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aeca4e2ca6
SafeSetID gates the setid family of syscalls to restrict UID/GID
transitions from a given UID/GID to only those approved by a
system-wide whitelist. These restrictions also prohibit the given
UIDs/GIDs from obtaining auxiliary privileges associated with
CAP_SET{U/G}ID, such as allowing a user to set up user namespace UID
mappings. For now, only gating the set*uid family of syscalls is
supported, with support for set*gid coming in a future patch set.
Signed-off-by: Micah Morton <mortonm@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
34 lines
932 B
C
34 lines
932 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* SafeSetID Linux Security Module
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*
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* Author: Micah Morton <mortonm@chromium.org>
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*
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* Copyright (C) 2018 The Chromium OS Authors.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef _SAFESETID_H
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#define _SAFESETID_H
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#include <linux/types.h>
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/* Flag indicating whether initialization completed */
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extern int safesetid_initialized;
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/* Function type. */
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enum safesetid_whitelist_file_write_type {
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SAFESETID_WHITELIST_ADD, /* Add whitelist policy. */
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SAFESETID_WHITELIST_FLUSH, /* Flush whitelist policies. */
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};
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/* Add entry to safesetid whitelist to allow 'parent' to setid to 'child'. */
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int add_safesetid_whitelist_entry(kuid_t parent, kuid_t child);
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void flush_safesetid_whitelist_entries(void);
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#endif /* _SAFESETID_H */
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