LSM/Audit: Introduce generic Audit LSM hooks

[mv-sheeva.git] / security / dummy.c

diff --git a/security/dummy.c b/security/dummy.c
index 6d895ade73de485d9ceab48a28094068550e79b0..1ac9f8e66aa2970a6905c582520ac92123dc932b 100644 (file)
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -36,14 +36,19 @@ static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
 static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
                         kernel_cap_t * inheritable, kernel_cap_t * permitted)
 {
-       *effective = *inheritable = *permitted = 0;
        if (target->euid == 0) {
-               *permitted |= (~0 & ~CAP_FS_MASK);
-               *effective |= (~0 & ~CAP_TO_MASK(CAP_SETPCAP) & ~CAP_FS_MASK);
+               cap_set_full(*permitted);
+               cap_set_init_eff(*effective);
+       } else {
+               cap_clear(*permitted);
+               cap_clear(*effective);
        }
-       if (target->fsuid == 0) {
-               *permitted |= CAP_FS_MASK;
-               *effective |= CAP_FS_MASK;
+
+       cap_clear(*inheritable);
+
+       if (target->fsuid != 0) {
+               *permitted = cap_drop_fs_set(*permitted);
+               *effective = cap_drop_fs_set(*effective);
        }
        return 0;
 }
@@ -176,8 +181,7 @@ static void dummy_sb_free_security (struct super_block *sb)
        return;
 }
 
-static int dummy_sb_copy_data (struct file_system_type *type,
-                              void *orig, void *copy)
+static int dummy_sb_copy_data (char *orig, char *copy)
 {
        return 0;
 }
@@ -225,26 +229,47 @@ static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
 }
 
 
-static void dummy_sb_post_mountroot (void)
+static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
 {
        return;
 }
 
-static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
+static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
+{
+       return 0;
+}
+
+static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
 {
        return;
 }
 
-static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
+static int dummy_sb_get_mnt_opts(const struct super_block *sb,
+                                struct security_mnt_opts *opts)
 {
+       security_init_mnt_opts(opts);
        return 0;
 }
 
-static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
+static int dummy_sb_set_mnt_opts(struct super_block *sb,
+                                struct security_mnt_opts *opts)
+{
+       if (unlikely(opts->num_mnt_opts))
+               return -EOPNOTSUPP;
+       return 0;
+}
+
+static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
+                                   struct super_block *newsb)
 {
        return;
 }
 
+static int dummy_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
+{
+       return 0;
+}
+
 static int dummy_inode_alloc_security (struct inode *inode)
 {
        return 0;
@@ -384,7 +409,7 @@ static int dummy_inode_killpriv(struct dentry *dentry)
        return 0;
 }
 
-static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
+static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
 {
        return -EOPNOTSUPP;
 }
@@ -399,6 +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;
@@ -426,7 +456,7 @@ static int dummy_file_mmap (struct file *file, unsigned long reqprot,
                            unsigned long addr,
                            unsigned long addr_only)
 {
-       if (addr < mmap_min_addr)
+       if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
                return -EACCES;
        return 0;
 }
@@ -517,7 +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)
 {
@@ -591,6 +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;
@@ -928,6 +965,11 @@ static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
        return -EOPNOTSUPP;
 }
 
+static int dummy_secctx_to_secid(char *secdata, u32 seclen, u32 *secid)
+{
+       return -EOPNOTSUPP;
+}
+
 static void dummy_release_secctx(char *secdata, u32 seclen)
 {
 }
@@ -951,6 +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)                            \
@@ -994,10 +1060,13 @@ void security_fixup_ops (struct security_operations *ops)
        set_to_dummy_if_null(ops, sb_umount_close);
        set_to_dummy_if_null(ops, sb_umount_busy);
        set_to_dummy_if_null(ops, sb_post_remount);
-       set_to_dummy_if_null(ops, sb_post_mountroot);
        set_to_dummy_if_null(ops, sb_post_addmount);
        set_to_dummy_if_null(ops, sb_pivotroot);
        set_to_dummy_if_null(ops, sb_post_pivotroot);
+       set_to_dummy_if_null(ops, sb_get_mnt_opts);
+       set_to_dummy_if_null(ops, sb_set_mnt_opts);
+       set_to_dummy_if_null(ops, sb_clone_mnt_opts);
+       set_to_dummy_if_null(ops, sb_parse_opts_str);
        set_to_dummy_if_null(ops, inode_alloc_security);
        set_to_dummy_if_null(ops, inode_free_security);
        set_to_dummy_if_null(ops, inode_init_security);
@@ -1025,6 +1094,7 @@ 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);
@@ -1061,6 +1131,7 @@ 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);
@@ -1086,6 +1157,7 @@ void security_fixup_ops (struct security_operations *ops)
        set_to_dummy_if_null(ops, getprocattr);
        set_to_dummy_if_null(ops, setprocattr);
        set_to_dummy_if_null(ops, secid_to_secctx);
+       set_to_dummy_if_null(ops, secctx_to_secid);
        set_to_dummy_if_null(ops, release_secctx);
 #ifdef CONFIG_SECURITY_NETWORK
        set_to_dummy_if_null(ops, unix_stream_connect);
@@ -1134,6 +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
 }