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Diffstat (limited to 'security/selinux/selinuxfs.c')
-rw-r--r--security/selinux/selinuxfs.c173
1 files changed, 124 insertions, 49 deletions
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index f5f3e6da5da..0341567665b 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -2,6 +2,11 @@
*
* 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
@@ -35,6 +40,11 @@
#include "objsec.h"
#include "conditional.h"
+/* Policy capability filenames */
+static char *policycap_names[] = {
+ "network_peer_controls"
+};
+
unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
#ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
@@ -65,12 +75,16 @@ static DEFINE_MUTEX(sel_mutex);
/* global data for booleans */
static struct dentry *bool_dir = NULL;
static int bool_num = 0;
+static char **bool_pending_names;
static int *bool_pending_values = NULL;
/* global data for classes */
static struct dentry *class_dir = NULL;
static unsigned long last_class_ino;
+/* global data for policy capabilities */
+static struct dentry *policycap_dir = NULL;
+
extern void selnl_notify_setenforce(int val);
/* Check whether a task is allowed to use a security operation. */
@@ -110,10 +124,11 @@ enum sel_inos {
static unsigned long sel_last_ino = SEL_INO_NEXT - 1;
-#define SEL_INITCON_INO_OFFSET 0x01000000
-#define SEL_BOOL_INO_OFFSET 0x02000000
-#define SEL_CLASS_INO_OFFSET 0x04000000
-#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,
@@ -157,9 +172,10 @@ static ssize_t sel_write_enforce(struct file * file, const char __user * buf,
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);
@@ -228,8 +244,9 @@ static ssize_t sel_write_disable(struct file * file, const char __user * buf,
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));
+ "selinux=0 auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
}
length = count;
@@ -262,6 +279,7 @@ static const struct file_operations sel_policyvers_ops = {
/* 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,
@@ -322,6 +340,12 @@ static ssize_t sel_write_load(struct file * file, const char __user * buf,
}
ret = sel_make_classes();
+ if (ret) {
+ length = ret;
+ goto out1;
+ }
+
+ ret = sel_make_policycap();
if (ret)
length = ret;
else
@@ -334,8 +358,9 @@ out1:
(security_get_allow_unknown() ? "allow" : "deny")));
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);
@@ -832,15 +857,16 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
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)
+ if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
+ ret = -EINVAL;
goto out;
+ }
if (count > PAGE_SIZE) {
ret = -EINVAL;
@@ -851,15 +877,13 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
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);
@@ -872,9 +896,11 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
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);
@@ -882,16 +908,19 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
if (length)
goto out;
- /* check to see if this file has been deleted */
- if (!filep->f_op)
+ if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
+ length = -EINVAL;
goto out;
+ }
if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
}
+
if (*ppos != 0) {
/* No partial writes. */
+ length = -EINVAL;
goto out;
}
page = (char*)get_zeroed_page(GFP_KERNEL);
@@ -900,6 +929,7 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
goto out;
}
+ length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
@@ -910,8 +940,7 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
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:
@@ -931,7 +960,7 @@ 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);
@@ -940,10 +969,6 @@ static ssize_t sel_commit_bools_write(struct file *filep,
if (length)
goto out;
- /* check to see if this file has been deleted */
- if (!filep->f_op)
- goto out;
-
if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
@@ -958,6 +983,7 @@ static ssize_t sel_commit_bools_write(struct file *filep,
goto out;
}
+ length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
@@ -982,11 +1008,9 @@ static const struct file_operations sel_commit_bools_ops = {
.write = sel_commit_bools_write,
};
-/* 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);
node = de->d_subdirs.next;
@@ -1006,18 +1030,6 @@ static void sel_remove_entries(struct dentry *de)
}
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();
}
#define BOOL_DIR_NAME "booleans"
@@ -1036,7 +1048,9 @@ static int sel_make_bools(void)
u32 sid;
/* remove any existing files */
+ kfree(bool_pending_names);
kfree(bool_pending_values);
+ bool_pending_names = NULL;
bool_pending_values = NULL;
sel_remove_entries(dir);
@@ -1078,16 +1092,17 @@ static int sel_make_bools(void)
d_add(dentry, inode);
}
bool_num = num;
+ bool_pending_names = names;
bool_pending_values = values;
out:
free_page((unsigned long)page);
+ return ret;
+err:
if (names) {
for (i = 0; i < num; i++)
kfree(names[i]);
kfree(names);
}
- return ret;
-err:
kfree(values);
sel_remove_entries(dir);
ret = -ENOMEM;
@@ -1231,7 +1246,7 @@ static int sel_avc_stats_seq_show(struct seq_file *seq, void *v)
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,
@@ -1408,6 +1423,24 @@ static const struct file_operations sel_perm_ops = {
.read = sel_read_perm,
};
+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,
+};
+
static int sel_make_perm_files(char *objclass, int classvalue,
struct dentry *dir)
{
@@ -1554,6 +1587,36 @@ out:
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)
{
@@ -1682,6 +1745,18 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent)
class_dir = dentry;
+ dentry = d_alloc_name(sb->s_root, "policy_capabilities");
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
+ if (ret)
+ goto err;
+
+ policycap_dir = dentry;
+
out:
return ret;
err:
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-15 12:24:23 +0000