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-rw-r--r--include/linux/lsm_hooks.h77
-rw-r--r--include/linux/security.h46
-rw-r--r--security/Makefile2
-rw-r--r--security/apparmor/domain.c12
-rw-r--r--security/apparmor/lsm.c51
-rw-r--r--security/commoncap.c41
-rw-r--r--security/security.c570
-rw-r--r--security/selinux/hooks.c94
-rw-r--r--security/smack/smack.h2
-rw-r--r--security/smack/smack_lsm.c53
-rw-r--r--security/smack/smackfs.c2
-rw-r--r--security/tomoyo/tomoyo.c14
-rw-r--r--security/yama/yama_lsm.c50
13 files changed, 627 insertions, 387 deletions
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 27dd6fc..f014f25 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -25,21 +25,10 @@
#define __LINUX_LSM_HOOKS_H
#include <linux/security.h>
-
-/* Maximum number of letters for an LSM name string */
-#define SECURITY_NAME_MAX 10
-
-#ifdef CONFIG_SECURITY
+#include <linux/init.h>
+#include <linux/rculist.h>
/**
- * struct security_operations - main security structure
- *
- * Security module identifier.
- *
- * @name:
- * A string that acts as a unique identifier for the LSM with max number
- * of characters = SECURITY_NAME_MAX.
- *
* Security hooks for program execution operations.
*
* @bprm_set_creds:
@@ -1310,9 +1299,7 @@
* This is the main security structure.
*/
-struct security_operations {
- char name[SECURITY_NAME_MAX + 1];
-
+union security_list_options {
int (*binder_set_context_mgr)(struct task_struct *mgr);
int (*binder_transaction)(struct task_struct *from,
struct task_struct *to);
@@ -1838,20 +1825,62 @@ struct security_hook_heads {
};
/*
+ * Security module hook list structure.
+ * For use with generic list macros for common operations.
+ */
+struct security_hook_list {
+ struct list_head list;
+ struct list_head *head;
+ union security_list_options hook;
+};
+
+/*
* Initializing a security_hook_list structure takes
* up a lot of space in a source file. This macro takes
* care of the common case and reduces the amount of
* text involved.
- * Casey says: Comment is true in the next patch.
*/
-#define LSM_HOOK_INIT(HEAD, HOOK) .HEAD = HOOK
+#define LSM_HOOK_INIT(HEAD, HOOK) \
+ { .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }
+
+extern struct security_hook_heads security_hook_heads;
+
+static inline void security_add_hooks(struct security_hook_list *hooks,
+ int count)
+{
+ int i;
-/* prototypes */
-extern int security_module_enable(struct security_operations *ops);
-extern int register_security(struct security_operations *ops);
-extern void __init security_fixup_ops(struct security_operations *ops);
-extern void reset_security_ops(void);
+ for (i = 0; i < count; i++)
+ list_add_tail_rcu(&hooks[i].list, hooks[i].head);
+}
-#endif /* CONFIG_SECURITY */
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+/*
+ * Assuring the safety of deleting a security module is up to
+ * the security module involved. This may entail ordering the
+ * module's hook list in a particular way, refusing to disable
+ * the module once a policy is loaded or any number of other
+ * actions better imagined than described.
+ *
+ * The name of the configuration option reflects the only module
+ * that currently uses the mechanism. Any developer who thinks
+ * disabling their module is a good idea needs to be at least as
+ * careful as the SELinux team.
+ */
+static inline void security_delete_hooks(struct security_hook_list *hooks,
+ int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ list_del_rcu(&hooks[i].list);
+}
+#endif /* CONFIG_SECURITY_SELINUX_DISABLE */
+
+extern int __init security_module_enable(const char *module);
+extern void __init capability_add_hooks(void);
+#ifdef CONFIG_SECURITY_YAMA_STACKED
+void __init yama_add_hooks(void);
+#endif
#endif /* ! __LINUX_LSM_HOOKS_H */
diff --git a/include/linux/security.h b/include/linux/security.h
index a2a100e..8c8175d 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -27,6 +27,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/string.h>
+#include <linux/mm.h>
struct linux_binprm;
struct cred;
@@ -54,9 +55,6 @@ struct xattr;
struct xfrm_sec_ctx;
struct mm_struct;
-/* Maximum number of letters for an LSM name string */
-#define SECURITY_NAME_MAX 10
-
/* If capable should audit the security request */
#define SECURITY_CAP_NOAUDIT 0
#define SECURITY_CAP_AUDIT 1
@@ -69,10 +67,7 @@ struct audit_krule;
struct user_namespace;
struct timezone;
-/*
- * These functions are in security/capability.c and are used
- * as the default capabilities functions
- */
+/* These functions are in security/commoncap.c */
extern int cap_capable(const struct cred *cred, struct user_namespace *ns,
int cap, int audit);
extern int cap_settime(const struct timespec *ts, const struct timezone *tz);
@@ -114,8 +109,6 @@ struct xfrm_state;
struct xfrm_user_sec_ctx;
struct seq_file;
-extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb);
-
#ifdef CONFIG_MMU
extern unsigned long mmap_min_addr;
extern unsigned long dac_mmap_min_addr;
@@ -472,7 +465,7 @@ static inline int security_settime(const struct timespec *ts,
static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
- return cap_vm_enough_memory(mm, pages);
+ return __vm_enough_memory(mm, pages, cap_vm_enough_memory(mm, pages));
}
static inline int security_bprm_set_creds(struct linux_binprm *bprm)
@@ -1075,7 +1068,7 @@ static inline int security_setprocattr(struct task_struct *p, char *name, void *
static inline int security_netlink_send(struct sock *sk, struct sk_buff *skb)
{
- return cap_netlink_send(sk, skb);
+ return 0;
}
static inline int security_ismaclabel(const char *name)
@@ -1643,36 +1636,5 @@ static inline void free_secdata(void *secdata)
{ }
#endif /* CONFIG_SECURITY */
-#ifdef CONFIG_SECURITY_YAMA
-extern int yama_ptrace_access_check(struct task_struct *child,
- unsigned int mode);
-extern int yama_ptrace_traceme(struct task_struct *parent);
-extern void yama_task_free(struct task_struct *task);
-extern int yama_task_prctl(int option, unsigned long arg2, unsigned long arg3,
- unsigned long arg4, unsigned long arg5);
-#else
-static inline int yama_ptrace_access_check(struct task_struct *child,
- unsigned int mode)
-{
- return 0;
-}
-
-static inline int yama_ptrace_traceme(struct task_struct *parent)
-{
- return 0;
-}
-
-static inline void yama_task_free(struct task_struct *task)
-{
-}
-
-static inline int yama_task_prctl(int option, unsigned long arg2,
- unsigned long arg3, unsigned long arg4,
- unsigned long arg5)
-{
- return -ENOSYS;
-}
-#endif /* CONFIG_SECURITY_YAMA */
-
#endif /* ! __LINUX_SECURITY_H */
diff --git a/security/Makefile b/security/Makefile
index 05f1c93..c9bfbc8 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -14,7 +14,7 @@ obj-y += commoncap.o
obj-$(CONFIG_MMU) += min_addr.o
# Object file lists
-obj-$(CONFIG_SECURITY) += security.o capability.o
+obj-$(CONFIG_SECURITY) += security.o
obj-$(CONFIG_SECURITYFS) += inode.o
obj-$(CONFIG_SECURITY_SELINUX) += selinux/
obj-$(CONFIG_SECURITY_SMACK) += smack/
diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
index d97cba3..dc0027b 100644
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
@@ -347,9 +347,7 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
file_inode(bprm->file)->i_mode
};
const char *name = NULL, *target = NULL, *info = NULL;
- int error = cap_bprm_set_creds(bprm);
- if (error)
- return error;
+ int error = 0;
if (bprm->cred_prepared)
return 0;
@@ -531,15 +529,13 @@ cleanup:
*/
int apparmor_bprm_secureexec(struct linux_binprm *bprm)
{
- int ret = cap_bprm_secureexec(bprm);
-
/* the decision to use secure exec is computed in set_creds
* and stored in bprm->unsafe.
*/
- if (!ret && (bprm->unsafe & AA_SECURE_X_NEEDED))
- ret = 1;
+ if (bprm->unsafe & AA_SECURE_X_NEEDED)
+ return 1;
- return ret;
+ return 0;
}
/**
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index f542532..5696874 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -96,19 +96,11 @@ static void apparmor_cred_transfer(struct cred *new, const struct cred *old)
static int apparmor_ptrace_access_check(struct task_struct *child,
unsigned int mode)
{
- int error = cap_ptrace_access_check(child, mode);
- if (error)
- return error;
-
return aa_ptrace(current, child, mode);
}
static int apparmor_ptrace_traceme(struct task_struct *parent)
{
- int error = cap_ptrace_traceme(parent);
- if (error)
- return error;
-
return aa_ptrace(parent, current, PTRACE_MODE_ATTACH);
}
@@ -123,10 +115,10 @@ static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective,
cred = __task_cred(target);
profile = aa_cred_profile(cred);
- *effective = cred->cap_effective;
- *inheritable = cred->cap_inheritable;
- *permitted = cred->cap_permitted;
-
+ /*
+ * cap_capget is stacked ahead of this and will
+ * initialize effective and permitted.
+ */
if (!unconfined(profile) && !COMPLAIN_MODE(profile)) {
*effective = cap_intersect(*effective, profile->caps.allow);
*permitted = cap_intersect(*permitted, profile->caps.allow);
@@ -140,13 +132,11 @@ static int apparmor_capable(const struct cred *cred, struct user_namespace *ns,
int cap, int audit)
{
struct aa_profile *profile;
- /* cap_capable returns 0 on success, else -EPERM */
- int error = cap_capable(cred, ns, cap, audit);
- if (!error) {
- profile = aa_cred_profile(cred);
- if (!unconfined(profile))
- error = aa_capable(profile, cap, audit);
- }
+ int error = 0;
+
+ profile = aa_cred_profile(cred);
+ if (!unconfined(profile))
+ error = aa_capable(profile, cap, audit);
return error;
}
@@ -615,9 +605,7 @@ static int apparmor_task_setrlimit(struct task_struct *task,
return error;
}
-static struct security_operations apparmor_ops = {
- LSM_HOOK_INIT(name, "apparmor"),
-
+static struct security_hook_list apparmor_hooks[] = {
LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check),
LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme),
LSM_HOOK_INIT(capget, apparmor_capget),
@@ -640,7 +628,6 @@ static struct security_operations apparmor_ops = {
LSM_HOOK_INIT(file_alloc_security, apparmor_file_alloc_security),
LSM_HOOK_INIT(file_free_security, apparmor_file_free_security),
LSM_HOOK_INIT(mmap_file, apparmor_mmap_file),
- LSM_HOOK_INIT(mmap_addr, cap_mmap_addr),
LSM_HOOK_INIT(file_mprotect, apparmor_file_mprotect),
LSM_HOOK_INIT(file_lock, apparmor_file_lock),
@@ -898,7 +885,7 @@ static int __init apparmor_init(void)
{
int error;
- if (!apparmor_enabled || !security_module_enable(&apparmor_ops)) {
+ if (!apparmor_enabled || !security_module_enable("apparmor")) {
aa_info_message("AppArmor disabled by boot time parameter");
apparmor_enabled = 0;
return 0;
@@ -913,17 +900,10 @@ static int __init apparmor_init(void)
error = set_init_cxt();
if (error) {
AA_ERROR("Failed to set context on init task\n");
- goto register_security_out;
- }
-
- error = register_security(&apparmor_ops);
- if (error) {
- struct cred *cred = (struct cred *)current->real_cred;
- aa_free_task_context(cred_cxt(cred));
- cred_cxt(cred) = NULL;
- AA_ERROR("Unable to register AppArmor\n");
- goto register_security_out;
+ aa_free_root_ns();
+ goto alloc_out;
}
+ security_add_hooks(apparmor_hooks, ARRAY_SIZE(apparmor_hooks));
/* Report that AppArmor successfully initialized */
apparmor_initialized = 1;
@@ -936,9 +916,6 @@ static int __init apparmor_init(void)
return error;
-register_security_out:
- aa_free_root_ns();
-
alloc_out:
aa_destroy_aafs();
diff --git a/security/commoncap.c b/security/commoncap.c
index f2875cd..d103f5a4 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -12,7 +12,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
-#include <linux/security.h>
+#include <linux/lsm_hooks.h>
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/mman.h>
@@ -53,11 +53,6 @@ static void warn_setuid_and_fcaps_mixed(const char *fname)
}
}
-int cap_netlink_send(struct sock *sk, struct sk_buff *skb)
-{
- return 0;
-}
-
/**
* cap_capable - Determine whether a task has a particular effective capability
* @cred: The credentials to use
@@ -941,7 +936,7 @@ int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
* @pages: The size of the mapping
*
* Determine whether the allocation of a new virtual mapping by the current
- * task is permitted, returning 0 if permission is granted, -ve if not.
+ * task is permitted, returning 1 if permission is granted, 0 if not.
*/
int cap_vm_enough_memory(struct mm_struct *mm, long pages)
{
@@ -950,7 +945,7 @@ int cap_vm_enough_memory(struct mm_struct *mm, long pages)
if (cap_capable(current_cred(), &init_user_ns, CAP_SYS_ADMIN,
SECURITY_CAP_NOAUDIT) == 0)
cap_sys_admin = 1;
- return __vm_enough_memory(mm, pages, cap_sys_admin);
+ return cap_sys_admin;
}
/*
@@ -981,3 +976,33 @@ int cap_mmap_file(struct file *file, unsigned long reqprot,
{
return 0;
}
+
+#ifdef CONFIG_SECURITY
+
+struct security_hook_list capability_hooks[] = {
+ LSM_HOOK_INIT(capable, cap_capable),
+ LSM_HOOK_INIT(settime, cap_settime),
+ LSM_HOOK_INIT(ptrace_access_check, cap_ptrace_access_check),
+ LSM_HOOK_INIT(ptrace_traceme, cap_ptrace_traceme),
+ LSM_HOOK_INIT(capget, cap_capget),
+ LSM_HOOK_INIT(capset, cap_capset),
+ LSM_HOOK_INIT(bprm_set_creds, cap_bprm_set_creds),
+ LSM_HOOK_INIT(bprm_secureexec, cap_bprm_secureexec),
+ LSM_HOOK_INIT(inode_need_killpriv, cap_inode_need_killpriv),
+ LSM_HOOK_INIT(inode_killpriv, cap_inode_killpriv),
+ LSM_HOOK_INIT(mmap_addr, cap_mmap_addr),
+ LSM_HOOK_INIT(mmap_file, cap_mmap_file),
+ LSM_HOOK_INIT(task_fix_setuid, cap_task_fix_setuid),
+ LSM_HOOK_INIT(task_prctl, cap_task_prctl),
+ LSM_HOOK_INIT(task_setscheduler, cap_task_setscheduler),
+ LSM_HOOK_INIT(task_setioprio, cap_task_setioprio),
+ LSM_HOOK_INIT(task_setnice, cap_task_setnice),
+ LSM_HOOK_INIT(vm_enough_memory, cap_vm_enough_memory),
+};
+
+void __init capability_add_hooks(void)
+{
+ security_add_hooks(capability_hooks, ARRAY_SIZE(capability_hooks));
+}
+
+#endif /* CONFIG_SECURITY */
diff --git a/security/security.c b/security/security.c
index 02dc720..bd4c5f6 100644
--- a/security/security.c
+++ b/security/security.c
@@ -29,24 +29,13 @@
#define MAX_LSM_EVM_XATTR 2
+/* Maximum number of letters for an LSM name string */
+#define SECURITY_NAME_MAX 10
+
/* Boot-time LSM user choice */
static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
CONFIG_DEFAULT_SECURITY;
-static struct security_operations *security_ops;
-static struct security_operations default_security_ops = {
- .name = "default",
-};
-
-static inline int __init verify(struct security_operations *ops)
-{
- /* verify the security_operations structure exists */
- if (!ops)
- return -EINVAL;
- security_fixup_ops(ops);
- return 0;
-}
-
static void __init do_security_initcalls(void)
{
initcall_t *call;
@@ -64,20 +53,27 @@ static void __init do_security_initcalls(void)
*/
int __init security_init(void)
{
- printk(KERN_INFO "Security Framework initialized\n");
+ pr_info("Security Framework initialized\n");
- security_fixup_ops(&default_security_ops);
- security_ops = &default_security_ops;
+ /*
+ * Always load the capability module.
+ */
+ capability_add_hooks();
+#ifdef CONFIG_SECURITY_YAMA_STACKED
+ /*
+ * If Yama is configured for stacking load it next.
+ */
+ yama_add_hooks();
+#endif
+ /*
+ * Load the chosen module if there is one.
+ * This will also find yama if it is stacking
+ */
do_security_initcalls();
return 0;
}
-void reset_security_ops(void)
-{
- security_ops = &default_security_ops;
-}
-
/* Save user chosen LSM */
static int __init choose_lsm(char *str)
{
@@ -88,7 +84,7 @@ __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.
+ * @module: the name of the module
*
* Each LSM must pass this method before registering its own operations
* to avoid security registration races. This method may also be used
@@ -100,41 +96,13 @@ __setup("security=", choose_lsm);
* choose an alternate LSM at boot time.
* Otherwise, return false.
*/
-int __init security_module_enable(struct security_operations *ops)
+int __init security_module_enable(const char *module)
{
- return !strcmp(ops->name, chosen_lsm);
-}
-
-/**
- * register_security - registers a security framework with the kernel
- * @ops: a pointer to the struct security_options that is to be registered
- *
- * This function allows a security module to register itself with the
- * kernel security subsystem. Some rudimentary checking is done on the @ops
- * 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.
- */
-int __init register_security(struct security_operations *ops)
-{
- if (verify(ops)) {
- printk(KERN_DEBUG "%s could not verify "
- "security_operations structure.\n", __func__);
- return -EINVAL;
- }
-
- if (security_ops != &default_security_ops)
- return -EAGAIN;
-
- security_ops = ops;
-
- return 0;
+ return !strcmp(module, chosen_lsm);
}
/*
- * Hook operation macros.
+ * Hook list operation macros.
*
* call_void_hook:
* This is a hook that does not return a value.
@@ -143,8 +111,27 @@ int __init register_security(struct security_operations *ops)
* This is a hook that returns a value.
*/
-#define call_void_hook(FUNC, ...) security_ops->FUNC(__VA_ARGS__)
-#define call_int_hook(FUNC, IRC, ...) security_ops->FUNC(__VA_ARGS__)
+#define call_void_hook(FUNC, ...) \
+ do { \
+ struct security_hook_list *P; \
+ \
+ list_for_each_entry(P, &security_hook_heads.FUNC, list) \
+ P->hook.FUNC(__VA_ARGS__); \
+ } while (0)
+
+#define call_int_hook(FUNC, IRC, ...) ({ \
+ int RC = IRC; \
+ do { \
+ struct security_hook_list *P; \
+ \
+ list_for_each_entry(P, &security_hook_heads.FUNC, list) { \
+ RC = P->hook.FUNC(__VA_ARGS__); \
+ if (RC != 0) \
+ break; \
+ } \
+ } while (0); \
+ RC; \
+})
/* Security operations */
@@ -173,23 +160,11 @@ int security_binder_transfer_file(struct task_struct *from,
int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
{
-#ifdef CONFIG_SECURITY_YAMA_STACKED
- int rc;
- rc = yama_ptrace_access_check(child, mode);
- if (rc)
- return rc;
-#endif
return call_int_hook(ptrace_access_check, 0, child, mode);
}
int security_ptrace_traceme(struct task_struct *parent)
{
-#ifdef CONFIG_SECURITY_YAMA_STACKED
- int rc;
- rc = yama_ptrace_traceme(parent);
- if (rc)
- return rc;
-#endif
return call_int_hook(ptrace_traceme, 0, parent);
}
@@ -245,7 +220,25 @@ int security_settime(const struct timespec *ts, const struct timezone *tz)
int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
- return call_int_hook(vm_enough_memory, 0, mm, pages);
+ struct security_hook_list *hp;
+ int cap_sys_admin = 1;
+ int rc;
+
+ /*
+ * The module will respond with a positive value if
+ * it thinks the __vm_enough_memory() call should be
+ * made with the cap_sys_admin set. If all of the modules
+ * agree that it should be set it will. If any module
+ * thinks it should not be set it won't.
+ */
+ list_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
+ rc = hp->hook.vm_enough_memory(mm, pages);
+ if (rc <= 0) {
+ cap_sys_admin = 0;
+ break;
+ }
+ }
+ return __vm_enough_memory(mm, pages, cap_sys_admin);
}
int security_bprm_set_creds(struct linux_binprm *bprm)
@@ -335,8 +328,9 @@ int security_sb_set_mnt_opts(struct super_block *sb,
unsigned long kern_flags,
unsigned long *set_kern_flags)
{
- return call_int_hook(sb_set_mnt_opts, 0, sb, opts, kern_flags,
- set_kern_flags);
+ return call_int_hook(sb_set_mnt_opts,
+ opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
+ opts, kern_flags, set_kern_flags);
}
EXPORT_SYMBOL(security_sb_set_mnt_opts);
@@ -369,8 +363,8 @@ int security_dentry_init_security(struct dentry *dentry, int mode,
struct qstr *name, void **ctx,
u32 *ctxlen)
{
- return call_int_hook(dentry_init_security, 0, dentry, mode, name,
- ctx, ctxlen);
+ return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
+ name, ctx, ctxlen);
}
EXPORT_SYMBOL(security_dentry_init_security);
@@ -390,7 +384,7 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
NULL, NULL, NULL);
memset(new_xattrs, 0, sizeof(new_xattrs));
lsm_xattr = new_xattrs;
- ret = call_int_hook(inode_init_security, 0, inode, dir, qstr,
+ ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
&lsm_xattr->name,
&lsm_xattr->value,
&lsm_xattr->value_len);
@@ -636,8 +630,15 @@ int security_inode_setxattr(struct dentry *dentry, const char *name,
if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
return 0;
- ret = call_int_hook(inode_setxattr, 0, dentry, name, value, size,
+ /*
+ * SELinux and Smack integrate the cap call,
+ * so assume that all LSMs supplying this call do so.
+ */
+ ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
flags);
+
+ if (ret == 1)
+ ret = cap_inode_setxattr(dentry, name, value, size, flags);
if (ret)
return ret;
ret = ima_inode_setxattr(dentry, name, value, size);
@@ -675,7 +676,13 @@ int security_inode_removexattr(struct dentry *dentry, const char *name)
if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
return 0;
- ret = call_int_hook(inode_removexattr, 0, dentry, name);
+ /*
+ * SELinux and Smack integrate the cap call,
+ * so assume that all LSMs supplying this call do so.
+ */
+ ret = call_int_hook(inode_removexattr, 1, dentry, name);
+ if (ret == 1)
+ ret = cap_inode_removexattr(dentry, name);
if (ret)
return ret;
ret = ima_inode_removexattr(dentry, name);
@@ -698,15 +705,16 @@ int security_inode_getsecurity(const struct inode *inode, const char *name, void
{
if (unlikely(IS_PRIVATE(inode)))
return -EOPNOTSUPP;
- return call_int_hook(inode_getsecurity, 0, inode, name, buffer, alloc);
+ return call_int_hook(inode_getsecurity, -EOPNOTSUPP, inode, name,
+ buffer, alloc);
}
int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
{
if (unlikely(IS_PRIVATE(inode)))
return -EOPNOTSUPP;
- return call_int_hook(inode_setsecurity, 0, inode, name, value, size,
- flags);
+ return call_int_hook(inode_setsecurity, -EOPNOTSUPP, inode, name,
+ value, size, flags);
}
int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
@@ -847,9 +855,6 @@ int security_task_create(unsigned long clone_flags)
void security_task_free(struct task_struct *task)
{
-#ifdef CONFIG_SECURITY_YAMA_STACKED
- yama_task_free(task);
-#endif
call_void_hook(task_free, task);
}
@@ -932,6 +937,7 @@ int security_task_getsid(struct task_struct *p)
void security_task_getsecid(struct task_struct *p, u32 *secid)
{
+ *secid = 0;
call_void_hook(task_getsecid, p, secid);
}
EXPORT_SYMBOL(security_task_getsecid);
@@ -986,13 +992,19 @@ int security_task_wait(struct task_struct *p)
int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5)
{
-#ifdef CONFIG_SECURITY_YAMA_STACKED
- int rc;
- rc = yama_task_prctl(option, arg2, arg3, arg4, arg5);
- if (rc != -ENOSYS)
- return rc;
-#endif
- return call_int_hook(task_prctl, 0, option, arg2, arg3, arg4, arg5);
+ int thisrc;
+ int rc = -ENOSYS;
+ struct security_hook_list *hp;
+
+ list_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
+ thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
+ if (thisrc != -ENOSYS) {
+ rc = thisrc;
+ if (thisrc != 0)
+ break;
+ }
+ }
+ return rc;
}
void security_task_to_inode(struct task_struct *p, struct inode *inode)
@@ -1007,6 +1019,7 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
{
+ *secid = 0;
call_void_hook(ipc_getsecid, ipcp, secid);
}
@@ -1113,12 +1126,12 @@ EXPORT_SYMBOL(security_d_instantiate);
int security_getprocattr(struct task_struct *p, char *name, char **value)
{
- return call_int_hook(getprocattr, 0, p, name, value);
+ return call_int_hook(getprocattr, -EINVAL, p, name, value);
}
int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
{
- return call_int_hook(setprocattr, 0, p, name, value, size);
+ return call_int_hook(setprocattr, -EINVAL, p, name, value, size);
}
int security_netlink_send(struct sock *sk, struct sk_buff *skb)
@@ -1134,12 +1147,14 @@ EXPORT_SYMBOL(security_ismaclabel);
int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
- return call_int_hook(secid_to_secctx, 0, secid, secdata, seclen);
+ return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
+ seclen);
}
EXPORT_SYMBOL(security_secid_to_secctx);
int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
{
+ *secid = 0;
return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
}
EXPORT_SYMBOL(security_secctx_to_secid);
@@ -1164,7 +1179,7 @@ EXPORT_SYMBOL(security_inode_setsecctx);
int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
{
- return call_int_hook(inode_getsecctx, 0, inode, ctx, ctxlen);
+ return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
}
EXPORT_SYMBOL(security_inode_getsecctx);
@@ -1259,8 +1274,8 @@ EXPORT_SYMBOL(security_sock_rcv_skb);
int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
int __user *optlen, unsigned len)
{
- return call_int_hook(socket_getpeersec_stream, 0, sock, optval,
- optlen, len);
+ return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
+ optval, optlen, len);
}
int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
@@ -1438,7 +1453,24 @@ int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
struct xfrm_policy *xp,
const struct flowi *fl)
{
- return call_int_hook(xfrm_state_pol_flow_match, 0, x, xp, fl);
+ struct security_hook_list *hp;
+ int rc = 1;
+
+ /*
+ * Since this function is expected to return 0 or 1, the judgment
+ * becomes difficult if multiple LSMs supply this call. Fortunately,
+ * we can use the first LSM's judgment because currently only SELinux
+ * supplies this call.
+ *
+ * For speed optimization, we explicitly break the loop rather than
+ * using the macro
+ */
+ list_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
+ list) {
+ rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
+ break;
+ }
+ return rc;
}
int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
@@ -1478,6 +1510,7 @@ int security_key_permission(key_ref_t key_ref,
int security_key_getsecurity(struct key *key, char **_buffer)
{
+ *_buffer = NULL;
return call_int_hook(key_getsecurity, 0, key, _buffer);
}
@@ -1506,5 +1539,350 @@ int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
actx);
}
+#endif /* CONFIG_AUDIT */
+struct security_hook_heads security_hook_heads = {
+ .binder_set_context_mgr =
+ LIST_HEAD_INIT(security_hook_heads.binder_set_context_mgr),
+ .binder_transaction =
+ LIST_HEAD_INIT(security_hook_heads.binder_transaction),
+ .binder_transfer_binder =
+ LIST_HEAD_INIT(security_hook_heads.binder_transfer_binder),
+ .binder_transfer_file =
+ LIST_HEAD_INIT(security_hook_heads.binder_transfer_file),
+
+ .ptrace_access_check =
+ LIST_HEAD_INIT(security_hook_heads.ptrace_access_check),
+ .ptrace_traceme =
+ LIST_HEAD_INIT(security_hook_heads.ptrace_traceme),
+ .capget = LIST_HEAD_INIT(security_hook_heads.capget),
+ .capset = LIST_HEAD_INIT(security_hook_heads.capset),
+ .capable = LIST_HEAD_INIT(security_hook_heads.capable),
+ .quotactl = LIST_HEAD_INIT(security_hook_heads.quotactl),
+ .quota_on = LIST_HEAD_INIT(security_hook_heads.quota_on),
+ .syslog = LIST_HEAD_INIT(security_hook_heads.syslog),
+ .settime = LIST_HEAD_INIT(security_hook_heads.settime),
+ .vm_enough_memory =
+ LIST_HEAD_INIT(security_hook_heads.vm_enough_memory),
+ .bprm_set_creds =
+ LIST_HEAD_INIT(security_hook_heads.bprm_set_creds),
+ .bprm_check_security =
+ LIST_HEAD_INIT(security_hook_heads.bprm_check_security),
+ .bprm_secureexec =
+ LIST_HEAD_INIT(security_hook_heads.bprm_secureexec),
+ .bprm_committing_creds =
+ LIST_HEAD_INIT(security_hook_heads.bprm_committing_creds),
+ .bprm_committed_creds =
+ LIST_HEAD_INIT(security_hook_heads.bprm_committed_creds),
+ .sb_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.sb_alloc_security),
+ .sb_free_security =
+ LIST_HEAD_INIT(security_hook_heads.sb_free_security),
+ .sb_copy_data = LIST_HEAD_INIT(security_hook_heads.sb_copy_data),
+ .sb_remount = LIST_HEAD_INIT(security_hook_heads.sb_remount),
+ .sb_kern_mount =
+ LIST_HEAD_INIT(security_hook_heads.sb_kern_mount),
+ .sb_show_options =
+ LIST_HEAD_INIT(security_hook_heads.sb_show_options),
+ .sb_statfs = LIST_HEAD_INIT(security_hook_heads.sb_statfs),
+ .sb_mount = LIST_HEAD_INIT(security_hook_heads.sb_mount),
+ .sb_umount = LIST_HEAD_INIT(security_hook_heads.sb_umount),
+ .sb_pivotroot = LIST_HEAD_INIT(security_hook_heads.sb_pivotroot),
+ .sb_set_mnt_opts =
+ LIST_HEAD_INIT(security_hook_heads.sb_set_mnt_opts),
+ .sb_clone_mnt_opts =
+ LIST_HEAD_INIT(security_hook_heads.sb_clone_mnt_opts),
+ .sb_parse_opts_str =
+ LIST_HEAD_INIT(security_hook_heads.sb_parse_opts_str),
+ .dentry_init_security =
+ LIST_HEAD_INIT(security_hook_heads.dentry_init_security),
+#ifdef CONFIG_SECURITY_PATH
+ .path_unlink = LIST_HEAD_INIT(security_hook_heads.path_unlink),
+ .path_mkdir = LIST_HEAD_INIT(security_hook_heads.path_mkdir),
+ .path_rmdir = LIST_HEAD_INIT(security_hook_heads.path_rmdir),
+ .path_mknod = LIST_HEAD_INIT(security_hook_heads.path_mknod),
+ .path_truncate =
+ LIST_HEAD_INIT(security_hook_heads.path_truncate),
+ .path_symlink = LIST_HEAD_INIT(security_hook_heads.path_symlink),
+ .path_link = LIST_HEAD_INIT(security_hook_heads.path_link),
+ .path_rename = LIST_HEAD_INIT(security_hook_heads.path_rename),
+ .path_chmod = LIST_HEAD_INIT(security_hook_heads.path_chmod),
+ .path_chown = LIST_HEAD_INIT(security_hook_heads.path_chown),
+ .path_chroot = LIST_HEAD_INIT(security_hook_heads.path_chroot),
+#endif
+ .inode_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.inode_alloc_security),
+ .inode_free_security =
+ LIST_HEAD_INIT(security_hook_heads.inode_free_security),
+ .inode_init_security =
+ LIST_HEAD_INIT(security_hook_heads.inode_init_security),
+ .inode_create = LIST_HEAD_INIT(security_hook_heads.inode_create),
+ .inode_link = LIST_HEAD_INIT(security_hook_heads.inode_link),
+ .inode_unlink = LIST_HEAD_INIT(security_hook_heads.inode_unlink),
+ .inode_symlink =
+ LIST_HEAD_INIT(security_hook_heads.inode_symlink),
+ .inode_mkdir = LIST_HEAD_INIT(security_hook_heads.inode_mkdir),
+ .inode_rmdir = LIST_HEAD_INIT(security_hook_heads.inode_rmdir),
+ .inode_mknod = LIST_HEAD_INIT(security_hook_heads.inode_mknod),
+ .inode_rename = LIST_HEAD_INIT(security_hook_heads.inode_rename),
+ .inode_readlink =
+ LIST_HEAD_INIT(security_hook_heads.inode_readlink),
+ .inode_follow_link =
+ LIST_HEAD_INIT(security_hook_heads.inode_follow_link),
+ .inode_permission =
+ LIST_HEAD_INIT(security_hook_heads.inode_permission),
+ .inode_setattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_setattr),
+ .inode_getattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_getattr),
+ .inode_setxattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_setxattr),
+ .inode_post_setxattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_post_setxattr),
+ .inode_getxattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_getxattr),
+ .inode_listxattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_listxattr),
+ .inode_removexattr =
+ LIST_HEAD_INIT(security_hook_heads.inode_removexattr),
+ .inode_need_killpriv =
+ LIST_HEAD_INIT(security_hook_heads.inode_need_killpriv),
+ .inode_killpriv =
+ LIST_HEAD_INIT(security_hook_heads.inode_killpriv),
+ .inode_getsecurity =
+ LIST_HEAD_INIT(security_hook_heads.inode_getsecurity),
+ .inode_setsecurity =
+ LIST_HEAD_INIT(security_hook_heads.inode_setsecurity),
+ .inode_listsecurity =
+ LIST_HEAD_INIT(security_hook_heads.inode_listsecurity),
+ .inode_getsecid =
+ LIST_HEAD_INIT(security_hook_heads.inode_getsecid),
+ .file_permission =
+ LIST_HEAD_INIT(security_hook_heads.file_permission),
+ .file_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.file_alloc_security),
+ .file_free_security =
+ LIST_HEAD_INIT(security_hook_heads.file_free_security),
+ .file_ioctl = LIST_HEAD_INIT(security_hook_heads.file_ioctl),
+ .mmap_addr = LIST_HEAD_INIT(security_hook_heads.mmap_addr),
+ .mmap_file = LIST_HEAD_INIT(security_hook_heads.mmap_file),
+ .file_mprotect =
+ LIST_HEAD_INIT(security_hook_heads.file_mprotect),
+ .file_lock = LIST_HEAD_INIT(security_hook_heads.file_lock),
+ .file_fcntl = LIST_HEAD_INIT(security_hook_heads.file_fcntl),
+ .file_set_fowner =
+ LIST_HEAD_INIT(security_hook_heads.file_set_fowner),
+ .file_send_sigiotask =
+ LIST_HEAD_INIT(security_hook_heads.file_send_sigiotask),
+ .file_receive = LIST_HEAD_INIT(security_hook_heads.file_receive),
+ .file_open = LIST_HEAD_INIT(security_hook_heads.file_open),
+ .task_create = LIST_HEAD_INIT(security_hook_heads.task_create),
+ .task_free = LIST_HEAD_INIT(security_hook_heads.task_free),
+ .cred_alloc_blank =
+ LIST_HEAD_INIT(security_hook_heads.cred_alloc_blank),
+ .cred_free = LIST_HEAD_INIT(security_hook_heads.cred_free),
+ .cred_prepare = LIST_HEAD_INIT(security_hook_heads.cred_prepare),
+ .cred_transfer =
+ LIST_HEAD_INIT(security_hook_heads.cred_transfer),
+ .kernel_act_as =
+ LIST_HEAD_INIT(security_hook_heads.kernel_act_as),
+ .kernel_create_files_as =
+ LIST_HEAD_INIT(security_hook_heads.kernel_create_files_as),
+ .kernel_fw_from_file =
+ LIST_HEAD_INIT(security_hook_heads.kernel_fw_from_file),
+ .kernel_module_request =
+ LIST_HEAD_INIT(security_hook_heads.kernel_module_request),
+ .kernel_module_from_file =
+ LIST_HEAD_INIT(security_hook_heads.kernel_module_from_file),
+ .task_fix_setuid =
+ LIST_HEAD_INIT(security_hook_heads.task_fix_setuid),
+ .task_setpgid = LIST_HEAD_INIT(security_hook_heads.task_setpgid),
+ .task_getpgid = LIST_HEAD_INIT(security_hook_heads.task_getpgid),
+ .task_getsid = LIST_HEAD_INIT(security_hook_heads.task_getsid),
+ .task_getsecid =
+ LIST_HEAD_INIT(security_hook_heads.task_getsecid),
+ .task_setnice = LIST_HEAD_INIT(security_hook_heads.task_setnice),
+ .task_setioprio =
+ LIST_HEAD_INIT(security_hook_heads.task_setioprio),
+ .task_getioprio =
+ LIST_HEAD_INIT(security_hook_heads.task_getioprio),
+ .task_setrlimit =
+ LIST_HEAD_INIT(security_hook_heads.task_setrlimit),
+ .task_setscheduler =
+ LIST_HEAD_INIT(security_hook_heads.task_setscheduler),
+ .task_getscheduler =
+ LIST_HEAD_INIT(security_hook_heads.task_getscheduler),
+ .task_movememory =
+ LIST_HEAD_INIT(security_hook_heads.task_movememory),
+ .task_kill = LIST_HEAD_INIT(security_hook_heads.task_kill),
+ .task_wait = LIST_HEAD_INIT(security_hook_heads.task_wait),
+ .task_prctl = LIST_HEAD_INIT(security_hook_heads.task_prctl),
+ .task_to_inode =
+ LIST_HEAD_INIT(security_hook_heads.task_to_inode),
+ .ipc_permission =
+ LIST_HEAD_INIT(security_hook_heads.ipc_permission),
+ .ipc_getsecid = LIST_HEAD_INIT(security_hook_heads.ipc_getsecid),
+ .msg_msg_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.msg_msg_alloc_security),
+ .msg_msg_free_security =
+ LIST_HEAD_INIT(security_hook_heads.msg_msg_free_security),
+ .msg_queue_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.msg_queue_alloc_security),
+ .msg_queue_free_security =
+ LIST_HEAD_INIT(security_hook_heads.msg_queue_free_security),
+ .msg_queue_associate =
+ LIST_HEAD_INIT(security_hook_heads.msg_queue_associate),
+ .msg_queue_msgctl =
+ LIST_HEAD_INIT(security_hook_heads.msg_queue_msgctl),
+ .msg_queue_msgsnd =
+ LIST_HEAD_INIT(security_hook_heads.msg_queue_msgsnd),
+ .msg_queue_msgrcv =
+ LIST_HEAD_INIT(security_hook_heads.msg_queue_msgrcv),
+ .shm_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.shm_alloc_security),
+ .shm_free_security =
+ LIST_HEAD_INIT(security_hook_heads.shm_free_security),
+ .shm_associate =
+ LIST_HEAD_INIT(security_hook_heads.shm_associate),
+ .shm_shmctl = LIST_HEAD_INIT(security_hook_heads.shm_shmctl),
+ .shm_shmat = LIST_HEAD_INIT(security_hook_heads.shm_shmat),
+ .sem_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.sem_alloc_security),
+ .sem_free_security =
+ LIST_HEAD_INIT(security_hook_heads.sem_free_security),
+ .sem_associate =
+ LIST_HEAD_INIT(security_hook_heads.sem_associate),
+ .sem_semctl = LIST_HEAD_INIT(security_hook_heads.sem_semctl),
+ .sem_semop = LIST_HEAD_INIT(security_hook_heads.sem_semop),
+ .netlink_send = LIST_HEAD_INIT(security_hook_heads.netlink_send),
+ .d_instantiate =
+ LIST_HEAD_INIT(security_hook_heads.d_instantiate),
+ .getprocattr = LIST_HEAD_INIT(security_hook_heads.getprocattr),
+ .setprocattr = LIST_HEAD_INIT(security_hook_heads.setprocattr),
+ .ismaclabel = LIST_HEAD_INIT(security_hook_heads.ismaclabel),
+ .secid_to_secctx =
+ LIST_HEAD_INIT(security_hook_heads.secid_to_secctx),
+ .secctx_to_secid =
+ LIST_HEAD_INIT(security_hook_heads.secctx_to_secid),
+ .release_secctx =
+ LIST_HEAD_INIT(security_hook_heads.release_secctx),
+ .inode_notifysecctx =
+ LIST_HEAD_INIT(security_hook_heads.inode_notifysecctx),
+ .inode_setsecctx =
+ LIST_HEAD_INIT(security_hook_heads.inode_setsecctx),
+ .inode_getsecctx =
+ LIST_HEAD_INIT(security_hook_heads.inode_getsecctx),
+#ifdef CONFIG_SECURITY_NETWORK
+ .unix_stream_connect =
+ LIST_HEAD_INIT(security_hook_heads.unix_stream_connect),
+ .unix_may_send =
+ LIST_HEAD_INIT(security_hook_heads.unix_may_send),
+ .socket_create =
+ LIST_HEAD_INIT(security_hook_heads.socket_create),
+ .socket_post_create =
+ LIST_HEAD_INIT(security_hook_heads.socket_post_create),
+ .socket_bind = LIST_HEAD_INIT(security_hook_heads.socket_bind),
+ .socket_connect =
+ LIST_HEAD_INIT(security_hook_heads.socket_connect),
+ .socket_listen =
+ LIST_HEAD_INIT(security_hook_heads.socket_listen),
+ .socket_accept =
+ LIST_HEAD_INIT(security_hook_heads.socket_accept),
+ .socket_sendmsg =
+ LIST_HEAD_INIT(security_hook_heads.socket_sendmsg),
+ .socket_recvmsg =
+ LIST_HEAD_INIT(security_hook_heads.socket_recvmsg),
+ .socket_getsockname =
+ LIST_HEAD_INIT(security_hook_heads.socket_getsockname),
+ .socket_getpeername =
+ LIST_HEAD_INIT(security_hook_heads.socket_getpeername),
+ .socket_getsockopt =
+ LIST_HEAD_INIT(security_hook_heads.socket_getsockopt),
+ .socket_setsockopt =
+ LIST_HEAD_INIT(security_hook_heads.socket_setsockopt),
+ .socket_shutdown =
+ LIST_HEAD_INIT(security_hook_heads.socket_shutdown),
+ .socket_sock_rcv_skb =
+ LIST_HEAD_INIT(security_hook_heads.socket_sock_rcv_skb),
+ .socket_getpeersec_stream =
+ LIST_HEAD_INIT(security_hook_heads.socket_getpeersec_stream),
+ .socket_getpeersec_dgram =
+ LIST_HEAD_INIT(security_hook_heads.socket_getpeersec_dgram),
+ .sk_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.sk_alloc_security),
+ .sk_free_security =
+ LIST_HEAD_INIT(security_hook_heads.sk_free_security),
+ .sk_clone_security =
+ LIST_HEAD_INIT(security_hook_heads.sk_clone_security),
+ .sk_getsecid = LIST_HEAD_INIT(security_hook_heads.sk_getsecid),
+ .sock_graft = LIST_HEAD_INIT(security_hook_heads.sock_graft),
+ .inet_conn_request =
+ LIST_HEAD_INIT(security_hook_heads.inet_conn_request),
+ .inet_csk_clone =
+ LIST_HEAD_INIT(security_hook_heads.inet_csk_clone),
+ .inet_conn_established =
+ LIST_HEAD_INIT(security_hook_heads.inet_conn_established),
+ .secmark_relabel_packet =
+ LIST_HEAD_INIT(security_hook_heads.secmark_relabel_packet),
+ .secmark_refcount_inc =
+ LIST_HEAD_INIT(security_hook_heads.secmark_refcount_inc),
+ .secmark_refcount_dec =
+ LIST_HEAD_INIT(security_hook_heads.secmark_refcount_dec),
+ .req_classify_flow =
+ LIST_HEAD_INIT(security_hook_heads.req_classify_flow),
+ .tun_dev_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.tun_dev_alloc_security),
+ .tun_dev_free_security =
+ LIST_HEAD_INIT(security_hook_heads.tun_dev_free_security),
+ .tun_dev_create =
+ LIST_HEAD_INIT(security_hook_heads.tun_dev_create),
+ .tun_dev_attach_queue =
+ LIST_HEAD_INIT(security_hook_heads.tun_dev_attach_queue),
+ .tun_dev_attach =
+ LIST_HEAD_INIT(security_hook_heads.tun_dev_attach),
+ .tun_dev_open = LIST_HEAD_INIT(security_hook_heads.tun_dev_open),
+ .skb_owned_by = LIST_HEAD_INIT(security_hook_heads.skb_owned_by),
+#endif /* CONFIG_SECURITY_NETWORK */
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+ .xfrm_policy_alloc_security =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_policy_alloc_security),
+ .xfrm_policy_clone_security =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_policy_clone_security),
+ .xfrm_policy_free_security =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_policy_free_security),
+ .xfrm_policy_delete_security =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_policy_delete_security),
+ .xfrm_state_alloc =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_state_alloc),
+ .xfrm_state_alloc_acquire =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_state_alloc_acquire),
+ .xfrm_state_free_security =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_state_free_security),
+ .xfrm_state_delete_security =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_state_delete_security),
+ .xfrm_policy_lookup =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_policy_lookup),
+ .xfrm_state_pol_flow_match =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_state_pol_flow_match),
+ .xfrm_decode_session =
+ LIST_HEAD_INIT(security_hook_heads.xfrm_decode_session),
+#endif /* CONFIG_SECURITY_NETWORK_XFRM */
+#ifdef CONFIG_KEYS
+ .key_alloc = LIST_HEAD_INIT(security_hook_heads.key_alloc),
+ .key_free = LIST_HEAD_INIT(security_hook_heads.key_free),
+ .key_permission =
+ LIST_HEAD_INIT(security_hook_heads.key_permission),
+ .key_getsecurity =
+ LIST_HEAD_INIT(security_hook_heads.key_getsecurity),
+#endif /* CONFIG_KEYS */
+#ifdef CONFIG_AUDIT
+ .audit_rule_init =
+ LIST_HEAD_INIT(security_hook_heads.audit_rule_init),
+ .audit_rule_known =
+ LIST_HEAD_INIT(security_hook_heads.audit_rule_known),
+ .audit_rule_match =
+ LIST_HEAD_INIT(security_hook_heads.audit_rule_match),
+ .audit_rule_free =
+ LIST_HEAD_INIT(security_hook_heads.audit_rule_free),
#endif /* CONFIG_AUDIT */
+};
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 0cf105f..06c9dd9 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1990,12 +1990,6 @@ static int selinux_binder_transfer_file(struct task_struct *from,
static int selinux_ptrace_access_check(struct task_struct *child,
unsigned int mode)
{
- int rc;
-
- rc = cap_ptrace_access_check(child, mode);
- if (rc)
- return rc;
-
if (mode & PTRACE_MODE_READ) {
u32 sid = current_sid();
u32 csid = task_sid(child);
@@ -2007,25 +2001,13 @@ static int selinux_ptrace_access_check(struct task_struct *child,
static int selinux_ptrace_traceme(struct task_struct *parent)
{
- int rc;
-
- rc = cap_ptrace_traceme(parent);
- if (rc)
- return rc;
-
return task_has_perm(parent, current, PROCESS__PTRACE);
}
static int selinux_capget(struct task_struct *target, kernel_cap_t *effective,
kernel_cap_t *inheritable, kernel_cap_t *permitted)
{
- int error;
-
- error = current_has_perm(target, PROCESS__GETCAP);
- if (error)
- return error;
-
- return cap_capget(target, effective, inheritable, permitted);
+ return current_has_perm(target, PROCESS__GETCAP);
}
static int selinux_capset(struct cred *new, const struct cred *old,
@@ -2033,13 +2015,6 @@ static int selinux_capset(struct cred *new, const struct cred *old,
const kernel_cap_t *inheritable,
const kernel_cap_t *permitted)
{
- int error;
-
- error = cap_capset(new, old,
- effective, inheritable, permitted);
- if (error)
- return error;
-
return cred_has_perm(old, new, PROCESS__SETCAP);
}
@@ -2056,12 +2031,6 @@ static int selinux_capset(struct cred *new, const struct cred *old,
static int selinux_capable(const struct cred *cred, struct user_namespace *ns,
int cap, int audit)
{
- int rc;
-
- rc = cap_capable(cred, ns, cap, audit);
- if (rc)
- return rc;
-
return cred_has_capability(cred, cap, audit);
}
@@ -2139,12 +2108,12 @@ static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
{
int rc, cap_sys_admin = 0;
- rc = selinux_capable(current_cred(), &init_user_ns, CAP_SYS_ADMIN,
- SECURITY_CAP_NOAUDIT);
+ rc = cred_has_capability(current_cred(), CAP_SYS_ADMIN,
+ SECURITY_CAP_NOAUDIT);
if (rc == 0)
cap_sys_admin = 1;
- return __vm_enough_memory(mm, pages, cap_sys_admin);
+ return cap_sys_admin;
}
/* binprm security operations */
@@ -2193,10 +2162,6 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
struct inode *inode = file_inode(bprm->file);
int rc;
- rc = cap_bprm_set_creds(bprm);
- if (rc)
- return rc;
-
/* SELinux context only depends on initial program or script and not
* the script interpreter */
if (bprm->cred_prepared)
@@ -2320,7 +2285,7 @@ static int selinux_bprm_secureexec(struct linux_binprm *bprm)
PROCESS__NOATSECURE, NULL);
}
- return (atsecure || cap_bprm_secureexec(bprm));
+ return !!atsecure;
}
static int match_file(const void *p, struct file *file, unsigned fd)
@@ -3132,8 +3097,11 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
* and lack of permission just means that we fall back to the
* in-core context value, not a denial.
*/
- error = selinux_capable(current_cred(), &init_user_ns, CAP_MAC_ADMIN,
- SECURITY_CAP_NOAUDIT);
+ error = cap_capable(current_cred(), &init_user_ns, CAP_MAC_ADMIN,
+ SECURITY_CAP_NOAUDIT);
+ if (!error)
+ error = cred_has_capability(current_cred(), CAP_MAC_ADMIN,
+ SECURITY_CAP_NOAUDIT);
if (!error)
error = security_sid_to_context_force(isec->sid, &context,
&size);
@@ -3318,12 +3286,7 @@ error:
static int selinux_mmap_addr(unsigned long addr)
{
- int rc;
-
- /* do DAC check on address space usage */
- rc = cap_mmap_addr(addr);
- if (rc)
- return rc;
+ int rc = 0;
if (addr < CONFIG_LSM_MMAP_MIN_ADDR) {
u32 sid = current_sid();
@@ -3639,23 +3602,11 @@ static void selinux_task_getsecid(struct task_struct *p, u32 *secid)
static int selinux_task_setnice(struct task_struct *p, int nice)
{
- int rc;
-
- rc = cap_task_setnice(p, nice);
- if (rc)
- return rc;
-
return current_has_perm(p, PROCESS__SETSCHED);
}
static int selinux_task_setioprio(struct task_struct *p, int ioprio)
{
- int rc;
-
- rc = cap_task_setioprio(p, ioprio);
- if (rc)
- return rc;
-
return current_has_perm(p, PROCESS__SETSCHED);
}
@@ -3681,12 +3632,6 @@ static int selinux_task_setrlimit(struct task_struct *p, unsigned int resource,
static int selinux_task_setscheduler(struct task_struct *p)
{
- int rc;
-
- rc = cap_task_setscheduler(p);
- if (rc)
- return rc;
-
return current_has_perm(p, PROCESS__SETSCHED);
}
@@ -5097,12 +5042,6 @@ static unsigned int selinux_ipv6_postroute(const struct nf_hook_ops *ops,
static int selinux_netlink_send(struct sock *sk, struct sk_buff *skb)
{
- int err;
-
- err = cap_netlink_send(sk, skb);
- if (err)
- return err;
-
return selinux_nlmsg_perm(sk, skb);
}
@@ -5840,9 +5779,7 @@ static int selinux_key_getsecurity(struct key *key, char **_buffer)
#endif
-static struct security_operations selinux_ops = {
- LSM_HOOK_INIT(name, "selinux"),
-
+static struct security_hook_list selinux_hooks[] = {
LSM_HOOK_INIT(binder_set_context_mgr, selinux_binder_set_context_mgr),
LSM_HOOK_INIT(binder_transaction, selinux_binder_transaction),
LSM_HOOK_INIT(binder_transfer_binder, selinux_binder_transfer_binder),
@@ -6055,7 +5992,7 @@ static struct security_operations selinux_ops = {
static __init int selinux_init(void)
{
- if (!security_module_enable(&selinux_ops)) {
+ if (!security_module_enable("selinux")) {
selinux_enabled = 0;
return 0;
}
@@ -6077,8 +6014,7 @@ static __init int selinux_init(void)
0, SLAB_PANIC, NULL);
avc_init();
- if (register_security(&selinux_ops))
- panic("SELinux: Unable to register with kernel.\n");
+ security_add_hooks(selinux_hooks, ARRAY_SIZE(selinux_hooks));
if (avc_add_callback(selinux_netcache_avc_callback, AVC_CALLBACK_RESET))
panic("SELinux: Unable to register AVC netcache callback\n");
@@ -6206,7 +6142,7 @@ int selinux_disable(void)
selinux_disabled = 1;
selinux_enabled = 0;
- reset_security_ops();
+ security_delete_hooks(selinux_hooks, ARRAY_SIZE(selinux_hooks));
/* Try to destroy the avc node cache */
avc_disable();
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 262dad8..b8c1a86 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -276,8 +276,6 @@ extern struct mutex smack_known_lock;
extern struct list_head smack_known_list;
extern struct list_head smk_netlbladdr_list;
-extern struct security_operations smack_ops;
-
#define SMACK_HASH_SLOTS 16
extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 4313bf4..5eae42c 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -436,17 +436,11 @@ static int smk_ptrace_rule_check(struct task_struct *tracer,
*/
static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
{
- int rc;
struct smack_known *skp;
- rc = cap_ptrace_access_check(ctp, mode);
- if (rc != 0)
- return rc;
-
skp = smk_of_task_struct(ctp);
- rc = smk_ptrace_rule_check(current, skp, mode, __func__);
- return rc;
+ return smk_ptrace_rule_check(current, skp, mode, __func__);
}
/**
@@ -462,10 +456,6 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
int rc;
struct smack_known *skp;
- rc = cap_ptrace_traceme(ptp);
- if (rc != 0)
- return rc;
-
skp = smk_of_task(current_security());
rc = smk_ptrace_rule_check(ptp, skp, PTRACE_MODE_ATTACH, __func__);
@@ -721,10 +711,6 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
struct inode_smack *isp;
int rc;
- rc = cap_bprm_set_creds(bprm);
- if (rc != 0)
- return rc;
-
if (bprm->cred_prepared)
return 0;
@@ -779,12 +765,11 @@ static void smack_bprm_committing_creds(struct linux_binprm *bprm)
static int smack_bprm_secureexec(struct linux_binprm *bprm)
{
struct task_smack *tsp = current_security();
- int ret = cap_bprm_secureexec(bprm);
- if (!ret && (tsp->smk_task != tsp->smk_forked))
- ret = 1;
+ if (tsp->smk_task != tsp->smk_forked)
+ return 1;
- return ret;
+ return 0;
}
/*
@@ -1934,12 +1919,7 @@ static void smack_task_getsecid(struct task_struct *p, u32 *secid)
*/
static int smack_task_setnice(struct task_struct *p, int nice)
{
- int rc;
-
- rc = cap_task_setnice(p, nice);
- if (rc == 0)
- rc = smk_curacc_on_task(p, MAY_WRITE, __func__);
- return rc;
+ return smk_curacc_on_task(p, MAY_WRITE, __func__);
}
/**
@@ -1951,12 +1931,7 @@ static int smack_task_setnice(struct task_struct *p, int nice)
*/
static int smack_task_setioprio(struct task_struct *p, int ioprio)
{
- int rc;
-
- rc = cap_task_setioprio(p, ioprio);
- if (rc == 0)
- rc = smk_curacc_on_task(p, MAY_WRITE, __func__);
- return rc;
+ return smk_curacc_on_task(p, MAY_WRITE, __func__);
}
/**
@@ -1980,12 +1955,7 @@ static int smack_task_getioprio(struct task_struct *p)
*/
static int smack_task_setscheduler(struct task_struct *p)
{
- int rc;
-
- rc = cap_task_setscheduler(p);
- if (rc == 0)
- rc = smk_curacc_on_task(p, MAY_WRITE, __func__);
- return rc;
+ return smk_curacc_on_task(p, MAY_WRITE, __func__);
}
/**
@@ -4266,9 +4236,7 @@ static int smack_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
return 0;
}
-struct security_operations smack_ops = {
- LSM_HOOK_INIT(name, "smack"),
-
+struct security_hook_list smack_hooks[] = {
LSM_HOOK_INIT(ptrace_access_check, smack_ptrace_access_check),
LSM_HOOK_INIT(ptrace_traceme, smack_ptrace_traceme),
LSM_HOOK_INIT(syslog, smack_syslog),
@@ -4451,7 +4419,7 @@ static __init int smack_init(void)
struct cred *cred;
struct task_smack *tsp;
- if (!security_module_enable(&smack_ops))
+ if (!security_module_enable("smack"))
return 0;
smack_enabled = 1;
@@ -4481,8 +4449,7 @@ static __init int smack_init(void)
/*
* Register with LSM
*/
- if (register_security(&smack_ops))
- panic("smack: Unable to register with kernel.\n");
+ security_add_hooks(smack_hooks, ARRAY_SIZE(smack_hooks));
return 0;
}
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index d968298..4aa12c8 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -2547,7 +2547,7 @@ static int __init init_smk_fs(void)
int err;
int rc;
- if (!security_module_enable(&smack_ops))
+ if (!security_module_enable("smack"))
return 0;
err = smk_init_sysfs();
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index bce1358..cbf3df4 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -72,12 +72,6 @@ static void tomoyo_cred_free(struct cred *cred)
*/
static int tomoyo_bprm_set_creds(struct linux_binprm *bprm)
{
- int rc;
-
- rc = cap_bprm_set_creds(bprm);
- if (rc)
- return rc;
-
/*
* Do only if this function is called for the first time of an execve
* operation.
@@ -502,8 +496,7 @@ static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg,
* tomoyo_security_ops is a "struct security_operations" which is used for
* registering TOMOYO.
*/
-static struct security_operations tomoyo_security_ops = {
- LSM_HOOK_INIT(name, "tomoyo"),
+static struct security_hook_list tomoyo_hooks[] = {
LSM_HOOK_INIT(cred_alloc_blank, tomoyo_cred_alloc_blank),
LSM_HOOK_INIT(cred_prepare, tomoyo_cred_prepare),
LSM_HOOK_INIT(cred_transfer, tomoyo_cred_transfer),
@@ -546,11 +539,10 @@ static int __init tomoyo_init(void)
{
struct cred *cred = (struct cred *) current_cred();
- if (!security_module_enable(&tomoyo_security_ops))
+ if (!security_module_enable("tomoyo"))
return 0;
/* register ourselves with the security framework */
- if (register_security(&tomoyo_security_ops))
- panic("Failure registering TOMOYO Linux");
+ security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks));
printk(KERN_INFO "TOMOYO Linux initialized\n");
cred->security = &tomoyo_kernel_domain;
tomoyo_mm_init();
diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c
index 23dd4c6..9ed3250 100644
--- a/security/yama/yama_lsm.c
+++ b/security/yama/yama_lsm.c
@@ -154,13 +154,9 @@ void yama_task_free(struct task_struct *task)
int yama_task_prctl(int option, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5)
{
- int rc;
+ int rc = -ENOSYS;
struct task_struct *myself = current;
- rc = cap_task_prctl(option, arg2, arg3, arg4, arg5);
- if (rc != -ENOSYS)
- return rc;
-
switch (option) {
case PR_SET_PTRACER:
/* Since a thread can call prctl(), find the group leader
@@ -279,17 +275,10 @@ static int ptracer_exception_found(struct task_struct *tracer,
*
* Returns 0 if following the ptrace is allowed, -ve on error.
*/
-int yama_ptrace_access_check(struct task_struct *child,
+static int yama_ptrace_access_check(struct task_struct *child,
unsigned int mode)
{
- int rc;
-
- /* If standard caps disallows it, so does Yama. We should
- * only tighten restrictions further.
- */
- rc = cap_ptrace_access_check(child, mode);
- if (rc)
- return rc;
+ int rc = 0;
/* require ptrace target be a child of ptracer on attach */
if (mode == PTRACE_MODE_ATTACH) {
@@ -335,14 +324,7 @@ int yama_ptrace_access_check(struct task_struct *child,
*/
int yama_ptrace_traceme(struct task_struct *parent)
{
- int rc;
-
- /* If standard caps disallows it, so does Yama. We should
- * only tighten restrictions further.
- */
- rc = cap_ptrace_traceme(parent);
- if (rc)
- return rc;
+ int rc = 0;
/* Only disallow PTRACE_TRACEME on more aggressive settings. */
switch (ptrace_scope) {
@@ -364,16 +346,17 @@ int yama_ptrace_traceme(struct task_struct *parent)
return rc;
}
-#ifndef CONFIG_SECURITY_YAMA_STACKED
-static struct security_operations yama_ops = {
- LSM_HOOK_INIT(name, "yama"),
-
+static struct security_hook_list yama_hooks[] = {
LSM_HOOK_INIT(ptrace_access_check, yama_ptrace_access_check),
LSM_HOOK_INIT(ptrace_traceme, yama_ptrace_traceme),
LSM_HOOK_INIT(task_prctl, yama_task_prctl),
LSM_HOOK_INIT(task_free, yama_task_free),
};
-#endif
+
+void __init yama_add_hooks(void)
+{
+ security_add_hooks(yama_hooks, ARRAY_SIZE(yama_hooks));
+}
#ifdef CONFIG_SYSCTL
static int yama_dointvec_minmax(struct ctl_table *table, int write,
@@ -418,16 +401,13 @@ static struct ctl_table yama_sysctl_table[] = {
static __init int yama_init(void)
{
#ifndef CONFIG_SECURITY_YAMA_STACKED
- if (!security_module_enable(&yama_ops))
+ /*
+ * If yama is being stacked this is already taken care of.
+ */
+ if (!security_module_enable("yama"))
return 0;
#endif
-
- printk(KERN_INFO "Yama: becoming mindful.\n");
-
-#ifndef CONFIG_SECURITY_YAMA_STACKED
- if (register_security(&yama_ops))
- panic("Yama: kernel registration failed.\n");
-#endif
+ pr_info("Yama: becoming mindful.\n");
#ifdef CONFIG_SYSCTL
if (!register_sysctl_paths(yama_sysctl_path, yama_sysctl_table))
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