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Tip revision: 0d02ec6b3136c73c09e7859f0d0e4e2c4c07b49b authored by Linus Torvalds on 21 March 2021, 21:56:43 UTC
Linux 5.12-rc4
Linux 5.12-rc4
Tip revision: 0d02ec6
ima.c
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2021 Microsoft Corporation
*
* Author: Lakshmi Ramasubramanian (nramas@linux.microsoft.com)
*
* Measure critical data structures maintainted by SELinux
* using IMA subsystem.
*/
#include <linux/vmalloc.h>
#include <linux/ima.h>
#include "security.h"
#include "ima.h"
/*
* selinux_ima_measure_state - Measure hash of the SELinux policy
*
* @state: selinux state struct
*
* NOTE: This function must be called with policy_mutex held.
*/
void selinux_ima_measure_state(struct selinux_state *state)
{
void *policy = NULL;
size_t policy_len;
int rc = 0;
/*
* Measure SELinux policy only after initialization is completed.
*/
if (!selinux_initialized(state))
return;
rc = security_read_state_kernel(state, &policy, &policy_len);
if (rc) {
pr_err("SELinux: %s: failed to read policy %d.\n", __func__, rc);
return;
}
ima_measure_critical_data("selinux", "selinux-policy-hash",
policy, policy_len, true);
vfree(policy);
}