*
* Copyright (C) 2001,2002 Networks Associates Technology, Inc.
* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
+ * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
+ * <dgoeddel@trustedcs.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2,
#include <linux/hugetlb.h>
#include <linux/personality.h>
#include <linux/sysctl.h>
+#include <linux/audit.h>
#include "avc.h"
#include "objsec.h"
spin_unlock(&sbsec->isec_lock);
inode = igrab(inode);
if (inode) {
- inode_doinit(inode);
+ if (!IS_PRIVATE (inode))
+ inode_doinit(inode);
iput(inode);
}
spin_lock(&sbsec->isec_lock);
return SECCLASS_NETLINK_IP6FW_SOCKET;
case NETLINK_DNRTMSG:
return SECCLASS_NETLINK_DNRT_SOCKET;
+ case NETLINK_KOBJECT_UEVENT:
+ return SECCLASS_NETLINK_KOBJECT_UEVENT_SOCKET;
default:
return SECCLASS_NETLINK_SOCKET;
}
__FUNCTION__, context, -rc,
inode->i_sb->s_id, inode->i_ino);
kfree(context);
- goto out;
+ /* Leave with the unlabeled SID */
+ rc = 0;
+ break;
}
}
kfree(context);
isec->initialized = 1;
out:
- if (inode->i_sock) {
- struct socket *sock = SOCKET_I(inode);
- if (sock->sk) {
- isec->sclass = socket_type_to_security_class(sock->sk->sk_family,
- sock->sk->sk_type,
- sock->sk->sk_protocol);
- } else {
- isec->sclass = SECCLASS_SOCKET;
- }
- } else {
+ if (isec->sclass == SECCLASS_FILE)
isec->sclass = inode_mode_to_security_class(inode->i_mode);
- }
if (hold_sem)
up(&isec->sem);
/* Check permission betweeen a pair of tasks, e.g. signal checks,
fork check, ptrace check, etc. */
-int task_has_perm(struct task_struct *tsk1,
- struct task_struct *tsk2,
- u32 perms)
+static int task_has_perm(struct task_struct *tsk1,
+ struct task_struct *tsk2,
+ u32 perms)
{
struct task_security_struct *tsec1, *tsec2;
}
/* Check whether a task is allowed to use a capability. */
-int task_has_capability(struct task_struct *tsk,
- int cap)
+static int task_has_capability(struct task_struct *tsk,
+ int cap)
{
struct task_security_struct *tsec;
struct avc_audit_data ad;
}
/* Check whether a task is allowed to use a system operation. */
-int task_has_system(struct task_struct *tsk,
- u32 perms)
+static int task_has_system(struct task_struct *tsk,
+ u32 perms)
{
struct task_security_struct *tsec;
/* Check whether a task has a particular permission to an inode.
The 'adp' parameter is optional and allows other audit
data to be passed (e.g. the dentry). */
-int inode_has_perm(struct task_struct *tsk,
- struct inode *inode,
- u32 perms,
- struct avc_audit_data *adp)
+static int inode_has_perm(struct task_struct *tsk,
+ struct inode *inode,
+ u32 perms,
+ struct avc_audit_data *adp)
{
struct task_security_struct *tsec;
struct inode_security_struct *isec;
}
/* Check whether a task can perform a filesystem operation. */
-int superblock_has_perm(struct task_struct *tsk,
- struct super_block *sb,
- u32 perms,
- struct avc_audit_data *ad)
+static int superblock_has_perm(struct task_struct *tsk,
+ struct super_block *sb,
+ u32 perms,
+ struct avc_audit_data *ad)
{
struct task_security_struct *tsec;
struct superblock_security_struct *sbsec;
}
/* Set an inode's SID to a specified value. */
-int inode_security_set_sid(struct inode *inode, u32 sid)
+static int inode_security_set_sid(struct inode *inode, u32 sid)
{
struct inode_security_struct *isec = inode->i_security;
struct superblock_security_struct *sbsec = inode->i_sb->s_security;
initrlim = init_task.signal->rlim+i;
rlim->rlim_cur = min(rlim->rlim_max,initrlim->rlim_cur);
}
+ if (current->signal->rlim[RLIMIT_CPU].rlim_cur != RLIM_INFINITY) {
+ /*
+ * This will cause RLIMIT_CPU calculations
+ * to be refigured.
+ */
+ current->it_prof_expires = jiffies_to_cputime(1);
+ }
}
/* Wake up the parent if it is waiting so that it can
if (rc)
return rc;
+ rc = security_validate_transition(isec->sid, newsid, tsec->sid,
+ isec->sclass);
+ if (rc)
+ return rc;
+
return avc_has_perm(newsid,
sbsec->sid,
SECCLASS_FILESYSTEM,
static int file_map_prot_check(struct file *file, unsigned long prot, int shared)
{
+#ifndef CONFIG_PPC32
if ((prot & PROT_EXEC) && (!file || (!shared && (prot & PROT_WRITE)))) {
/*
* We are making executable an anonymous mapping or a
if (rc)
return rc;
}
+#endif
if (file) {
/* read access is always possible with a mapping */
return 0;
}
-static int selinux_file_mmap(struct file *file, unsigned long prot, unsigned long flags)
+static int selinux_file_mmap(struct file *file, unsigned long reqprot,
+ unsigned long prot, unsigned long flags)
{
int rc;
- rc = secondary_ops->file_mmap(file, prot, flags);
+ rc = secondary_ops->file_mmap(file, reqprot, prot, flags);
if (rc)
return rc;
+ if (selinux_checkreqprot)
+ prot = reqprot;
+
return file_map_prot_check(file, prot,
(flags & MAP_TYPE) == MAP_SHARED);
}
static int selinux_file_mprotect(struct vm_area_struct *vma,
+ unsigned long reqprot,
unsigned long prot)
{
int rc;
- rc = secondary_ops->file_mprotect(vma, prot);
+ rc = secondary_ops->file_mprotect(vma, reqprot, prot);
if (rc)
return rc;
+ if (selinux_checkreqprot)
+ prot = reqprot;
+
+#ifndef CONFIG_PPC32
if (vma->vm_file != NULL && vma->anon_vma != NULL && (prot & PROT_EXEC)) {
/*
* We are making executable a file mapping that has
if (rc)
return rc;
}
+#endif
return file_map_prot_check(vma->vm_file, prot, vma->vm_flags&VM_SHARED);
}
nexthdr = ip6->nexthdr;
offset += sizeof(_ipv6h);
- offset = ipv6_skip_exthdr(skb, offset, &nexthdr,
- skb->tail - skb->head - offset);
+ offset = ipv6_skip_exthdr(skb, offset, &nexthdr);
if (offset < 0)
goto out;
static void selinux_socket_post_create(struct socket *sock, int family,
int type, int protocol, int kern)
{
- int err;
struct inode_security_struct *isec;
struct task_security_struct *tsec;
- err = inode_doinit(SOCK_INODE(sock));
- if (err < 0)
- return;
isec = SOCK_INODE(sock)->i_security;
tsec = current->security;
isec->sclass = socket_type_to_security_class(family, type, protocol);
isec->sid = kern ? SECINITSID_KERNEL : tsec->sid;
+ isec->initialized = 1;
return;
}
static int selinux_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
{
- return socket_has_perm(current, sock, SOCKET__CONNECT);
+ struct inode_security_struct *isec;
+ int err;
+
+ err = socket_has_perm(current, sock, SOCKET__CONNECT);
+ if (err)
+ return err;
+
+ /*
+ * If a TCP socket, check name_connect permission for the port.
+ */
+ isec = SOCK_INODE(sock)->i_security;
+ if (isec->sclass == SECCLASS_TCP_SOCKET) {
+ struct sock *sk = sock->sk;
+ struct avc_audit_data ad;
+ struct sockaddr_in *addr4 = NULL;
+ struct sockaddr_in6 *addr6 = NULL;
+ unsigned short snum;
+ u32 sid;
+
+ if (sk->sk_family == PF_INET) {
+ addr4 = (struct sockaddr_in *)address;
+ if (addrlen != sizeof(struct sockaddr_in))
+ return -EINVAL;
+ snum = ntohs(addr4->sin_port);
+ } else {
+ addr6 = (struct sockaddr_in6 *)address;
+ if (addrlen != sizeof(struct sockaddr_in6))
+ return -EINVAL;
+ snum = ntohs(addr6->sin6_port);
+ }
+
+ err = security_port_sid(sk->sk_family, sk->sk_type,
+ sk->sk_protocol, snum, &sid);
+ if (err)
+ goto out;
+
+ AVC_AUDIT_DATA_INIT(&ad,NET);
+ ad.u.net.dport = htons(snum);
+ ad.u.net.family = sk->sk_family;
+ err = avc_has_perm(isec->sid, sid, isec->sclass,
+ TCP_SOCKET__NAME_CONNECT, &ad);
+ if (err)
+ goto out;
+ }
+
+out:
+ return err;
}
static int selinux_socket_listen(struct socket *sock, int backlog)
if (err)
return err;
- err = inode_doinit(SOCK_INODE(newsock));
- if (err < 0)
- return err;
newisec = SOCK_INODE(newsock)->i_security;
isec = SOCK_INODE(sock)->i_security;
newisec->sclass = isec->sclass;
newisec->sid = isec->sid;
+ newisec->initialized = 1;
return 0;
}
err = selinux_nlmsg_lookup(isec->sclass, nlh->nlmsg_type, &perm);
if (err) {
+ if (err == -EINVAL) {
+ audit_log(current->audit_context,
+ "SELinux: unrecognized netlink message"
+ " type=%hu for sclass=%hu\n",
+ nlh->nlmsg_type, isec->sclass);
+ if (!selinux_enforcing)
+ err = 0;
+ }
+
/* Ignore */
if (err == -ENOENT)
err = 0;
}
static int ipc_has_perm(struct kern_ipc_perm *ipc_perms,
- u16 sclass, u32 perms)
+ u32 perms)
{
struct task_security_struct *tsec;
struct ipc_security_struct *isec;
AVC_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = ipc_perms->key;
- return avc_has_perm(tsec->sid, isec->sid, sclass, perms, &ad);
+ return avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
}
static int selinux_msg_msg_alloc_security(struct msg_msg *msg)
return 0;
}
- err = ipc_has_perm(&msq->q_perm, SECCLASS_MSGQ, perms);
+ err = ipc_has_perm(&msq->q_perm, perms);
return err;
}
return 0;
}
- err = ipc_has_perm(&shp->shm_perm, SECCLASS_SHM, perms);
+ err = ipc_has_perm(&shp->shm_perm, perms);
return err;
}
else
perms = SHM__READ | SHM__WRITE;
- return ipc_has_perm(&shp->shm_perm, SECCLASS_SHM, perms);
+ return ipc_has_perm(&shp->shm_perm, perms);
}
/* Semaphore security operations */
return 0;
}
- err = ipc_has_perm(&sma->sem_perm, SECCLASS_SEM, perms);
+ err = ipc_has_perm(&sma->sem_perm, perms);
return err;
}
else
perms = SEM__READ;
- return ipc_has_perm(&sma->sem_perm, SECCLASS_SEM, perms);
+ return ipc_has_perm(&sma->sem_perm, perms);
}
static int selinux_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
{
- struct ipc_security_struct *isec = ipcp->security;
- u16 sclass = SECCLASS_IPC;
u32 av = 0;
- if (isec && isec->magic == SELINUX_MAGIC)
- sclass = isec->sclass;
-
av = 0;
if (flag & S_IRUGO)
av |= IPC__UNIX_READ;
if (av == 0)
return 0;
- return ipc_has_perm(ipcp, sclass, av);
+ return ipc_has_perm(ipcp, av);
}
/* module stacking operations */
-int selinux_register_security (const char *name, struct security_operations *ops)
+static int selinux_register_security (const char *name, struct security_operations *ops)
{
if (secondary_ops != original_ops) {
printk(KERN_INFO "%s: There is already a secondary security "
return 0;
}
-int selinux_unregister_security (const char *name, struct security_operations *ops)
+static int selinux_unregister_security (const char *name, struct security_operations *ops)
{
if (ops != secondary_ops) {
printk (KERN_INFO "%s: trying to unregister a security module "
struct task_security_struct *tsec;
u32 sid = 0;
int error;
+ char *str = value;
if (current != p) {
/* SELinux only allows a process to change its own
return error;
/* Obtain a SID for the context, if one was specified. */
- if (size) {
- int error;
+ if (size && str[1] && str[1] != '\n') {
+ if (str[size-1] == '\n') {
+ str[size-1] = 0;
+ size--;
+ }
error = security_context_to_sid(value, size, &sid);
if (error)
return error;
return size;
}
-struct security_operations selinux_ops = {
+static struct security_operations selinux_ops = {
.ptrace = selinux_ptrace,
.capget = selinux_capget,
.capset_check = selinux_capset_check,
#endif
};
-__init int selinux_init(void)
+static __init int selinux_init(void)
{
struct task_security_struct *tsec;
git://git.onelab.eu / linux-2.6.git / blobdiff