https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: fe15c26ee26efa11741a7b632e9f23b01aca4cc6 authored by Linus Torvalds on 05 March 2023, 22:52:03 UTC
Linux 6.3-rc1
Linux 6.3-rc1
Tip revision: fe15c26
context.c
// SPDX-License-Identifier: GPL-2.0
/*
* Implementations of the security context functions.
*
* Author: Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (C) 2020 Red Hat, Inc.
*/
#include <linux/jhash.h>
#include "context.h"
#include "mls.h"
u32 context_compute_hash(const struct context *c)
{
u32 hash = 0;
/*
* If a context is invalid, it will always be represented by a
* context struct with only the len & str set (and vice versa)
* under a given policy. Since context structs from different
* policies should never meet, it is safe to hash valid and
* invalid contexts differently. The context_cmp() function
* already operates under the same assumption.
*/
if (c->len)
return full_name_hash(NULL, c->str, c->len);
hash = jhash_3words(c->user, c->role, c->type, hash);
hash = mls_range_hash(&c->range, hash);
return hash;
}