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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/linux/cred.h
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@@ -1,12 +1,8 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /* Credentials management - see Documentation/security/credentials.rst
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  *
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  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
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  * Written by David Howells (dhowells@redhat.com)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public Licence
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- * as published by the Free Software Foundation; either version
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- * 2 of the Licence, or (at your option) any later version.
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  */
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 #ifndef _LINUX_CRED_H
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@@ -15,7 +11,6 @@
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 #include <linux/capability.h>
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 #include <linux/init.h>
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 #include <linux/key.h>
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-#include <linux/selinux.h>
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 #include <linux/atomic.h>
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 #include <linux/uidgid.h>
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 #include <linux/sched.h>
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@@ -139,7 +134,7 @@
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 #ifdef CONFIG_KEYS
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 	unsigned char	jit_keyring;	/* default keyring to attach requested
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 					 * keys to */
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-	struct key __rcu *session_keyring; /* keyring inherited over fork */
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+	struct key	*session_keyring; /* keyring inherited over fork */
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 	struct key	*process_keyring; /* keyring private to this process */
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 	struct key	*thread_keyring; /* keyring private to this thread */
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 	struct key	*request_key_auth; /* assumed request_key authority */
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@@ -173,6 +168,7 @@
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 extern int set_security_override(struct cred *, u32);
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 extern int set_security_override_from_ctx(struct cred *, const char *);
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 extern int set_create_files_as(struct cred *, struct inode *);
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+extern int cred_fscmp(const struct cred *, const struct cred *);
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 extern void __init cred_init(void);
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 /*
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@@ -256,6 +252,18 @@
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 	validate_creds(cred);
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 	nonconst_cred->non_rcu = 0;
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 	return get_new_cred(nonconst_cred);
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+}
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+
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+static inline const struct cred *get_cred_rcu(const struct cred *cred)
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+{
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+	struct cred *nonconst_cred = (struct cred *) cred;
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+	if (!cred)
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+		return NULL;
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+	if (!atomic_inc_not_zero(&nonconst_cred->usage))
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+		return NULL;
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+	validate_creds(cred);
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+	nonconst_cred->non_rcu = 0;
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+	return cred;
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 }
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 /**
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@@ -378,7 +386,6 @@
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 #define current_fsgid() 	(current_cred_xxx(fsgid))
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 #define current_cap()		(current_cred_xxx(cap_effective))
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 #define current_user()		(current_cred_xxx(user))
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-#define current_security()	(current_cred_xxx(security))
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 extern struct user_namespace init_user_ns;
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 #ifdef CONFIG_USER_NS