* Added conditional policy language extensions
*
* 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
* the Free Software Foundation, version 2.
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
+#include <linux/mutex.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/security.h>
+#include <linux/major.h>
+#include <linux/seq_file.h>
+#include <linux/percpu.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include "objsec.h"
#include "conditional.h"
-static DECLARE_MUTEX(sel_sem);
+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;
+ return 1;
+}
+__setup("checkreqprot=", checkreqprot_setup);
+
+
+static DEFINE_MUTEX(sel_mutex);
/* global data for booleans */
static struct dentry *bool_dir = NULL;
extern void selnl_notify_setenforce(int val);
/* Check whether a task is allowed to use a security operation. */
-int task_has_security(struct task_struct *tsk,
- u32 perms)
+static int task_has_security(struct task_struct *tsk,
+ u32 perms)
{
struct task_security_struct *tsec;
return -EACCES;
return avc_has_perm(tsec->sid, SECINITSID_SECURITY,
- SECCLASS_SECURITY, perms, NULL, NULL);
+ SECCLASS_SECURITY, perms, NULL);
}
enum sel_inos {
SEL_POLICYVERS, /* return policy version for this kernel */
SEL_COMMIT_BOOLS, /* commit new boolean values */
SEL_MLS, /* return if MLS policy is enabled */
- SEL_DISABLE /* disable SELinux until next reboot */
+ SEL_DISABLE, /* disable SELinux until next reboot */
+ SEL_AVC, /* AVC management directory */
+ SEL_MEMBER, /* compute polyinstantiation membership decision */
+ SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
};
+#define TMPBUFLEN 12
static ssize_t sel_read_enforce(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char tmpbuf[TMPBUFLEN];
ssize_t length;
- ssize_t end;
- if (count < 0 || count > PAGE_SIZE)
- return -EINVAL;
- if (!(page = (char*)__get_free_page(GFP_KERNEL)))
- return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
-
- length = scnprintf(page, PAGE_SIZE, "%d", selinux_enforcing);
- if (length < 0) {
- free_page((unsigned long)page);
- return length;
- }
-
- if (*ppos >= length) {
- free_page((unsigned long)page);
- return 0;
- }
- if (count + *ppos > length)
- count = length - *ppos;
- end = count + *ppos;
- if (copy_to_user(buf, (char *) page + *ppos, count)) {
- count = -EFAULT;
- goto out;
- }
- *ppos = end;
-out:
- free_page((unsigned long)page);
- return count;
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing);
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
ssize_t length;
int new_value;
- if (count < 0 || count >= PAGE_SIZE)
+ if (count >= PAGE_SIZE)
return -ENOMEM;
if (*ppos != 0) {
/* No partial writes. */
return -EINVAL;
}
- page = (char*)__get_free_page(GFP_KERNEL);
+ page = (char*)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
length = task_has_security(current, SECURITY__SETENFORCE);
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));
selinux_enforcing = new_value;
if (selinux_enforcing)
avc_ss_reset(0);
int new_value;
extern int selinux_disable(void);
- if (count < 0 || count >= PAGE_SIZE)
+ if (count >= PAGE_SIZE)
return -ENOMEM;
if (*ppos != 0) {
/* No partial writes. */
return -EINVAL;
}
- page = (char*)__get_free_page(GFP_KERNEL);
+ page = (char*)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
length = selinux_disable();
if (length < 0)
goto out;
+ audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
+ "selinux=0 auid=%u",
+ audit_get_loginuid(current->audit_context));
}
length = count;
static ssize_t sel_read_policyvers(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char tmpbuf[TMPBUFLEN];
ssize_t length;
- ssize_t end;
- if (count < 0 || count > PAGE_SIZE)
- return -EINVAL;
- if (!(page = (char*)__get_free_page(GFP_KERNEL)))
- return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
-
- length = scnprintf(page, PAGE_SIZE, "%u", POLICYDB_VERSION_MAX);
- if (length < 0) {
- free_page((unsigned long)page);
- return length;
- }
-
- if (*ppos >= length) {
- free_page((unsigned long)page);
- return 0;
- }
- if (count + *ppos > length)
- count = length - *ppos;
- end = count + *ppos;
- if (copy_to_user(buf, (char *) page + *ppos, count)) {
- count = -EFAULT;
- goto out;
- }
- *ppos = end;
-out:
- free_page((unsigned long)page);
- return count;
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX);
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
static struct file_operations sel_policyvers_ops = {
static ssize_t sel_read_mls(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
- char *page;
+ char tmpbuf[TMPBUFLEN];
ssize_t length;
- ssize_t end;
-
- if (count < 0 || count > PAGE_SIZE)
- return -EINVAL;
- if (!(page = (char*)__get_free_page(GFP_KERNEL)))
- return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
- length = scnprintf(page, PAGE_SIZE, "%d", selinux_mls_enabled);
- if (length < 0) {
- free_page((unsigned long)page);
- return length;
- }
-
- if (*ppos >= length) {
- free_page((unsigned long)page);
- return 0;
- }
- if (count + *ppos > length)
- count = length - *ppos;
- end = count + *ppos;
- if (copy_to_user(buf, (char *) page + *ppos, count)) {
- count = -EFAULT;
- goto out;
- }
- *ppos = end;
-out:
- free_page((unsigned long)page);
- return count;
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled);
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
static struct file_operations sel_mls_ops = {
ssize_t length;
void *data = NULL;
- down(&sel_sem);
+ mutex_lock(&sel_mutex);
length = task_has_security(current, SECURITY__LOAD_POLICY);
if (length)
goto out;
}
- if ((count < 0) || (count > 64 * 1024 * 1024)
+ if ((count > 64 * 1024 * 1024)
|| (data = vmalloc(count)) == NULL) {
length = -ENOMEM;
goto out;
length = ret;
else
length = count;
+ audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
+ "policy loaded auid=%u",
+ audit_get_loginuid(current->audit_context));
out:
- up(&sel_sem);
+ mutex_unlock(&sel_mutex);
vfree(data);
return length;
}
.write = sel_write_load,
};
+static ssize_t sel_write_context(struct file * file, char *buf, size_t size)
+{
+ char *canon;
+ u32 sid, len;
+ ssize_t length;
-static ssize_t sel_write_context(struct file * file, const char __user * buf,
- size_t count, loff_t *ppos)
+ length = task_has_security(current, SECURITY__CHECK_CONTEXT);
+ if (length)
+ return length;
+
+ length = security_context_to_sid(buf, size, &sid);
+ if (length < 0)
+ return length;
+ length = security_sid_to_context(sid, &canon, &len);
+ if (length < 0)
+ return length;
+
+ if (len > SIMPLE_TRANSACTION_LIMIT) {
+ printk(KERN_ERR "%s: context size (%u) exceeds payload "
+ "max\n", __FUNCTION__, len);
+ length = -ERANGE;
+ goto out;
+ }
+
+ memcpy(buf, canon, len);
+ length = len;
+out:
+ kfree(canon);
+ return length;
+}
+
+static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char tmpbuf[TMPBUFLEN];
+ ssize_t length;
+
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot);
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf,
+ size_t count, loff_t *ppos)
{
char *page;
- u32 sid;
ssize_t length;
+ unsigned int new_value;
- length = task_has_security(current, SECURITY__CHECK_CONTEXT);
+ length = task_has_security(current, SECURITY__SETCHECKREQPROT);
if (length)
return length;
- if (count < 0 || count >= PAGE_SIZE)
+ if (count >= PAGE_SIZE)
return -ENOMEM;
if (*ppos != 0) {
/* No partial writes. */
return -EINVAL;
}
- page = (char*)__get_free_page(GFP_KERNEL);
+ page = (char*)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
- length = security_context_to_sid(page, count, &sid);
- if (length < 0)
+ length = -EINVAL;
+ if (sscanf(page, "%u", &new_value) != 1)
goto out;
+ selinux_checkreqprot = new_value ? 1 : 0;
length = count;
out:
free_page((unsigned long) page);
return length;
}
-
-static struct file_operations sel_context_ops = {
- .write = sel_write_context,
+static struct file_operations sel_checkreqprot_ops = {
+ .read = sel_read_checkreqprot,
+ .write = sel_write_checkreqprot,
};
-
/*
* Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
*/
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,
[SEL_CREATE] = sel_write_create,
[SEL_RELABEL] = sel_write_relabel,
[SEL_USER] = sel_write_user,
+ [SEL_MEMBER] = sel_write_member,
+ [SEL_CONTEXT] = sel_write_context,
};
-/* an argresp is stored in an allocated page and holds the
- * size of the argument or response, along with its content
- */
-struct argresp {
- ssize_t size;
- char data[0];
-};
-
-#define PAYLOAD_SIZE (PAGE_SIZE - sizeof(struct argresp))
-
-/*
- * transaction based IO methods.
- * The file expects a single write which triggers the transaction, and then
- * possibly a read which collects the result - which is stored in a
- * file-local buffer.
- */
-static ssize_t TA_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
+static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
{
ino_t ino = file->f_dentry->d_inode->i_ino;
- struct argresp *ar;
- ssize_t rv = 0;
+ char *data;
+ ssize_t rv;
- if (ino >= sizeof(write_op)/sizeof(write_op[0]) || !write_op[ino])
+ if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
return -EINVAL;
- if (file->private_data)
- return -EINVAL; /* only one write allowed per open */
- if (size > PAYLOAD_SIZE - 1) /* allow one byte for null terminator */
- return -EFBIG;
- ar = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!ar)
- return -ENOMEM;
- memset(ar, 0, PAGE_SIZE); /* clear buffer, particularly last byte */
- ar->size = 0;
- down(&file->f_dentry->d_inode->i_sem);
- if (file->private_data)
- rv = -EINVAL;
- else
- file->private_data = ar;
- up(&file->f_dentry->d_inode->i_sem);
- if (rv) {
- kfree(ar);
- return rv;
- }
- if (copy_from_user(ar->data, buf, size))
- return -EFAULT;
+ data = simple_transaction_get(file, buf, size);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
- rv = write_op[ino](file, ar->data, size);
+ rv = write_op[ino](file, data, size);
if (rv>0) {
- ar->size = rv;
+ simple_transaction_set(file, rv);
rv = size;
}
return rv;
}
-static ssize_t TA_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
-{
- struct argresp *ar;
- ssize_t rv = 0;
-
- if (file->private_data == NULL)
- rv = TA_write(file, buf, 0, pos);
- if (rv < 0)
- return rv;
-
- ar = file->private_data;
- if (!ar)
- return 0;
- if (*pos >= ar->size)
- return 0;
- if (*pos + size > ar->size)
- size = ar->size - *pos;
- if (copy_to_user(buf, ar->data + *pos, size))
- return -EFAULT;
- *pos += size;
- return size;
-}
-
-static int TA_open(struct inode *inode, struct file *file)
-{
- file->private_data = NULL;
- return 0;
-}
-
-static int TA_release(struct inode *inode, struct file *file)
-{
- void *p = file->private_data;
- file->private_data = NULL;
- kfree(p);
- return 0;
-}
-
static struct file_operations transaction_ops = {
- .write = TA_write,
- .read = TA_read,
- .open = TA_open,
- .release = TA_release,
+ .write = selinux_transaction_write,
+ .read = simple_transaction_read,
+ .release = simple_transaction_release,
};
/*
return length;
length = -ENOMEM;
- scon = kmalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size+1, GFP_KERNEL);
if (!scon)
return length;
- memset(scon, 0, size+1);
- tcon = kmalloc(size+1, GFP_KERNEL);
+ tcon = kzalloc(size+1, GFP_KERNEL);
if (!tcon)
goto out;
- memset(tcon, 0, size+1);
length = -EINVAL;
if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4)
if (length < 0)
goto out2;
- length = scnprintf(buf, PAYLOAD_SIZE, "%x %x %x %x %u",
+ length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT,
+ "%x %x %x %x %u",
avd.allowed, avd.decided,
avd.auditallow, avd.auditdeny,
avd.seqno);
return length;
length = -ENOMEM;
- scon = kmalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size+1, GFP_KERNEL);
if (!scon)
return length;
- memset(scon, 0, size+1);
- tcon = kmalloc(size+1, GFP_KERNEL);
+ tcon = kzalloc(size+1, GFP_KERNEL);
if (!tcon)
goto out;
- memset(tcon, 0, size+1);
length = -EINVAL;
if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
if (length < 0)
goto out2;
- if (len > PAYLOAD_SIZE) {
+ if (len > SIMPLE_TRANSACTION_LIMIT) {
printk(KERN_ERR "%s: context size (%u) exceeds payload "
"max\n", __FUNCTION__, len);
length = -ERANGE;
return length;
length = -ENOMEM;
- scon = kmalloc(size+1, GFP_KERNEL);
+ scon = kzalloc(size+1, GFP_KERNEL);
if (!scon)
return length;
- memset(scon, 0, size+1);
- tcon = kmalloc(size+1, GFP_KERNEL);
+ tcon = kzalloc(size+1, GFP_KERNEL);
if (!tcon)
goto out;
- memset(tcon, 0, size+1);
length = -EINVAL;
if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
if (length < 0)
goto out2;
- if (len > PAYLOAD_SIZE) {
+ if (len > SIMPLE_TRANSACTION_LIMIT) {
length = -ERANGE;
goto out3;
}
return length;
length = -ENOMEM;
- con = kmalloc(size+1, GFP_KERNEL);
+ con = kzalloc(size+1, GFP_KERNEL);
if (!con)
return length;
- memset(con, 0, size+1);
- user = kmalloc(size+1, GFP_KERNEL);
+ user = kzalloc(size+1, GFP_KERNEL);
if (!user)
goto out;
- memset(user, 0, size+1);
length = -EINVAL;
if (sscanf(buf, "%s %s", con, user) != 2)
length = rc;
goto out3;
}
- if ((length + len) >= PAYLOAD_SIZE) {
+ if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) {
kfree(newcon);
length = -ERANGE;
goto out3;
return length;
}
+static ssize_t sel_write_member(struct file * file, char *buf, size_t size)
+{
+ char *scon, *tcon;
+ u32 ssid, tsid, newsid;
+ u16 tclass;
+ ssize_t length;
+ char *newcon;
+ u32 len;
+
+ length = task_has_security(current, SECURITY__COMPUTE_MEMBER);
+ if (length)
+ return length;
+
+ length = -ENOMEM;
+ scon = kzalloc(size+1, GFP_KERNEL);
+ if (!scon)
+ return length;
+
+ tcon = kzalloc(size+1, GFP_KERNEL);
+ if (!tcon)
+ goto out;
+
+ length = -EINVAL;
+ if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+ goto out2;
+
+ 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_member_sid(ssid, tsid, tclass, &newsid);
+ if (length < 0)
+ goto out2;
+
+ length = security_sid_to_context(newsid, &newcon, &len);
+ if (length < 0)
+ goto out2;
+
+ if (len > SIMPLE_TRANSACTION_LIMIT) {
+ printk(KERN_ERR "%s: context size (%u) exceeds payload "
+ "max\n", __FUNCTION__, len);
+ length = -ERANGE;
+ goto out3;
+ }
+
+ memcpy(buf, newcon, len);
+ length = len;
+out3:
+ kfree(newcon);
+out2:
+ kfree(tcon);
+out:
+ kfree(scon);
+ return length;
+}
+
static struct inode *sel_make_inode(struct super_block *sb, int mode)
{
struct inode *ret = new_inode(sb);
{
char *page = NULL;
ssize_t length;
- ssize_t end;
ssize_t ret;
int cur_enforcing;
struct inode *inode;
- down(&sel_sem);
+ mutex_lock(&sel_mutex);
ret = -EFAULT;
if (!filep->f_op)
goto out;
- if (count < 0 || count > PAGE_SIZE) {
+ if (count > PAGE_SIZE) {
ret = -EINVAL;
goto out;
}
- if (!(page = (char*)__get_free_page(GFP_KERNEL))) {
+ if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) {
ret = -ENOMEM;
goto out;
}
- memset(page, 0, PAGE_SIZE);
inode = filep->f_dentry->d_inode;
cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET);
length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]);
- if (length < 0) {
- ret = length;
- goto out;
- }
-
- if (*ppos >= length) {
- ret = 0;
- goto out;
- }
- if (count + *ppos > length)
- count = length - *ppos;
- end = count + *ppos;
- if (copy_to_user(buf, (char *) page + *ppos, count)) {
- ret = -EFAULT;
- goto out;
- }
- *ppos = end;
- ret = count;
+ ret = simple_read_from_buffer(buf, count, ppos, page, length);
out:
- up(&sel_sem);
+ mutex_unlock(&sel_mutex);
if (page)
free_page((unsigned long)page);
return ret;
int new_value;
struct inode *inode;
- down(&sel_sem);
+ mutex_lock(&sel_mutex);
length = task_has_security(current, SECURITY__SETBOOL);
if (length)
if (!filep->f_op)
goto out;
- if (count < 0 || count >= PAGE_SIZE) {
+ if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
}
/* No partial writes. */
goto out;
}
- page = (char*)__get_free_page(GFP_KERNEL);
+ page = (char*)get_zeroed_page(GFP_KERNEL);
if (!page) {
length = -ENOMEM;
goto out;
}
- memset(page, 0, PAGE_SIZE);
if (copy_from_user(page, buf, count))
goto out;
length = count;
out:
- up(&sel_sem);
+ mutex_unlock(&sel_mutex);
if (page)
free_page((unsigned long) page);
return length;
ssize_t length = -EFAULT;
int new_value;
- down(&sel_sem);
+ mutex_lock(&sel_mutex);
length = task_has_security(current, SECURITY__SETBOOL);
if (length)
if (!filep->f_op)
goto out;
- if (count < 0 || count >= PAGE_SIZE) {
+ if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
}
/* No partial writes. */
goto out;
}
- page = (char*)__get_free_page(GFP_KERNEL);
+ page = (char*)get_zeroed_page(GFP_KERNEL);
if (!page) {
length = -ENOMEM;
goto out;
}
- memset(page, 0, PAGE_SIZE);
-
if (copy_from_user(page, buf, count))
goto out;
if (sscanf(page, "%d", &new_value) != 1)
goto out;
- if (new_value) {
+ if (new_value && bool_pending_values) {
security_set_bools(bool_num, bool_pending_values);
}
length = count;
out:
- up(&sel_sem);
+ mutex_unlock(&sel_mutex);
if (page)
free_page((unsigned long) page);
return length;
spin_lock(&dcache_lock);
node = de->d_subdirs.next;
while (node != &de->d_subdirs) {
- struct dentry *d = list_entry(node, struct dentry, d_child);
+ struct dentry *d = list_entry(node, struct dentry, d_u.d_child);
list_del_init(node);
if (d->d_inode) {
file_list_lock();
list_for_each(p, &sb->s_files) {
- struct file * filp = list_entry(p, struct file, f_list);
+ struct file * filp = list_entry(p, struct file, f_u.fu_list);
struct dentry * dentry = filp->f_dentry;
if (dentry->d_parent != de) {
struct dentry *dir = bool_dir;
struct inode *inode = NULL;
struct inode_security_struct *isec;
- struct qstr qname;
char **names = NULL, *page;
int num;
int *values = NULL;
u32 sid;
/* remove any existing files */
- if (bool_pending_values)
- kfree(bool_pending_values);
+ kfree(bool_pending_values);
+ bool_pending_values = NULL;
sel_remove_bools(dir);
- if (!(page = (char*)__get_free_page(GFP_KERNEL)))
+ if (!(page = (char*)get_zeroed_page(GFP_KERNEL)))
return -ENOMEM;
- memset(page, 0, PAGE_SIZE);
ret = security_get_bools(&num, &names, &values);
if (ret != 0)
goto out;
for (i = 0; i < num; i++) {
- qname.name = names[i];
- qname.len = strlen(qname.name);
- qname.hash = full_name_hash(qname.name, qname.len);
- dentry = d_alloc(dir, &qname);
+ dentry = d_alloc_name(dir, names[i]);
if (!dentry) {
ret = -ENOMEM;
goto err;
out:
free_page((unsigned long)page);
if (names) {
- for (i = 0; i < num; i++) {
- if (names[i])
- kfree(names[i]);
- }
+ for (i = 0; i < num; i++)
+ kfree(names[i]);
kfree(names);
}
return ret;
err:
- d_genocide(dir);
+ kfree(values);
+ sel_remove_bools(dir);
ret = -ENOMEM;
goto out;
}
+#define NULL_FILE_NAME "null"
+
+struct dentry *selinux_null = NULL;
+
+static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char tmpbuf[TMPBUFLEN];
+ ssize_t length;
+
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold);
+ 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,
+ size_t count, loff_t *ppos)
+
+{
+ char *page;
+ ssize_t ret;
+ int new_value;
+
+ if (count >= PAGE_SIZE) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (*ppos != 0) {
+ /* No partial writes. */
+ ret = -EINVAL;
+ goto out;
+ }
+
+ page = (char*)get_zeroed_page(GFP_KERNEL);
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (copy_from_user(page, buf, count)) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+
+ if (sscanf(page, "%u", &new_value) != 1) {
+ ret = -EINVAL;
+ 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 = count;
+out_free:
+ free_page((unsigned long)page);
+out:
+ return ret;
+}
+
+static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *page;
+ ssize_t ret = 0;
+
+ 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);
+ free_page((unsigned long)page);
+out:
+ return ret;
+}
+
+static struct file_operations sel_avc_cache_threshold_ops = {
+ .read = sel_read_avc_cache_threshold,
+ .write = sel_write_avc_cache_threshold,
+};
+
+static struct file_operations sel_avc_hash_stats_ops = {
+ .read = sel_read_avc_hash_stats,
+};
+
+#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
+static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx)
+{
+ int cpu;
+
+ for (cpu = *idx; cpu < NR_CPUS; ++cpu) {
+ if (!cpu_possible(cpu))
+ continue;
+ *idx = cpu + 1;
+ return &per_cpu(avc_cache_stats, cpu);
+ }
+ return NULL;
+}
+
+static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ loff_t n = *pos - 1;
+
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ return sel_avc_get_stat_idx(&n);
+}
+
+static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return sel_avc_get_stat_idx(pos);
+}
+
+static int sel_avc_stats_seq_show(struct seq_file *seq, void *v)
+{
+ struct avc_cache_stats *st = v;
+
+ 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,
+ 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 = {
+ .start = sel_avc_stats_seq_start,
+ .next = sel_avc_stats_seq_next,
+ .show = sel_avc_stats_seq_show,
+ .stop = sel_avc_stats_seq_stop,
+};
+
+static int sel_open_avc_cache_stats(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &sel_avc_cache_stats_seq_ops);
+}
+
+static struct file_operations sel_avc_cache_stats_ops = {
+ .open = sel_open_avc_cache_stats,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+#endif
+
+static int sel_make_avc_files(struct dentry *dir)
+{
+ int i, ret = 0;
+ static struct tree_descr files[] = {
+ { "cache_threshold",
+ &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
+ { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO },
+#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
+ { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO },
+#endif
+ };
+
+ for (i = 0; i < ARRAY_SIZE(files); i++) {
+ struct inode *inode;
+ struct dentry *dentry;
+
+ dentry = d_alloc_name(dir, files[i].name);
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode);
+ if (!inode) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ inode->i_fop = files[i].ops;
+ d_add(dentry, inode);
+ }
+out:
+ return ret;
+}
+
+static int sel_make_dir(struct inode *dir, struct dentry *dentry)
+{
+ 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;
+ }
+ inode->i_op = &simple_dir_inode_operations;
+ inode->i_fop = &simple_dir_operations;
+ /* directory inodes start off with i_nlink == 2 (for "." entry) */
+ inode->i_nlink++;
+ d_add(dentry, inode);
+ /* bump link count on parent directory, too */
+ dir->i_nlink++;
+out:
+ return ret;
+}
+
static int sel_fill_super(struct super_block * sb, void * data, int silent)
{
int ret;
struct dentry *dentry;
- struct inode *inode;
- struct qstr qname;
+ struct inode *inode, *root_inode;
+ struct inode_security_struct *isec;
static struct tree_descr selinux_files[] = {
[SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR},
[SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR},
- [SEL_CONTEXT] = {"context", &sel_context_ops, S_IRUGO|S_IWUGO},
+ [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR},
[SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO},
[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},
/* last one */ {""}
};
ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
if (ret)
- return ret;
+ goto err;
- qname.name = BOOL_DIR_NAME;
- qname.len = strlen(qname.name);
- qname.hash = full_name_hash(qname.name, qname.len);
- dentry = d_alloc(sb->s_root, &qname);
- if (!dentry)
- return -ENOMEM;
+ root_inode = sb->s_root->d_inode;
+
+ dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME);
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sel_make_dir(root_inode, dentry);
+ if (ret)
+ goto err;
- inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO);
- if (!inode)
- goto out;
- inode->i_op = &simple_dir_inode_operations;
- inode->i_fop = &simple_dir_operations;
- d_add(dentry, inode);
bool_dir = dentry;
- ret = sel_make_bools();
+
+ dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME);
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO);
+ if (!inode) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ isec = (struct inode_security_struct*)inode->i_security;
+ isec->sid = SECINITSID_DEVNULL;
+ isec->sclass = SECCLASS_CHR_FILE;
+ isec->initialized = 1;
+
+ init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3));
+ d_add(dentry, inode);
+ selinux_null = dentry;
+
+ dentry = d_alloc_name(sb->s_root, "avc");
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sel_make_dir(root_inode, dentry);
if (ret)
- goto out;
+ goto err;
- return 0;
+ ret = sel_make_avc_files(dentry);
+ if (ret)
+ goto err;
out:
- dput(dentry);
- printk(KERN_ERR "security: error creating conditional out_dput\n");
- return -ENOMEM;
+ return ret;
+err:
+ printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__);
+ goto out;
}
static struct super_block *sel_get_sb(struct file_system_type *fs_type,
.kill_sb = kill_litter_super,
};
+struct vfsmount *selinuxfs_mount;
+
static int __init init_sel_fs(void)
{
- return selinux_enabled ? register_filesystem(&sel_fs_type) : 0;
+ int err;
+
+ if (!selinux_enabled)
+ return 0;
+ 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;
+ }
+ }
+ return err;
}
__initcall(init_sel_fs);
git://git.onelab.eu / linux-2.6.git / blobdiff