From 8a076191f373abaeb4aa5f6755d22e49db98940f Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Sat, 1 Mar 2008 21:51:09 +0200 Subject: LSM: Introduce inode_getsecid and ipc_getsecid hooks Introduce inode_getsecid(inode, secid) and ipc_getsecid(ipcp, secid) LSM hooks. These hooks will be used instead of similar exported SELinux interfaces. Let {inode,ipc,task}_getsecid hooks set the secid to 0 by default if CONFIG_SECURITY is not defined or if the hook is set to NULL (dummy). This is done to notify the caller that no valid secid exists. Signed-off-by: Casey Schaufler Signed-off-by: Ahmed S. Darwish Acked-by: James Morris Reviewed-by: Paul Moore --- security/dummy.c | 16 +++++++++++++++- security/security.c | 10 ++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) (limited to 'security') diff --git a/security/dummy.c b/security/dummy.c index 78d8f92310a4..fb2e942efbb6 100644 --- a/security/dummy.c +++ b/security/dummy.c @@ -424,6 +424,11 @@ static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t bu return 0; } +static void dummy_inode_getsecid(const struct inode *inode, u32 *secid) +{ + *secid = 0; +} + static int dummy_file_permission (struct file *file, int mask) { return 0; @@ -542,7 +547,9 @@ static int dummy_task_getsid (struct task_struct *p) } static void dummy_task_getsecid (struct task_struct *p, u32 *secid) -{ } +{ + *secid = 0; +} static int dummy_task_setgroups (struct group_info *group_info) { @@ -616,6 +623,11 @@ static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag) return 0; } +static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +{ + *secid = 0; +} + static int dummy_msg_msg_alloc_security (struct msg_msg *msg) { return 0; @@ -1058,6 +1070,7 @@ void security_fixup_ops (struct security_operations *ops) set_to_dummy_if_null(ops, inode_getsecurity); set_to_dummy_if_null(ops, inode_setsecurity); set_to_dummy_if_null(ops, inode_listsecurity); + set_to_dummy_if_null(ops, inode_getsecid); set_to_dummy_if_null(ops, file_permission); set_to_dummy_if_null(ops, file_alloc_security); set_to_dummy_if_null(ops, file_free_security); @@ -1094,6 +1107,7 @@ void security_fixup_ops (struct security_operations *ops) set_to_dummy_if_null(ops, task_reparent_to_init); set_to_dummy_if_null(ops, task_to_inode); set_to_dummy_if_null(ops, ipc_permission); + set_to_dummy_if_null(ops, ipc_getsecid); set_to_dummy_if_null(ops, msg_msg_alloc_security); set_to_dummy_if_null(ops, msg_msg_free_security); set_to_dummy_if_null(ops, msg_queue_alloc_security); diff --git a/security/security.c b/security/security.c index 9beecac933b4..290482bdbbb0 100644 --- a/security/security.c +++ b/security/security.c @@ -523,6 +523,11 @@ int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer return security_ops->inode_listsecurity(inode, buffer, buffer_size); } +void security_inode_getsecid(const struct inode *inode, u32 *secid) +{ + security_ops->inode_getsecid(inode, secid); +} + int security_file_permission(struct file *file, int mask) { return security_ops->file_permission(file, mask); @@ -712,6 +717,11 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) return security_ops->ipc_permission(ipcp, flag); } +void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +{ + security_ops->ipc_getsecid(ipcp, secid); +} + int security_msg_msg_alloc(struct msg_msg *msg) { return security_ops->msg_msg_alloc_security(msg); -- cgit v1.2.1 From 713a04aeaba35bb95d442cdeb52055498519be25 Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Sat, 1 Mar 2008 21:52:30 +0200 Subject: SELinux: setup new inode/ipc getsecid hooks Setup the new inode_getsecid and ipc_getsecid() LSM hooks for SELinux. Signed-off-by: Casey Schaufler Signed-off-by: Ahmed S. Darwish Acked-by: James Morris Reviewed-by: Paul Moore --- security/selinux/hooks.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) (limited to 'security') diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 34f2d46c7984..bfffaa52e0cb 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2792,6 +2792,12 @@ static int selinux_inode_killpriv(struct dentry *dentry) return secondary_ops->inode_killpriv(dentry); } +static void selinux_inode_getsecid(const struct inode *inode, u32 *secid) +{ + struct inode_security_struct *isec = inode->i_security; + *secid = isec->sid; +} + /* file security operations */ static int selinux_revalidate_file_permission(struct file *file, int mask) @@ -3183,7 +3189,8 @@ static int selinux_task_getsid(struct task_struct *p) static void selinux_task_getsecid(struct task_struct *p, u32 *secid) { - selinux_get_task_sid(p, secid); + struct task_security_struct *tsec = p->security; + *secid = tsec->sid; } static int selinux_task_setgroups(struct group_info *group_info) @@ -4149,7 +4156,7 @@ static int selinux_socket_getpeersec_dgram(struct socket *sock, struct sk_buff * goto out; if (sock && family == PF_UNIX) - selinux_get_inode_sid(SOCK_INODE(sock), &peer_secid); + selinux_inode_getsecid(SOCK_INODE(sock), &peer_secid); else if (skb) selinux_skb_peerlbl_sid(skb, family, &peer_secid); @@ -5026,6 +5033,12 @@ static int selinux_ipc_permission(struct kern_ipc_perm *ipcp, short flag) return ipc_has_perm(ipcp, av); } +static void selinux_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +{ + struct ipc_security_struct *isec = ipcp->security; + *secid = isec->sid; +} + /* module stacking operations */ static int selinux_register_security (const char *name, struct security_operations *ops) { @@ -5342,6 +5355,7 @@ static struct security_operations selinux_ops = { .inode_listsecurity = selinux_inode_listsecurity, .inode_need_killpriv = selinux_inode_need_killpriv, .inode_killpriv = selinux_inode_killpriv, + .inode_getsecid = selinux_inode_getsecid, .file_permission = selinux_file_permission, .file_alloc_security = selinux_file_alloc_security, @@ -5382,6 +5396,7 @@ static struct security_operations selinux_ops = { .task_to_inode = selinux_task_to_inode, .ipc_permission = selinux_ipc_permission, + .ipc_getsecid = selinux_ipc_getsecid, .msg_msg_alloc_security = selinux_msg_msg_alloc_security, .msg_msg_free_security = selinux_msg_msg_free_security, -- cgit v1.2.1 From 6b89a74be0fbbc6cc639d5cf7dcf8e6ee0f120a7 Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Sat, 1 Mar 2008 21:58:32 +0200 Subject: SELinux: remove redundant exports Remove the following exported SELinux interfaces: selinux_get_inode_sid(inode, sid) selinux_get_ipc_sid(ipcp, sid) selinux_get_task_sid(tsk, sid) selinux_sid_to_string(sid, ctx, len) They can be substitued with the following generic equivalents respectively: new LSM hook, inode_getsecid(inode, secid) new LSM hook, ipc_getsecid*(ipcp, secid) LSM hook, task_getsecid(tsk, secid) LSM hook, sid_to_secctx(sid, ctx, len) Signed-off-by: Casey Schaufler Signed-off-by: Ahmed S. Darwish Acked-by: James Morris Reviewed-by: Paul Moore --- security/selinux/exports.c | 42 ------------------------------------------ 1 file changed, 42 deletions(-) (limited to 'security') diff --git a/security/selinux/exports.c b/security/selinux/exports.c index 87d2bb3ea355..64af2d3409ef 100644 --- a/security/selinux/exports.c +++ b/security/selinux/exports.c @@ -25,48 +25,6 @@ /* SECMARK reference count */ extern atomic_t selinux_secmark_refcount; -int selinux_sid_to_string(u32 sid, char **ctx, u32 *ctxlen) -{ - if (selinux_enabled) - return security_sid_to_context(sid, ctx, ctxlen); - else { - *ctx = NULL; - *ctxlen = 0; - } - - return 0; -} - -void selinux_get_inode_sid(const struct inode *inode, u32 *sid) -{ - if (selinux_enabled) { - struct inode_security_struct *isec = inode->i_security; - *sid = isec->sid; - return; - } - *sid = 0; -} - -void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid) -{ - if (selinux_enabled) { - struct ipc_security_struct *isec = ipcp->security; - *sid = isec->sid; - return; - } - *sid = 0; -} - -void selinux_get_task_sid(struct task_struct *tsk, u32 *sid) -{ - if (selinux_enabled) { - struct task_security_struct *tsec = tsk->security; - *sid = tsec->sid; - return; - } - *sid = 0; -} - int selinux_string_to_sid(char *str, u32 *sid) { if (selinux_enabled) -- cgit v1.2.1 From 03d37d25e0f91b28c4b6d002be6221f1af4b19d8 Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Sat, 1 Mar 2008 22:00:05 +0200 Subject: LSM/Audit: Introduce generic Audit LSM hooks Introduce a generic Audit interface for security modules by adding the following new LSM hooks: audit_rule_init(field, op, rulestr, lsmrule) audit_rule_known(krule) audit_rule_match(secid, field, op, rule, actx) audit_rule_free(rule) Those hooks are only available if CONFIG_AUDIT is enabled. Signed-off-by: Casey Schaufler Signed-off-by: Ahmed S. Darwish Acked-by: James Morris Reviewed-by: Paul Moore --- security/dummy.c | 31 ++++++++++++++++++++++++++++++- security/security.c | 25 +++++++++++++++++++++++++ 2 files changed, 55 insertions(+), 1 deletion(-) (limited to 'security') diff --git a/security/dummy.c b/security/dummy.c index fb2e942efbb6..1ac9f8e66aa2 100644 --- a/security/dummy.c +++ b/security/dummy.c @@ -993,6 +993,30 @@ static inline int dummy_key_permission(key_ref_t key_ref, } #endif /* CONFIG_KEYS */ +#ifdef CONFIG_AUDIT +static inline int dummy_audit_rule_init(u32 field, u32 op, char *rulestr, + void **lsmrule) +{ + return 0; +} + +static inline int dummy_audit_rule_known(struct audit_krule *krule) +{ + return 0; +} + +static inline int dummy_audit_rule_match(u32 secid, u32 field, u32 op, + void *lsmrule, + struct audit_context *actx) +{ + return 0; +} + +static inline void dummy_audit_rule_free(void *lsmrule) +{ } + +#endif /* CONFIG_AUDIT */ + struct security_operations dummy_security_ops; #define set_to_dummy_if_null(ops, function) \ @@ -1182,6 +1206,11 @@ void security_fixup_ops (struct security_operations *ops) set_to_dummy_if_null(ops, key_free); set_to_dummy_if_null(ops, key_permission); #endif /* CONFIG_KEYS */ - +#ifdef CONFIG_AUDIT + set_to_dummy_if_null(ops, audit_rule_init); + set_to_dummy_if_null(ops, audit_rule_known); + set_to_dummy_if_null(ops, audit_rule_match); + set_to_dummy_if_null(ops, audit_rule_free); +#endif } diff --git a/security/security.c b/security/security.c index 290482bdbbb0..2ef593ec70f3 100644 --- a/security/security.c +++ b/security/security.c @@ -1120,3 +1120,28 @@ int security_key_permission(key_ref_t key_ref, } #endif /* CONFIG_KEYS */ + +#ifdef CONFIG_AUDIT + +int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) +{ + return security_ops->audit_rule_init(field, op, rulestr, lsmrule); +} + +int security_audit_rule_known(struct audit_krule *krule) +{ + return security_ops->audit_rule_known(krule); +} + +void security_audit_rule_free(void *lsmrule) +{ + security_ops->audit_rule_free(lsmrule); +} + +int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, + struct audit_context *actx) +{ + return security_ops->audit_rule_match(secid, field, op, lsmrule, actx); +} + +#endif /* CONFIG_AUDIT */ -- cgit v1.2.1 From 9d57a7f9e23dc30783d245280fc9907cf2c87837 Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Sat, 1 Mar 2008 22:03:14 +0200 Subject: SELinux: use new audit hooks, remove redundant exports Setup the new Audit LSM hooks for SELinux. Remove the now redundant exported SELinux Audit interface. Audit: Export 'audit_krule' and 'audit_field' to the public since their internals are needed by the implementation of the new LSM hook 'audit_rule_known'. Signed-off-by: Casey Schaufler Signed-off-by: Ahmed S. Darwish Acked-by: James Morris --- security/selinux/hooks.c | 8 ++++++++ security/selinux/ss/services.c | 45 +++++++++++++++++++++++++++++++----------- 2 files changed, 42 insertions(+), 11 deletions(-) (limited to 'security') diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index bfffaa52e0cb..a2f7e9cf78c5 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -83,6 +83,7 @@ #include "netport.h" #include "xfrm.h" #include "netlabel.h" +#include "audit.h" #define XATTR_SELINUX_SUFFIX "selinux" #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX @@ -5478,6 +5479,13 @@ static struct security_operations selinux_ops = { .key_free = selinux_key_free, .key_permission = selinux_key_permission, #endif + +#ifdef CONFIG_AUDIT + .audit_rule_init = selinux_audit_rule_init, + .audit_rule_known = selinux_audit_rule_known, + .audit_rule_match = selinux_audit_rule_match, + .audit_rule_free = selinux_audit_rule_free, +#endif }; static __init int selinux_init(void) diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index d75050819b06..1e0df5ec1bcd 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -57,6 +57,7 @@ #include "netlabel.h" #include "xfrm.h" #include "ebitmap.h" +#include "audit.h" extern void selnl_notify_policyload(u32 seqno); unsigned int policydb_loaded_version; @@ -2296,21 +2297,23 @@ struct selinux_audit_rule { struct context au_ctxt; }; -void selinux_audit_rule_free(struct selinux_audit_rule *rule) +void selinux_audit_rule_free(void *vrule) { + struct selinux_audit_rule *rule = vrule; + if (rule) { context_destroy(&rule->au_ctxt); kfree(rule); } } -int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, - struct selinux_audit_rule **rule) +int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) { struct selinux_audit_rule *tmprule; struct role_datum *roledatum; struct type_datum *typedatum; struct user_datum *userdatum; + struct selinux_audit_rule **rule = (struct selinux_audit_rule **)vrule; int rc = 0; *rule = NULL; @@ -2397,12 +2400,37 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, return rc; } -int selinux_audit_rule_match(u32 sid, u32 field, u32 op, - struct selinux_audit_rule *rule, +/* Check to see if the rule contains any selinux fields */ +int selinux_audit_rule_known(struct audit_krule *rule) +{ + int i; + + for (i = 0; i < rule->field_count; i++) { + struct audit_field *f = &rule->fields[i]; + switch (f->type) { + case AUDIT_SUBJ_USER: + case AUDIT_SUBJ_ROLE: + case AUDIT_SUBJ_TYPE: + case AUDIT_SUBJ_SEN: + case AUDIT_SUBJ_CLR: + case AUDIT_OBJ_USER: + case AUDIT_OBJ_ROLE: + case AUDIT_OBJ_TYPE: + case AUDIT_OBJ_LEV_LOW: + case AUDIT_OBJ_LEV_HIGH: + return 1; + } + } + + return 0; +} + +int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule, struct audit_context *actx) { struct context *ctxt; struct mls_level *level; + struct selinux_audit_rule *rule = vrule; int match = 0; if (!rule) { @@ -2509,7 +2537,7 @@ out: return match; } -static int (*aurule_callback)(void) = NULL; +static int (*aurule_callback)(void) = audit_update_lsm_rules; static int aurule_avc_callback(u32 event, u32 ssid, u32 tsid, u16 class, u32 perms, u32 *retained) @@ -2534,11 +2562,6 @@ static int __init aurule_init(void) } __initcall(aurule_init); -void selinux_audit_set_callback(int (*callback)(void)) -{ - aurule_callback = callback; -} - #ifdef CONFIG_NETLABEL /** * security_netlbl_cache_add - Add an entry to the NetLabel cache -- cgit v1.2.1 From 04305e4aff8b0533dc05f9f6f1a34d0796bd985f Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Sat, 19 Apr 2008 09:59:43 +1000 Subject: Audit: Final renamings and cleanup Rename the se_str and se_rule audit fields elements to lsm_str and lsm_rule to avoid confusion. Signed-off-by: Casey Schaufler Signed-off-by: Ahmed S. Darwish Acked-by: James Morris --- security/selinux/include/audit.h | 65 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 security/selinux/include/audit.h (limited to 'security') diff --git a/security/selinux/include/audit.h b/security/selinux/include/audit.h new file mode 100644 index 000000000000..6c8b9ef15579 --- /dev/null +++ b/security/selinux/include/audit.h @@ -0,0 +1,65 @@ +/* + * SELinux support for the Audit LSM hooks + * + * Most of below header was moved from include/linux/selinux.h which + * is released under below copyrights: + * + * Author: James Morris + * + * Copyright (C) 2005 Red Hat, Inc., James Morris + * Copyright (C) 2006 Trusted Computer Solutions, Inc. + * Copyright (C) 2006 IBM Corporation, Timothy R. Chavez + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, + * as published by the Free Software Foundation. + */ + +#ifndef _SELINUX_AUDIT_H +#define _SELINUX_AUDIT_H + +/** + * selinux_audit_rule_init - alloc/init an selinux audit rule structure. + * @field: the field this rule refers to + * @op: the operater the rule uses + * @rulestr: the text "target" of the rule + * @rule: pointer to the new rule structure returned via this + * + * Returns 0 if successful, -errno if not. On success, the rule structure + * will be allocated internally. The caller must free this structure with + * selinux_audit_rule_free() after use. + */ +int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **rule); + +/** + * selinux_audit_rule_free - free an selinux audit rule structure. + * @rule: pointer to the audit rule to be freed + * + * This will free all memory associated with the given rule. + * If @rule is NULL, no operation is performed. + */ +void selinux_audit_rule_free(void *rule); + +/** + * selinux_audit_rule_match - determine if a context ID matches a rule. + * @sid: the context ID to check + * @field: the field this rule refers to + * @op: the operater the rule uses + * @rule: pointer to the audit rule to check against + * @actx: the audit context (can be NULL) associated with the check + * + * Returns 1 if the context id matches the rule, 0 if it does not, and + * -errno on failure. + */ +int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *rule, + struct audit_context *actx); + +/** + * selinux_audit_rule_known - check to see if rule contains selinux fields. + * @rule: rule to be checked + * Returns 1 if there are selinux fields specified in the rule, 0 otherwise. + */ +int selinux_audit_rule_known(struct audit_krule *krule); + +#endif /* _SELINUX_AUDIT_H */ + -- cgit v1.2.1 From 076c54c5bcaed2081c0cba94a6f77c4d470236ad Mon Sep 17 00:00:00 2001 From: "Ahmed S. Darwish" Date: Thu, 6 Mar 2008 18:09:10 +0200 Subject: Security: Introduce security= boot parameter Add the security= boot parameter. This is done to avoid LSM registration clashes in case of more than one bult-in module. User can choose a security module to enable at boot. If no security= boot parameter is specified, only the first LSM asking for registration will be loaded. An invalid security module name will be treated as if no module has been chosen. LSM modules must check now if they are allowed to register by calling security_module_enable(ops) first. Modify SELinux and SMACK to do so. Do not let SMACK register smackfs if it was not chosen on boot. Smackfs assumes that smack hooks are registered and the initial task security setup (swapper->security) is done. Signed-off-by: Ahmed S. Darwish Acked-by: James Morris --- security/dummy.c | 4 +++- security/security.c | 38 +++++++++++++++++++++++++++++++++++++- security/selinux/hooks.c | 7 +++++++ security/smack/smack.h | 2 ++ security/smack/smack_lsm.c | 7 ++++++- security/smack/smackfs.c | 11 ++++++++++- 6 files changed, 65 insertions(+), 4 deletions(-) (limited to 'security') diff --git a/security/dummy.c b/security/dummy.c index 1ac9f8e66aa2..d797a4196b89 100644 --- a/security/dummy.c +++ b/security/dummy.c @@ -1017,7 +1017,9 @@ static inline void dummy_audit_rule_free(void *lsmrule) #endif /* CONFIG_AUDIT */ -struct security_operations dummy_security_ops; +struct security_operations dummy_security_ops = { + .name = "dummy", +}; #define set_to_dummy_if_null(ops, function) \ do { \ diff --git a/security/security.c b/security/security.c index 2ef593ec70f3..dd0c6baed494 100644 --- a/security/security.c +++ b/security/security.c @@ -17,6 +17,8 @@ #include #include +/* Boot-time LSM user choice */ +static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1]; /* things that live in dummy.c */ extern struct security_operations dummy_security_ops; @@ -67,13 +69,47 @@ int __init security_init(void) return 0; } +/* Save user chosen LSM */ +static int __init choose_lsm(char *str) +{ + strncpy(chosen_lsm, str, SECURITY_NAME_MAX); + return 1; +} +__setup("security=", choose_lsm); + +/** + * security_module_enable - Load given security module on boot ? + * @ops: a pointer to the struct security_operations that is to be checked. + * + * Each LSM must pass this method before registering its own operations + * to avoid security registration races. This method may also be used + * to check if your LSM is currently loaded. + * + * Return true if: + * -The passed LSM is the one chosen by user at boot time, + * -or user didsn't specify a specific LSM and we're the first to ask + * for registeration permissoin, + * -or the passed LSM is currently loaded. + * Otherwise, return false. + */ +int __init security_module_enable(struct security_operations *ops) +{ + if (!*chosen_lsm) + strncpy(chosen_lsm, ops->name, SECURITY_NAME_MAX); + else if (strncmp(ops->name, chosen_lsm, SECURITY_NAME_MAX)) + return 0; + + return 1; +} + /** * register_security - registers a security framework with the kernel * @ops: a pointer to the struct security_options that is to be registered * * This function is to allow a security module to register itself with the * kernel security subsystem. Some rudimentary checking is done on the @ops - * value passed to this function. + * value passed to this function. You'll need to check first if your LSM + * is allowed to register its @ops by calling security_module_enable(@ops). * * If there is already a security module registered with the kernel, * an error will be returned. Otherwise 0 is returned on success. diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index a2f7e9cf78c5..f9927f02bc3d 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -5295,6 +5295,8 @@ static int selinux_key_permission(key_ref_t key_ref, #endif static struct security_operations selinux_ops = { + .name = "selinux", + .ptrace = selinux_ptrace, .capget = selinux_capget, .capset_check = selinux_capset_check, @@ -5492,6 +5494,11 @@ static __init int selinux_init(void) { struct task_security_struct *tsec; + if (!security_module_enable(&selinux_ops)) { + selinux_enabled = 0; + return 0; + } + if (!selinux_enabled) { printk(KERN_INFO "SELinux: Disabled at boot.\n"); return 0; diff --git a/security/smack/smack.h b/security/smack/smack.h index 62c1e982849d..4a4477f5afdc 100644 --- a/security/smack/smack.h +++ b/security/smack/smack.h @@ -15,6 +15,7 @@ #include #include +#include #include /* @@ -187,6 +188,7 @@ extern struct smack_known smack_known_star; extern struct smack_known smack_known_unset; extern struct smk_list_entry *smack_list; +extern struct security_operations smack_ops; /* * Stricly for CIPSO level manipulation. diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 732ba27923c4..904bdc01a12b 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2424,7 +2424,9 @@ static void smack_release_secctx(char *secdata, u32 seclen) { } -static struct security_operations smack_ops = { +struct security_operations smack_ops = { + .name = "smack", + .ptrace = smack_ptrace, .capget = cap_capget, .capset_check = cap_capset_check, @@ -2557,6 +2559,9 @@ static struct security_operations smack_ops = { */ static __init int smack_init(void) { + if (!security_module_enable(&smack_ops)) + return 0; + printk(KERN_INFO "Smack: Initializing.\n"); /* diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index cfae8afcc262..6ba283783b70 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -965,12 +965,21 @@ static struct vfsmount *smackfs_mount; * * register the smackfs * - * Returns 0 unless the registration fails. + * Do not register smackfs if Smack wasn't enabled + * on boot. We can not put this method normally under the + * smack_init() code path since the security subsystem get + * initialized before the vfs caches. + * + * Returns true if we were not chosen on boot or if + * we were chosen and filesystem registration succeeded. */ static int __init init_smk_fs(void) { int err; + if (!security_module_enable(&smack_ops)) + return 0; + err = register_filesystem(&smk_fs_type); if (!err) { smackfs_mount = kern_mount(&smk_fs_type); -- cgit v1.2.1 From 7cea51be4e91edad05bd834f3235b45c57783f0d Mon Sep 17 00:00:00 2001 From: James Morris Date: Fri, 7 Mar 2008 12:23:49 +1100 Subject: security: fix up documentation for security_module_enable security_module_enable() can only be called during kernel init. Signed-off-by: James Morris --- security/security.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'security') diff --git a/security/security.c b/security/security.c index dd0c6baed494..4a6265ab3cc2 100644 --- a/security/security.c +++ b/security/security.c @@ -83,7 +83,7 @@ __setup("security=", choose_lsm); * * Each LSM must pass this method before registering its own operations * to avoid security registration races. This method may also be used - * to check if your LSM is currently loaded. + * to check if your LSM is currently loaded during kernel initialization. * * Return true if: * -The passed LSM is the one chosen by user at boot time, -- cgit v1.2.1