*
* Added support for bounds domain and audit messaged on masked permissions
*
+ * Updated: Guido Trentalancia <guido@trentalancia.com>
+ *
+ * Added support for runtime switching of the policy type
+ *
* Copyright (C) 2008, 2009 NEC Corporation
* Copyright (C) 2006, 2007 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
#include <linux/audit.h>
#include <linux/mutex.h>
#include <linux/selinux.h>
+#include <linux/flex_array.h>
+#include <linux/vmalloc.h>
#include <net/netlabel.h>
#include "flask.h"
}
}
+int security_mls_enabled(void)
+{
+ return policydb.mls_enabled;
+}
/*
* Return the boolean value of a constraint expression
case CEXPR_AND:
BUG_ON(sp < 1);
sp--;
- s[sp] &= s[sp+1];
+ s[sp] &= s[sp + 1];
break;
case CEXPR_OR:
BUG_ON(sp < 1);
sp--;
- s[sp] |= s[sp+1];
+ s[sp] |= s[sp + 1];
break;
case CEXPR_ATTR:
- if (sp == (CEXPR_MAXDEPTH-1))
+ if (sp == (CEXPR_MAXDEPTH - 1))
return 0;
switch (e->attr) {
case CEXPR_USER:
char *scontext_name = NULL;
char *tcontext_name = NULL;
char *permission_names[32];
- int index, length;
+ int index;
+ u32 length;
bool need_comma = false;
if (!permissions)
struct context lo_scontext;
struct context lo_tcontext;
struct av_decision lo_avd;
- struct type_datum *source
- = policydb.type_val_to_struct[scontext->type - 1];
- struct type_datum *target
- = policydb.type_val_to_struct[tcontext->type - 1];
+ struct type_datum *source;
+ struct type_datum *target;
u32 masked = 0;
+ source = flex_array_get_ptr(policydb.type_val_to_struct_array,
+ scontext->type - 1);
+ BUG_ON(!source);
+
+ target = flex_array_get_ptr(policydb.type_val_to_struct_array,
+ tcontext->type - 1);
+ BUG_ON(!target);
+
if (source->bounds) {
memset(&lo_avd, 0, sizeof(lo_avd));
*/
avkey.target_class = tclass;
avkey.specified = AVTAB_AV;
- sattr = &policydb.type_attr_map[scontext->type - 1];
- tattr = &policydb.type_attr_map[tcontext->type - 1];
+ sattr = flex_array_get(policydb.type_attr_map_array, scontext->type - 1);
+ BUG_ON(!sattr);
+ tattr = flex_array_get(policydb.type_attr_map_array, tcontext->type - 1);
+ BUG_ON(!tattr);
ebitmap_for_each_positive_bit(sattr, snode, i) {
ebitmap_for_each_positive_bit(tattr, tnode, j) {
avkey.source_type = i + 1;
char *o = NULL, *n = NULL, *t = NULL;
u32 olen, nlen, tlen;
- if (context_struct_to_string(ocontext, &o, &olen) < 0)
+ if (context_struct_to_string(ocontext, &o, &olen))
goto out;
- if (context_struct_to_string(ncontext, &n, &nlen) < 0)
+ if (context_struct_to_string(ncontext, &n, &nlen))
goto out;
- if (context_struct_to_string(tcontext, &t, &tlen) < 0)
+ if (context_struct_to_string(tcontext, &t, &tlen))
goto out;
audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"security_validate_transition: denied for"
struct context *old_context, *new_context;
struct type_datum *type;
int index;
- int rc = -EINVAL;
+ int rc;
read_lock(&policy_rwlock);
+ rc = -EINVAL;
old_context = sidtab_search(&sidtab, old_sid);
if (!old_context) {
printk(KERN_ERR "SELinux: %s: unrecognized SID %u\n",
goto out;
}
+ rc = -EINVAL;
new_context = sidtab_search(&sidtab, new_sid);
if (!new_context) {
printk(KERN_ERR "SELinux: %s: unrecognized SID %u\n",
goto out;
}
- /* type/domain unchaned */
- if (old_context->type == new_context->type) {
- rc = 0;
+ rc = 0;
+ /* type/domain unchanged */
+ if (old_context->type == new_context->type)
goto out;
- }
index = new_context->type;
while (true) {
- type = policydb.type_val_to_struct[index - 1];
+ type = flex_array_get_ptr(policydb.type_val_to_struct_array,
+ index - 1);
BUG_ON(!type);
/* not bounded anymore */
- if (!type->bounds) {
- rc = -EPERM;
+ rc = -EPERM;
+ if (!type->bounds)
break;
- }
/* @newsid is bounded by @oldsid */
- if (type->bounds == old_context->type) {
- rc = 0;
+ rc = 0;
+ if (type->bounds == old_context->type)
break;
- }
+
index = type->bounds;
}
if (rc) {
char *old_name = NULL;
char *new_name = NULL;
- int length;
+ u32 length;
if (!context_struct_to_string(old_context,
&old_name, &length) &&
{
char *scontextp;
- *scontext = NULL;
+ if (scontext)
+ *scontext = NULL;
*scontext_len = 0;
if (context->len) {
*scontext_len += strlen(policydb.p_type_val_to_name[context->type - 1]) + 1;
*scontext_len += mls_compute_context_len(context);
+ if (!scontext)
+ return 0;
+
/* Allocate space for the context; caller must free this space. */
scontextp = kmalloc(*scontext_len, GFP_ATOMIC);
if (!scontextp)
struct context *context;
int rc = 0;
- *scontext = NULL;
+ if (scontext)
+ *scontext = NULL;
*scontext_len = 0;
if (!ss_initialized) {
char *scontextp;
*scontext_len = strlen(initial_sid_to_string[sid]) + 1;
+ if (!scontext)
+ goto out;
scontextp = kmalloc(*scontext_len, GFP_ATOMIC);
if (!scontextp) {
rc = -ENOMEM;
if (rc)
goto out;
- if ((p - scontext) < scontext_len) {
- rc = -EINVAL;
+ rc = -EINVAL;
+ if ((p - scontext) < scontext_len)
goto out;
- }
/* Check the validity of the new context. */
- if (!policydb_context_isvalid(pol, ctx)) {
- rc = -EINVAL;
+ if (!policydb_context_isvalid(pol, ctx))
goto out;
- }
rc = 0;
out:
if (rc)
*sid = SECSID_NULL;
/* Copy the string so that we can modify the copy as we parse it. */
- scontext2 = kmalloc(scontext_len+1, gfp_flags);
+ scontext2 = kmalloc(scontext_len + 1, gfp_flags);
if (!scontext2)
return -ENOMEM;
memcpy(scontext2, scontext, scontext_len);
if (force) {
/* Save another copy for storing in uninterpreted form */
+ rc = -ENOMEM;
str = kstrdup(scontext2, gfp_flags);
- if (!str) {
- kfree(scontext2);
- return -ENOMEM;
- }
+ if (!str)
+ goto out;
}
read_lock(&policy_rwlock);
- rc = string_to_context_struct(&policydb, &sidtab,
- scontext2, scontext_len,
- &context, def_sid);
+ rc = string_to_context_struct(&policydb, &sidtab, scontext2,
+ scontext_len, &context, def_sid);
if (rc == -EINVAL && force) {
context.str = str;
context.len = scontext_len;
str = NULL;
} else if (rc)
- goto out;
+ goto out_unlock;
rc = sidtab_context_to_sid(&sidtab, &context, sid);
context_destroy(&context);
-out:
+out_unlock:
read_unlock(&policy_rwlock);
+out:
kfree(scontext2);
kfree(str);
return rc;
char *s = NULL, *t = NULL, *n = NULL;
u32 slen, tlen, nlen;
- if (context_struct_to_string(scontext, &s, &slen) < 0)
+ if (context_struct_to_string(scontext, &s, &slen))
goto out;
- if (context_struct_to_string(tcontext, &t, &tlen) < 0)
+ if (context_struct_to_string(tcontext, &t, &tlen))
goto out;
- if (context_struct_to_string(newcontext, &n, &nlen) < 0)
+ if (context_struct_to_string(newcontext, &n, &nlen))
goto out;
audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"security_compute_sid: invalid context %s"
{
struct sidtab *s = arg;
- return sidtab_insert(s, sid, context);
+ if (sid > SECINITSID_NUM)
+ return sidtab_insert(s, sid, context);
+ else
+ return 0;
}
static inline int convert_context_handle_invalid_context(struct context *context)
{
- int rc = 0;
+ char *s;
+ u32 len;
- if (selinux_enforcing) {
- rc = -EINVAL;
- } else {
- char *s;
- u32 len;
-
- if (!context_struct_to_string(context, &s, &len)) {
- printk(KERN_WARNING
- "SELinux: Context %s would be invalid if enforcing\n",
- s);
- kfree(s);
- }
+ if (selinux_enforcing)
+ return -EINVAL;
+
+ if (!context_struct_to_string(context, &s, &len)) {
+ printk(KERN_WARNING "SELinux: Context %s would be invalid if enforcing\n", s);
+ kfree(s);
}
- return rc;
+ return 0;
}
struct convert_context_args {
{
struct convert_context_args *args;
struct context oldc;
+ struct ocontext *oc;
+ struct mls_range *range;
struct role_datum *role;
struct type_datum *typdatum;
struct user_datum *usrdatum;
char *s;
u32 len;
- int rc;
+ int rc = 0;
+
+ if (key <= SECINITSID_NUM)
+ goto out;
args = p;
if (c->str) {
struct context ctx;
+
+ rc = -ENOMEM;
s = kstrdup(c->str, GFP_KERNEL);
- if (!s) {
- rc = -ENOMEM;
+ if (!s)
goto out;
- }
+
rc = string_to_context_struct(args->newp, NULL, s,
c->len, &ctx, SECSID_NULL);
kfree(s);
if (!rc) {
- printk(KERN_INFO
- "SELinux: Context %s became valid (mapped).\n",
+ printk(KERN_INFO "SELinux: Context %s became valid (mapped).\n",
c->str);
/* Replace string with mapped representation. */
kfree(c->str);
goto out;
} else {
/* Other error condition, e.g. ENOMEM. */
- printk(KERN_ERR
- "SELinux: Unable to map context %s, rc = %d.\n",
+ printk(KERN_ERR "SELinux: Unable to map context %s, rc = %d.\n",
c->str, -rc);
goto out;
}
if (rc)
goto out;
- rc = -EINVAL;
-
/* Convert the user. */
+ rc = -EINVAL;
usrdatum = hashtab_search(args->newp->p_users.table,
args->oldp->p_user_val_to_name[c->user - 1]);
if (!usrdatum)
c->user = usrdatum->value;
/* Convert the role. */
+ rc = -EINVAL;
role = hashtab_search(args->newp->p_roles.table,
args->oldp->p_role_val_to_name[c->role - 1]);
if (!role)
c->role = role->value;
/* Convert the type. */
+ rc = -EINVAL;
typdatum = hashtab_search(args->newp->p_types.table,
args->oldp->p_type_val_to_name[c->type - 1]);
if (!typdatum)
goto bad;
c->type = typdatum->value;
- rc = mls_convert_context(args->oldp, args->newp, c);
- if (rc)
- goto bad;
+ /* Convert the MLS fields if dealing with MLS policies */
+ if (args->oldp->mls_enabled && args->newp->mls_enabled) {
+ rc = mls_convert_context(args->oldp, args->newp, c);
+ if (rc)
+ goto bad;
+ } else if (args->oldp->mls_enabled && !args->newp->mls_enabled) {
+ /*
+ * Switching between MLS and non-MLS policy:
+ * free any storage used by the MLS fields in the
+ * context for all existing entries in the sidtab.
+ */
+ mls_context_destroy(c);
+ } else if (!args->oldp->mls_enabled && args->newp->mls_enabled) {
+ /*
+ * Switching between non-MLS and MLS policy:
+ * ensure that the MLS fields of the context for all
+ * existing entries in the sidtab are filled in with a
+ * suitable default value, likely taken from one of the
+ * initial SIDs.
+ */
+ oc = args->newp->ocontexts[OCON_ISID];
+ while (oc && oc->sid[0] != SECINITSID_UNLABELED)
+ oc = oc->next;
+ rc = -EINVAL;
+ if (!oc) {
+ printk(KERN_ERR "SELinux: unable to look up"
+ " the initial SIDs list\n");
+ goto bad;
+ }
+ range = &oc->context[0].range;
+ rc = mls_range_set(c, range);
+ if (rc)
+ goto bad;
+ }
/* Check the validity of the new context. */
if (!policydb_context_isvalid(args->newp, c)) {
}
context_destroy(&oldc);
+
rc = 0;
out:
return rc;
bad:
/* Map old representation to string and save it. */
- if (context_struct_to_string(&oldc, &s, &len))
- return -ENOMEM;
+ rc = context_struct_to_string(&oldc, &s, &len);
+ if (rc)
+ return rc;
context_destroy(&oldc);
context_destroy(c);
c->str = s;
c->len = len;
- printk(KERN_INFO
- "SELinux: Context %s became invalid (unmapped).\n",
+ printk(KERN_INFO "SELinux: Context %s became invalid (unmapped).\n",
c->str);
rc = 0;
goto out;
if (!ss_initialized) {
avtab_cache_init();
- if (policydb_read(&policydb, fp)) {
+ rc = policydb_read(&policydb, fp);
+ if (rc) {
avtab_cache_destroy();
- return -EINVAL;
+ return rc;
}
- if (selinux_set_mapping(&policydb, secclass_map,
- ¤t_mapping,
- ¤t_mapping_size)) {
+
+ policydb.len = len;
+ rc = selinux_set_mapping(&policydb, secclass_map,
+ ¤t_mapping,
+ ¤t_mapping_size);
+ if (rc) {
policydb_destroy(&policydb);
avtab_cache_destroy();
- return -EINVAL;
+ return rc;
}
- if (policydb_load_isids(&policydb, &sidtab)) {
+
+ rc = policydb_load_isids(&policydb, &sidtab);
+ if (rc) {
policydb_destroy(&policydb);
avtab_cache_destroy();
- return -EINVAL;
+ return rc;
}
+
security_load_policycaps();
ss_initialized = 1;
seqno = ++latest_granting;
selinux_complete_init();
avc_ss_reset(seqno);
selnl_notify_policyload(seqno);
+ selinux_status_update_policyload(seqno);
selinux_netlbl_cache_invalidate();
selinux_xfrm_notify_policyload();
return 0;
sidtab_hash_eval(&sidtab, "sids");
#endif
- if (policydb_read(&newpolicydb, fp))
- return -EINVAL;
+ rc = policydb_read(&newpolicydb, fp);
+ if (rc)
+ return rc;
- if (sidtab_init(&newsidtab)) {
+ newpolicydb.len = len;
+ /* If switching between different policy types, log MLS status */
+ if (policydb.mls_enabled && !newpolicydb.mls_enabled)
+ printk(KERN_INFO "SELinux: Disabling MLS support...\n");
+ else if (!policydb.mls_enabled && newpolicydb.mls_enabled)
+ printk(KERN_INFO "SELinux: Enabling MLS support...\n");
+
+ rc = policydb_load_isids(&newpolicydb, &newsidtab);
+ if (rc) {
+ printk(KERN_ERR "SELinux: unable to load the initial SIDs\n");
policydb_destroy(&newpolicydb);
- return -ENOMEM;
+ return rc;
}
- if (selinux_set_mapping(&newpolicydb, secclass_map,
- &map, &map_size))
+ rc = selinux_set_mapping(&newpolicydb, secclass_map, &map, &map_size);
+ if (rc)
goto err;
rc = security_preserve_bools(&newpolicydb);
/* Clone the SID table. */
sidtab_shutdown(&sidtab);
- if (sidtab_map(&sidtab, clone_sid, &newsidtab)) {
- rc = -ENOMEM;
+
+ rc = sidtab_map(&sidtab, clone_sid, &newsidtab);
+ if (rc)
goto err;
- }
/*
* Convert the internal representations of contexts
args.oldp = &policydb;
args.newp = &newpolicydb;
rc = sidtab_map(&newsidtab, convert_context, &args);
- if (rc)
+ if (rc) {
+ printk(KERN_ERR "SELinux: unable to convert the internal"
+ " representation of contexts in the new SID"
+ " table\n");
goto err;
+ }
/* Save the old policydb and SID table to free later. */
memcpy(&oldpolicydb, &policydb, sizeof policydb);
avc_ss_reset(seqno);
selnl_notify_policyload(seqno);
+ selinux_status_update_policyload(seqno);
selinux_netlbl_cache_invalidate();
selinux_xfrm_notify_policyload();
}
+size_t security_policydb_len(void)
+{
+ size_t len;
+
+ read_lock(&policy_rwlock);
+ len = policydb.len;
+ read_unlock(&policy_rwlock);
+
+ return len;
+}
+
/**
* security_port_sid - Obtain the SID for a port.
* @protocol: protocol number
u32 addrlen,
u32 *out_sid)
{
- int rc = 0;
+ int rc;
struct ocontext *c;
read_lock(&policy_rwlock);
case AF_INET: {
u32 addr;
- if (addrlen != sizeof(u32)) {
- rc = -EINVAL;
+ rc = -EINVAL;
+ if (addrlen != sizeof(u32))
goto out;
- }
addr = *((u32 *)addrp);
}
case AF_INET6:
- if (addrlen != sizeof(u64) * 2) {
- rc = -EINVAL;
+ rc = -EINVAL;
+ if (addrlen != sizeof(u64) * 2)
goto out;
- }
c = policydb.ocontexts[OCON_NODE6];
while (c) {
if (match_ipv6_addrmask(addrp, c->u.node6.addr,
break;
default:
+ rc = 0;
*out_sid = SECINITSID_NODE;
goto out;
}
*out_sid = SECINITSID_NODE;
}
+ rc = 0;
out:
read_unlock(&policy_rwlock);
return rc;
context_init(&usercon);
+ rc = -EINVAL;
fromcon = sidtab_search(&sidtab, fromsid);
- if (!fromcon) {
- rc = -EINVAL;
+ if (!fromcon)
goto out_unlock;
- }
+ rc = -EINVAL;
user = hashtab_search(policydb.p_users.table, username);
- if (!user) {
- rc = -EINVAL;
+ if (!user)
goto out_unlock;
- }
+
usercon.user = user->value;
+ rc = -ENOMEM;
mysids = kcalloc(maxnel, sizeof(*mysids), GFP_ATOMIC);
- if (!mysids) {
- rc = -ENOMEM;
+ if (!mysids)
goto out_unlock;
- }
ebitmap_for_each_positive_bit(&user->roles, rnode, i) {
role = policydb.role_val_to_struct[i];
- usercon.role = i+1;
+ usercon.role = i + 1;
ebitmap_for_each_positive_bit(&role->types, tnode, j) {
- usercon.type = j+1;
+ usercon.type = j + 1;
if (mls_setup_user_range(fromcon, user, &usercon))
continue;
if (mynel < maxnel) {
mysids[mynel++] = sid;
} else {
+ rc = -ENOMEM;
maxnel += SIDS_NEL;
mysids2 = kcalloc(maxnel, sizeof(*mysids2), GFP_ATOMIC);
- if (!mysids2) {
- rc = -ENOMEM;
+ if (!mysids2)
goto out_unlock;
- }
memcpy(mysids2, mysids, mynel * sizeof(*mysids2));
kfree(mysids);
mysids = mysids2;
}
}
}
-
+ rc = 0;
out_unlock:
read_unlock(&policy_rwlock);
if (rc || !mynel) {
goto out;
}
+ rc = -ENOMEM;
mysids2 = kcalloc(mynel, sizeof(*mysids2), GFP_KERNEL);
if (!mysids2) {
- rc = -ENOMEM;
kfree(mysids);
goto out;
}
u16 sclass;
struct genfs *genfs;
struct ocontext *c;
- int rc = 0, cmp = 0;
+ int rc, cmp = 0;
while (path[0] == '/' && path[1] == '/')
path++;
read_lock(&policy_rwlock);
sclass = unmap_class(orig_sclass);
+ *sid = SECINITSID_UNLABELED;
for (genfs = policydb.genfs; genfs; genfs = genfs->next) {
cmp = strcmp(fstype, genfs->fstype);
break;
}
- if (!genfs || cmp) {
- *sid = SECINITSID_UNLABELED;
- rc = -ENOENT;
+ rc = -ENOENT;
+ if (!genfs || cmp)
goto out;
- }
for (c = genfs->head; c; c = c->next) {
len = strlen(c->u.name);
break;
}
- if (!c) {
- *sid = SECINITSID_UNLABELED;
- rc = -ENOENT;
+ rc = -ENOENT;
+ if (!c)
goto out;
- }
if (!c->sid[0]) {
- rc = sidtab_context_to_sid(&sidtab,
- &c->context[0],
- &c->sid[0]);
+ rc = sidtab_context_to_sid(&sidtab, &c->context[0], &c->sid[0]);
if (rc)
goto out;
}
*sid = c->sid[0];
+ rc = 0;
out:
read_unlock(&policy_rwlock);
return rc;
if (c) {
*behavior = c->v.behavior;
if (!c->sid[0]) {
- rc = sidtab_context_to_sid(&sidtab,
- &c->context[0],
+ rc = sidtab_context_to_sid(&sidtab, &c->context[0],
&c->sid[0]);
if (rc)
goto out;
int security_get_bools(int *len, char ***names, int **values)
{
- int i, rc = -ENOMEM;
+ int i, rc;
read_lock(&policy_rwlock);
*names = NULL;
*values = NULL;
+ rc = 0;
*len = policydb.p_bools.nprim;
- if (!*len) {
- rc = 0;
+ if (!*len)
goto out;
- }
- *names = kcalloc(*len, sizeof(char *), GFP_ATOMIC);
+ rc = -ENOMEM;
+ *names = kcalloc(*len, sizeof(char *), GFP_ATOMIC);
if (!*names)
goto err;
- *values = kcalloc(*len, sizeof(int), GFP_ATOMIC);
+ rc = -ENOMEM;
+ *values = kcalloc(*len, sizeof(int), GFP_ATOMIC);
if (!*values)
goto err;
for (i = 0; i < *len; i++) {
size_t name_len;
+
(*values)[i] = policydb.bool_val_to_struct[i]->state;
name_len = strlen(policydb.p_bool_val_to_name[i]) + 1;
- (*names)[i] = kmalloc(sizeof(char) * name_len, GFP_ATOMIC);
+
+ rc = -ENOMEM;
+ (*names)[i] = kmalloc(sizeof(char) * name_len, GFP_ATOMIC);
if (!(*names)[i])
goto err;
+
strncpy((*names)[i], policydb.p_bool_val_to_name[i], name_len);
(*names)[i][name_len - 1] = 0;
}
int security_set_bools(int len, int *values)
{
- int i, rc = 0;
+ int i, rc;
int lenp, seqno = 0;
struct cond_node *cur;
write_lock_irq(&policy_rwlock);
+ rc = -EFAULT;
lenp = policydb.p_bools.nprim;
- if (len != lenp) {
- rc = -EFAULT;
+ if (len != lenp)
goto out;
- }
for (i = 0; i < len; i++) {
if (!!values[i] != policydb.bool_val_to_struct[i]->state) {
}
seqno = ++latest_granting;
-
+ rc = 0;
out:
write_unlock_irq(&policy_rwlock);
if (!rc) {
avc_ss_reset(seqno);
selnl_notify_policyload(seqno);
+ selinux_status_update_policyload(seqno);
selinux_xfrm_notify_policyload();
}
return rc;
int security_get_bool_value(int bool)
{
- int rc = 0;
+ int rc;
int len;
read_lock(&policy_rwlock);
+ rc = -EFAULT;
len = policydb.p_bools.nprim;
- if (bool >= len) {
- rc = -EFAULT;
+ if (bool >= len)
goto out;
- }
rc = policydb.bool_val_to_struct[bool]->state;
out:
struct context newcon;
char *s;
u32 len;
- int rc = 0;
+ int rc;
- if (!ss_initialized || !selinux_mls_enabled) {
+ rc = 0;
+ if (!ss_initialized || !policydb.mls_enabled) {
*new_sid = sid;
goto out;
}
context_init(&newcon);
read_lock(&policy_rwlock);
+
+ rc = -EINVAL;
context1 = sidtab_search(&sidtab, sid);
if (!context1) {
printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n",
__func__, sid);
- rc = -EINVAL;
goto out_unlock;
}
+ rc = -EINVAL;
context2 = sidtab_search(&sidtab, mls_sid);
if (!context2) {
printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n",
__func__, mls_sid);
- rc = -EINVAL;
goto out_unlock;
}
/* Check the validity of the new context. */
if (!policydb_context_isvalid(&policydb, &newcon)) {
rc = convert_context_handle_invalid_context(&newcon);
- if (rc)
- goto bad;
+ if (rc) {
+ if (!context_struct_to_string(&newcon, &s, &len)) {
+ audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
+ "security_sid_mls_copy: invalid context %s", s);
+ kfree(s);
+ }
+ goto out_unlock;
+ }
}
rc = sidtab_context_to_sid(&sidtab, &newcon, new_sid);
- goto out_unlock;
-
-bad:
- if (!context_struct_to_string(&newcon, &s, &len)) {
- audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
- "security_sid_mls_copy: invalid context %s", s);
- kfree(s);
- }
-
out_unlock:
read_unlock(&policy_rwlock);
context_destroy(&newcon);
struct context *nlbl_ctx;
struct context *xfrm_ctx;
+ *peer_sid = SECSID_NULL;
+
/* handle the common (which also happens to be the set of easy) cases
* right away, these two if statements catch everything involving a
* single or absent peer SID/label */
/* we don't need to check ss_initialized here since the only way both
* nlbl_sid and xfrm_sid are not equal to SECSID_NULL would be if the
* security server was initialized and ss_initialized was true */
- if (!selinux_mls_enabled) {
- *peer_sid = SECSID_NULL;
+ if (!policydb.mls_enabled)
return 0;
- }
read_lock(&policy_rwlock);
+ rc = -EINVAL;
nlbl_ctx = sidtab_search(&sidtab, nlbl_sid);
if (!nlbl_ctx) {
printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n",
__func__, nlbl_sid);
- rc = -EINVAL;
- goto out_slowpath;
+ goto out;
}
+ rc = -EINVAL;
xfrm_ctx = sidtab_search(&sidtab, xfrm_sid);
if (!xfrm_ctx) {
printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n",
__func__, xfrm_sid);
- rc = -EINVAL;
- goto out_slowpath;
+ goto out;
}
rc = (mls_context_cmp(nlbl_ctx, xfrm_ctx) ? 0 : -EACCES);
+ if (rc)
+ goto out;
-out_slowpath:
+ /* at present NetLabel SIDs/labels really only carry MLS
+ * information so if the MLS portion of the NetLabel SID
+ * matches the MLS portion of the labeled XFRM SID/label
+ * then pass along the XFRM SID as it is the most
+ * expressive */
+ *peer_sid = xfrm_sid;
+out:
read_unlock(&policy_rwlock);
- if (rc == 0)
- /* at present NetLabel SIDs/labels really only carry MLS
- * information so if the MLS portion of the NetLabel SID
- * matches the MLS portion of the labeled XFRM SID/label
- * then pass along the XFRM SID as it is the most
- * expressive */
- *peer_sid = xfrm_sid;
- else
- *peer_sid = SECSID_NULL;
return rc;
}
int security_get_classes(char ***classes, int *nclasses)
{
- int rc = -ENOMEM;
+ int rc;
read_lock(&policy_rwlock);
+ rc = -ENOMEM;
*nclasses = policydb.p_classes.nprim;
*classes = kcalloc(*nclasses, sizeof(**classes), GFP_ATOMIC);
if (!*classes)
rc = hashtab_map(policydb.p_classes.table, get_classes_callback,
*classes);
- if (rc < 0) {
+ if (rc) {
int i;
for (i = 0; i < *nclasses; i++)
kfree((*classes)[i]);
int security_get_permissions(char *class, char ***perms, int *nperms)
{
- int rc = -ENOMEM, i;
+ int rc, i;
struct class_datum *match;
read_lock(&policy_rwlock);
+ rc = -EINVAL;
match = hashtab_search(policydb.p_classes.table, class);
if (!match) {
printk(KERN_ERR "SELinux: %s: unrecognized class %s\n",
__func__, class);
- rc = -EINVAL;
goto out;
}
+ rc = -ENOMEM;
*nperms = match->permissions.nprim;
*perms = kcalloc(*nperms, sizeof(**perms), GFP_ATOMIC);
if (!*perms)
if (match->comdatum) {
rc = hashtab_map(match->comdatum->permissions.table,
get_permissions_callback, *perms);
- if (rc < 0)
+ if (rc)
goto err;
}
rc = hashtab_map(match->permissions.table, get_permissions_callback,
*perms);
- if (rc < 0)
+ if (rc)
goto err;
out:
switch (field) {
case AUDIT_SUBJ_USER:
case AUDIT_OBJ_USER:
+ rc = -EINVAL;
userdatum = hashtab_search(policydb.p_users.table, rulestr);
if (!userdatum)
- rc = -EINVAL;
- else
- tmprule->au_ctxt.user = userdatum->value;
+ goto out;
+ tmprule->au_ctxt.user = userdatum->value;
break;
case AUDIT_SUBJ_ROLE:
case AUDIT_OBJ_ROLE:
+ rc = -EINVAL;
roledatum = hashtab_search(policydb.p_roles.table, rulestr);
if (!roledatum)
- rc = -EINVAL;
- else
- tmprule->au_ctxt.role = roledatum->value;
+ goto out;
+ tmprule->au_ctxt.role = roledatum->value;
break;
case AUDIT_SUBJ_TYPE:
case AUDIT_OBJ_TYPE:
+ rc = -EINVAL;
typedatum = hashtab_search(policydb.p_types.table, rulestr);
if (!typedatum)
- rc = -EINVAL;
- else
- tmprule->au_ctxt.type = typedatum->value;
+ goto out;
+ tmprule->au_ctxt.type = typedatum->value;
break;
case AUDIT_SUBJ_SEN:
case AUDIT_SUBJ_CLR:
case AUDIT_OBJ_LEV_LOW:
case AUDIT_OBJ_LEV_HIGH:
rc = mls_from_string(rulestr, &tmprule->au_ctxt, GFP_ATOMIC);
+ if (rc)
+ goto out;
break;
}
-
+ rc = 0;
+out:
read_unlock(&policy_rwlock);
if (rc) {
int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
u32 *sid)
{
- int rc = -EIDRM;
+ int rc;
struct context *ctx;
struct context ctx_new;
read_lock(&policy_rwlock);
- if (secattr->flags & NETLBL_SECATTR_CACHE) {
+ if (secattr->flags & NETLBL_SECATTR_CACHE)
*sid = *(u32 *)secattr->cache->data;
- rc = 0;
- } else if (secattr->flags & NETLBL_SECATTR_SECID) {
+ else if (secattr->flags & NETLBL_SECATTR_SECID)
*sid = secattr->attr.secid;
- rc = 0;
- } else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) {
+ else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) {
+ rc = -EIDRM;
ctx = sidtab_search(&sidtab, SECINITSID_NETMSG);
if (ctx == NULL)
- goto netlbl_secattr_to_sid_return;
+ goto out;
context_init(&ctx_new);
ctx_new.user = ctx->user;
ctx_new.type = ctx->type;
mls_import_netlbl_lvl(&ctx_new, secattr);
if (secattr->flags & NETLBL_SECATTR_MLS_CAT) {
- if (ebitmap_netlbl_import(&ctx_new.range.level[0].cat,
- secattr->attr.mls.cat) != 0)
- goto netlbl_secattr_to_sid_return;
+ rc = ebitmap_netlbl_import(&ctx_new.range.level[0].cat,
+ secattr->attr.mls.cat);
+ if (rc)
+ goto out;
memcpy(&ctx_new.range.level[1].cat,
&ctx_new.range.level[0].cat,
sizeof(ctx_new.range.level[0].cat));
}
- if (mls_context_isvalid(&policydb, &ctx_new) != 1)
- goto netlbl_secattr_to_sid_return_cleanup;
+ rc = -EIDRM;
+ if (!mls_context_isvalid(&policydb, &ctx_new))
+ goto out_free;
rc = sidtab_context_to_sid(&sidtab, &ctx_new, sid);
- if (rc != 0)
- goto netlbl_secattr_to_sid_return_cleanup;
+ if (rc)
+ goto out_free;
security_netlbl_cache_add(secattr, *sid);
ebitmap_destroy(&ctx_new.range.level[0].cat);
- } else {
+ } else
*sid = SECSID_NULL;
- rc = 0;
- }
-netlbl_secattr_to_sid_return:
read_unlock(&policy_rwlock);
- return rc;
-netlbl_secattr_to_sid_return_cleanup:
+ return 0;
+out_free:
ebitmap_destroy(&ctx_new.range.level[0].cat);
- goto netlbl_secattr_to_sid_return;
+out:
+ read_unlock(&policy_rwlock);
+ return rc;
}
/**
return 0;
read_lock(&policy_rwlock);
+
+ rc = -ENOENT;
ctx = sidtab_search(&sidtab, sid);
- if (ctx == NULL) {
- rc = -ENOENT;
- goto netlbl_sid_to_secattr_failure;
- }
+ if (ctx == NULL)
+ goto out;
+
+ rc = -ENOMEM;
secattr->domain = kstrdup(policydb.p_type_val_to_name[ctx->type - 1],
GFP_ATOMIC);
- if (secattr->domain == NULL) {
- rc = -ENOMEM;
- goto netlbl_sid_to_secattr_failure;
- }
+ if (secattr->domain == NULL)
+ goto out;
+
secattr->attr.secid = sid;
secattr->flags |= NETLBL_SECATTR_DOMAIN_CPY | NETLBL_SECATTR_SECID;
mls_export_netlbl_lvl(ctx, secattr);
rc = mls_export_netlbl_cat(ctx, secattr);
- if (rc != 0)
- goto netlbl_sid_to_secattr_failure;
+out:
read_unlock(&policy_rwlock);
+ return rc;
+}
+#endif /* CONFIG_NETLABEL */
- return 0;
+/**
+ * security_read_policy - read the policy.
+ * @data: binary policy data
+ * @len: length of data in bytes
+ *
+ */
+int security_read_policy(void **data, ssize_t *len)
+{
+ int rc;
+ struct policy_file fp;
-netlbl_sid_to_secattr_failure:
+ if (!ss_initialized)
+ return -EINVAL;
+
+ *len = security_policydb_len();
+
+ *data = vmalloc_user(*len);
+ if (!*data)
+ return -ENOMEM;
+
+ fp.data = *data;
+ fp.len = *len;
+
+ read_lock(&policy_rwlock);
+ rc = policydb_write(&policydb, &fp);
read_unlock(&policy_rwlock);
- return rc;
+
+ if (rc)
+ return rc;
+
+ *len = (unsigned long)fp.data - (unsigned long)*data;
+ return 0;
+
}
-#endif /* CONFIG_NETLABEL */
projects / linux-flexiantxendom0-natty.git / blobdiff