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-rw-r--r--security/Kconfig.hardening4
-rw-r--r--security/commoncap.c12
-rw-r--r--security/integrity/iint.c8
-rw-r--r--security/integrity/platform_certs/keyring_handler.c11
-rw-r--r--security/integrity/platform_certs/load_uefi.c20
-rw-r--r--security/keys/Kconfig3
-rw-r--r--security/keys/trusted-keys/Makefile6
-rw-r--r--security/keys/trusted-keys/tpm2key.asn111
-rw-r--r--security/keys/trusted-keys/trusted_core.c360
-rw-r--r--security/keys/trusted-keys/trusted_tee.c318
-rw-r--r--security/keys/trusted-keys/trusted_tpm1.c401
-rw-r--r--security/keys/trusted-keys/trusted_tpm2.c271
-rw-r--r--security/selinux/include/security.h15
-rw-r--r--security/selinux/selinuxfs.c22
-rw-r--r--security/selinux/ss/avtab.c101
-rw-r--r--security/selinux/ss/avtab.h2
-rw-r--r--security/selinux/ss/conditional.c12
-rw-r--r--security/selinux/ss/services.c220
-rw-r--r--security/selinux/ss/sidtab.c21
-rw-r--r--security/selinux/ss/sidtab.h4
-rw-r--r--security/tomoyo/network.c2
21 files changed, 1327 insertions, 497 deletions
diff --git a/security/Kconfig.hardening b/security/Kconfig.hardening
index 269967c4fc1b..a56c36470cb1 100644
--- a/security/Kconfig.hardening
+++ b/security/Kconfig.hardening
@@ -64,7 +64,7 @@ choice
config GCC_PLUGIN_STRUCTLEAK_BYREF
bool "zero-init structs passed by reference (strong)"
depends on GCC_PLUGINS
- depends on !(KASAN && KASAN_STACK=1)
+ depends on !(KASAN && KASAN_STACK)
select GCC_PLUGIN_STRUCTLEAK
help
Zero-initialize any structures on the stack that may
@@ -82,7 +82,7 @@ choice
config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
bool "zero-init anything passed by reference (very strong)"
depends on GCC_PLUGINS
- depends on !(KASAN && KASAN_STACK=1)
+ depends on !(KASAN && KASAN_STACK)
select GCC_PLUGIN_STRUCTLEAK
help
Zero-initialize any stack variables that may be passed
diff --git a/security/commoncap.c b/security/commoncap.c
index 28f4d25480df..1c519c875217 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -543,8 +543,7 @@ int cap_convert_nscap(struct user_namespace *mnt_userns, struct dentry *dentry,
__u32 magic, nsmagic;
struct inode *inode = d_backing_inode(dentry);
struct user_namespace *task_ns = current_user_ns(),
- *fs_ns = inode->i_sb->s_user_ns,
- *ancestor;
+ *fs_ns = inode->i_sb->s_user_ns;
kuid_t rootid;
size_t newsize;
@@ -567,15 +566,6 @@ int cap_convert_nscap(struct user_namespace *mnt_userns, struct dentry *dentry,
if (nsrootid == -1)
return -EINVAL;
- /*
- * Do not allow allow adding a v3 filesystem capability xattr
- * if the rootid field is ambiguous.
- */
- for (ancestor = task_ns->parent; ancestor; ancestor = ancestor->parent) {
- if (from_kuid(ancestor, rootid) == 0)
- return -EINVAL;
- }
-
newsize = sizeof(struct vfs_ns_cap_data);
nscap = kmalloc(newsize, GFP_ATOMIC);
if (!nscap)
diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index 1d20003243c3..0ba01847e836 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -98,6 +98,14 @@ struct integrity_iint_cache *integrity_inode_get(struct inode *inode)
struct rb_node *node, *parent = NULL;
struct integrity_iint_cache *iint, *test_iint;
+ /*
+ * The integrity's "iint_cache" is initialized at security_init(),
+ * unless it is not included in the ordered list of LSMs enabled
+ * on the boot command line.
+ */
+ if (!iint_cache)
+ panic("%s: lsm=integrity required.\n", __func__);
+
iint = integrity_iint_find(inode);
if (iint)
return iint;
diff --git a/security/integrity/platform_certs/keyring_handler.c b/security/integrity/platform_certs/keyring_handler.c
index c5ba695c10e3..5604bd57c990 100644
--- a/security/integrity/platform_certs/keyring_handler.c
+++ b/security/integrity/platform_certs/keyring_handler.c
@@ -56,6 +56,15 @@ static __init void uefi_blacklist_binary(const char *source,
}
/*
+ * Add an X509 cert to the revocation list.
+ */
+static __init void uefi_revocation_list_x509(const char *source,
+ const void *data, size_t len)
+{
+ add_key_to_revocation_list(data, len);
+}
+
+/*
* Return the appropriate handler for particular signature list types found in
* the UEFI db and MokListRT tables.
*/
@@ -76,5 +85,7 @@ __init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type)
return uefi_blacklist_x509_tbs;
if (efi_guidcmp(*sig_type, efi_cert_sha256_guid) == 0)
return uefi_blacklist_binary;
+ if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
+ return uefi_revocation_list_x509;
return 0;
}
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index ee4b4c666854..f290f78c3f30 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -132,8 +132,9 @@ static int __init load_moklist_certs(void)
static int __init load_uefi_certs(void)
{
efi_guid_t secure_var = EFI_IMAGE_SECURITY_DATABASE_GUID;
- void *db = NULL, *dbx = NULL;
- unsigned long dbsize = 0, dbxsize = 0;
+ efi_guid_t mok_var = EFI_SHIM_LOCK_GUID;
+ void *db = NULL, *dbx = NULL, *mokx = NULL;
+ unsigned long dbsize = 0, dbxsize = 0, mokxsize = 0;
efi_status_t status;
int rc = 0;
@@ -175,6 +176,21 @@ static int __init load_uefi_certs(void)
kfree(dbx);
}
+ mokx = get_cert_list(L"MokListXRT", &mok_var, &mokxsize, &status);
+ if (!mokx) {
+ if (status == EFI_NOT_FOUND)
+ pr_debug("mokx variable wasn't found\n");
+ else
+ pr_info("Couldn't get mokx list\n");
+ } else {
+ rc = parse_efi_signature_list("UEFI:MokListXRT",
+ mokx, mokxsize,
+ get_handler_for_dbx);
+ if (rc)
+ pr_err("Couldn't parse mokx signatures %d\n", rc);
+ kfree(mokx);
+ }
+
/* Load the MokListRT certs */
rc = load_moklist_certs();
diff --git a/security/keys/Kconfig b/security/keys/Kconfig
index c161642a8484..64b81abd087e 100644
--- a/security/keys/Kconfig
+++ b/security/keys/Kconfig
@@ -75,6 +75,9 @@ config TRUSTED_KEYS
select CRYPTO_HMAC
select CRYPTO_SHA1
select CRYPTO_HASH_INFO
+ select ASN1_ENCODER
+ select OID_REGISTRY
+ select ASN1
help
This option provides support for creating, sealing, and unsealing
keys in the kernel. Trusted keys are random number symmetric keys,
diff --git a/security/keys/trusted-keys/Makefile b/security/keys/trusted-keys/Makefile
index 7b73cebbb378..feb8b6c3cc79 100644
--- a/security/keys/trusted-keys/Makefile
+++ b/security/keys/trusted-keys/Makefile
@@ -4,5 +4,11 @@
#
obj-$(CONFIG_TRUSTED_KEYS) += trusted.o
+trusted-y += trusted_core.o
trusted-y += trusted_tpm1.o
+
+$(obj)/trusted_tpm2.o: $(obj)/tpm2key.asn1.h
trusted-y += trusted_tpm2.o
+trusted-y += tpm2key.asn1.o
+
+trusted-$(CONFIG_TEE) += trusted_tee.o
diff --git a/security/keys/trusted-keys/tpm2key.asn1 b/security/keys/trusted-keys/tpm2key.asn1
new file mode 100644
index 000000000000..f57f869ad600
--- /dev/null
+++ b/security/keys/trusted-keys/tpm2key.asn1
@@ -0,0 +1,11 @@
+---
+--- ASN.1 for TPM 2.0 keys
+---
+
+TPMKey ::= SEQUENCE {
+ type OBJECT IDENTIFIER ({tpm2_key_type}),
+ emptyAuth [0] EXPLICIT BOOLEAN OPTIONAL,
+ parent INTEGER ({tpm2_key_parent}),
+ pubkey OCTET STRING ({tpm2_key_pub}),
+ privkey OCTET STRING ({tpm2_key_priv})
+ }
diff --git a/security/keys/trusted-keys/trusted_core.c b/security/keys/trusted-keys/trusted_core.c
new file mode 100644
index 000000000000..d5c891d8d353
--- /dev/null
+++ b/security/keys/trusted-keys/trusted_core.c
@@ -0,0 +1,360 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2010 IBM Corporation
+ * Copyright (c) 2019-2021, Linaro Limited
+ *
+ * See Documentation/security/keys/trusted-encrypted.rst
+ */
+
+#include <keys/user-type.h>
+#include <keys/trusted-type.h>
+#include <keys/trusted_tee.h>
+#include <keys/trusted_tpm.h>
+#include <linux/capability.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/key-type.h>
+#include <linux/module.h>
+#include <linux/parser.h>
+#include <linux/rcupdate.h>
+#include <linux/slab.h>
+#include <linux/static_call.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+
+static char *trusted_key_source;
+module_param_named(source, trusted_key_source, charp, 0);
+MODULE_PARM_DESC(source, "Select trusted keys source (tpm or tee)");
+
+static const struct trusted_key_source trusted_key_sources[] = {
+#if defined(CONFIG_TCG_TPM)
+ { "tpm", &trusted_key_tpm_ops },
+#endif
+#if defined(CONFIG_TEE)
+ { "tee", &trusted_key_tee_ops },
+#endif
+};
+
+DEFINE_STATIC_CALL_NULL(trusted_key_init, *trusted_key_sources[0].ops->init);
+DEFINE_STATIC_CALL_NULL(trusted_key_seal, *trusted_key_sources[0].ops->seal);
+DEFINE_STATIC_CALL_NULL(trusted_key_unseal,
+ *trusted_key_sources[0].ops->unseal);
+DEFINE_STATIC_CALL_NULL(trusted_key_get_random,
+ *trusted_key_sources[0].ops->get_random);
+DEFINE_STATIC_CALL_NULL(trusted_key_exit, *trusted_key_sources[0].ops->exit);
+static unsigned char migratable;
+
+enum {
+ Opt_err,
+ Opt_new, Opt_load, Opt_update,
+};
+
+static const match_table_t key_tokens = {
+ {Opt_new, "new"},
+ {Opt_load, "load"},
+ {Opt_update, "update"},
+ {Opt_err, NULL}
+};
+
+/*
+ * datablob_parse - parse the keyctl data and fill in the
+ * payload structure
+ *
+ * On success returns 0, otherwise -EINVAL.
+ */
+static int datablob_parse(char **datablob, struct trusted_key_payload *p)
+{
+ substring_t args[MAX_OPT_ARGS];
+ long keylen;
+ int ret = -EINVAL;
+ int key_cmd;
+ char *c;
+
+ /* main command */
+ c = strsep(datablob, " \t");
+ if (!c)
+ return -EINVAL;
+ key_cmd = match_token(c, key_tokens, args);
+ switch (key_cmd) {
+ case Opt_new:
+ /* first argument is key size */
+ c = strsep(datablob, " \t");
+ if (!c)
+ return -EINVAL;
+ ret = kstrtol(c, 10, &keylen);
+ if (ret < 0 || keylen < MIN_KEY_SIZE || keylen > MAX_KEY_SIZE)
+ return -EINVAL;
+ p->key_len = keylen;
+ ret = Opt_new;
+ break;
+ case Opt_load:
+ /* first argument is sealed blob */
+ c = strsep(datablob, " \t");
+ if (!c)
+ return -EINVAL;
+ p->blob_len = strlen(c) / 2;
+ if (p->blob_len > MAX_BLOB_SIZE)
+ return -EINVAL;
+ ret = hex2bin(p->blob, c, p->blob_len);
+ if (ret < 0)
+ return -EINVAL;
+ ret = Opt_load;
+ break;
+ case Opt_update:
+ ret = Opt_update;
+ break;
+ case Opt_err:
+ return -EINVAL;
+ }
+ return ret;
+}
+
+static struct trusted_key_payload *trusted_payload_alloc(struct key *key)
+{
+ struct trusted_key_payload *p = NULL;
+ int ret;
+
+ ret = key_payload_reserve(key, sizeof(*p));
+ if (ret < 0)
+ goto err;
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ goto err;
+
+ p->migratable = migratable;
+err:
+ return p;
+}
+
+/*
+ * trusted_instantiate - create a new trusted key
+ *
+ * Unseal an existing trusted blob or, for a new key, get a
+ * random key, then seal and create a trusted key-type key,
+ * adding it to the specified keyring.
+ *
+ * On success, return 0. Otherwise return errno.
+ */
+static int trusted_instantiate(struct key *key,
+ struct key_preparsed_payload *prep)
+{
+ struct trusted_key_payload *payload = NULL;
+ size_t datalen = prep->datalen;
+ char *datablob, *orig_datablob;
+ int ret = 0;
+ int key_cmd;
+ size_t key_len;
+
+ if (datalen <= 0 || datalen > 32767 || !prep->data)
+ return -EINVAL;
+
+ orig_datablob = datablob = kmalloc(datalen + 1, GFP_KERNEL);
+ if (!datablob)
+ return -ENOMEM;
+ memcpy(datablob, prep->data, datalen);
+ datablob[datalen] = '\0';
+
+ payload = trusted_payload_alloc(key);
+ if (!payload) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ key_cmd = datablob_parse(&datablob, payload);
+ if (key_cmd < 0) {
+ ret = key_cmd;
+ goto out;
+ }
+
+ dump_payload(payload);
+
+ switch (key_cmd) {
+ case Opt_load:
+ ret = static_call(trusted_key_unseal)(payload, datablob);
+ dump_payload(payload);
+ if (ret < 0)
+ pr_info("key_unseal failed (%d)\n", ret);
+ break;
+ case Opt_new:
+ key_len = payload->key_len;
+ ret = static_call(trusted_key_get_random)(payload->key,
+ key_len);
+ if (ret < 0)
+ goto out;
+
+ if (ret != key_len) {
+ pr_info("key_create failed (%d)\n", ret);
+ ret = -EIO;
+ goto out;
+ }
+
+ ret = static_call(trusted_key_seal)(payload, datablob);
+ if (ret < 0)
+ pr_info("key_seal failed (%d)\n", ret);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+out:
+ kfree_sensitive(orig_datablob);
+ if (!ret)
+ rcu_assign_keypointer(key, payload);
+ else
+ kfree_sensitive(payload);
+ return ret;
+}
+
+static void trusted_rcu_free(struct rcu_head *rcu)
+{
+ struct trusted_key_payload *p;
+
+ p = container_of(rcu, struct trusted_key_payload, rcu);
+ kfree_sensitive(p);
+}
+
+/*
+ * trusted_update - reseal an existing key with new PCR values
+ */
+static int trusted_update(struct key *key, struct key_preparsed_payload *prep)
+{
+ struct trusted_key_payload *p;
+ struct trusted_key_payload *new_p;
+ size_t datalen = prep->datalen;
+ char *datablob, *orig_datablob;
+ int ret = 0;
+
+ if (key_is_negative(key))
+ return -ENOKEY;
+ p = key->payload.data[0];
+ if (!p->migratable)
+ return -EPERM;
+ if (datalen <= 0 || datalen > 32767 || !prep->data)
+ return -EINVAL;
+
+ orig_datablob = datablob = kmalloc(datalen + 1, GFP_KERNEL);
+ if (!datablob)
+ return -ENOMEM;
+
+ new_p = trusted_payload_alloc(key);
+ if (!new_p) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ memcpy(datablob, prep->data, datalen);
+ datablob[datalen] = '\0';
+ ret = datablob_parse(&datablob, new_p);
+ if (ret != Opt_update) {
+ ret = -EINVAL;
+ kfree_sensitive(new_p);
+ goto out;
+ }
+
+ /* copy old key values, and reseal with new pcrs */
+ new_p->migratable = p->migratable;
+ new_p->key_len = p->key_len;
+ memcpy(new_p->key, p->key, p->key_len);
+ dump_payload(p);
+ dump_payload(new_p);
+
+ ret = static_call(trusted_key_seal)(new_p, datablob);
+ if (ret < 0) {
+ pr_info("key_seal failed (%d)\n", ret);
+ kfree_sensitive(new_p);
+ goto out;
+ }
+
+ rcu_assign_keypointer(key, new_p);
+ call_rcu(&p->rcu, trusted_rcu_free);
+out:
+ kfree_sensitive(orig_datablob);
+ return ret;
+}
+
+/*
+ * trusted_read - copy the sealed blob data to userspace in hex.
+ * On success, return to userspace the trusted key datablob size.
+ */
+static long trusted_read(const struct key *key, char *buffer,
+ size_t buflen)
+{
+ const struct trusted_key_payload *p;
+ char *bufp;
+ int i;
+
+ p = dereference_key_locked(key);
+ if (!p)
+ return -EINVAL;
+
+ if (buffer && buflen >= 2 * p->blob_len) {
+ bufp = buffer;
+ for (i = 0; i < p->blob_len; i++)
+ bufp = hex_byte_pack(bufp, p->blob[i]);
+ }
+ return 2 * p->blob_len;
+}
+
+/*
+ * trusted_destroy - clear and free the key's payload
+ */
+static void trusted_destroy(struct key *key)
+{
+ kfree_sensitive(key->payload.data[0]);
+}
+
+struct key_type key_type_trusted = {
+ .name = "trusted",
+ .instantiate = trusted_instantiate,
+ .update = trusted_update,
+ .destroy = trusted_destroy,
+ .describe = user_describe,
+ .read = trusted_read,
+};
+EXPORT_SYMBOL_GPL(key_type_trusted);
+
+static int __init init_trusted(void)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(trusted_key_sources); i++) {
+ if (trusted_key_source &&
+ strncmp(trusted_key_source, trusted_key_sources[i].name,
+ strlen(trusted_key_sources[i].name)))
+ continue;
+
+ static_call_update(trusted_key_init,
+ trusted_key_sources[i].ops->init);
+ static_call_update(trusted_key_seal,
+ trusted_key_sources[i].ops->seal);
+ static_call_update(trusted_key_unseal,
+ trusted_key_sources[i].ops->unseal);
+ static_call_update(trusted_key_get_random,
+ trusted_key_sources[i].ops->get_random);
+ static_call_update(trusted_key_exit,
+ trusted_key_sources[i].ops->exit);
+ migratable = trusted_key_sources[i].ops->migratable;
+
+ ret = static_call(trusted_key_init)();
+ if (!ret)
+ break;
+ }
+
+ /*
+ * encrypted_keys.ko depends on successful load of this module even if
+ * trusted key implementation is not found.
+ */
+ if (ret == -ENODEV)
+ return 0;
+
+ return ret;
+}
+
+static void __exit cleanup_trusted(void)
+{
+ static_call(trusted_key_exit)();
+}
+
+late_initcall(init_trusted);
+module_exit(cleanup_trusted);
+
+MODULE_LICENSE("GPL");
diff --git a/security/keys/trusted-keys/trusted_tee.c b/security/keys/trusted-keys/trusted_tee.c
new file mode 100644
index 000000000000..2ce66c199e1d
--- /dev/null
+++ b/security/keys/trusted-keys/trusted_tee.c
@@ -0,0 +1,318 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019-2021 Linaro Ltd.
+ *
+ * Author:
+ * Sumit Garg <sumit.garg@linaro.org>
+ */
+
+#include <linux/err.h>
+#include <linux/key-type.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/tee_drv.h>
+#include <linux/uuid.h>
+
+#include <keys/trusted_tee.h>
+
+#define DRIVER_NAME "trusted-key-tee"
+
+/*
+ * Get random data for symmetric key
+ *
+ * [out] memref[0] Random data
+ */
+#define TA_CMD_GET_RANDOM 0x0
+
+/*
+ * Seal trusted key using hardware unique key
+ *
+ * [in] memref[0] Plain key
+ * [out] memref[1] Sealed key datablob
+ */
+#define TA_CMD_SEAL 0x1
+
+/*
+ * Unseal trusted key using hardware unique key
+ *
+ * [in] memref[0] Sealed key datablob
+ * [out] memref[1] Plain key
+ */
+#define TA_CMD_UNSEAL 0x2
+
+/**
+ * struct trusted_key_tee_private - TEE Trusted key private data
+ * @dev: TEE based Trusted key device.
+ * @ctx: TEE context handler.
+ * @session_id: Trusted key TA session identifier.
+ * @shm_pool: Memory pool shared with TEE device.
+ */
+struct trusted_key_tee_private {
+ struct device *dev;
+ struct tee_context *ctx;
+ u32 session_id;
+ struct tee_shm *shm_pool;
+};
+
+static struct trusted_key_tee_private pvt_data;
+
+/*
+ * Have the TEE seal(encrypt) the symmetric key
+ */
+static int trusted_tee_seal(struct trusted_key_payload *p, char *datablob)
+{
+ int ret;
+ struct tee_ioctl_invoke_arg inv_arg;
+ struct tee_param param[4];
+ struct tee_shm *reg_shm_in = NULL, *reg_shm_out = NULL;
+
+ memset(&inv_arg, 0, sizeof(inv_arg));
+ memset(&param, 0, sizeof(param));
+
+ reg_shm_in = tee_shm_register(pvt_data.ctx, (unsigned long)p->key,
+ p->key_len, TEE_SHM_DMA_BUF |
+ TEE_SHM_KERNEL_MAPPED);
+ if (IS_ERR(reg_shm_in)) {
+ dev_err(pvt_data.dev, "key shm register failed\n");
+ return PTR_ERR(reg_shm_in);
+ }
+
+ reg_shm_out = tee_shm_register(pvt_data.ctx, (unsigned long)p->blob,
+ sizeof(p->blob), TEE_SHM_DMA_BUF |
+ TEE_SHM_KERNEL_MAPPED);
+ if (IS_ERR(reg_shm_out)) {
+ dev_err(pvt_data.dev, "blob shm register failed\n");
+ ret = PTR_ERR(reg_shm_out);
+ goto out;
+ }
+
+ inv_arg.func = TA_CMD_SEAL;
+ inv_arg.session = pvt_data.session_id;
+ inv_arg.num_params = 4;
+
+ param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
+ param[0].u.memref.shm = reg_shm_in;
+ param[0].u.memref.size = p->key_len;
+ param[0].u.memref.shm_offs = 0;
+ param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
+ param[1].u.memref.shm = reg_shm_out;
+ param[1].u.memref.size = sizeof(p->blob);
+ param[1].u.memref.shm_offs = 0;
+
+ ret = tee_client_invoke_func(pvt_data.ctx, &inv_arg, param);
+ if ((ret < 0) || (inv_arg.ret != 0)) {
+ dev_err(pvt_data.dev, "TA_CMD_SEAL invoke err: %x\n",
+ inv_arg.ret);
+ ret = -EFAULT;
+ } else {
+ p->blob_len = param[1].u.memref.size;
+ }
+
+out:
+ if (reg_shm_out)
+ tee_shm_free(reg_shm_out);
+ if (reg_shm_in)
+ tee_shm_free(reg_shm_in);
+
+ return ret;
+}
+
+/*
+ * Have the TEE unseal(decrypt) the symmetric key
+ */
+static int trusted_tee_unseal(struct trusted_key_payload *p, char *datablob)
+{
+ int ret;
+ struct tee_ioctl_invoke_arg inv_arg;
+ struct tee_param param[4];
+ struct tee_shm *reg_shm_in = NULL, *reg_shm_out = NULL;
+
+ memset(&inv_arg, 0, sizeof(inv_arg));
+ memset(&param, 0, sizeof(param));
+
+ reg_shm_in = tee_shm_register(pvt_data.ctx, (unsigned long)p->blob,
+ p->blob_len, TEE_SHM_DMA_BUF |
+ TEE_SHM_KERNEL_MAPPED);
+ if (IS_ERR(reg_shm_in)) {
+ dev_err(pvt_data.dev, "blob shm register failed\n");
+ return PTR_ERR(reg_shm_in);
+ }
+
+ reg_shm_out = tee_shm_register(pvt_data.ctx, (unsigned long)p->key,
+ sizeof(p->key), TEE_SHM_DMA_BUF |
+ TEE_SHM_KERNEL_MAPPED);
+ if (IS_ERR(reg_shm_out)) {
+ dev_err(pvt_data.dev, "key shm register failed\n");
+ ret = PTR_ERR(reg_shm_out);
+ goto out;
+ }
+
+ inv_arg.func = TA_CMD_UNSEAL;
+ inv_arg.session = pvt_data.session_id;
+ inv_arg.num_params = 4;
+
+ param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
+ param[0].u.memref.shm = reg_shm_in;
+ param[0].u.memref.size = p->blob_len;
+ param[0].u.memref.shm_offs = 0;
+ param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
+ param[1].u.memref.shm = reg_shm_out;
+ param[1].u.memref.size = sizeof(p->key);
+ param[1].u.memref.shm_offs = 0;
+
+ ret = tee_client_invoke_func(pvt_data.ctx, &inv_arg, param);
+ if ((ret < 0) || (inv_arg.ret != 0)) {
+ dev_err(pvt_data.dev, "TA_CMD_UNSEAL invoke err: %x\n",
+ inv_arg.ret);
+ ret = -EFAULT;
+ } else {
+ p->key_len = param[1].u.memref.size;
+ }
+
+out:
+ if (reg_shm_out)
+ tee_shm_free(reg_shm_out);
+ if (reg_shm_in)
+ tee_shm_free(reg_shm_in);
+
+ return ret;
+}
+
+/*
+ * Have the TEE generate random symmetric key
+ */
+static int trusted_tee_get_random(unsigned char *key, size_t key_len)
+{
+ int ret;
+ struct tee_ioctl_invoke_arg inv_arg;
+ struct tee_param param[4];
+ struct tee_shm *reg_shm = NULL;
+
+ memset(&inv_arg, 0, sizeof(inv_arg));
+ memset(&param, 0, sizeof(param));
+
+ reg_shm = tee_shm_register(pvt_data.ctx, (unsigned long)key, key_len,
+ TEE_SHM_DMA_BUF | TEE_SHM_KERNEL_MAPPED);
+ if (IS_ERR(reg_shm)) {
+ dev_err(pvt_data.dev, "key shm register failed\n");
+ return PTR_ERR(reg_shm);
+ }
+
+ inv_arg.func = TA_CMD_GET_RANDOM;
+ inv_arg.session = pvt_data.session_id;
+ inv_arg.num_params = 4;
+
+ param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
+ param[0].u.memref.shm = reg_shm;
+ param[0].u.memref.size = key_len;
+ param[0].u.memref.shm_offs = 0;
+
+ ret = tee_client_invoke_func(pvt_data.ctx, &inv_arg, param);
+ if ((ret < 0) || (inv_arg.ret != 0)) {
+ dev_err(pvt_data.dev, "TA_CMD_GET_RANDOM invoke err: %x\n",
+ inv_arg.ret);
+ ret = -EFAULT;
+ } else {
+ ret = param[0].u.memref.size;
+ }
+
+ tee_shm_free(reg_shm);
+
+ return ret;
+}
+
+static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data)
+{
+ if (ver->impl_id == TEE_IMPL_ID_OPTEE)
+ return 1;
+ else
+ return 0;
+}
+
+static int trusted_key_probe(struct device *dev)
+{
+ struct tee_client_device *rng_device = to_tee_client_device(dev);
+ int ret;
+ struct tee_ioctl_open_session_arg sess_arg;
+
+ memset(&sess_arg, 0, sizeof(sess_arg));
+
+ pvt_data.ctx = tee_client_open_context(NULL, optee_ctx_match, NULL,
+ NULL);
+ if (IS_ERR(pvt_data.ctx))
+ return -ENODEV;
+
+ memcpy(sess_arg.uuid, rng_device->id.uuid.b, TEE_IOCTL_UUID_LEN);
+ sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL;
+ sess_arg.num_params = 0;
+
+ ret = tee_client_open_session(pvt_data.ctx, &sess_arg, NULL);
+ if ((ret < 0) || (sess_arg.ret != 0)) {
+ dev_err(dev, "tee_client_open_session failed, err: %x\n",
+ sess_arg.ret);
+ ret = -EINVAL;
+ goto out_ctx;
+ }
+ pvt_data.session_id = sess_arg.session;
+
+ ret = register_key_type(&key_type_trusted);
+ if (ret < 0)
+ goto out_sess;
+
+ pvt_data.dev = dev;
+
+ return 0;
+
+out_sess:
+ tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
+out_ctx:
+ tee_client_close_context(pvt_data.ctx);
+
+ return ret;
+}
+
+static int trusted_key_remove(struct device *dev)
+{
+ unregister_key_type(&key_type_trusted);
+ tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
+ tee_client_close_context(pvt_data.ctx);
+
+ return 0;
+}
+
+static const struct tee_client_device_id trusted_key_id_table[] = {
+ {UUID_INIT(0xf04a0fe7, 0x1f5d, 0x4b9b,
+ 0xab, 0xf7, 0x61, 0x9b, 0x85, 0xb4, 0xce, 0x8c)},
+ {}
+};
+MODULE_DEVICE_TABLE(tee, trusted_key_id_table);
+
+static struct tee_client_driver trusted_key_driver = {
+ .id_table = trusted_key_id_table,
+ .driver = {
+ .name = DRIVER_NAME,
+ .bus = &tee_bus_type,
+ .probe = trusted_key_probe,
+ .remove = trusted_key_remove,
+ },
+};
+
+static int trusted_tee_init(void)
+{
+ return driver_register(&trusted_key_driver.driver);
+}
+
+static void trusted_tee_exit(void)
+{
+ driver_unregister(&trusted_key_driver.driver);
+}
+
+struct trusted_key_ops trusted_key_tee_ops = {
+ .migratable = 0, /* non-migratable */
+ .init = trusted_tee_init,
+ .seal = trusted_tee_seal,
+ .unseal = trusted_tee_unseal,
+ .get_random = trusted_tee_get_random,
+ .exit = trusted_tee_exit,
+};
diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index 493eb91ed017..469394550801 100644
--- a/security/keys/trusted-keys/trusted_tpm1.c
+++ b/security/keys/trusted-keys/trusted_tpm1.c
@@ -1,29 +1,22 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2010 IBM Corporation
- *
- * Author:
- * David Safford <safford@us.ibm.com>
+ * Copyright (c) 2019-2021, Linaro Limited
*
* See Documentation/security/keys/trusted-encrypted.rst
*/
#include <crypto/hash_info.h>
-#include <linux/uaccess.h>
-#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/parser.h>
#include <linux/string.h>
#include <linux/err.h>
-#include <keys/user-type.h>
#include <keys/trusted-type.h>
#include <linux/key-type.h>
-#include <linux/rcupdate.h>
#include <linux/crypto.h>
#include <crypto/hash.h>
#include <crypto/sha1.h>
-#include <linux/capability.h>
#include <linux/tpm.h>
#include <linux/tpm_command.h>
@@ -63,7 +56,7 @@ static int TSS_sha1(const unsigned char *data, unsigned int datalen,
sdesc = init_sdesc(hashalg);
if (IS_ERR(sdesc)) {
- pr_info("trusted_key: can't alloc %s\n", hash_alg);
+ pr_info("can't alloc %s\n", hash_alg);
return PTR_ERR(sdesc);
}
@@ -83,7 +76,7 @@ static int TSS_rawhmac(unsigned char *digest, const unsigned char *key,
sdesc = init_sdesc(hmacalg);
if (IS_ERR(sdesc)) {
- pr_info("trusted_key: can't alloc %s\n", hmac_alg);
+ pr_info("can't alloc %s\n", hmac_alg);
return PTR_ERR(sdesc);
}
@@ -136,7 +129,7 @@ int TSS_authhmac(unsigned char *digest, const unsigned char *key,
sdesc = init_sdesc(hashalg);
if (IS_ERR(sdesc)) {
- pr_info("trusted_key: can't alloc %s\n", hash_alg);
+ pr_info("can't alloc %s\n", hash_alg);
return PTR_ERR(sdesc);
}
@@ -212,7 +205,7 @@ int TSS_checkhmac1(unsigned char *buffer,
sdesc = init_sdesc(hashalg);
if (IS_ERR(sdesc)) {
- pr_info("trusted_key: can't alloc %s\n", hash_alg);
+ pr_info("can't alloc %s\n", hash_alg);
return PTR_ERR(sdesc);
}
ret = crypto_shash_init(&sdesc->shash);
@@ -305,7 +298,7 @@ static int TSS_checkhmac2(unsigned char *buffer,
sdesc = init_sdesc(hashalg);
if (IS_ERR(sdesc)) {
- pr_info("trusted_key: can't alloc %s\n", hash_alg);
+ pr_info("can't alloc %s\n", hash_alg);
return PTR_ERR(sdesc);
}
ret = crypto_shash_init(&sdesc->shash);
@@ -597,12 +590,12 @@ static int tpm_unseal(struct tpm_buf *tb,
/* sessions for unsealing key and data */
ret = oiap(tb, &authhandle1, enonce1);
if (ret < 0) {
- pr_info("trusted_key: oiap failed (%d)\n", ret);
+ pr_info("oiap failed (%d)\n", ret);
return ret;
}
ret = oiap(tb, &authhandle2, enonce2);
if (ret < 0) {
- pr_info("trusted_key: oiap failed (%d)\n", ret);
+ pr_info("oiap failed (%d)\n", ret);
return ret;
}
@@ -612,7 +605,7 @@ static int tpm_unseal(struct tpm_buf *tb,
return ret;
if (ret != TPM_NONCE_SIZE) {
- pr_info("trusted_key: tpm_get_random failed (%d)\n", ret);
+ pr_info("tpm_get_random failed (%d)\n", ret);
return -EIO;
}
ret = TSS_authhmac(authdata1, keyauth, TPM_NONCE_SIZE,
@@ -641,7 +634,7 @@ static int tpm_unseal(struct tpm_buf *tb,
ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE);
if (ret < 0) {
- pr_info("trusted_key: authhmac failed (%d)\n", ret);
+ pr_info("authhmac failed (%d)\n", ret);
return ret;
}
@@ -653,7 +646,7 @@ static int tpm_unseal(struct tpm_buf *tb,
*datalen, TPM_DATA_OFFSET + sizeof(uint32_t), 0,
0);
if (ret < 0) {
- pr_info("trusted_key: TSS_checkhmac2 failed (%d)\n", ret);
+ pr_info("TSS_checkhmac2 failed (%d)\n", ret);
return ret;
}
memcpy(data, tb->data + TPM_DATA_OFFSET + sizeof(uint32_t), *datalen);
@@ -680,7 +673,7 @@ static int key_seal(struct trusted_key_payload *p,
p->key, p->key_len + 1, p->blob, &p->blob_len,
o->blobauth, o->pcrinfo, o->pcrinfo_len);
if (ret < 0)
- pr_info("trusted_key: srkseal failed (%d)\n", ret);
+ pr_info("srkseal failed (%d)\n", ret);
tpm_buf_destroy(&tb);
return ret;
@@ -702,7 +695,7 @@ static int key_unseal(struct trusted_key_payload *p,
ret = tpm_unseal(&tb, o->keyhandle, o->keyauth, p->blob, p->blob_len,
o->blobauth, p->key, &p->key_len);
if (ret < 0)
- pr_info("trusted_key: srkunseal failed (%d)\n", ret);
+ pr_info("srkunseal failed (%d)\n", ret);
else
/* pull migratable flag out of sealed key */
p->migratable = p->key[--p->key_len];
@@ -713,7 +706,6 @@ static int key_unseal(struct trusted_key_payload *p,
enum {
Opt_err,
- Opt_new, Opt_load, Opt_update,
Opt_keyhandle, Opt_keyauth, Opt_blobauth,
Opt_pcrinfo, Opt_pcrlock, Opt_migratable,
Opt_hash,
@@ -722,9 +714,6 @@ enum {
};
static const match_table_t key_tokens = {
- {Opt_new, "new"},
- {Opt_load, "load"},
- {Opt_update, "update"},
{Opt_keyhandle, "keyhandle=%s"},
{Opt_keyauth, "keyauth=%s"},
{Opt_blobauth, "blobauth=%s"},
@@ -758,6 +747,9 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
opt->hash = tpm2 ? HASH_ALGO_SHA256 : HASH_ALGO_SHA1;
+ if (!c)
+ return 0;
+
while ((p = strsep(&c, " \t"))) {
if (*p == '\0' || *p == ' ' || *p == '\t')
continue;
@@ -791,13 +783,33 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
return -EINVAL;
break;
case Opt_blobauth:
- if (strlen(args[0].from) != 2 * SHA1_DIGEST_SIZE)
- return -EINVAL;
- res = hex2bin(opt->blobauth, args[0].from,
- SHA1_DIGEST_SIZE);
- if (res < 0)
- return -EINVAL;
+ /*
+ * TPM 1.2 authorizations are sha1 hashes passed in as
+ * hex strings. TPM 2.0 authorizations are simple
+ * passwords (although it can take a hash as well)
+ */
+ opt->blobauth_len = strlen(args[0].from);
+
+ if (opt->blobauth_len == 2 * TPM_DIGEST_SIZE) {
+ res = hex2bin(opt->blobauth, args[0].from,
+ TPM_DIGEST_SIZE);
+ if (res < 0)
+ return -EINVAL;
+
+ opt->blobauth_len = TPM_DIGEST_SIZE;
+ break;
+ }
+
+ if (tpm2 && opt->blobauth_len <= sizeof(opt->blobauth)) {
+ memcpy(opt->blobauth, args[0].from,
+ opt->blobauth_len);
+ break;
+ }
+
+ return -EINVAL;
+
break;
+
case Opt_migratable:
if (*args[0].from == '0')
pay->migratable = 0;
@@ -822,7 +834,7 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
if (i == HASH_ALGO__LAST)
return -EINVAL;
if (!tpm2 && i != HASH_ALGO_SHA1) {
- pr_info("trusted_key: TPM 1.x only supports SHA-1.\n");
+ pr_info("TPM 1.x only supports SHA-1.\n");
return -EINVAL;
}
break;
@@ -851,71 +863,6 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
return 0;
}
-/*
- * datablob_parse - parse the keyctl data and fill in the
- * payload and options structures
- *
- * On success returns 0, otherwise -EINVAL.
- */
-static int datablob_parse(char *datablob, struct trusted_key_payload *p,
- struct trusted_key_options *o)
-{
- substring_t args[MAX_OPT_ARGS];
- long keylen;
- int ret = -EINVAL;
- int key_cmd;
- char *c;
-
- /* main command */
- c = strsep(&datablob, " \t");
- if (!c)
- return -EINVAL;
- key_cmd = match_token(c, key_tokens, args);
- switch (key_cmd) {
- case Opt_new:
- /* first argument is key size */
- c = strsep(&datablob, " \t");
- if (!c)
- return -EINVAL;
- ret = kstrtol(c, 10, &keylen);
- if (ret < 0 || keylen < MIN_KEY_SIZE || keylen > MAX_KEY_SIZE)
- return -EINVAL;
- p->key_len = keylen;
- ret = getoptions(datablob, p, o);
- if (ret < 0)
- return ret;
- ret = Opt_new;
- break;
- case Opt_load:
- /* first argument is sealed blob */
- c = strsep(&datablob, " \t");
- if (!c)
- return -EINVAL;
- p->blob_len = strlen(c) / 2;
- if (p->blob_len > MAX_BLOB_SIZE)
- return -EINVAL;
- ret = hex2bin(p->blob, c, p->blob_len);
- if (ret < 0)
- return -EINVAL;
- ret = getoptions(datablob, p, o);
- if (ret < 0)
- return ret;
- ret = Opt_load;
- break;
- case Opt_update:
- /* all arguments are options */
- ret = getoptions(datablob, p, o);
- if (ret < 0)
- return ret;
- ret = Opt_update;
- break;
- case Opt_err:
- return -EINVAL;
- break;
- }
- return ret;
-}
-
static struct trusted_key_options *trusted_options_alloc(void)
{
struct trusted_key_options *options;
@@ -936,252 +883,99 @@ static struct trusted_key_options *trusted_options_alloc(void)
return options;
}
-static struct trusted_key_payload *trusted_payload_alloc(struct key *key)
+static int trusted_tpm_seal(struct trusted_key_payload *p, char *datablob)
{
- struct trusted_key_payload *p = NULL;
- int ret;
-
- ret = key_payload_reserve(key, sizeof *p);
- if (ret < 0)
- return p;
- p = kzalloc(sizeof *p, GFP_KERNEL);
- if (p)
- p->migratable = 1; /* migratable by default */
- return p;
-}
-
-/*
- * trusted_instantiate - create a new trusted key
- *
- * Unseal an existing trusted blob or, for a new key, get a
- * random key, then seal and create a trusted key-type key,
- * adding it to the specified keyring.
- *
- * On success, return 0. Otherwise return errno.
- */
-static int trusted_instantiate(struct key *key,
- struct key_preparsed_payload *prep)
-{
- struct trusted_key_payload *payload = NULL;
struct trusted_key_options *options = NULL;
- size_t datalen = prep->datalen;
- char *datablob;
int ret = 0;
- int key_cmd;
- size_t key_len;
int tpm2;
tpm2 = tpm_is_tpm2(chip);
if (tpm2 < 0)
return tpm2;
- if (datalen <= 0 || datalen > 32767 || !prep->data)
- return -EINVAL;
-
- datablob = kmalloc(datalen + 1, GFP_KERNEL);
- if (!datablob)
+ options = trusted_options_alloc();
+ if (!options)
return -ENOMEM;
- memcpy(datablob, prep->data, datalen);
- datablob[datalen] = '\0';
- options = trusted_options_alloc();
- if (!options) {
- ret = -ENOMEM;
- goto out;
- }
- payload = trusted_payload_alloc(key);
- if (!payload) {
- ret = -ENOMEM;
+ ret = getoptions(datablob, p, options);
+ if (ret < 0)
goto out;
- }
+ dump_options(options);
- key_cmd = datablob_parse(datablob, payload, options);
- if (key_cmd < 0) {
- ret = key_cmd;
+ if (!options->keyhandle && !tpm2) {
+ ret = -EINVAL;
goto out;
}
- if (!options->keyhandle) {
- ret = -EINVAL;
+ if (tpm2)
+ ret = tpm2_seal_trusted(chip, p, options);
+ else
+ ret = key_seal(p, options);
+ if (ret < 0) {
+ pr_info("key_seal failed (%d)\n", ret);
goto out;
}
- dump_payload(payload);
- dump_options(options);
-
- switch (key_cmd) {
- case Opt_load:
- if (tpm2)
- ret = tpm2_unseal_trusted(chip, payload, options);
- else
- ret = key_unseal(payload, options);
- dump_payload(payload);
- dump_options(options);
- if (ret < 0)
- pr_info("trusted_key: key_unseal failed (%d)\n", ret);
- break;
- case Opt_new:
- key_len = payload->key_len;
- ret = tpm_get_random(chip, payload->key, key_len);
- if (ret < 0)
- goto out;
-
- if (ret != key_len) {
- pr_info("trusted_key: key_create failed (%d)\n", ret);
- ret = -EIO;
+ if (options->pcrlock) {
+ ret = pcrlock(options->pcrlock);
+ if (ret < 0) {
+ pr_info("pcrlock failed (%d)\n", ret);
goto out;
}
- if (tpm2)
- ret = tpm2_seal_trusted(chip, payload, options);
- else
- ret = key_seal(payload, options);
- if (ret < 0)
- pr_info("trusted_key: key_seal failed (%d)\n", ret);
- break;
- default:
- ret = -EINVAL;
- goto out;
}
- if (!ret && options->pcrlock)
- ret = pcrlock(options->pcrlock);
out:
- kfree_sensitive(datablob);
kfree_sensitive(options);
- if (!ret)
- rcu_assign_keypointer(key, payload);
- else
- kfree_sensitive(payload);
return ret;
}
-static void trusted_rcu_free(struct rcu_head *rcu)
+static int trusted_tpm_unseal(struct trusted_key_payload *p, char *datablob)
{
- struct trusted_key_payload *p;
-
- p = container_of(rcu, struct trusted_key_payload, rcu);
- kfree_sensitive(p);
-}
-
-/*
- * trusted_update - reseal an existing key with new PCR values
- */
-static int trusted_update(struct key *key, struct key_preparsed_payload *prep)
-{
- struct trusted_key_payload *p;
- struct trusted_key_payload *new_p;
- struct trusted_key_options *new_o;
- size_t datalen = prep->datalen;
- char *datablob;
+ struct trusted_key_options *options = NULL;
int ret = 0;
+ int tpm2;
- if (key_is_negative(key))
- return -ENOKEY;
- p = key->payload.data[0];
- if (!p->migratable)
- return -EPERM;
- if (datalen <= 0 || datalen > 32767 || !prep->data)
- return -EINVAL;
+ tpm2 = tpm_is_tpm2(chip);
+ if (tpm2 < 0)
+ return tpm2;
- datablob = kmalloc(datalen + 1, GFP_KERNEL);
- if (!datablob)
+ options = trusted_options_alloc();
+ if (!options)
return -ENOMEM;
- new_o = trusted_options_alloc();
- if (!new_o) {
- ret = -ENOMEM;
- goto out;
- }
- new_p = trusted_payload_alloc(key);
- if (!new_p) {
- ret = -ENOMEM;
- goto out;
- }
- memcpy(datablob, prep->data, datalen);
- datablob[datalen] = '\0';
- ret = datablob_parse(datablob, new_p, new_o);
- if (ret != Opt_update) {
- ret = -EINVAL;
- kfree_sensitive(new_p);
+ ret = getoptions(datablob, p, options);
+ if (ret < 0)
goto out;
- }
+ dump_options(options);
- if (!new_o->keyhandle) {
+ if (!options->keyhandle && !tpm2) {
ret = -EINVAL;
- kfree_sensitive(new_p);
goto out;
}
- /* copy old key values, and reseal with new pcrs */
- new_p->migratable = p->migratable;
- new_p->key_len = p->key_len;
- memcpy(new_p->key, p->key, p->key_len);
- dump_payload(p);
- dump_payload(new_p);
+ if (tpm2)
+ ret = tpm2_unseal_trusted(chip, p, options);
+ else
+ ret = key_unseal(p, options);
+ if (ret < 0)
+ pr_info("key_unseal failed (%d)\n", ret);
- ret = key_seal(new_p, new_o);
- if (ret < 0) {
- pr_info("trusted_key: key_seal failed (%d)\n", ret);
- kfree_sensitive(new_p);
- goto out;
- }
- if (new_o->pcrlock) {
- ret = pcrlock(new_o->pcrlock);
+ if (options->pcrlock) {
+ ret = pcrlock(options->pcrlock);
if (ret < 0) {
- pr_info("trusted_key: pcrlock failed (%d)\n", ret);
- kfree_sensitive(new_p);
+ pr_info("pcrlock failed (%d)\n", ret);
goto out;
}
}
- rcu_assign_keypointer(key, new_p);
- call_rcu(&p->rcu, trusted_rcu_free);
out:
- kfree_sensitive(datablob);
- kfree_sensitive(new_o);
+ kfree_sensitive(options);
return ret;
}
-/*
- * trusted_read - copy the sealed blob data to userspace in hex.
- * On success, return to userspace the trusted key datablob size.
- */
-static long trusted_read(const struct key *key, char *buffer,
- size_t buflen)
-{
- const struct trusted_key_payload *p;
- char *bufp;
- int i;
-
- p = dereference_key_locked(key);
- if (!p)
- return -EINVAL;
-
- if (buffer && buflen >= 2 * p->blob_len) {
- bufp = buffer;
- for (i = 0; i < p->blob_len; i++)
- bufp = hex_byte_pack(bufp, p->blob[i]);
- }
- return 2 * p->blob_len;
-}
-
-/*
- * trusted_destroy - clear and free the key's payload
- */
-static void trusted_destroy(struct key *key)
+static int trusted_tpm_get_random(unsigned char *key, size_t key_len)
{
- kfree_sensitive(key->payload.data[0]);
+ return tpm_get_random(chip, key, key_len);
}
-struct key_type key_type_trusted = {
- .name = "trusted",
- .instantiate = trusted_instantiate,
- .update = trusted_update,
- .destroy = trusted_destroy,
- .describe = user_describe,
- .read = trusted_read,
-};
-
-EXPORT_SYMBOL_GPL(key_type_trusted);
-
static void trusted_shash_release(void)
{
if (hashalg)
@@ -1196,14 +990,14 @@ static int __init trusted_shash_alloc(void)
hmacalg = crypto_alloc_shash(hmac_alg, 0, 0);
if (IS_ERR(hmacalg)) {
- pr_info("trusted_key: could not allocate crypto %s\n",
+ pr_info("could not allocate crypto %s\n",
hmac_alg);
return PTR_ERR(hmacalg);
}
hashalg = crypto_alloc_shash(hash_alg, 0, 0);
if (IS_ERR(hashalg)) {
- pr_info("trusted_key: could not allocate crypto %s\n",
+ pr_info("could not allocate crypto %s\n",
hash_alg);
ret = PTR_ERR(hashalg);
goto hashalg_fail;
@@ -1231,16 +1025,13 @@ static int __init init_digests(void)
return 0;
}
-static int __init init_trusted(void)
+static int __init trusted_tpm_init(void)
{
int ret;
- /* encrypted_keys.ko depends on successful load of this module even if
- * TPM is not used.
- */
chip = tpm_default_chip();
if (!chip)
- return 0;
+ return -ENODEV;
ret = init_digests();
if (ret < 0)
@@ -1261,7 +1052,7 @@ err_put:
return ret;
}
-static void __exit cleanup_trusted(void)
+static void trusted_tpm_exit(void)
{
if (chip) {
put_device(&chip->dev);
@@ -1271,7 +1062,11 @@ static void __exit cleanup_trusted(void)
}
}
-late_initcall(init_trusted);
-module_exit(cleanup_trusted);
-
-MODULE_LICENSE("GPL");
+struct trusted_key_ops trusted_key_tpm_ops = {
+ .migratable = 1, /* migratable by default */
+ .init = trusted_tpm_init,
+ .seal = trusted_tpm_seal,
+ .unseal = trusted_tpm_unseal,
+ .get_random = trusted_tpm_get_random,
+ .exit = trusted_tpm_exit,
+};
diff --git a/security/keys/trusted-keys/trusted_tpm2.c b/security/keys/trusted-keys/trusted_tpm2.c
index e2a0ed5d02f0..617fabd4d913 100644
--- a/security/keys/trusted-keys/trusted_tpm2.c
+++ b/security/keys/trusted-keys/trusted_tpm2.c
@@ -4,6 +4,8 @@
* Copyright (C) 2014 Intel Corporation
*/
+#include <linux/asn1_encoder.h>
+#include <linux/oid_registry.h>
#include <linux/string.h>
#include <linux/err.h>
#include <linux/tpm.h>
@@ -12,6 +14,10 @@
#include <keys/trusted-type.h>
#include <keys/trusted_tpm.h>
+#include <asm/unaligned.h>
+
+#include "tpm2key.asn1.h"
+
static struct tpm2_hash tpm2_hash_map[] = {
{HASH_ALGO_SHA1, TPM_ALG_SHA1},
{HASH_ALGO_SHA256, TPM_ALG_SHA256},
@@ -20,6 +26,165 @@ static struct tpm2_hash tpm2_hash_map[] = {
{HASH_ALGO_SM3_256, TPM_ALG_SM3_256},
};
+static u32 tpm2key_oid[] = { 2, 23, 133, 10, 1, 5 };
+
+static int tpm2_key_encode(struct trusted_key_payload *payload,
+ struct trusted_key_options *options,
+ u8 *src, u32 len)
+{
+ const int SCRATCH_SIZE = PAGE_SIZE;
+ u8 *scratch = kmalloc(SCRATCH_SIZE, GFP_KERNEL);
+ u8 *work = scratch, *work1;
+ u8 *end_work = scratch + SCRATCH_SIZE;
+ u8 *priv, *pub;
+ u16 priv_len, pub_len;
+
+ priv_len = get_unaligned_be16(src) + 2;
+ priv = src;
+
+ src += priv_len;
+
+ pub_len = get_unaligned_be16(src) + 2;
+ pub = src;
+
+ if (!scratch)
+ return -ENOMEM;
+
+ work = asn1_encode_oid(work, end_work, tpm2key_oid,
+ asn1_oid_len(tpm2key_oid));
+
+ if (options->blobauth_len == 0) {
+ unsigned char bool[3], *w = bool;
+ /* tag 0 is emptyAuth */
+ w = asn1_encode_boolean(w, w + sizeof(bool), true);
+ if (WARN(IS_ERR(w), "BUG: Boolean failed to encode"))
+ return PTR_ERR(w);
+ work = asn1_encode_tag(work, end_work, 0, bool, w - bool);
+ }
+
+ /*
+ * Assume both octet strings will encode to a 2 byte definite length
+ *
+ * Note: For a well behaved TPM, this warning should never
+ * trigger, so if it does there's something nefarious going on
+ */
+ if (WARN(work - scratch + pub_len + priv_len + 14 > SCRATCH_SIZE,
+ "BUG: scratch buffer is too small"))
+ return -EINVAL;
+
+ work = asn1_encode_integer(work, end_work, options->keyhandle);
+ work = asn1_encode_octet_string(work, end_work, pub, pub_len);
+ work = asn1_encode_octet_string(work, end_work, priv, priv_len);
+
+ work1 = payload->blob;
+ work1 = asn1_encode_sequence(work1, work1 + sizeof(payload->blob),
+ scratch, work - scratch);
+ if (WARN(IS_ERR(work1), "BUG: ASN.1 encoder failed"))
+ return PTR_ERR(work1);
+
+ return work1 - payload->blob;
+}
+
+struct tpm2_key_context {
+ u32 parent;
+ const u8 *pub;
+ u32 pub_len;
+ const u8 *priv;
+ u32 priv_len;
+};
+
+static int tpm2_key_decode(struct trusted_key_payload *payload,
+ struct trusted_key_options *options,
+ u8 **buf)
+{
+ int ret;
+ struct tpm2_key_context ctx;
+ u8 *blob;
+
+ memset(&ctx, 0, sizeof(ctx));
+
+ ret = asn1_ber_decoder(&tpm2key_decoder, &ctx, payload->blob,
+ payload->blob_len);
+ if (ret < 0)
+ return ret;
+
+ if (ctx.priv_len + ctx.pub_len > MAX_BLOB_SIZE)
+ return -EINVAL;
+
+ blob = kmalloc(ctx.priv_len + ctx.pub_len + 4, GFP_KERNEL);
+ if (!blob)
+ return -ENOMEM;
+
+ *buf = blob;
+ options->keyhandle = ctx.parent;
+
+ memcpy(blob, ctx.priv, ctx.priv_len);
+ blob += ctx.priv_len;
+
+ memcpy(blob, ctx.pub, ctx.pub_len);
+
+ return 0;
+}
+
+int tpm2_key_parent(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct tpm2_key_context *ctx = context;
+ const u8 *v = value;
+ int i;
+
+ ctx->parent = 0;
+ for (i = 0; i < vlen; i++) {
+ ctx->parent <<= 8;
+ ctx->parent |= v[i];
+ }
+
+ return 0;
+}
+
+int tpm2_key_type(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ enum OID oid = look_up_OID(value, vlen);
+
+ if (oid != OID_TPMSealedData) {
+ char buffer[50];
+
+ sprint_oid(value, vlen, buffer, sizeof(buffer));
+ pr_debug("OID is \"%s\" which is not TPMSealedData\n",
+ buffer);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int tpm2_key_pub(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct tpm2_key_context *ctx = context;
+
+ ctx->pub = value;
+ ctx->pub_len = vlen;
+
+ return 0;
+}
+
+int tpm2_key_priv(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct tpm2_key_context *ctx = context;
+
+ ctx->priv = value;
+ ctx->priv_len = vlen;
+
+ return 0;
+}
+
/**
* tpm_buf_append_auth() - append TPMS_AUTH_COMMAND to the buffer.
*
@@ -63,9 +228,10 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
struct trusted_key_payload *payload,
struct trusted_key_options *options)
{
- unsigned int blob_len;
+ int blob_len = 0;
struct tpm_buf buf;
u32 hash;
+ u32 flags;
int i;
int rc;
@@ -79,7 +245,10 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
if (i == ARRAY_SIZE(tpm2_hash_map))
return -EINVAL;
- rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_CREATE);
+ if (!options->keyhandle)
+ return -EINVAL;
+
+ rc = tpm_try_get_ops(chip);
if (rc)
return rc;
@@ -97,29 +266,32 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
TPM_DIGEST_SIZE);
/* sensitive */
- tpm_buf_append_u16(&buf, 4 + TPM_DIGEST_SIZE + payload->key_len + 1);
+ tpm_buf_append_u16(&buf, 4 + options->blobauth_len + payload->key_len);
+
+ tpm_buf_append_u16(&buf, options->blobauth_len);
+ if (options->blobauth_len)
+ tpm_buf_append(&buf, options->blobauth, options->blobauth_len);
- tpm_buf_append_u16(&buf, TPM_DIGEST_SIZE);
- tpm_buf_append(&buf, options->blobauth, TPM_DIGEST_SIZE);
- tpm_buf_append_u16(&buf, payload->key_len + 1);
+ tpm_buf_append_u16(&buf, payload->key_len);
tpm_buf_append(&buf, payload->key, payload->key_len);
- tpm_buf_append_u8(&buf, payload->migratable);
/* public */
tpm_buf_append_u16(&buf, 14 + options->policydigest_len);
tpm_buf_append_u16(&buf, TPM_ALG_KEYEDHASH);
tpm_buf_append_u16(&buf, hash);
+ /* key properties */
+ flags = 0;
+ flags |= options->policydigest_len ? 0 : TPM2_OA_USER_WITH_AUTH;
+ flags |= payload->migratable ? (TPM2_OA_FIXED_TPM |
+ TPM2_OA_FIXED_PARENT) : 0;
+ tpm_buf_append_u32(&buf, flags);
+
/* policy */
- if (options->policydigest_len) {
- tpm_buf_append_u32(&buf, 0);
- tpm_buf_append_u16(&buf, options->policydigest_len);
+ tpm_buf_append_u16(&buf, options->policydigest_len);
+ if (options->policydigest_len)
tpm_buf_append(&buf, options->policydigest,
options->policydigest_len);
- } else {
- tpm_buf_append_u32(&buf, TPM2_OA_USER_WITH_AUTH);
- tpm_buf_append_u16(&buf, 0);
- }
/* public parameters */
tpm_buf_append_u16(&buf, TPM_ALG_NULL);
@@ -150,8 +322,9 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
goto out;
}
- memcpy(payload->blob, &buf.data[TPM_HEADER_SIZE + 4], blob_len);
- payload->blob_len = blob_len;
+ blob_len = tpm2_key_encode(payload, options,
+ &buf.data[TPM_HEADER_SIZE + 4],
+ blob_len);
out:
tpm_buf_destroy(&buf);
@@ -162,6 +335,10 @@ out:
else
rc = -EPERM;
}
+ if (blob_len < 0)
+ return blob_len;
+
+ payload->blob_len = blob_len;
tpm_put_ops(chip);
return rc;
@@ -189,13 +366,45 @@ static int tpm2_load_cmd(struct tpm_chip *chip,
unsigned int private_len;
unsigned int public_len;
unsigned int blob_len;
+ u8 *blob, *pub;
int rc;
+ u32 attrs;
+
+ rc = tpm2_key_decode(payload, options, &blob);
+ if (rc) {
+ /* old form */
+ blob = payload->blob;
+ payload->old_format = 1;
+ }
+
+ /* new format carries keyhandle but old format doesn't */
+ if (!options->keyhandle)
+ return -EINVAL;
- private_len = be16_to_cpup((__be16 *) &payload->blob[0]);
- if (private_len > (payload->blob_len - 2))
+ /* must be big enough for at least the two be16 size counts */
+ if (payload->blob_len < 4)
+ return -EINVAL;
+
+ private_len = get_unaligned_be16(blob);
+
+ /* must be big enough for following public_len */
+ if (private_len + 2 + 2 > (payload->blob_len))
+ return -E2BIG;
+
+ public_len = get_unaligned_be16(blob + 2 + private_len);
+ if (private_len + 2 + public_len + 2 > payload->blob_len)
return -E2BIG;
- public_len = be16_to_cpup((__be16 *) &payload->blob[2 + private_len]);
+ pub = blob + 2 + private_len + 2;
+ /* key attributes are always at offset 4 */
+ attrs = get_unaligned_be32(pub + 4);
+
+ if ((attrs & (TPM2_OA_FIXED_TPM | TPM2_OA_FIXED_PARENT)) ==
+ (TPM2_OA_FIXED_TPM | TPM2_OA_FIXED_PARENT))
+ payload->migratable = 0;
+ else
+ payload->migratable = 1;
+
blob_len = private_len + public_len + 4;
if (blob_len > payload->blob_len)
return -E2BIG;
@@ -211,7 +420,7 @@ static int tpm2_load_cmd(struct tpm_chip *chip,
options->keyauth /* hmac */,
TPM_DIGEST_SIZE);
- tpm_buf_append(&buf, payload->blob, blob_len);
+ tpm_buf_append(&buf, blob, blob_len);
if (buf.flags & TPM_BUF_OVERFLOW) {
rc = -E2BIG;
@@ -224,6 +433,8 @@ static int tpm2_load_cmd(struct tpm_chip *chip,
(__be32 *) &buf.data[TPM_HEADER_SIZE]);
out:
+ if (blob != payload->blob)
+ kfree(blob);
tpm_buf_destroy(&buf);
if (rc > 0)
@@ -265,7 +476,7 @@ static int tpm2_unseal_cmd(struct tpm_chip *chip,
NULL /* nonce */, 0,
TPM2_SA_CONTINUE_SESSION,
options->blobauth /* hmac */,
- TPM_DIGEST_SIZE);
+ options->blobauth_len);
rc = tpm_transmit_cmd(chip, &buf, 6, "unsealing");
if (rc > 0)
@@ -274,7 +485,7 @@ static int tpm2_unseal_cmd(struct tpm_chip *chip,
if (!rc) {
data_len = be16_to_cpup(
(__be16 *) &buf.data[TPM_HEADER_SIZE + 4]);
- if (data_len < MIN_KEY_SIZE || data_len > MAX_KEY_SIZE + 1) {
+ if (data_len < MIN_KEY_SIZE || data_len > MAX_KEY_SIZE) {
rc = -EFAULT;
goto out;
}
@@ -285,9 +496,19 @@ static int tpm2_unseal_cmd(struct tpm_chip *chip,
}
data = &buf.data[TPM_HEADER_SIZE + 6];
- memcpy(payload->key, data, data_len - 1);
- payload->key_len = data_len - 1;
- payload->migratable = data[data_len - 1];
+ if (payload->old_format) {
+ /* migratable flag is at the end of the key */
+ memcpy(payload->key, data, data_len - 1);
+ payload->key_len = data_len - 1;
+ payload->migratable = data[data_len - 1];
+ } else {
+ /*
+ * migratable flag already collected from key
+ * attributes
+ */
+ memcpy(payload->key, data, data_len);
+ payload->key_len = data_len;
+ }
}
out:
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 6fe25300b89d..7650de048570 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -219,14 +219,21 @@ static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_GENFS_SECLABEL_SYMLINKS]);
}
+struct selinux_policy_convert_data;
+
+struct selinux_load_state {
+ struct selinux_policy *policy;
+ struct selinux_policy_convert_data *convert_data;
+};
+
int security_mls_enabled(struct selinux_state *state);
int security_load_policy(struct selinux_state *state,
- void *data, size_t len,
- struct selinux_policy **newpolicyp);
+ void *data, size_t len,
+ struct selinux_load_state *load_state);
void selinux_policy_commit(struct selinux_state *state,
- struct selinux_policy *newpolicy);
+ struct selinux_load_state *load_state);
void selinux_policy_cancel(struct selinux_state *state,
- struct selinux_policy *policy);
+ struct selinux_load_state *load_state);
int security_read_policy(struct selinux_state *state,
void **data, size_t *len);
int security_read_state_kernel(struct selinux_state *state,
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 01a7d50ed39b..fff6babeeae6 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -563,17 +563,13 @@ static int sel_make_policy_nodes(struct selinux_fs_info *fsi,
ret = sel_make_bools(newpolicy, tmp_bool_dir, &tmp_bool_num,
&tmp_bool_names, &tmp_bool_values);
- if (ret) {
- pr_err("SELinux: failed to load policy booleans\n");
+ if (ret)
goto out;
- }
ret = sel_make_classes(newpolicy, tmp_class_dir,
&fsi->last_class_ino);
- if (ret) {
- pr_err("SELinux: failed to load policy classes\n");
+ if (ret)
goto out;
- }
/* booleans */
old_dentry = fsi->bool_dir;
@@ -616,7 +612,7 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
{
struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
- struct selinux_policy *newpolicy;
+ struct selinux_load_state load_state;
ssize_t length;
void *data = NULL;
@@ -642,23 +638,23 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
if (copy_from_user(data, buf, count) != 0)
goto out;
- length = security_load_policy(fsi->state, data, count, &newpolicy);
+ length = security_load_policy(fsi->state, data, count, &load_state);
if (length) {
pr_warn_ratelimited("SELinux: failed to load policy\n");
goto out;
}
- length = sel_make_policy_nodes(fsi, newpolicy);
+ length = sel_make_policy_nodes(fsi, load_state.policy);
if (length) {
- selinux_policy_cancel(fsi->state, newpolicy);
- goto out1;
+ pr_warn_ratelimited("SELinux: failed to initialize selinuxfs\n");
+ selinux_policy_cancel(fsi->state, &load_state);
+ goto out;
}
- selinux_policy_commit(fsi->state, newpolicy);
+ selinux_policy_commit(fsi->state, &load_state);
length = count;
-out1:
audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
"auid=%u ses=%u lsm=selinux res=1",
from_kuid(&init_user_ns, audit_get_loginuid(current)),
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index 6dcb6aa4db7f..75df32906055 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -109,7 +109,7 @@ static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_dat
struct avtab_node *prev, *cur, *newnode;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
- if (!h)
+ if (!h || !h->nslot)
return -EINVAL;
hvalue = avtab_hash(key, h->mask);
@@ -154,7 +154,7 @@ avtab_insert_nonunique(struct avtab *h, struct avtab_key *key, struct avtab_datu
struct avtab_node *prev, *cur;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
- if (!h)
+ if (!h || !h->nslot)
return NULL;
hvalue = avtab_hash(key, h->mask);
for (prev = NULL, cur = h->htable[hvalue];
@@ -184,7 +184,7 @@ struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key)
struct avtab_node *cur;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
- if (!h)
+ if (!h || !h->nslot)
return NULL;
hvalue = avtab_hash(key, h->mask);
@@ -220,7 +220,7 @@ avtab_search_node(struct avtab *h, struct avtab_key *key)
struct avtab_node *cur;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
- if (!h)
+ if (!h || !h->nslot)
return NULL;
hvalue = avtab_hash(key, h->mask);
@@ -295,6 +295,7 @@ void avtab_destroy(struct avtab *h)
}
kvfree(h->htable);
h->htable = NULL;
+ h->nel = 0;
h->nslot = 0;
h->mask = 0;
}
@@ -303,88 +304,52 @@ void avtab_init(struct avtab *h)
{
h->htable = NULL;
h->nel = 0;
+ h->nslot = 0;
+ h->mask = 0;
}
-int avtab_alloc(struct avtab *h, u32 nrules)
+static int avtab_alloc_common(struct avtab *h, u32 nslot)
{
- u32 mask = 0;
- u32 shift = 0;
- u32 work = nrules;
- u32 nslot = 0;
-
- if (nrules == 0)
- goto avtab_alloc_out;
-
- while (work) {
- work = work >> 1;
- shift++;
- }
- if (shift > 2)
- shift = shift - 2;
- nslot = 1 << shift;
- if (nslot > MAX_AVTAB_HASH_BUCKETS)
- nslot = MAX_AVTAB_HASH_BUCKETS;
- mask = nslot - 1;
+ if (!nslot)
+ return 0;
h->htable = kvcalloc(nslot, sizeof(void *), GFP_KERNEL);
if (!h->htable)
return -ENOMEM;
- avtab_alloc_out:
- h->nel = 0;
h->nslot = nslot;
- h->mask = mask;
- pr_debug("SELinux: %d avtab hash slots, %d rules.\n",
- h->nslot, nrules);
+ h->mask = nslot - 1;
return 0;
}
-int avtab_duplicate(struct avtab *new, struct avtab *orig)
+int avtab_alloc(struct avtab *h, u32 nrules)
{
- int i;
- struct avtab_node *node, *tmp, *tail;
-
- memset(new, 0, sizeof(*new));
+ int rc;
+ u32 nslot = 0;
- new->htable = kvcalloc(orig->nslot, sizeof(void *), GFP_KERNEL);
- if (!new->htable)
- return -ENOMEM;
- new->nslot = orig->nslot;
- new->mask = orig->mask;
-
- for (i = 0; i < orig->nslot; i++) {
- tail = NULL;
- for (node = orig->htable[i]; node; node = node->next) {
- tmp = kmem_cache_zalloc(avtab_node_cachep, GFP_KERNEL);
- if (!tmp)
- goto error;
- tmp->key = node->key;
- if (tmp->key.specified & AVTAB_XPERMS) {
- tmp->datum.u.xperms =
- kmem_cache_zalloc(avtab_xperms_cachep,
- GFP_KERNEL);
- if (!tmp->datum.u.xperms) {
- kmem_cache_free(avtab_node_cachep, tmp);
- goto error;
- }
- tmp->datum.u.xperms = node->datum.u.xperms;
- } else
- tmp->datum.u.data = node->datum.u.data;
-
- if (tail)
- tail->next = tmp;
- else
- new->htable[i] = tmp;
-
- tail = tmp;
- new->nel++;
+ if (nrules != 0) {
+ u32 shift = 1;
+ u32 work = nrules >> 3;
+ while (work) {
+ work >>= 1;
+ shift++;
}
+ nslot = 1 << shift;
+ if (nslot > MAX_AVTAB_HASH_BUCKETS)
+ nslot = MAX_AVTAB_HASH_BUCKETS;
+
+ rc = avtab_alloc_common(h, nslot);
+ if (rc)
+ return rc;
}
+ pr_debug("SELinux: %d avtab hash slots, %d rules.\n", nslot, nrules);
return 0;
-error:
- avtab_destroy(new);
- return -ENOMEM;
+}
+
+int avtab_alloc_dup(struct avtab *new, const struct avtab *orig)
+{
+ return avtab_alloc_common(new, orig->nslot);
}
void avtab_hash_eval(struct avtab *h, char *tag)
diff --git a/security/selinux/ss/avtab.h b/security/selinux/ss/avtab.h
index 4c4445ca9118..f2eeb36265d1 100644
--- a/security/selinux/ss/avtab.h
+++ b/security/selinux/ss/avtab.h
@@ -89,7 +89,7 @@ struct avtab {
void avtab_init(struct avtab *h);
int avtab_alloc(struct avtab *, u32);
-int avtab_duplicate(struct avtab *new, struct avtab *orig);
+int avtab_alloc_dup(struct avtab *new, const struct avtab *orig);
struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *k);
void avtab_destroy(struct avtab *h);
void avtab_hash_eval(struct avtab *h, char *tag);
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 0b32f3ab025e..1ef74c085f2b 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -605,7 +605,6 @@ static int cond_dup_av_list(struct cond_av_list *new,
struct cond_av_list *orig,
struct avtab *avtab)
{
- struct avtab_node *avnode;
u32 i;
memset(new, 0, sizeof(*new));
@@ -615,10 +614,11 @@ static int cond_dup_av_list(struct cond_av_list *new,
return -ENOMEM;
for (i = 0; i < orig->len; i++) {
- avnode = avtab_search_node(avtab, &orig->nodes[i]->key);
- if (WARN_ON(!avnode))
- return -EINVAL;
- new->nodes[i] = avnode;
+ new->nodes[i] = avtab_insert_nonunique(avtab,
+ &orig->nodes[i]->key,
+ &orig->nodes[i]->datum);
+ if (!new->nodes[i])
+ return -ENOMEM;
new->len++;
}
@@ -630,7 +630,7 @@ static int duplicate_policydb_cond_list(struct policydb *newp,
{
int rc, i, j;
- rc = avtab_duplicate(&newp->te_cond_avtab, &origp->te_cond_avtab);
+ rc = avtab_alloc_dup(&newp->te_cond_avtab, &origp->te_cond_avtab);
if (rc)
return rc;
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 3438d0130378..301633145040 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -67,6 +67,17 @@
#include "policycap_names.h"
#include "ima.h"
+struct convert_context_args {
+ struct selinux_state *state;
+ struct policydb *oldp;
+ struct policydb *newp;
+};
+
+struct selinux_policy_convert_data {
+ struct convert_context_args args;
+ struct sidtab_convert_params sidtab_params;
+};
+
/* Forward declaration. */
static int context_struct_to_string(struct policydb *policydb,
struct context *context,
@@ -1541,6 +1552,7 @@ static int security_context_to_sid_core(struct selinux_state *state,
if (!str)
goto out;
}
+retry:
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -1554,6 +1566,15 @@ static int security_context_to_sid_core(struct selinux_state *state,
} else if (rc)
goto out_unlock;
rc = sidtab_context_to_sid(sidtab, &context, sid);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ if (context.str) {
+ str = context.str;
+ context.str = NULL;
+ }
+ context_destroy(&context);
+ goto retry;
+ }
context_destroy(&context);
out_unlock:
rcu_read_unlock();
@@ -1703,7 +1724,7 @@ static int security_compute_sid(struct selinux_state *state,
struct selinux_policy *policy;
struct policydb *policydb;
struct sidtab *sidtab;
- struct class_datum *cladatum = NULL;
+ struct class_datum *cladatum;
struct context *scontext, *tcontext, newcontext;
struct sidtab_entry *sentry, *tentry;
struct avtab_key avkey;
@@ -1725,6 +1746,8 @@ static int security_compute_sid(struct selinux_state *state,
goto out;
}
+retry:
+ cladatum = NULL;
context_init(&newcontext);
rcu_read_lock();
@@ -1869,6 +1892,11 @@ static int security_compute_sid(struct selinux_state *state,
}
/* Obtain the sid for the context. */
rc = sidtab_context_to_sid(sidtab, &newcontext, out_sid);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ context_destroy(&newcontext);
+ goto retry;
+ }
out_unlock:
rcu_read_unlock();
context_destroy(&newcontext);
@@ -1974,12 +2002,6 @@ static inline int convert_context_handle_invalid_context(
return 0;
}
-struct convert_context_args {
- struct selinux_state *state;
- struct policydb *oldp;
- struct policydb *newp;
-};
-
/*
* Convert the values in the security context
* structure `oldc' from the values specified
@@ -2159,7 +2181,7 @@ static void selinux_policy_cond_free(struct selinux_policy *policy)
}
void selinux_policy_cancel(struct selinux_state *state,
- struct selinux_policy *policy)
+ struct selinux_load_state *load_state)
{
struct selinux_policy *oldpolicy;
@@ -2167,7 +2189,8 @@ void selinux_policy_cancel(struct selinux_state *state,
lockdep_is_held(&state->policy_mutex));
sidtab_cancel_convert(oldpolicy->sidtab);
- selinux_policy_free(policy);
+ selinux_policy_free(load_state->policy);
+ kfree(load_state->convert_data);
}
static void selinux_notify_policy_change(struct selinux_state *state,
@@ -2183,9 +2206,10 @@ static void selinux_notify_policy_change(struct selinux_state *state,
}
void selinux_policy_commit(struct selinux_state *state,
- struct selinux_policy *newpolicy)
+ struct selinux_load_state *load_state)
{
- struct selinux_policy *oldpolicy;
+ struct selinux_policy *oldpolicy, *newpolicy = load_state->policy;
+ unsigned long flags;
u32 seqno;
oldpolicy = rcu_dereference_protected(state->policy,
@@ -2207,7 +2231,13 @@ void selinux_policy_commit(struct selinux_state *state,
seqno = newpolicy->latest_granting;
/* Install the new policy. */
- rcu_assign_pointer(state->policy, newpolicy);
+ if (oldpolicy) {
+ sidtab_freeze_begin(oldpolicy->sidtab, &flags);
+ rcu_assign_pointer(state->policy, newpolicy);
+ sidtab_freeze_end(oldpolicy->sidtab, &flags);
+ } else {
+ rcu_assign_pointer(state->policy, newpolicy);
+ }
/* Load the policycaps from the new policy */
security_load_policycaps(state, newpolicy);
@@ -2225,6 +2255,7 @@ void selinux_policy_commit(struct selinux_state *state,
/* Free the old policy */
synchronize_rcu();
selinux_policy_free(oldpolicy);
+ kfree(load_state->convert_data);
/* Notify others of the policy change */
selinux_notify_policy_change(state, seqno);
@@ -2241,11 +2272,10 @@ void selinux_policy_commit(struct selinux_state *state,
* loading the new policy.
*/
int security_load_policy(struct selinux_state *state, void *data, size_t len,
- struct selinux_policy **newpolicyp)
+ struct selinux_load_state *load_state)
{
struct selinux_policy *newpolicy, *oldpolicy;
- struct sidtab_convert_params convert_params;
- struct convert_context_args args;
+ struct selinux_policy_convert_data *convert_data;
int rc = 0;
struct policy_file file = { data, len }, *fp = &file;
@@ -2275,10 +2305,10 @@ int security_load_policy(struct selinux_state *state, void *data, size_t len,
goto err_mapping;
}
-
if (!selinux_initialized(state)) {
/* First policy load, so no need to preserve state from old policy */
- *newpolicyp = newpolicy;
+ load_state->policy = newpolicy;
+ load_state->convert_data = NULL;
return 0;
}
@@ -2292,29 +2322,38 @@ int security_load_policy(struct selinux_state *state, void *data, size_t len,
goto err_free_isids;
}
+ convert_data = kmalloc(sizeof(*convert_data), GFP_KERNEL);
+ if (!convert_data) {
+ rc = -ENOMEM;
+ goto err_free_isids;
+ }
+
/*
* Convert the internal representations of contexts
* in the new SID table.
*/
- args.state = state;
- args.oldp = &oldpolicy->policydb;
- args.newp = &newpolicy->policydb;
+ convert_data->args.state = state;
+ convert_data->args.oldp = &oldpolicy->policydb;
+ convert_data->args.newp = &newpolicy->policydb;
- convert_params.func = convert_context;
- convert_params.args = &args;
- convert_params.target = newpolicy->sidtab;
+ convert_data->sidtab_params.func = convert_context;
+ convert_data->sidtab_params.args = &convert_data->args;
+ convert_data->sidtab_params.target = newpolicy->sidtab;
- rc = sidtab_convert(oldpolicy->sidtab, &convert_params);
+ rc = sidtab_convert(oldpolicy->sidtab, &convert_data->sidtab_params);
if (rc) {
pr_err("SELinux: unable to convert the internal"
" representation of contexts in the new SID"
" table\n");
- goto err_free_isids;
+ goto err_free_convert_data;
}
- *newpolicyp = newpolicy;
+ load_state->policy = newpolicy;
+ load_state->convert_data = convert_data;
return 0;
+err_free_convert_data:
+ kfree(convert_data);
err_free_isids:
sidtab_destroy(newpolicy->sidtab);
err_mapping:
@@ -2342,13 +2381,15 @@ int security_port_sid(struct selinux_state *state,
struct policydb *policydb;
struct sidtab *sidtab;
struct ocontext *c;
- int rc = 0;
+ int rc;
if (!selinux_initialized(state)) {
*out_sid = SECINITSID_PORT;
return 0;
}
+retry:
+ rc = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2367,6 +2408,10 @@ int security_port_sid(struct selinux_state *state,
if (!c->sid[0]) {
rc = sidtab_context_to_sid(sidtab, &c->context[0],
&c->sid[0]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
}
@@ -2393,13 +2438,15 @@ int security_ib_pkey_sid(struct selinux_state *state,
struct policydb *policydb;
struct sidtab *sidtab;
struct ocontext *c;
- int rc = 0;
+ int rc;
if (!selinux_initialized(state)) {
*out_sid = SECINITSID_UNLABELED;
return 0;
}
+retry:
+ rc = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2420,6 +2467,10 @@ int security_ib_pkey_sid(struct selinux_state *state,
rc = sidtab_context_to_sid(sidtab,
&c->context[0],
&c->sid[0]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
}
@@ -2445,13 +2496,15 @@ int security_ib_endport_sid(struct selinux_state *state,
struct policydb *policydb;
struct sidtab *sidtab;
struct ocontext *c;
- int rc = 0;
+ int rc;
if (!selinux_initialized(state)) {
*out_sid = SECINITSID_UNLABELED;
return 0;
}
+retry:
+ rc = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2472,6 +2525,10 @@ int security_ib_endport_sid(struct selinux_state *state,
if (!c->sid[0]) {
rc = sidtab_context_to_sid(sidtab, &c->context[0],
&c->sid[0]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
}
@@ -2495,7 +2552,7 @@ int security_netif_sid(struct selinux_state *state,
struct selinux_policy *policy;
struct policydb *policydb;
struct sidtab *sidtab;
- int rc = 0;
+ int rc;
struct ocontext *c;
if (!selinux_initialized(state)) {
@@ -2503,6 +2560,8 @@ int security_netif_sid(struct selinux_state *state,
return 0;
}
+retry:
+ rc = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2519,10 +2578,18 @@ int security_netif_sid(struct selinux_state *state,
if (!c->sid[0] || !c->sid[1]) {
rc = sidtab_context_to_sid(sidtab, &c->context[0],
&c->sid[0]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
rc = sidtab_context_to_sid(sidtab, &c->context[1],
&c->sid[1]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
}
@@ -2572,6 +2639,7 @@ int security_node_sid(struct selinux_state *state,
return 0;
}
+retry:
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2620,6 +2688,10 @@ int security_node_sid(struct selinux_state *state,
rc = sidtab_context_to_sid(sidtab,
&c->context[0],
&c->sid[0]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
}
@@ -2661,18 +2733,24 @@ int security_get_user_sids(struct selinux_state *state,
struct sidtab *sidtab;
struct context *fromcon, usercon;
u32 *mysids = NULL, *mysids2, sid;
- u32 mynel = 0, maxnel = SIDS_NEL;
+ u32 i, j, mynel, maxnel = SIDS_NEL;
struct user_datum *user;
struct role_datum *role;
struct ebitmap_node *rnode, *tnode;
- int rc = 0, i, j;
+ int rc;
*sids = NULL;
*nel = 0;
if (!selinux_initialized(state))
- goto out;
+ return 0;
+
+ mysids = kcalloc(maxnel, sizeof(*mysids), GFP_KERNEL);
+ if (!mysids)
+ return -ENOMEM;
+retry:
+ mynel = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2692,11 +2770,6 @@ int security_get_user_sids(struct selinux_state *state,
usercon.user = user->value;
- rc = -ENOMEM;
- mysids = kcalloc(maxnel, sizeof(*mysids), GFP_ATOMIC);
- 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;
@@ -2708,6 +2781,10 @@ int security_get_user_sids(struct selinux_state *state,
continue;
rc = sidtab_context_to_sid(sidtab, &usercon, &sid);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out_unlock;
if (mynel < maxnel) {
@@ -2730,14 +2807,14 @@ out_unlock:
rcu_read_unlock();
if (rc || !mynel) {
kfree(mysids);
- goto out;
+ return rc;
}
rc = -ENOMEM;
mysids2 = kcalloc(mynel, sizeof(*mysids2), GFP_KERNEL);
if (!mysids2) {
kfree(mysids);
- goto out;
+ return rc;
}
for (i = 0, j = 0; i < mynel; i++) {
struct av_decision dummy_avd;
@@ -2750,12 +2827,10 @@ out_unlock:
mysids2[j++] = mysids[i];
cond_resched();
}
- rc = 0;
kfree(mysids);
*sids = mysids2;
*nel = j;
-out:
- return rc;
+ return 0;
}
/**
@@ -2768,6 +2843,9 @@ out:
* Obtain a SID to use for a file in a filesystem that
* cannot support xattr or use a fixed labeling behavior like
* transition SIDs or task SIDs.
+ *
+ * WARNING: This function may return -ESTALE, indicating that the caller
+ * must retry the operation after re-acquiring the policy pointer!
*/
static inline int __security_genfs_sid(struct selinux_policy *policy,
const char *fstype,
@@ -2846,11 +2924,13 @@ int security_genfs_sid(struct selinux_state *state,
return 0;
}
- rcu_read_lock();
- policy = rcu_dereference(state->policy);
- retval = __security_genfs_sid(policy,
- fstype, path, orig_sclass, sid);
- rcu_read_unlock();
+ do {
+ rcu_read_lock();
+ policy = rcu_dereference(state->policy);
+ retval = __security_genfs_sid(policy, fstype, path,
+ orig_sclass, sid);
+ rcu_read_unlock();
+ } while (retval == -ESTALE);
return retval;
}
@@ -2873,7 +2953,7 @@ int security_fs_use(struct selinux_state *state, struct super_block *sb)
struct selinux_policy *policy;
struct policydb *policydb;
struct sidtab *sidtab;
- int rc = 0;
+ int rc;
struct ocontext *c;
struct superblock_security_struct *sbsec = sb->s_security;
const char *fstype = sb->s_type->name;
@@ -2884,6 +2964,8 @@ int security_fs_use(struct selinux_state *state, struct super_block *sb)
return 0;
}
+retry:
+ rc = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -2901,6 +2983,10 @@ int security_fs_use(struct selinux_state *state, struct super_block *sb)
if (!c->sid[0]) {
rc = sidtab_context_to_sid(sidtab, &c->context[0],
&c->sid[0]);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
goto out;
}
@@ -2908,6 +2994,10 @@ int security_fs_use(struct selinux_state *state, struct super_block *sb)
} else {
rc = __security_genfs_sid(policy, fstype, "/",
SECCLASS_DIR, &sbsec->sid);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc) {
sbsec->behavior = SECURITY_FS_USE_NONE;
rc = 0;
@@ -3117,12 +3207,13 @@ int security_sid_mls_copy(struct selinux_state *state,
u32 len;
int rc;
- rc = 0;
if (!selinux_initialized(state)) {
*new_sid = sid;
- goto out;
+ return 0;
}
+retry:
+ rc = 0;
context_init(&newcon);
rcu_read_lock();
@@ -3181,10 +3272,14 @@ int security_sid_mls_copy(struct selinux_state *state,
}
}
rc = sidtab_context_to_sid(sidtab, &newcon, new_sid);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ context_destroy(&newcon);
+ goto retry;
+ }
out_unlock:
rcu_read_unlock();
context_destroy(&newcon);
-out:
return rc;
}
@@ -3777,6 +3872,8 @@ int security_netlbl_secattr_to_sid(struct selinux_state *state,
return 0;
}
+retry:
+ rc = 0;
rcu_read_lock();
policy = rcu_dereference(state->policy);
policydb = &policy->policydb;
@@ -3803,23 +3900,24 @@ int security_netlbl_secattr_to_sid(struct selinux_state *state,
goto out;
}
rc = -EIDRM;
- if (!mls_context_isvalid(policydb, &ctx_new))
- goto out_free;
+ if (!mls_context_isvalid(policydb, &ctx_new)) {
+ ebitmap_destroy(&ctx_new.range.level[0].cat);
+ goto out;
+ }
rc = sidtab_context_to_sid(sidtab, &ctx_new, sid);
+ ebitmap_destroy(&ctx_new.range.level[0].cat);
+ if (rc == -ESTALE) {
+ rcu_read_unlock();
+ goto retry;
+ }
if (rc)
- goto out_free;
+ goto out;
security_netlbl_cache_add(secattr, *sid);
-
- ebitmap_destroy(&ctx_new.range.level[0].cat);
} else
*sid = SECSID_NULL;
- rcu_read_unlock();
- return 0;
-out_free:
- ebitmap_destroy(&ctx_new.range.level[0].cat);
out:
rcu_read_unlock();
return rc;
diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c
index 5ee190bd30f5..656d50b09f76 100644
--- a/security/selinux/ss/sidtab.c
+++ b/security/selinux/ss/sidtab.c
@@ -39,6 +39,7 @@ int sidtab_init(struct sidtab *s)
for (i = 0; i < SECINITSID_NUM; i++)
s->isids[i].set = 0;
+ s->frozen = false;
s->count = 0;
s->convert = NULL;
hash_init(s->context_to_sid);
@@ -281,6 +282,15 @@ int sidtab_context_to_sid(struct sidtab *s, struct context *context,
if (*sid)
goto out_unlock;
+ if (unlikely(s->frozen)) {
+ /*
+ * This sidtab is now frozen - tell the caller to abort and
+ * get the new one.
+ */
+ rc = -ESTALE;
+ goto out_unlock;
+ }
+
count = s->count;
convert = s->convert;
@@ -474,6 +484,17 @@ void sidtab_cancel_convert(struct sidtab *s)
spin_unlock_irqrestore(&s->lock, flags);
}
+void sidtab_freeze_begin(struct sidtab *s, unsigned long *flags) __acquires(&s->lock)
+{
+ spin_lock_irqsave(&s->lock, *flags);
+ s->frozen = true;
+ s->convert = NULL;
+}
+void sidtab_freeze_end(struct sidtab *s, unsigned long *flags) __releases(&s->lock)
+{
+ spin_unlock_irqrestore(&s->lock, *flags);
+}
+
static void sidtab_destroy_entry(struct sidtab_entry *entry)
{
context_destroy(&entry->context);
diff --git a/security/selinux/ss/sidtab.h b/security/selinux/ss/sidtab.h
index 80c744d07ad6..4eff0e49dcb2 100644
--- a/security/selinux/ss/sidtab.h
+++ b/security/selinux/ss/sidtab.h
@@ -86,6 +86,7 @@ struct sidtab {
u32 count;
/* access only under spinlock */
struct sidtab_convert_params *convert;
+ bool frozen;
spinlock_t lock;
#if CONFIG_SECURITY_SELINUX_SID2STR_CACHE_SIZE > 0
@@ -125,6 +126,9 @@ int sidtab_convert(struct sidtab *s, struct sidtab_convert_params *params);
void sidtab_cancel_convert(struct sidtab *s);
+void sidtab_freeze_begin(struct sidtab *s, unsigned long *flags) __acquires(&s->lock);
+void sidtab_freeze_end(struct sidtab *s, unsigned long *flags) __releases(&s->lock);
+
int sidtab_context_to_sid(struct sidtab *s, struct context *context, u32 *sid);
void sidtab_destroy(struct sidtab *s);
diff --git a/security/tomoyo/network.c b/security/tomoyo/network.c
index 478f757ff843..8dc61335f65e 100644
--- a/security/tomoyo/network.c
+++ b/security/tomoyo/network.c
@@ -613,7 +613,7 @@ static int tomoyo_check_unix_address(struct sockaddr *addr,
static bool tomoyo_kernel_service(void)
{
/* Nothing to do if I am a kernel service. */
- return (current->flags & (PF_KTHREAD | PF_IO_WORKER)) == PF_KTHREAD;
+ return current->flags & PF_KTHREAD;
}
/**
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 17:28:50 +0000