#include "objsec.h"
#include "conditional.h"
+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 DECLARE_MUTEX(sel_sem);
/* global data for booleans */
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;
SEL_MLS, /* return if MLS policy is enabled */
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
.write = sel_write_context,
};
+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;
+ ssize_t length;
+ unsigned int new_value;
+
+ length = task_has_security(current, SECURITY__SETCHECKREQPROT);
+ if (length)
+ return length;
+
+ if (count < 0 || 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;
+
+ 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_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,
};
static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
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 = kmalloc(size+1, GFP_KERNEL);
+ if (!scon)
+ return length;
+ memset(scon, 0, size+1);
+
+ tcon = kmalloc(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)
+ 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);
ret = count;
out_free:
free_page((unsigned long)page);
-out:
+out:
return ret;
}
{
char *page;
ssize_t ret = 0;
-
+
page = (char *)__get_free_page(GFP_KERNEL);
if (!page) {
ret = -ENOMEM;
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;
if (*pos == 0)
return SEQ_START_TOKEN;
-
+
return sel_avc_get_stat_idx(&n);
}
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");
};
#endif
-/* XXX upstream: d_alloc_name() */
-struct dentry *sel_alloc_name(struct dentry *parent, const char *name)
-{
- struct qstr q;
-
- q.name = name;
- q.len = strlen(name);
- q.hash = full_name_hash(q.name, q.len);
- return d_alloc(parent, &q);
-}
-
static int sel_make_avc_files(struct dentry *dir)
{
int i, ret = 0;
struct inode *inode;
struct dentry *dentry;
- dentry = sel_alloc_name(dir, files[i].name);
+ dentry = d_alloc_name(dir, files[i].name);
if (!dentry) {
ret = -ENOMEM;
goto err;
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
d_add(dentry, inode);
-out:
+out:
return ret;
}
[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);
init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3));
d_add(dentry, inode);
selinux_null = dentry;
-
- dentry = sel_alloc_name(sb->s_root, "avc");
+
+ dentry = d_alloc_name(sb->s_root, "avc");
if (!dentry)
return -ENOMEM;
-
+
ret = sel_make_dir(sb, dentry);
if (ret)
goto out;
-
+
ret = sel_make_avc_files(dentry);
if (ret)
goto out;
-
+
return 0;
out:
dput(dentry);
git://git.onelab.eu / linux-2.6.git / blobdiff