kees@...ntu.com>,
	John Johansen <john.johansen@...onical.com>,
	James Morris <jmorris@...ei.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [146/146] AppArmor: fix oops in apparmor_setprocattr

2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Kees Cook <kees.cook@...onical.com>

commit a5b2c5b2ad5853591a6cac6134cd0f599a720865 upstream.

When invalid parameters are passed to apparmor_setprocattr a NULL deref
oops occurs when it tries to record an audit message. This is because
it is passing NULL for the profile parameter for aa_audit. But aa_audit
now requires that the profile passed is not NULL.

Fix this by passing the current profile on the task that is trying to
setprocattr.

Signed-off-by: Kees Cook <kees@...ntu.com>
Signed-off-by: John Johansen <john.johansen@...onical.com>
Signed-off-by: James Morris <jmorris@...ei.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 security/apparmor/lsm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -592,7 +592,8 @@ static int apparmor_setprocattr(struct t
 			sa.aad.op = OP_SETPROCATTR;
 			sa.aad.info = name;
 			sa.aad.error = -EINVAL;
-			return aa_audit(AUDIT_APPARMOR_DENIED, NULL, GFP_KERNEL,
+			return aa_audit(AUDIT_APPARMOR_DENIED,
+					__aa_current_profile(), GFP_KERNEL,
 					&sa, NULL);
 		}
 	} else if (strcmp(name, "exec") == 0) {


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