Merge branch 'sh/for-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...

[pandora-kernel.git] / security / selinux / hooks.c

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 63f131f..03fc6a8 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -25,7 +25,7 @@
 
 #include <linux/init.h>
 #include <linux/kernel.h>
-#include <linux/ptrace.h>
+#include <linux/tracehook.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/security.h>
@@ -998,8 +998,12 @@ static int selinux_sb_show_options(struct seq_file *m, struct super_block *sb)
        int rc;
 
        rc = selinux_get_mnt_opts(sb, &opts);
-       if (rc)
+       if (rc) {
+               /* before policy load we may get EINVAL, don't show anything */
+               if (rc == -EINVAL)
+                       rc = 0;
                return rc;
+       }
 
        selinux_write_opts(m, &opts);
 
@@ -1734,24 +1738,34 @@ static inline u32 file_to_av(struct file *file)
 
 /* Hook functions begin here. */
 
-static int selinux_ptrace(struct task_struct *parent,
-                         struct task_struct *child,
-                         unsigned int mode)
+static int selinux_ptrace_may_access(struct task_struct *child,
+                                    unsigned int mode)
 {
        int rc;
 
-       rc = secondary_ops->ptrace(parent, child, mode);
+       rc = secondary_ops->ptrace_may_access(child, mode);
        if (rc)
                return rc;
 
        if (mode == PTRACE_MODE_READ) {
-               struct task_security_struct *tsec = parent->security;
+               struct task_security_struct *tsec = current->security;
                struct task_security_struct *csec = child->security;
                return avc_has_perm(tsec->sid, csec->sid,
                                    SECCLASS_FILE, FILE__READ, NULL);
        }
 
-       return task_has_perm(parent, child, PROCESS__PTRACE);
+       return task_has_perm(current, child, PROCESS__PTRACE);
+}
+
+static int selinux_ptrace_traceme(struct task_struct *parent)
+{
+       int rc;
+
+       rc = secondary_ops->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,
@@ -1971,22 +1985,6 @@ static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
        return __vm_enough_memory(mm, pages, cap_sys_admin);
 }
 
-/**
- * task_tracer_task - return the task that is tracing the given task
- * @task:              task to consider
- *
- * Returns NULL if noone is tracing @task, or the &struct task_struct
- * pointer to its tracer.
- *
- * Must be called under rcu_read_lock().
- */
-static struct task_struct *task_tracer_task(struct task_struct *task)
-{
-       if (task->ptrace & PT_PTRACED)
-               return rcu_dereference(task->parent);
-       return NULL;
-}
-
 /* binprm security operations */
 
 static int selinux_bprm_alloc_security(struct linux_binprm *bprm)
@@ -2238,7 +2236,7 @@ static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
                        u32 ptsid = 0;
 
                        rcu_read_lock();
-                       tracer = task_tracer_task(current);
+                       tracer = tracehook_tracer_task(current);
                        if (likely(tracer != NULL)) {
                                sec = tracer->security;
                                ptsid = sec->sid;
@@ -2640,12 +2638,11 @@ static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *na
        return dentry_has_perm(current, NULL, dentry, FILE__READ);
 }
 
-static int selinux_inode_permission(struct inode *inode, int mask,
-                                   struct nameidata *nd)
+static int selinux_inode_permission(struct inode *inode, int mask)
 {
        int rc;
 
-       rc = secondary_ops->inode_permission(inode, mask, nd);
+       rc = secondary_ops->inode_permission(inode, mask);
        if (rc)
                return rc;
 
@@ -5247,7 +5244,7 @@ static int selinux_setprocattr(struct task_struct *p,
                   Otherwise, leave SID unchanged and fail. */
                task_lock(p);
                rcu_read_lock();
-               tracer = task_tracer_task(p);
+               tracer = tracehook_tracer_task(p);
                if (tracer != NULL) {
                        struct task_security_struct *ptsec = tracer->security;
                        u32 ptsid = ptsec->sid;
@@ -5359,7 +5356,8 @@ static int selinux_key_getsecurity(struct key *key, char **_buffer)
 static struct security_operations selinux_ops = {
        .name =                         "selinux",
 
-       .ptrace =                       selinux_ptrace,
+       .ptrace_may_access =            selinux_ptrace_may_access,
+       .ptrace_traceme =               selinux_ptrace_traceme,
        .capget =                       selinux_capget,
        .capset_check =                 selinux_capset_check,
        .capset_set =                   selinux_capset_set,
@@ -5670,27 +5668,20 @@ static struct nf_hook_ops selinux_ipv6_ops[] = {
 static int __init selinux_nf_ip_init(void)
 {
        int err = 0;
-       u32 iter;
 
        if (!selinux_enabled)
                goto out;
 
        printk(KERN_DEBUG "SELinux:  Registering netfilter hooks\n");
 
-       for (iter = 0; iter < ARRAY_SIZE(selinux_ipv4_ops); iter++) {
-               err = nf_register_hook(&selinux_ipv4_ops[iter]);
-               if (err)
-                       panic("SELinux: nf_register_hook for IPv4: error %d\n",
-                             err);
-       }
+       err = nf_register_hooks(selinux_ipv4_ops, ARRAY_SIZE(selinux_ipv4_ops));
+       if (err)
+               panic("SELinux: nf_register_hooks for IPv4: error %d\n", err);
 
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-       for (iter = 0; iter < ARRAY_SIZE(selinux_ipv6_ops); iter++) {
-               err = nf_register_hook(&selinux_ipv6_ops[iter]);
-               if (err)
-                       panic("SELinux: nf_register_hook for IPv6: error %d\n",
-                             err);
-       }
+       err = nf_register_hooks(selinux_ipv6_ops, ARRAY_SIZE(selinux_ipv6_ops));
+       if (err)
+               panic("SELinux: nf_register_hooks for IPv6: error %d\n", err);
 #endif /* IPV6 */
 
 out:
@@ -5702,15 +5693,11 @@ __initcall(selinux_nf_ip_init);
 #ifdef CONFIG_SECURITY_SELINUX_DISABLE
 static void selinux_nf_ip_exit(void)
 {
-       u32 iter;
-
        printk(KERN_DEBUG "SELinux:  Unregistering netfilter hooks\n");
 
-       for (iter = 0; iter < ARRAY_SIZE(selinux_ipv4_ops); iter++)
-               nf_unregister_hook(&selinux_ipv4_ops[iter]);
+       nf_unregister_hooks(selinux_ipv4_ops, ARRAY_SIZE(selinux_ipv4_ops));
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-       for (iter = 0; iter < ARRAY_SIZE(selinux_ipv6_ops); iter++)
-               nf_unregister_hook(&selinux_ipv6_ops[iter]);
+       nf_unregister_hooks(selinux_ipv6_ops, ARRAY_SIZE(selinux_ipv6_ops));
 #endif /* IPV6 */
 }
 #endif