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Diffstat (limited to 'security/selinux/ss/avtab.c')
-rw-r--r--security/selinux/ss/avtab.c105
1 files changed, 51 insertions, 54 deletions
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index 697eb4352439..2ad98732d052 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -1,20 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Implementation of the access vector table type.
*
* Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
*/
-/* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
- *
- * Added conditional policy language extensions
- *
- * Copyright (C) 2003 Tresys Technology, LLC
- * 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.
+/* Updated: Frank Mayer <mayerf@tresys.com> and
+ * Karl MacMillan <kmacmillan@tresys.com>
+ * Added conditional policy language extensions
+ * Copyright (C) 2003 Tresys Technology, LLC
*
* Updated: Yuichi Nakamura <ynakam@hitachisoft.jp>
- * Tuned number of hash slots for avtab to reduce memory usage
+ * Tuned number of hash slots for avtab to reduce memory usage
*/
#include <linux/bitops.h>
@@ -36,19 +33,20 @@ static inline u32 avtab_hash(const struct avtab_key *keyp, u32 mask)
static const u32 c2 = 0x1b873593;
static const u32 r1 = 15;
static const u32 r2 = 13;
- static const u32 m = 5;
- static const u32 n = 0xe6546b64;
+ static const u32 m = 5;
+ static const u32 n = 0xe6546b64;
u32 hash = 0;
-#define mix(input) do { \
- u32 v = input; \
- v *= c1; \
- v = (v << r1) | (v >> (32 - r1)); \
- v *= c2; \
- hash ^= v; \
+#define mix(input) \
+ do { \
+ u32 v = input; \
+ v *= c1; \
+ v = (v << r1) | (v >> (32 - r1)); \
+ v *= c2; \
+ hash ^= v; \
hash = (hash << r2) | (hash >> (32 - r2)); \
- hash = hash * m + n; \
+ hash = hash * m + n; \
} while (0)
mix(keyp->target_class);
@@ -66,9 +64,10 @@ static inline u32 avtab_hash(const struct avtab_key *keyp, u32 mask)
return hash & mask;
}
-static struct avtab_node*
-avtab_insert_node(struct avtab *h, struct avtab_node **dst,
- const struct avtab_key *key, const struct avtab_datum *datum)
+static struct avtab_node *avtab_insert_node(struct avtab *h,
+ struct avtab_node **dst,
+ const struct avtab_key *key,
+ const struct avtab_datum *datum)
{
struct avtab_node *newnode;
struct avtab_extended_perms *xperms;
@@ -99,7 +98,7 @@ avtab_insert_node(struct avtab *h, struct avtab_node **dst,
static int avtab_node_cmp(const struct avtab_key *key1,
const struct avtab_key *key2)
{
- u16 specified = key1->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
+ u16 specified = key1->specified & ~(AVTAB_ENABLED | AVTAB_ENABLED_OLD);
if (key1->source_type == key2->source_type &&
key1->target_type == key2->target_type &&
@@ -129,8 +128,7 @@ static int avtab_insert(struct avtab *h, const struct avtab_key *key,
return -EINVAL;
hvalue = avtab_hash(key, h->mask);
- for (prev = NULL, cur = h->htable[hvalue];
- cur;
+ for (prev = NULL, cur = h->htable[hvalue]; cur;
prev = cur, cur = cur->next) {
cmp = avtab_node_cmp(key, &cur->key);
/* extended perms may not be unique */
@@ -163,8 +161,7 @@ struct avtab_node *avtab_insert_nonunique(struct avtab *h,
if (!h || !h->nslot || h->nel == U32_MAX)
return NULL;
hvalue = avtab_hash(key, h->mask);
- for (prev = NULL, cur = h->htable[hvalue];
- cur;
+ for (prev = NULL, cur = h->htable[hvalue]; cur;
prev = cur, cur = cur->next) {
cmp = avtab_node_cmp(key, &cur->key);
if (cmp <= 0)
@@ -188,8 +185,7 @@ struct avtab_node *avtab_search_node(struct avtab *h,
return NULL;
hvalue = avtab_hash(key, h->mask);
- for (cur = h->htable[hvalue]; cur;
- cur = cur->next) {
+ for (cur = h->htable[hvalue]; cur; cur = cur->next) {
cmp = avtab_node_cmp(key, &cur->key);
if (cmp == 0)
return cur;
@@ -199,8 +195,8 @@ struct avtab_node *avtab_search_node(struct avtab *h,
return NULL;
}
-struct avtab_node*
-avtab_search_node_next(struct avtab_node *node, u16 specified)
+struct avtab_node *avtab_search_node_next(struct avtab_node *node,
+ u16 specified)
{
struct avtab_key tmp_key;
struct avtab_node *cur;
@@ -314,17 +310,19 @@ void avtab_hash_eval(struct avtab *h, const char *tag)
if (chain_len > max_chain_len)
max_chain_len = chain_len;
- chain2_len_sum += (unsigned long long)chain_len * chain_len;
+ chain2_len_sum +=
+ (unsigned long long)chain_len * chain_len;
}
}
pr_debug("SELinux: %s: %d entries and %d/%d buckets used, "
- "longest chain length %d, sum of chain length^2 %llu\n",
- tag, h->nel, slots_used, h->nslot, max_chain_len,
- chain2_len_sum);
+ "longest chain length %d, sum of chain length^2 %llu\n",
+ tag, h->nel, slots_used, h->nslot, max_chain_len,
+ chain2_len_sum);
}
#endif /* CONFIG_SECURITY_SELINUX_DEBUG */
+/* clang-format off */
static const uint16_t spec_order[] = {
AVTAB_ALLOWED,
AVTAB_AUDITDENY,
@@ -336,6 +334,7 @@ static const uint16_t spec_order[] = {
AVTAB_XPERMS_AUDITALLOW,
AVTAB_XPERMS_DONTAUDIT
};
+/* clang-format on */
int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
int (*insertf)(struct avtab *a, const struct avtab_key *k,
@@ -365,9 +364,8 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
if (items2 > ARRAY_SIZE(buf32)) {
pr_err("SELinux: avtab: entry overflow\n");
return -EINVAL;
-
}
- rc = next_entry(buf32, fp, sizeof(u32)*items2);
+ rc = next_entry(buf32, fp, sizeof(u32) * items2);
if (rc) {
pr_err("SELinux: avtab: truncated entry\n");
return rc;
@@ -400,8 +398,7 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
pr_err("SELinux: avtab: null entry\n");
return -EINVAL;
}
- if ((val & AVTAB_AV) &&
- (val & AVTAB_TYPE)) {
+ if ((val & AVTAB_AV) && (val & AVTAB_TYPE)) {
pr_err("SELinux: avtab: entry has both access vectors and types\n");
return -EINVAL;
}
@@ -428,7 +425,7 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
return 0;
}
- rc = next_entry(buf16, fp, sizeof(u16)*4);
+ rc = next_entry(buf16, fp, sizeof(u16) * 4);
if (rc) {
pr_err("SELinux: avtab: truncated entry\n");
return rc;
@@ -454,10 +451,11 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
}
if ((vers < POLICYDB_VERSION_XPERMS_IOCTL) &&
- (key.specified & AVTAB_XPERMS)) {
+ (key.specified & AVTAB_XPERMS)) {
pr_err("SELinux: avtab: policy version %u does not "
- "support extended permissions rules and one "
- "was specified\n", vers);
+ "support extended permissions rules and one "
+ "was specified\n",
+ vers);
return -EINVAL;
} else if (key.specified & AVTAB_XPERMS) {
memset(&xperms, 0, sizeof(struct avtab_extended_perms));
@@ -471,7 +469,8 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
pr_err("SELinux: avtab: truncated entry\n");
return rc;
}
- rc = next_entry(buf32, fp, sizeof(u32)*ARRAY_SIZE(xperms.perms.p));
+ rc = next_entry(buf32, fp,
+ sizeof(u32) * ARRAY_SIZE(xperms.perms.p));
if (rc) {
pr_err("SELinux: avtab: truncated entry\n");
return rc;
@@ -507,7 +506,6 @@ int avtab_read(struct avtab *a, void *fp, struct policydb *pol)
__le32 buf[1];
u32 nel, i;
-
rc = next_entry(buf, fp, sizeof(u32));
if (rc < 0) {
pr_err("SELinux: avtab: truncated table\n");
@@ -561,7 +559,8 @@ int avtab_write_item(struct policydb *p, const struct avtab_node *cur, void *fp)
return rc;
if (cur->key.specified & AVTAB_XPERMS) {
- rc = put_entry(&cur->datum.u.xperms->specified, sizeof(u8), 1, fp);
+ rc = put_entry(&cur->datum.u.xperms->specified, sizeof(u8), 1,
+ fp);
if (rc)
return rc;
rc = put_entry(&cur->datum.u.xperms->driver, sizeof(u8), 1, fp);
@@ -570,7 +569,7 @@ int avtab_write_item(struct policydb *p, const struct avtab_node *cur, void *fp)
for (i = 0; i < ARRAY_SIZE(cur->datum.u.xperms->perms.p); i++)
buf32[i] = cpu_to_le32(cur->datum.u.xperms->perms.p[i]);
rc = put_entry(buf32, sizeof(u32),
- ARRAY_SIZE(cur->datum.u.xperms->perms.p), fp);
+ ARRAY_SIZE(cur->datum.u.xperms->perms.p), fp);
} else {
buf32[0] = cpu_to_le32(cur->datum.u.data);
rc = put_entry(buf32, sizeof(u32), 1, fp);
@@ -593,8 +592,7 @@ int avtab_write(struct policydb *p, struct avtab *a, void *fp)
return rc;
for (i = 0; i < a->nslot; i++) {
- for (cur = a->htable[i]; cur;
- cur = cur->next) {
+ for (cur = a->htable[i]; cur; cur = cur->next) {
rc = avtab_write_item(p, cur, fp);
if (rc)
return rc;
@@ -606,10 +604,9 @@ int avtab_write(struct policydb *p, struct avtab *a, void *fp)
void __init avtab_cache_init(void)
{
- avtab_node_cachep = kmem_cache_create("avtab_node",
- sizeof(struct avtab_node),
- 0, SLAB_PANIC, NULL);
- avtab_xperms_cachep = kmem_cache_create("avtab_extended_perms",
- sizeof(struct avtab_extended_perms),
- 0, SLAB_PANIC, NULL);
+ avtab_node_cachep = kmem_cache_create(
+ "avtab_node", sizeof(struct avtab_node), 0, SLAB_PANIC, NULL);
+ avtab_xperms_cachep = kmem_cache_create(
+ "avtab_extended_perms", sizeof(struct avtab_extended_perms), 0,
+ SLAB_PANIC, NULL);
}
generated by cgit (git 2.34.1) at 2024-05-15 18:45:24 +0000