security: Fix setting of PF_SUPERPRIV by __capable()

[deliverable/linux.git] / security / selinux / hooks.c

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 3481cde5bf15f018fac6d83cd100968d6b701c5b..03fc6a81ae32bd783ddd96eca85f118a2ba79bd8 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -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,
@@ -2624,12 +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;
 
@@ -5343,7 +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,
@@ -5654,27 +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:
@@ -5686,15 +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