AppArmor: fix oops in apparmor_setprocattr
authorKees Cook <kees.cook@canonical.com>
Tue, 31 May 2011 18:31:41 +0000 (11:31 -0700)
committerJames Morris <jmorris@namei.org>
Wed, 1 Jun 2011 03:07:03 +0000 (13:07 +1000)
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@ubuntu.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Cc: stable@kernel.org
Signed-off-by: James Morris <jmorris@namei.org>
security/apparmor/lsm.c

index ae3a698415e63603d9b159814b45c58b0f83eee0..ec1bcecf2cdacd6009c79d6a809d4b7b8443f29d 100644 (file)
@@ -593,7 +593,8 @@ static int apparmor_setprocattr(struct task_struct *task, char *name,
                        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) {