/* Updated: Karl MacMillan <kmacmillan@tresys.com>
*
- * Added conditional policy language extensions
+ * Added conditional policy language extensions
*
+ * Updated: Hewlett-Packard <paul.moore@hp.com>
+ *
+ * Added support for the policy capability bitmap
+ *
+ * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2003 - 2004 Tresys Technology, LLC
* Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
+ * it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2.
*/
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/audit.h>
-#include <asm/uaccess.h>
-#include <asm/semaphore.h>
+#include <linux/uaccess.h>
+#include <linux/kobject.h>
+#include <linux/ctype.h>
/* selinuxfs pseudo filesystem for exporting the security policy API.
Based on the proc code and the fs/nfsd/nfsctl.c code. */
#include "objsec.h"
#include "conditional.h"
-unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
-
-#ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
-#define SELINUX_COMPAT_NET_VALUE 0
-#else
-#define SELINUX_COMPAT_NET_VALUE 1
-#endif
+/* Policy capability filenames */
+static char *policycap_names[] = {
+ "network_peer_controls",
+ "open_perms"
+};
-int selinux_compat_net = SELINUX_COMPAT_NET_VALUE;
+unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
static int __init checkreqprot_setup(char *str)
{
- selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0;
+ unsigned long checkreqprot;
+ if (!strict_strtoul(str, 0, &checkreqprot))
+ selinux_checkreqprot = checkreqprot ? 1 : 0;
return 1;
}
__setup("checkreqprot=", checkreqprot_setup);
-static int __init selinux_compat_net_setup(char *str)
-{
- selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0;
- return 1;
-}
-__setup("selinux_compat_net=", selinux_compat_net_setup);
-
-
static DEFINE_MUTEX(sel_mutex);
/* global data for booleans */
-static struct dentry *bool_dir = NULL;
-static int bool_num = 0;
-static int *bool_pending_values = NULL;
+static struct dentry *bool_dir;
+static int bool_num;
+static char **bool_pending_names;
+static int *bool_pending_values;
+
+/* global data for classes */
+static struct dentry *class_dir;
+static unsigned long last_class_ino;
+
+static char policy_opened;
+
+/* global data for policy capabilities */
+static struct dentry *policycap_dir;
extern void selnl_notify_setenforce(int val);
static int task_has_security(struct task_struct *tsk,
u32 perms)
{
- struct task_security_struct *tsec;
-
- tsec = tsk->security;
+ const struct task_security_struct *tsec;
+ u32 sid = 0;
+
+ rcu_read_lock();
+ tsec = __task_cred(tsk)->security;
+ if (tsec)
+ sid = tsec->sid;
+ rcu_read_unlock();
if (!tsec)
return -EACCES;
- return avc_has_perm(tsec->sid, SECINITSID_SECURITY,
+ return avc_has_perm(sid, SECINITSID_SECURITY,
SECCLASS_SECURITY, perms, NULL);
}
SEL_MEMBER, /* compute polyinstantiation membership decision */
SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
SEL_COMPAT_NET, /* whether to use old compat network packet controls */
+ SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */
+ SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */
+ SEL_STATUS, /* export current status using mmap() */
+ SEL_POLICY, /* allow userspace to read the in kernel policy */
SEL_INO_NEXT, /* The next inode number to use */
};
static unsigned long sel_last_ino = SEL_INO_NEXT - 1;
-#define SEL_INITCON_INO_OFFSET 0x01000000
-#define SEL_BOOL_INO_OFFSET 0x02000000
-#define SEL_INO_MASK 0x00ffffff
+#define SEL_INITCON_INO_OFFSET 0x01000000
+#define SEL_BOOL_INO_OFFSET 0x02000000
+#define SEL_CLASS_INO_OFFSET 0x04000000
+#define SEL_POLICYCAP_INO_OFFSET 0x08000000
+#define SEL_INO_MASK 0x00ffffff
#define TMPBUFLEN 12
static ssize_t sel_read_enforce(struct file *filp, char __user *buf,
}
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
-static ssize_t sel_write_enforce(struct file * file, const char __user * buf,
+static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char *page = NULL;
ssize_t length;
int new_value;
+ length = -ENOMEM;
if (count >= PAGE_SIZE)
- return -ENOMEM;
- if (*ppos != 0) {
- /* No partial writes. */
- return -EINVAL;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ goto out;
+
+ /* No partial writes. */
+ length = EINVAL;
+ if (*ppos != 0)
+ goto out;
+
+ length = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
- return -ENOMEM;
+ goto out;
+
length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
if (length)
goto out;
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
- "enforcing=%d old_enforcing=%d auid=%u", new_value,
- selinux_enforcing,
- audit_get_loginuid(current->audit_context));
+ "enforcing=%d old_enforcing=%d auid=%u ses=%u",
+ new_value, selinux_enforcing,
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
selinux_enforcing = new_value;
if (selinux_enforcing)
avc_ss_reset(0);
selnl_notify_setenforce(selinux_enforcing);
+ selinux_status_update_setenforce(selinux_enforcing);
}
length = count;
out:
static const struct file_operations sel_enforce_ops = {
.read = sel_read_enforce,
.write = sel_write_enforce,
+ .llseek = generic_file_llseek,
+};
+
+static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char tmpbuf[TMPBUFLEN];
+ ssize_t length;
+ ino_t ino = filp->f_path.dentry->d_inode->i_ino;
+ int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ?
+ security_get_reject_unknown() : !security_get_allow_unknown();
+
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown);
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations sel_handle_unknown_ops = {
+ .read = sel_read_handle_unknown,
+ .llseek = generic_file_llseek,
+};
+
+static int sel_open_handle_status(struct inode *inode, struct file *filp)
+{
+ struct page *status = selinux_kernel_status_page();
+
+ if (!status)
+ return -ENOMEM;
+
+ filp->private_data = status;
+
+ return 0;
+}
+
+static ssize_t sel_read_handle_status(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct page *status = filp->private_data;
+
+ BUG_ON(!status);
+
+ return simple_read_from_buffer(buf, count, ppos,
+ page_address(status),
+ sizeof(struct selinux_kernel_status));
+}
+
+static int sel_mmap_handle_status(struct file *filp,
+ struct vm_area_struct *vma)
+{
+ struct page *status = filp->private_data;
+ unsigned long size = vma->vm_end - vma->vm_start;
+
+ BUG_ON(!status);
+
+ /* only allows one page from the head */
+ if (vma->vm_pgoff > 0 || size != PAGE_SIZE)
+ return -EIO;
+ /* disallow writable mapping */
+ if (vma->vm_flags & VM_WRITE)
+ return -EPERM;
+ /* disallow mprotect() turns it into writable */
+ vma->vm_flags &= ~VM_MAYWRITE;
+
+ return remap_pfn_range(vma, vma->vm_start,
+ page_to_pfn(status),
+ size, vma->vm_page_prot);
+}
+
+static const struct file_operations sel_handle_status_ops = {
+ .open = sel_open_handle_status,
+ .read = sel_read_handle_status,
+ .mmap = sel_mmap_handle_status,
+ .llseek = generic_file_llseek,
};
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
-static ssize_t sel_write_disable(struct file * file, const char __user * buf,
+static ssize_t sel_write_disable(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char *page = NULL;
ssize_t length;
int new_value;
extern int selinux_disable(void);
+ length = -ENOMEM;
if (count >= PAGE_SIZE)
- return -ENOMEM;
- if (*ppos != 0) {
- /* No partial writes. */
- return -EINVAL;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ goto out;
+
+ /* No partial writes. */
+ length = -EINVAL;
+ if (*ppos != 0)
+ goto out;
+
+ length = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
- return -ENOMEM;
+ goto out;
+
length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
if (new_value) {
length = selinux_disable();
- if (length < 0)
+ if (length)
goto out;
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
- "selinux=0 auid=%u",
- audit_get_loginuid(current->audit_context));
+ "selinux=0 auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
}
length = count;
static const struct file_operations sel_disable_ops = {
.write = sel_write_disable,
+ .llseek = generic_file_llseek,
};
static ssize_t sel_read_policyvers(struct file *filp, char __user *buf,
- size_t count, loff_t *ppos)
+ size_t count, loff_t *ppos)
{
char tmpbuf[TMPBUFLEN];
ssize_t length;
static const struct file_operations sel_policyvers_ops = {
.read = sel_read_policyvers,
+ .llseek = generic_file_llseek,
};
/* declaration for sel_write_load */
static int sel_make_bools(void);
+static int sel_make_classes(void);
+static int sel_make_policycap(void);
+
+/* declaration for sel_make_class_dirs */
+static int sel_make_dir(struct inode *dir, struct dentry *dentry,
+ unsigned long *ino);
static ssize_t sel_read_mls(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
char tmpbuf[TMPBUFLEN];
ssize_t length;
- length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled);
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%d",
+ security_mls_enabled());
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
static const struct file_operations sel_mls_ops = {
.read = sel_read_mls,
+ .llseek = generic_file_llseek,
};
-static ssize_t sel_write_load(struct file * file, const char __user * buf,
- size_t count, loff_t *ppos)
+struct policy_load_memory {
+ size_t len;
+ void *data;
+};
+
+static int sel_open_policy(struct inode *inode, struct file *filp)
+{
+ struct policy_load_memory *plm = NULL;
+ int rc;
+
+ BUG_ON(filp->private_data);
+
+ mutex_lock(&sel_mutex);
+
+ rc = task_has_security(current, SECURITY__READ_POLICY);
+ if (rc)
+ goto err;
+
+ rc = -EBUSY;
+ if (policy_opened)
+ goto err;
+
+ rc = -ENOMEM;
+ plm = kzalloc(sizeof(*plm), GFP_KERNEL);
+ if (!plm)
+ goto err;
+
+ if (i_size_read(inode) != security_policydb_len()) {
+ mutex_lock(&inode->i_mutex);
+ i_size_write(inode, security_policydb_len());
+ mutex_unlock(&inode->i_mutex);
+ }
+
+ rc = security_read_policy(&plm->data, &plm->len);
+ if (rc)
+ goto err;
+
+ policy_opened = 1;
+ filp->private_data = plm;
+
+ mutex_unlock(&sel_mutex);
+
+ return 0;
+err:
+ mutex_unlock(&sel_mutex);
+
+ if (plm)
+ vfree(plm->data);
+ kfree(plm);
+ return rc;
+}
+
+static int sel_release_policy(struct inode *inode, struct file *filp)
+{
+ struct policy_load_memory *plm = filp->private_data;
+
+ BUG_ON(!plm);
+
+ policy_opened = 0;
+
+ vfree(plm->data);
+ kfree(plm);
+
+ return 0;
+}
+
+static ssize_t sel_read_policy(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
{
+ struct policy_load_memory *plm = filp->private_data;
int ret;
+
+ mutex_lock(&sel_mutex);
+
+ ret = task_has_security(current, SECURITY__READ_POLICY);
+ if (ret)
+ goto out;
+
+ ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len);
+out:
+ mutex_unlock(&sel_mutex);
+ return ret;
+}
+
+static int sel_mmap_policy_fault(struct vm_area_struct *vma,
+ struct vm_fault *vmf)
+{
+ struct policy_load_memory *plm = vma->vm_file->private_data;
+ unsigned long offset;
+ struct page *page;
+
+ if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE))
+ return VM_FAULT_SIGBUS;
+
+ offset = vmf->pgoff << PAGE_SHIFT;
+ if (offset >= roundup(plm->len, PAGE_SIZE))
+ return VM_FAULT_SIGBUS;
+
+ page = vmalloc_to_page(plm->data + offset);
+ get_page(page);
+
+ vmf->page = page;
+
+ return 0;
+}
+
+static struct vm_operations_struct sel_mmap_policy_ops = {
+ .fault = sel_mmap_policy_fault,
+ .page_mkwrite = sel_mmap_policy_fault,
+};
+
+int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma)
+{
+ if (vma->vm_flags & VM_SHARED) {
+ /* do not allow mprotect to make mapping writable */
+ vma->vm_flags &= ~VM_MAYWRITE;
+
+ if (vma->vm_flags & VM_WRITE)
+ return -EACCES;
+ }
+
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_ops = &sel_mmap_policy_ops;
+
+ return 0;
+}
+
+static const struct file_operations sel_policy_ops = {
+ .open = sel_open_policy,
+ .read = sel_read_policy,
+ .mmap = sel_mmap_policy,
+ .release = sel_release_policy,
+};
+
+static ssize_t sel_write_load(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+
+{
ssize_t length;
void *data = NULL;
if (length)
goto out;
- if (*ppos != 0) {
- /* No partial writes. */
- length = -EINVAL;
+ /* No partial writes. */
+ length = -EINVAL;
+ if (*ppos != 0)
goto out;
- }
- if ((count > 64 * 1024 * 1024)
- || (data = vmalloc(count)) == NULL) {
- length = -ENOMEM;
+ length = -EFBIG;
+ if (count > 64 * 1024 * 1024)
+ goto out;
+
+ length = -ENOMEM;
+ data = vmalloc(count);
+ if (!data)
goto out;
- }
length = -EFAULT;
if (copy_from_user(data, buf, count) != 0)
if (length)
goto out;
- ret = sel_make_bools();
- if (ret)
- length = ret;
- else
- length = count;
+ length = sel_make_bools();
+ if (length)
+ goto out1;
+
+ length = sel_make_classes();
+ if (length)
+ goto out1;
+
+ length = sel_make_policycap();
+ if (length)
+ goto out1;
+
+ length = count;
+
+out1:
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
- "policy loaded auid=%u",
- audit_get_loginuid(current->audit_context));
+ "policy loaded auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
out:
mutex_unlock(&sel_mutex);
vfree(data);
static const struct file_operations sel_load_ops = {
.write = sel_write_load,
+ .llseek = generic_file_llseek,
};
-static ssize_t sel_write_context(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_context(struct file *file, char *buf, size_t size)
{
- char *canon;
+ char *canon = NULL;
u32 sid, len;
ssize_t length;
length = task_has_security(current, SECURITY__CHECK_CONTEXT);
if (length)
- return length;
+ goto out;
length = security_context_to_sid(buf, size, &sid);
- if (length < 0)
- return length;
+ if (length)
+ goto out;
length = security_sid_to_context(sid, &canon, &len);
- if (length < 0)
- return length;
+ if (length)
+ goto out;
+ length = -ERANGE;
if (len > SIMPLE_TRANSACTION_LIMIT) {
- printk(KERN_ERR "%s: context size (%u) exceeds payload "
- "max\n", __FUNCTION__, len);
- length = -ERANGE;
+ printk(KERN_ERR "SELinux: %s: context size (%u) exceeds "
+ "payload max\n", __func__, len);
goto out;
}
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
-static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf,
+static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char *page = NULL;
ssize_t length;
unsigned int new_value;
length = task_has_security(current, SECURITY__SETCHECKREQPROT);
if (length)
- return length;
+ goto out;
+ length = -ENOMEM;
if (count >= PAGE_SIZE)
- return -ENOMEM;
- if (*ppos != 0) {
- /* No partial writes. */
- return -EINVAL;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- length = -EFAULT;
- if (copy_from_user(page, buf, count))
goto out;
+ /* No partial writes. */
length = -EINVAL;
- if (sscanf(page, "%u", &new_value) != 1)
+ if (*ppos != 0)
goto out;
- selinux_checkreqprot = new_value ? 1 : 0;
- length = count;
-out:
- free_page((unsigned long) page);
- return length;
-}
-static const struct file_operations sel_checkreqprot_ops = {
- .read = sel_read_checkreqprot,
- .write = sel_write_checkreqprot,
-};
-
-static ssize_t sel_read_compat_net(struct file *filp, char __user *buf,
- size_t count, loff_t *ppos)
-{
- char tmpbuf[TMPBUFLEN];
- ssize_t length;
-
- length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net);
- return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
-}
-
-static ssize_t sel_write_compat_net(struct file * file, const char __user * buf,
- size_t count, loff_t *ppos)
-{
- char *page;
- ssize_t length;
- int new_value;
-
- length = task_has_security(current, SECURITY__LOAD_POLICY);
- if (length)
- return length;
-
- if (count >= PAGE_SIZE)
- return -ENOMEM;
- if (*ppos != 0) {
- /* No partial writes. */
- return -EINVAL;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ length = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
- return -ENOMEM;
+ goto out;
+
length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
length = -EINVAL;
- if (sscanf(page, "%d", &new_value) != 1)
+ if (sscanf(page, "%u", &new_value) != 1)
goto out;
- selinux_compat_net = new_value ? 1 : 0;
+ selinux_checkreqprot = new_value ? 1 : 0;
length = count;
out:
free_page((unsigned long) page);
return length;
}
-static const struct file_operations sel_compat_net_ops = {
- .read = sel_read_compat_net,
- .write = sel_write_compat_net,
+static const struct file_operations sel_checkreqprot_ops = {
+ .read = sel_read_checkreqprot,
+ .write = sel_write_checkreqprot,
+ .llseek = generic_file_llseek,
};
/*
* Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
*/
-static ssize_t sel_write_access(struct file * file, char *buf, size_t size);
-static ssize_t sel_write_create(struct file * file, char *buf, size_t size);
-static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size);
-static ssize_t sel_write_user(struct file * file, char *buf, size_t size);
-static ssize_t sel_write_member(struct file * file, char *buf, size_t size);
+static ssize_t sel_write_access(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_create(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_user(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_member(struct file *file, char *buf, size_t size);
static ssize_t (*write_op[])(struct file *, char *, size_t) = {
[SEL_ACCESS] = sel_write_access,
static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
{
- ino_t ino = file->f_path.dentry->d_inode->i_ino;
+ ino_t ino = file->f_path.dentry->d_inode->i_ino;
char *data;
ssize_t rv;
if (IS_ERR(data))
return PTR_ERR(data);
- rv = write_op[ino](file, data, size);
- if (rv>0) {
+ rv = write_op[ino](file, data, size);
+ if (rv > 0) {
simple_transaction_set(file, rv);
rv = size;
}
.write = selinux_transaction_write,
.read = simple_transaction_read,
.release = simple_transaction_release,
+ .llseek = generic_file_llseek,
};
/*
* and the length returned. Otherwise return 0 or and -error.
*/
-static ssize_t sel_write_access(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
{
- char *scon, *tcon;
+ char *scon = NULL, *tcon = NULL;
u32 ssid, tsid;
u16 tclass;
- u32 req;
struct av_decision avd;
ssize_t length;
length = task_has_security(current, SECURITY__COMPUTE_AV);
if (length)
- return length;
+ goto out;
length = -ENOMEM;
- scon = kzalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size + 1, GFP_KERNEL);
if (!scon)
- return length;
+ goto out;
- tcon = kzalloc(size+1, GFP_KERNEL);
+ length = -ENOMEM;
+ tcon = kzalloc(size + 1, GFP_KERNEL);
if (!tcon)
goto out;
length = -EINVAL;
- if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4)
- goto out2;
+ if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+ goto out;
+
+ length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
+ if (length)
+ goto out;
- length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
- if (length < 0)
- goto out2;
- length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
- if (length < 0)
- goto out2;
+ length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
+ if (length)
+ goto out;
- length = security_compute_av(ssid, tsid, tclass, req, &avd);
- if (length < 0)
- goto out2;
+ security_compute_av_user(ssid, tsid, tclass, &avd);
length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT,
- "%x %x %x %x %u",
- avd.allowed, avd.decided,
+ "%x %x %x %x %u %x",
+ avd.allowed, 0xffffffff,
avd.auditallow, avd.auditdeny,
- avd.seqno);
-out2:
- kfree(tcon);
+ avd.seqno, avd.flags);
out:
+ kfree(tcon);
kfree(scon);
return length;
}
-static ssize_t sel_write_create(struct file * file, char *buf, size_t size)
+static inline int hexcode_to_int(int code) {
+ if (code == '\0' || !isxdigit(code))
+ return -1;
+ if (isdigit(code))
+ return code - '0';
+ return tolower(code) - 'a' + 10;
+}
+
+static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
{
- char *scon, *tcon;
+ char *scon = NULL, *tcon = NULL;
+ char *namebuf = NULL, *objname = NULL;
u32 ssid, tsid, newsid;
u16 tclass;
ssize_t length;
- char *newcon;
+ char *newcon = NULL;
u32 len;
+ int nargs;
length = task_has_security(current, SECURITY__COMPUTE_CREATE);
if (length)
- return length;
+ goto out;
length = -ENOMEM;
- scon = kzalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size + 1, GFP_KERNEL);
if (!scon)
- return length;
+ goto out;
- tcon = kzalloc(size+1, GFP_KERNEL);
+ length = -ENOMEM;
+ tcon = kzalloc(size + 1, GFP_KERNEL);
if (!tcon)
goto out;
+ length = -ENOMEM;
+ namebuf = kzalloc(size + 1, GFP_KERNEL);
+ if (!namebuf)
+ goto out;
+
length = -EINVAL;
- if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
- goto out2;
+ nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf);
+ if (nargs < 3 || nargs > 4)
+ goto out;
+ if (nargs == 4) {
+ /*
+ * If and when the name of new object to be queried contains
+ * either whitespace or multibyte characters, they shall be
+ * encoded based on the percentage-encoding rule.
+ * If not encoded, the sscanf logic picks up only left-half
+ * of the supplied name; splitted by a whitespace unexpectedly.
+ */
+ char *r, *w;
+ int c1, c2;
+
+ r = w = namebuf;
+ do {
+ c1 = *r++;
+ if (c1 == '+')
+ c1 = ' ';
+ else if (c1 == '%') {
+ if ((c1 = hexcode_to_int(*r++)) < 0)
+ goto out;
+ if ((c2 = hexcode_to_int(*r++)) < 0)
+ goto out;
+ c1 = (c1 << 4) | c2;
+ }
+ *w++ = c1;
+ } while (c1 != '\0');
+
+ objname = namebuf;
+ }
+
+ length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
+ if (length)
+ goto out;
- length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
- if (length < 0)
- goto out2;
- length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
- if (length < 0)
- goto out2;
+ length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
+ if (length)
+ goto out;
- length = security_transition_sid(ssid, tsid, tclass, &newsid);
- if (length < 0)
- goto out2;
+ length = security_transition_sid_user(ssid, tsid, tclass,
+ objname, &newsid);
+ if (length)
+ goto out;
length = security_sid_to_context(newsid, &newcon, &len);
- if (length < 0)
- goto out2;
+ if (length)
+ goto out;
+ length = -ERANGE;
if (len > SIMPLE_TRANSACTION_LIMIT) {
- printk(KERN_ERR "%s: context size (%u) exceeds payload "
- "max\n", __FUNCTION__, len);
- length = -ERANGE;
- goto out3;
+ printk(KERN_ERR "SELinux: %s: context size (%u) exceeds "
+ "payload max\n", __func__, len);
+ goto out;
}
memcpy(buf, newcon, len);
length = len;
-out3:
+out:
kfree(newcon);
-out2:
+ kfree(namebuf);
kfree(tcon);
-out:
kfree(scon);
return length;
}
-static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size)
{
- char *scon, *tcon;
+ char *scon = NULL, *tcon = NULL;
u32 ssid, tsid, newsid;
u16 tclass;
ssize_t length;
- char *newcon;
+ char *newcon = NULL;
u32 len;
length = task_has_security(current, SECURITY__COMPUTE_RELABEL);
if (length)
- return length;
+ goto out;
length = -ENOMEM;
- scon = kzalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size + 1, GFP_KERNEL);
if (!scon)
- return length;
+ goto out;
- tcon = kzalloc(size+1, GFP_KERNEL);
+ length = -ENOMEM;
+ tcon = kzalloc(size + 1, GFP_KERNEL);
if (!tcon)
goto out;
length = -EINVAL;
if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
- goto out2;
+ goto out;
+
+ length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
+ if (length)
+ goto out;
- length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
- if (length < 0)
- goto out2;
- length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
- if (length < 0)
- goto out2;
+ length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
+ if (length)
+ goto out;
length = security_change_sid(ssid, tsid, tclass, &newsid);
- if (length < 0)
- goto out2;
+ if (length)
+ goto out;
length = security_sid_to_context(newsid, &newcon, &len);
- if (length < 0)
- goto out2;
+ if (length)
+ goto out;
- if (len > SIMPLE_TRANSACTION_LIMIT) {
- length = -ERANGE;
- goto out3;
- }
+ length = -ERANGE;
+ if (len > SIMPLE_TRANSACTION_LIMIT)
+ goto out;
memcpy(buf, newcon, len);
length = len;
-out3:
+out:
kfree(newcon);
-out2:
kfree(tcon);
-out:
kfree(scon);
return length;
}
-static ssize_t sel_write_user(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
{
- char *con, *user, *ptr;
- u32 sid, *sids;
+ char *con = NULL, *user = NULL, *ptr;
+ u32 sid, *sids = NULL;
ssize_t length;
char *newcon;
int i, rc;
length = task_has_security(current, SECURITY__COMPUTE_USER);
if (length)
- return length;
+ goto out;
length = -ENOMEM;
- con = kzalloc(size+1, GFP_KERNEL);
+ con = kzalloc(size + 1, GFP_KERNEL);
if (!con)
- return length;
+ goto out;
- user = kzalloc(size+1, GFP_KERNEL);
+ length = -ENOMEM;
+ user = kzalloc(size + 1, GFP_KERNEL);
if (!user)
goto out;
length = -EINVAL;
if (sscanf(buf, "%s %s", con, user) != 2)
- goto out2;
+ goto out;
- length = security_context_to_sid(con, strlen(con)+1, &sid);
- if (length < 0)
- goto out2;
+ length = security_context_to_sid(con, strlen(con) + 1, &sid);
+ if (length)
+ goto out;
length = security_get_user_sids(sid, user, &sids, &nsids);
- if (length < 0)
- goto out2;
+ if (length)
+ goto out;
length = sprintf(buf, "%u", nsids) + 1;
ptr = buf + length;
rc = security_sid_to_context(sids[i], &newcon, &len);
if (rc) {
length = rc;
- goto out3;
+ goto out;
}
if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) {
kfree(newcon);
length = -ERANGE;
- goto out3;
+ goto out;
}
memcpy(ptr, newcon, len);
kfree(newcon);
ptr += len;
length += len;
}
-out3:
+out:
kfree(sids);
-out2:
kfree(user);
-out:
kfree(con);
return length;
}
-static ssize_t sel_write_member(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
{
- char *scon, *tcon;
+ char *scon = NULL, *tcon = NULL;
u32 ssid, tsid, newsid;
u16 tclass;
ssize_t length;
- char *newcon;
+ char *newcon = NULL;
u32 len;
length = task_has_security(current, SECURITY__COMPUTE_MEMBER);
if (length)
- return length;
+ goto out;
length = -ENOMEM;
- scon = kzalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size + 1, GFP_KERNEL);
if (!scon)
- return length;
+ goto out;
- tcon = kzalloc(size+1, GFP_KERNEL);
+ length = -ENOMEM;
+ tcon = kzalloc(size + 1, GFP_KERNEL);
if (!tcon)
goto out;
length = -EINVAL;
if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
- goto out2;
+ goto out;
- length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
- if (length < 0)
- goto out2;
- length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
- if (length < 0)
- goto out2;
+ length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
+ if (length)
+ goto out;
+
+ length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
+ if (length)
+ goto out;
length = security_member_sid(ssid, tsid, tclass, &newsid);
- if (length < 0)
- goto out2;
+ if (length)
+ goto out;
length = security_sid_to_context(newsid, &newcon, &len);
- if (length < 0)
- goto out2;
+ if (length)
+ goto out;
+ length = -ERANGE;
if (len > SIMPLE_TRANSACTION_LIMIT) {
- printk(KERN_ERR "%s: context size (%u) exceeds payload "
- "max\n", __FUNCTION__, len);
- length = -ERANGE;
- goto out3;
+ printk(KERN_ERR "SELinux: %s: context size (%u) exceeds "
+ "payload max\n", __func__, len);
+ goto out;
}
memcpy(buf, newcon, len);
length = len;
-out3:
+out:
kfree(newcon);
-out2:
kfree(tcon);
-out:
kfree(scon);
return length;
}
if (ret) {
ret->i_mode = mode;
- ret->i_uid = ret->i_gid = 0;
- ret->i_blocks = 0;
ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
}
return ret;
ssize_t length;
ssize_t ret;
int cur_enforcing;
- struct inode *inode;
+ struct inode *inode = filep->f_path.dentry->d_inode;
+ unsigned index = inode->i_ino & SEL_INO_MASK;
+ const char *name = filep->f_path.dentry->d_name.name;
mutex_lock(&sel_mutex);
- ret = -EFAULT;
-
- /* check to see if this file has been deleted */
- if (!filep->f_op)
+ ret = -EINVAL;
+ if (index >= bool_num || strcmp(name, bool_pending_names[index]))
goto out;
- if (count > PAGE_SIZE) {
- ret = -EINVAL;
- goto out;
- }
- if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) {
- ret = -ENOMEM;
+ ret = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
goto out;
- }
- inode = filep->f_path.dentry->d_inode;
- cur_enforcing = security_get_bool_value(inode->i_ino&SEL_INO_MASK);
+ cur_enforcing = security_get_bool_value(index);
if (cur_enforcing < 0) {
ret = cur_enforcing;
goto out;
}
-
length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
- bool_pending_values[inode->i_ino&SEL_INO_MASK]);
+ bool_pending_values[index]);
ret = simple_read_from_buffer(buf, count, ppos, page, length);
out:
mutex_unlock(&sel_mutex);
- if (page)
- free_page((unsigned long)page);
+ free_page((unsigned long)page);
return ret;
}
size_t count, loff_t *ppos)
{
char *page = NULL;
- ssize_t length = -EFAULT;
+ ssize_t length;
int new_value;
- struct inode *inode;
+ struct inode *inode = filep->f_path.dentry->d_inode;
+ unsigned index = inode->i_ino & SEL_INO_MASK;
+ const char *name = filep->f_path.dentry->d_name.name;
mutex_lock(&sel_mutex);
if (length)
goto out;
- /* check to see if this file has been deleted */
- if (!filep->f_op)
+ length = -EINVAL;
+ if (index >= bool_num || strcmp(name, bool_pending_names[index]))
goto out;
- if (count >= PAGE_SIZE) {
- length = -ENOMEM;
+ length = -ENOMEM;
+ if (count >= PAGE_SIZE)
goto out;
- }
- if (*ppos != 0) {
- /* No partial writes. */
+
+ /* No partial writes. */
+ length = -EINVAL;
+ if (*ppos != 0)
goto out;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
- if (!page) {
- length = -ENOMEM;
+
+ length = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
goto out;
- }
+ length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
if (new_value)
new_value = 1;
- inode = filep->f_path.dentry->d_inode;
- bool_pending_values[inode->i_ino&SEL_INO_MASK] = new_value;
+ bool_pending_values[index] = new_value;
length = count;
out:
mutex_unlock(&sel_mutex);
- if (page)
- free_page((unsigned long) page);
+ free_page((unsigned long) page);
return length;
}
static const struct file_operations sel_bool_ops = {
- .read = sel_read_bool,
- .write = sel_write_bool,
+ .read = sel_read_bool,
+ .write = sel_write_bool,
+ .llseek = generic_file_llseek,
};
static ssize_t sel_commit_bools_write(struct file *filep,
size_t count, loff_t *ppos)
{
char *page = NULL;
- ssize_t length = -EFAULT;
+ ssize_t length;
int new_value;
mutex_lock(&sel_mutex);
if (length)
goto out;
- /* check to see if this file has been deleted */
- if (!filep->f_op)
+ length = -ENOMEM;
+ if (count >= PAGE_SIZE)
goto out;
- if (count >= PAGE_SIZE) {
- length = -ENOMEM;
- goto out;
- }
- if (*ppos != 0) {
- /* No partial writes. */
+ /* No partial writes. */
+ length = -EINVAL;
+ if (*ppos != 0)
goto out;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
- if (!page) {
- length = -ENOMEM;
+
+ length = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
goto out;
- }
+ length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
if (sscanf(page, "%d", &new_value) != 1)
goto out;
- if (new_value && bool_pending_values) {
- security_set_bools(bool_num, bool_pending_values);
- }
+ length = 0;
+ if (new_value && bool_pending_values)
+ length = security_set_bools(bool_num, bool_pending_values);
- length = count;
+ if (!length)
+ length = count;
out:
mutex_unlock(&sel_mutex);
- if (page)
- free_page((unsigned long) page);
+ free_page((unsigned long) page);
return length;
}
static const struct file_operations sel_commit_bools_ops = {
- .write = sel_commit_bools_write,
+ .write = sel_commit_bools_write,
+ .llseek = generic_file_llseek,
};
-/* partial revoke() from fs/proc/generic.c proc_kill_inodes */
static void sel_remove_entries(struct dentry *de)
{
- struct list_head *p, *node;
- struct super_block *sb = de->d_sb;
+ struct list_head *node;
- spin_lock(&dcache_lock);
+ spin_lock(&de->d_lock);
node = de->d_subdirs.next;
while (node != &de->d_subdirs) {
struct dentry *d = list_entry(node, struct dentry, d_u.d_child);
+
+ spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED);
list_del_init(node);
if (d->d_inode) {
- d = dget_locked(d);
- spin_unlock(&dcache_lock);
+ dget_dlock(d);
+ spin_unlock(&de->d_lock);
+ spin_unlock(&d->d_lock);
d_delete(d);
simple_unlink(de->d_inode, d);
dput(d);
- spin_lock(&dcache_lock);
- }
+ spin_lock(&de->d_lock);
+ } else
+ spin_unlock(&d->d_lock);
node = de->d_subdirs.next;
}
- spin_unlock(&dcache_lock);
-
- file_list_lock();
- list_for_each(p, &sb->s_files) {
- struct file * filp = list_entry(p, struct file, f_u.fu_list);
- struct dentry * dentry = filp->f_path.dentry;
-
- if (dentry->d_parent != de) {
- continue;
- }
- filp->f_op = NULL;
- }
- file_list_unlock();
+ spin_unlock(&de->d_lock);
}
#define BOOL_DIR_NAME "booleans"
static int sel_make_bools(void)
{
- int i, ret = 0;
+ int i, ret;
ssize_t len;
struct dentry *dentry = NULL;
struct dentry *dir = bool_dir;
u32 sid;
/* remove any existing files */
+ for (i = 0; i < bool_num; i++)
+ kfree(bool_pending_names[i]);
+ kfree(bool_pending_names);
kfree(bool_pending_values);
+ bool_pending_names = NULL;
bool_pending_values = NULL;
sel_remove_entries(dir);
- if (!(page = (char*)get_zeroed_page(GFP_KERNEL)))
- return -ENOMEM;
+ ret = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ goto out;
ret = security_get_bools(&num, &names, &values);
- if (ret != 0)
+ if (ret)
goto out;
for (i = 0; i < num; i++) {
+ ret = -ENOMEM;
dentry = d_alloc_name(dir, names[i]);
- if (!dentry) {
- ret = -ENOMEM;
- goto err;
- }
+ if (!dentry)
+ goto out;
+
+ ret = -ENOMEM;
inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
- if (!inode) {
- ret = -ENOMEM;
- goto err;
- }
+ if (!inode)
+ goto out;
+ ret = -EINVAL;
len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
- if (len < 0) {
- ret = -EINVAL;
- goto err;
- } else if (len >= PAGE_SIZE) {
- ret = -ENAMETOOLONG;
- goto err;
- }
- isec = (struct inode_security_struct*)inode->i_security;
- if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid)))
- goto err;
+ if (len < 0)
+ goto out;
+
+ ret = -ENAMETOOLONG;
+ if (len >= PAGE_SIZE)
+ goto out;
+
+ isec = (struct inode_security_struct *)inode->i_security;
+ ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid);
+ if (ret)
+ goto out;
+
isec->sid = sid;
isec->initialized = 1;
inode->i_fop = &sel_bool_ops;
d_add(dentry, inode);
}
bool_num = num;
+ bool_pending_names = names;
bool_pending_values = values;
+
+ free_page((unsigned long)page);
+ return 0;
out:
free_page((unsigned long)page);
+
if (names) {
for (i = 0; i < num; i++)
kfree(names[i]);
kfree(names);
}
- return ret;
-err:
kfree(values);
sel_remove_entries(dir);
- ret = -ENOMEM;
- goto out;
+
+ return ret;
}
#define NULL_FILE_NAME "null"
-struct dentry *selinux_null = NULL;
+struct dentry *selinux_null;
static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
-static ssize_t sel_write_avc_cache_threshold(struct file * file,
- const char __user * buf,
+static ssize_t sel_write_avc_cache_threshold(struct file *file,
+ const char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char *page = NULL;
ssize_t ret;
int new_value;
- if (count >= PAGE_SIZE) {
- ret = -ENOMEM;
+ ret = task_has_security(current, SECURITY__SETSECPARAM);
+ if (ret)
goto out;
- }
- if (*ppos != 0) {
- /* No partial writes. */
- ret = -EINVAL;
+ ret = -ENOMEM;
+ if (count >= PAGE_SIZE)
goto out;
- }
- page = (char*)get_zeroed_page(GFP_KERNEL);
- if (!page) {
- ret = -ENOMEM;
+ /* No partial writes. */
+ ret = -EINVAL;
+ if (*ppos != 0)
goto out;
- }
- if (copy_from_user(page, buf, count)) {
- ret = -EFAULT;
- goto out_free;
- }
+ ret = -ENOMEM;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ goto out;
- if (sscanf(page, "%u", &new_value) != 1) {
- ret = -EINVAL;
+ ret = -EFAULT;
+ if (copy_from_user(page, buf, count))
goto out;
- }
- if (new_value != avc_cache_threshold) {
- ret = task_has_security(current, SECURITY__SETSECPARAM);
- if (ret)
- goto out_free;
- avc_cache_threshold = new_value;
- }
+ ret = -EINVAL;
+ if (sscanf(page, "%u", &new_value) != 1)
+ goto out;
+
+ avc_cache_threshold = new_value;
+
ret = count;
-out_free:
- free_page((unsigned long)page);
out:
+ free_page((unsigned long)page);
return ret;
}
size_t count, loff_t *ppos)
{
char *page;
- ssize_t ret = 0;
+ ssize_t length;
page = (char *)__get_free_page(GFP_KERNEL);
- if (!page) {
- ret = -ENOMEM;
- goto out;
- }
- ret = avc_get_hash_stats(page);
- if (ret >= 0)
- ret = simple_read_from_buffer(buf, count, ppos, page, ret);
+ if (!page)
+ return -ENOMEM;
+
+ length = avc_get_hash_stats(page);
+ if (length >= 0)
+ length = simple_read_from_buffer(buf, count, ppos, page, length);
free_page((unsigned long)page);
-out:
- return ret;
+
+ return length;
}
static const struct file_operations sel_avc_cache_threshold_ops = {
.read = sel_read_avc_cache_threshold,
.write = sel_write_avc_cache_threshold,
+ .llseek = generic_file_llseek,
};
static const struct file_operations sel_avc_hash_stats_ops = {
.read = sel_read_avc_hash_stats,
+ .llseek = generic_file_llseek,
};
#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
{
int cpu;
- for (cpu = *idx; cpu < NR_CPUS; ++cpu) {
+ for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) {
if (!cpu_possible(cpu))
continue;
*idx = cpu + 1;
if (v == SEQ_START_TOKEN)
seq_printf(seq, "lookups hits misses allocations reclaims "
"frees\n");
- else
- seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups,
- st->hits, st->misses, st->allocations,
+ else {
+ unsigned int lookups = st->lookups;
+ unsigned int misses = st->misses;
+ unsigned int hits = lookups - misses;
+ seq_printf(seq, "%u %u %u %u %u %u\n", lookups,
+ hits, misses, st->allocations,
st->reclaims, st->frees);
+ }
return 0;
}
static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v)
{ }
-static struct seq_operations sel_avc_cache_stats_seq_ops = {
+static const struct seq_operations sel_avc_cache_stats_seq_ops = {
.start = sel_avc_stats_seq_start,
.next = sel_avc_stats_seq_next,
.show = sel_avc_stats_seq_show,
static int sel_make_avc_files(struct dentry *dir)
{
- int i, ret = 0;
+ int i;
static struct tree_descr files[] = {
{ "cache_threshold",
&sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
struct dentry *dentry;
dentry = d_alloc_name(dir, files[i].name);
- if (!dentry) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!dentry)
+ return -ENOMEM;
inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode);
- if (!inode) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!inode)
+ return -ENOMEM;
+
inode->i_fop = files[i].ops;
inode->i_ino = ++sel_last_ino;
d_add(dentry, inode);
}
-out:
- return ret;
+
+ return 0;
}
-static ssize_t sel_read_initcon(struct file * file, char __user *buf,
+static ssize_t sel_read_initcon(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct inode *inode;
inode = file->f_path.dentry->d_inode;
sid = inode->i_ino&SEL_INO_MASK;
ret = security_sid_to_context(sid, &con, &len);
- if (ret < 0)
+ if (ret)
return ret;
ret = simple_read_from_buffer(buf, count, ppos, con, len);
static const struct file_operations sel_initcon_ops = {
.read = sel_read_initcon,
+ .llseek = generic_file_llseek,
};
static int sel_make_initcon_files(struct dentry *dir)
{
- int i, ret = 0;
+ int i;
for (i = 1; i <= SECINITSID_NUM; i++) {
struct inode *inode;
struct dentry *dentry;
dentry = d_alloc_name(dir, security_get_initial_sid_context(i));
- if (!dentry) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!dentry)
+ return -ENOMEM;
inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
- if (!inode) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!inode)
+ return -ENOMEM;
+
inode->i_fop = &sel_initcon_ops;
inode->i_ino = i|SEL_INITCON_INO_OFFSET;
d_add(dentry, inode);
}
+
+ return 0;
+}
+
+static inline unsigned int sel_div(unsigned long a, unsigned long b)
+{
+ return a / b - (a % b < 0);
+}
+
+static inline unsigned long sel_class_to_ino(u16 class)
+{
+ return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET;
+}
+
+static inline u16 sel_ino_to_class(unsigned long ino)
+{
+ return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1);
+}
+
+static inline unsigned long sel_perm_to_ino(u16 class, u32 perm)
+{
+ return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET;
+}
+
+static inline u32 sel_ino_to_perm(unsigned long ino)
+{
+ return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1);
+}
+
+static ssize_t sel_read_class(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ ssize_t rc, len;
+ char *page;
+ unsigned long ino = file->f_path.dentry->d_inode->i_ino;
+
+ page = (char *)__get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino));
+ rc = simple_read_from_buffer(buf, count, ppos, page, len);
+ free_page((unsigned long)page);
+
+ return rc;
+}
+
+static const struct file_operations sel_class_ops = {
+ .read = sel_read_class,
+ .llseek = generic_file_llseek,
+};
+
+static ssize_t sel_read_perm(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ ssize_t rc, len;
+ char *page;
+ unsigned long ino = file->f_path.dentry->d_inode->i_ino;
+
+ page = (char *)__get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino));
+ rc = simple_read_from_buffer(buf, count, ppos, page, len);
+ free_page((unsigned long)page);
+
+ return rc;
+}
+
+static const struct file_operations sel_perm_ops = {
+ .read = sel_read_perm,
+ .llseek = generic_file_llseek,
+};
+
+static ssize_t sel_read_policycap(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ int value;
+ char tmpbuf[TMPBUFLEN];
+ ssize_t length;
+ unsigned long i_ino = file->f_path.dentry->d_inode->i_ino;
+
+ value = security_policycap_supported(i_ino & SEL_INO_MASK);
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value);
+
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations sel_policycap_ops = {
+ .read = sel_read_policycap,
+ .llseek = generic_file_llseek,
+};
+
+static int sel_make_perm_files(char *objclass, int classvalue,
+ struct dentry *dir)
+{
+ int i, rc, nperms;
+ char **perms;
+
+ rc = security_get_permissions(objclass, &perms, &nperms);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < nperms; i++) {
+ struct inode *inode;
+ struct dentry *dentry;
+
+ rc = -ENOMEM;
+ dentry = d_alloc_name(dir, perms[i]);
+ if (!dentry)
+ goto out;
+
+ rc = -ENOMEM;
+ inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+ if (!inode)
+ goto out;
+
+ inode->i_fop = &sel_perm_ops;
+ /* i+1 since perm values are 1-indexed */
+ inode->i_ino = sel_perm_to_ino(classvalue, i + 1);
+ d_add(dentry, inode);
+ }
+ rc = 0;
out:
- return ret;
+ for (i = 0; i < nperms; i++)
+ kfree(perms[i]);
+ kfree(perms);
+ return rc;
+}
+
+static int sel_make_class_dir_entries(char *classname, int index,
+ struct dentry *dir)
+{
+ struct dentry *dentry = NULL;
+ struct inode *inode = NULL;
+ int rc;
+
+ dentry = d_alloc_name(dir, "index");
+ if (!dentry)
+ return -ENOMEM;
+
+ inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+ if (!inode)
+ return -ENOMEM;
+
+ inode->i_fop = &sel_class_ops;
+ inode->i_ino = sel_class_to_ino(index);
+ d_add(dentry, inode);
+
+ dentry = d_alloc_name(dir, "perms");
+ if (!dentry)
+ return -ENOMEM;
+
+ rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino);
+ if (rc)
+ return rc;
+
+ rc = sel_make_perm_files(classname, index, dentry);
+
+ return rc;
+}
+
+static void sel_remove_classes(void)
+{
+ struct list_head *class_node;
+
+ list_for_each(class_node, &class_dir->d_subdirs) {
+ struct dentry *class_subdir = list_entry(class_node,
+ struct dentry, d_u.d_child);
+ struct list_head *class_subdir_node;
+
+ list_for_each(class_subdir_node, &class_subdir->d_subdirs) {
+ struct dentry *d = list_entry(class_subdir_node,
+ struct dentry, d_u.d_child);
+
+ if (d->d_inode)
+ if (d->d_inode->i_mode & S_IFDIR)
+ sel_remove_entries(d);
+ }
+
+ sel_remove_entries(class_subdir);
+ }
+
+ sel_remove_entries(class_dir);
+}
+
+static int sel_make_classes(void)
+{
+ int rc, nclasses, i;
+ char **classes;
+
+ /* delete any existing entries */
+ sel_remove_classes();
+
+ rc = security_get_classes(&classes, &nclasses);
+ if (rc)
+ return rc;
+
+ /* +2 since classes are 1-indexed */
+ last_class_ino = sel_class_to_ino(nclasses + 2);
+
+ for (i = 0; i < nclasses; i++) {
+ struct dentry *class_name_dir;
+
+ rc = -ENOMEM;
+ class_name_dir = d_alloc_name(class_dir, classes[i]);
+ if (!class_name_dir)
+ goto out;
+
+ rc = sel_make_dir(class_dir->d_inode, class_name_dir,
+ &last_class_ino);
+ if (rc)
+ goto out;
+
+ /* i+1 since class values are 1-indexed */
+ rc = sel_make_class_dir_entries(classes[i], i + 1,
+ class_name_dir);
+ if (rc)
+ goto out;
+ }
+ rc = 0;
+out:
+ for (i = 0; i < nclasses; i++)
+ kfree(classes[i]);
+ kfree(classes);
+ return rc;
+}
+
+static int sel_make_policycap(void)
+{
+ unsigned int iter;
+ struct dentry *dentry = NULL;
+ struct inode *inode = NULL;
+
+ sel_remove_entries(policycap_dir);
+
+ for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) {
+ if (iter < ARRAY_SIZE(policycap_names))
+ dentry = d_alloc_name(policycap_dir,
+ policycap_names[iter]);
+ else
+ dentry = d_alloc_name(policycap_dir, "unknown");
+
+ if (dentry == NULL)
+ return -ENOMEM;
+
+ inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO);
+ if (inode == NULL)
+ return -ENOMEM;
+
+ inode->i_fop = &sel_policycap_ops;
+ inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET;
+ d_add(dentry, inode);
+ }
+
+ return 0;
}
static int sel_make_dir(struct inode *dir, struct dentry *dentry,
unsigned long *ino)
{
- int ret = 0;
struct inode *inode;
inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO);
- if (!inode) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!inode)
+ return -ENOMEM;
+
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
inode->i_ino = ++(*ino);
d_add(dentry, inode);
/* bump link count on parent directory, too */
inc_nlink(dir);
-out:
- return ret;
+
+ return 0;
}
-static int sel_fill_super(struct super_block * sb, void * data, int silent)
+static int sel_fill_super(struct super_block *sb, void *data, int silent)
{
int ret;
struct dentry *dentry;
[SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR},
[SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR},
- [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR},
+ [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO},
+ [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO},
+ [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO},
+ [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUSR},
/* last one */ {""}
};
ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
root_inode = sb->s_root->d_inode;
+ ret = -ENOMEM;
dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME);
- if (!dentry) {
- ret = -ENOMEM;
+ if (!dentry)
goto err;
- }
ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
if (ret)
bool_dir = dentry;
+ ret = -ENOMEM;
dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME);
- if (!dentry) {
- ret = -ENOMEM;
+ if (!dentry)
goto err;
- }
+ ret = -ENOMEM;
inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO);
- if (!inode) {
- ret = -ENOMEM;
+ if (!inode)
goto err;
- }
+
inode->i_ino = ++sel_last_ino;
- isec = (struct inode_security_struct*)inode->i_security;
+ isec = (struct inode_security_struct *)inode->i_security;
isec->sid = SECINITSID_DEVNULL;
isec->sclass = SECCLASS_CHR_FILE;
isec->initialized = 1;
d_add(dentry, inode);
selinux_null = dentry;
+ ret = -ENOMEM;
dentry = d_alloc_name(sb->s_root, "avc");
- if (!dentry) {
- ret = -ENOMEM;
+ if (!dentry)
goto err;
- }
ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
if (ret)
if (ret)
goto err;
+ ret = -ENOMEM;
dentry = d_alloc_name(sb->s_root, "initial_contexts");
- if (!dentry) {
- ret = -ENOMEM;
+ if (!dentry)
goto err;
- }
ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
if (ret)
if (ret)
goto err;
-out:
- return ret;
+ ret = -ENOMEM;
+ dentry = d_alloc_name(sb->s_root, "class");
+ if (!dentry)
+ goto err;
+
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
+ if (ret)
+ goto err;
+
+ class_dir = dentry;
+
+ ret = -ENOMEM;
+ dentry = d_alloc_name(sb->s_root, "policy_capabilities");
+ if (!dentry)
+ goto err;
+
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
+ if (ret)
+ goto err;
+
+ policycap_dir = dentry;
+
+ return 0;
err:
- printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__);
- goto out;
+ printk(KERN_ERR "SELinux: %s: failed while creating inodes\n",
+ __func__);
+ return ret;
}
-static int sel_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data,
- struct vfsmount *mnt)
+static struct dentry *sel_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
{
- return get_sb_single(fs_type, flags, data, sel_fill_super, mnt);
+ return mount_single(fs_type, flags, data, sel_fill_super);
}
static struct file_system_type sel_fs_type = {
.name = "selinuxfs",
- .get_sb = sel_get_sb,
+ .mount = sel_mount,
.kill_sb = kill_litter_super,
};
struct vfsmount *selinuxfs_mount;
+static struct kobject *selinuxfs_kobj;
static int __init init_sel_fs(void)
{
if (!selinux_enabled)
return 0;
+
+ selinuxfs_kobj = kobject_create_and_add("selinux", fs_kobj);
+ if (!selinuxfs_kobj)
+ return -ENOMEM;
+
err = register_filesystem(&sel_fs_type);
- if (!err) {
- selinuxfs_mount = kern_mount(&sel_fs_type);
- if (IS_ERR(selinuxfs_mount)) {
- printk(KERN_ERR "selinuxfs: could not mount!\n");
- err = PTR_ERR(selinuxfs_mount);
- selinuxfs_mount = NULL;
- }
+ if (err) {
+ kobject_put(selinuxfs_kobj);
+ return err;
}
+
+ selinuxfs_mount = kern_mount(&sel_fs_type);
+ if (IS_ERR(selinuxfs_mount)) {
+ printk(KERN_ERR "selinuxfs: could not mount!\n");
+ err = PTR_ERR(selinuxfs_mount);
+ selinuxfs_mount = NULL;
+ }
+
return err;
}
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
void exit_sel_fs(void)
{
+ kobject_put(selinuxfs_kobj);
+ kern_unmount(selinuxfs_mount);
unregister_filesystem(&sel_fs_type);
}
#endif
Code Review / linux-2.6.git / blobdiff