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-rw-r--r--security/integrity/digsig.c2
-rw-r--r--security/integrity/evm/evm_main.c4
-rw-r--r--security/integrity/ima/ima_appraise.c13
-rw-r--r--security/integrity/ima/ima_fs.c2
-rw-r--r--security/integrity/ima/ima_init.c3
-rw-r--r--security/keys/Kconfig2
-rw-r--r--security/keys/big_key.c59
-rw-r--r--security/keys/proc.c2
-rw-r--r--security/smack/smack.h1
-rw-r--r--security/smack/smack_access.c7
-rw-r--r--security/smack/smack_lsm.c117
-rw-r--r--security/smack/smackfs.c3
12 files changed, 101 insertions, 114 deletions
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 4304372b323f..106e855e2d9d 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -51,7 +51,7 @@ static bool init_keyring __initdata;
int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
const char *digest, int digestlen)
{
- if (id >= INTEGRITY_KEYRING_MAX)
+ if (id >= INTEGRITY_KEYRING_MAX || siglen < 2)
return -EINVAL;
if (!keyring[id]) {
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index ba8615576d4d..e2ed498c0f5f 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -145,6 +145,10 @@ static enum integrity_status evm_verify_hmac(struct dentry *dentry,
/* check value type */
switch (xattr_data->type) {
case EVM_XATTR_HMAC:
+ if (xattr_len != sizeof(struct evm_ima_xattr_data)) {
+ evm_status = INTEGRITY_FAIL;
+ goto out;
+ }
rc = evm_calc_hmac(dentry, xattr_name, xattr_value,
xattr_value_len, calc.digest);
if (rc)
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 389325ac6067..1fd9539a969d 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -130,6 +130,7 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
int xattr_len)
{
struct signature_v2_hdr *sig;
+ enum hash_algo ret;
if (!xattr_value || xattr_len < 2)
/* return default hash algo */
@@ -143,7 +144,9 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
return sig->hash_algo;
break;
case IMA_XATTR_DIGEST_NG:
- return xattr_value->digest[0];
+ ret = xattr_value->digest[0];
+ if (ret < HASH_ALGO__LAST)
+ return ret;
break;
case IMA_XATTR_DIGEST:
/* this is for backward compatibility */
@@ -384,14 +387,10 @@ int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
result = ima_protect_xattr(dentry, xattr_name, xattr_value,
xattr_value_len);
if (result == 1) {
- bool digsig;
-
if (!xattr_value_len || (xvalue->type >= IMA_XATTR_LAST))
return -EINVAL;
- digsig = (xvalue->type == EVM_IMA_XATTR_DIGSIG);
- if (!digsig && (ima_appraise & IMA_APPRAISE_ENFORCE))
- return -EPERM;
- ima_reset_appraise_flags(d_backing_inode(dentry), digsig);
+ ima_reset_appraise_flags(d_backing_inode(dentry),
+ (xvalue->type == EVM_IMA_XATTR_DIGSIG) ? 1 : 0);
result = 0;
}
return result;
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index c07a3844ea0a..3df46906492d 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -401,7 +401,7 @@ static int ima_release_policy(struct inode *inode, struct file *file)
const char *cause = valid_policy ? "completed" : "failed";
if ((file->f_flags & O_ACCMODE) == O_RDONLY)
- return 0;
+ return seq_release(inode, file);
if (valid_policy && ima_check_policy() < 0) {
cause = "failed";
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index 32912bd54ead..2ac1f41db5c0 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -115,7 +115,8 @@ int __init ima_init(void)
ima_used_chip = 1;
if (!ima_used_chip)
- pr_info("No TPM chip found, activating TPM-bypass!\n");
+ pr_info("No TPM chip found, activating TPM-bypass! (rc=%d)\n",
+ rc);
rc = integrity_init_keyring(INTEGRITY_KEYRING_IMA);
if (rc)
diff --git a/security/keys/Kconfig b/security/keys/Kconfig
index f826e8739023..d942c7c2bc0a 100644
--- a/security/keys/Kconfig
+++ b/security/keys/Kconfig
@@ -41,7 +41,7 @@ config BIG_KEYS
bool "Large payload keys"
depends on KEYS
depends on TMPFS
- select CRYPTO
+ depends on (CRYPTO_ANSI_CPRNG = y || CRYPTO_DRBG = y)
select CRYPTO_AES
select CRYPTO_ECB
select CRYPTO_RNG
diff --git a/security/keys/big_key.c b/security/keys/big_key.c
index c0b3030b5634..835c1ab30d01 100644
--- a/security/keys/big_key.c
+++ b/security/keys/big_key.c
@@ -9,6 +9,7 @@
* 2 of the Licence, or (at your option) any later version.
*/
+#define pr_fmt(fmt) "big_key: "fmt
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/file.h>
@@ -341,44 +342,48 @@ error:
*/
static int __init big_key_init(void)
{
- return register_key_type(&key_type_big_key);
-}
-
-/*
- * Initialize big_key crypto and RNG algorithms
- */
-static int __init big_key_crypto_init(void)
-{
- int ret = -EINVAL;
+ struct crypto_skcipher *cipher;
+ struct crypto_rng *rng;
+ int ret;
- /* init RNG */
- big_key_rng = crypto_alloc_rng(big_key_rng_name, 0, 0);
- if (IS_ERR(big_key_rng)) {
- big_key_rng = NULL;
- return -EFAULT;
+ rng = crypto_alloc_rng(big_key_rng_name, 0, 0);
+ if (IS_ERR(rng)) {
+ pr_err("Can't alloc rng: %ld\n", PTR_ERR(rng));
+ return PTR_ERR(rng);
}
+ big_key_rng = rng;
+
/* seed RNG */
- ret = crypto_rng_reset(big_key_rng, NULL, crypto_rng_seedsize(big_key_rng));
- if (ret)
- goto error;
+ ret = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng));
+ if (ret) {
+ pr_err("Can't reset rng: %d\n", ret);
+ goto error_rng;
+ }
/* init block cipher */
- big_key_skcipher = crypto_alloc_skcipher(big_key_alg_name,
- 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(big_key_skcipher)) {
- big_key_skcipher = NULL;
- ret = -EFAULT;
- goto error;
+ cipher = crypto_alloc_skcipher(big_key_alg_name, 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(cipher)) {
+ ret = PTR_ERR(cipher);
+ pr_err("Can't alloc crypto: %d\n", ret);
+ goto error_rng;
+ }
+
+ big_key_skcipher = cipher;
+
+ ret = register_key_type(&key_type_big_key);
+ if (ret < 0) {
+ pr_err("Can't register type: %d\n", ret);
+ goto error_cipher;
}
return 0;
-error:
+error_cipher:
+ crypto_free_skcipher(big_key_skcipher);
+error_rng:
crypto_free_rng(big_key_rng);
- big_key_rng = NULL;
return ret;
}
-device_initcall(big_key_init);
-late_initcall(big_key_crypto_init);
+late_initcall(big_key_init);
diff --git a/security/keys/proc.c b/security/keys/proc.c
index f0611a6368cd..b9f531c9e4fa 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -181,7 +181,7 @@ static int proc_keys_show(struct seq_file *m, void *v)
struct timespec now;
unsigned long timo;
key_ref_t key_ref, skey_ref;
- char xbuf[12];
+ char xbuf[16];
int rc;
struct keyring_search_context ctx = {
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 51fd30192c08..77abe2efacae 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -336,7 +336,6 @@ extern int smack_ptrace_rule;
extern struct smack_known smack_known_floor;
extern struct smack_known smack_known_hat;
extern struct smack_known smack_known_huh;
-extern struct smack_known smack_known_invalid;
extern struct smack_known smack_known_star;
extern struct smack_known smack_known_web;
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 23e5808a0970..356e3764cad9 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -36,11 +36,6 @@ struct smack_known smack_known_floor = {
.smk_secid = 5,
};
-struct smack_known smack_known_invalid = {
- .smk_known = "",
- .smk_secid = 6,
-};
-
struct smack_known smack_known_web = {
.smk_known = "@",
.smk_secid = 7,
@@ -615,7 +610,7 @@ struct smack_known *smack_from_secid(const u32 secid)
* of a secid that is not on the list.
*/
rcu_read_unlock();
- return &smack_known_invalid;
+ return &smack_known_huh;
}
/*
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 1cb060293505..4d90257d03ad 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -692,12 +692,12 @@ static int smack_parse_opts_str(char *options,
}
}
- opts->mnt_opts = kcalloc(NUM_SMK_MNT_OPTS, sizeof(char *), GFP_ATOMIC);
+ opts->mnt_opts = kcalloc(NUM_SMK_MNT_OPTS, sizeof(char *), GFP_KERNEL);
if (!opts->mnt_opts)
goto out_err;
opts->mnt_opts_flags = kcalloc(NUM_SMK_MNT_OPTS, sizeof(int),
- GFP_ATOMIC);
+ GFP_KERNEL);
if (!opts->mnt_opts_flags) {
kfree(opts->mnt_opts);
goto out_err;
@@ -769,6 +769,31 @@ static int smack_set_mnt_opts(struct super_block *sb,
if (sp->smk_flags & SMK_SB_INITIALIZED)
return 0;
+ if (!smack_privileged(CAP_MAC_ADMIN)) {
+ /*
+ * Unprivileged mounts don't get to specify Smack values.
+ */
+ if (num_opts)
+ return -EPERM;
+ /*
+ * Unprivileged mounts get root and default from the caller.
+ */
+ skp = smk_of_current();
+ sp->smk_root = skp;
+ sp->smk_default = skp;
+ /*
+ * For a handful of fs types with no user-controlled
+ * backing store it's okay to trust security labels
+ * in the filesystem. The rest are untrusted.
+ */
+ if (sb->s_user_ns != &init_user_ns &&
+ sb->s_magic != SYSFS_MAGIC && sb->s_magic != TMPFS_MAGIC &&
+ sb->s_magic != RAMFS_MAGIC) {
+ transmute = 1;
+ sp->smk_flags |= SMK_SB_UNTRUSTED;
+ }
+ }
+
sp->smk_flags |= SMK_SB_INITIALIZED;
for (i = 0; i < num_opts; i++) {
@@ -809,31 +834,6 @@ static int smack_set_mnt_opts(struct super_block *sb,
}
}
- if (!smack_privileged(CAP_MAC_ADMIN)) {
- /*
- * Unprivileged mounts don't get to specify Smack values.
- */
- if (num_opts)
- return -EPERM;
- /*
- * Unprivileged mounts get root and default from the caller.
- */
- skp = smk_of_current();
- sp->smk_root = skp;
- sp->smk_default = skp;
- /*
- * For a handful of fs types with no user-controlled
- * backing store it's okay to trust security labels
- * in the filesystem. The rest are untrusted.
- */
- if (sb->s_user_ns != &init_user_ns &&
- sb->s_magic != SYSFS_MAGIC && sb->s_magic != TMPFS_MAGIC &&
- sb->s_magic != RAMFS_MAGIC) {
- transmute = 1;
- sp->smk_flags |= SMK_SB_UNTRUSTED;
- }
- }
-
/*
* Initialize the root inode.
*/
@@ -1384,20 +1384,14 @@ static void smack_inode_post_setxattr(struct dentry *dentry, const char *name,
skp = smk_import_entry(value, size);
if (!IS_ERR(skp))
isp->smk_inode = skp;
- else
- isp->smk_inode = &smack_known_invalid;
} else if (strcmp(name, XATTR_NAME_SMACKEXEC) == 0) {
skp = smk_import_entry(value, size);
if (!IS_ERR(skp))
isp->smk_task = skp;
- else
- isp->smk_task = &smack_known_invalid;
} else if (strcmp(name, XATTR_NAME_SMACKMMAP) == 0) {
skp = smk_import_entry(value, size);
if (!IS_ERR(skp))
isp->smk_mmap = skp;
- else
- isp->smk_mmap = &smack_known_invalid;
}
return;
@@ -2023,6 +2017,8 @@ static int smack_cred_prepare(struct cred *new, const struct cred *old,
if (new_tsp == NULL)
return -ENOMEM;
+ new->security = new_tsp;
+
rc = smk_copy_rules(&new_tsp->smk_rules, &old_tsp->smk_rules, gfp);
if (rc != 0)
return rc;
@@ -2032,7 +2028,6 @@ static int smack_cred_prepare(struct cred *new, const struct cred *old,
if (rc != 0)
return rc;
- new->security = new_tsp;
return 0;
}
@@ -2067,12 +2062,8 @@ static void smack_cred_transfer(struct cred *new, const struct cred *old)
static int smack_kernel_act_as(struct cred *new, u32 secid)
{
struct task_smack *new_tsp = new->security;
- struct smack_known *skp = smack_from_secid(secid);
-
- if (skp == NULL)
- return -EINVAL;
- new_tsp->smk_task = skp;
+ new_tsp->smk_task = smack_from_secid(secid);
return 0;
}
@@ -2337,8 +2328,16 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
if (ssp == NULL)
return -ENOMEM;
- ssp->smk_in = skp;
- ssp->smk_out = skp;
+ /*
+ * Sockets created by kernel threads receive web label.
+ */
+ if (unlikely(current->flags & PF_KTHREAD)) {
+ ssp->smk_in = &smack_known_web;
+ ssp->smk_out = &smack_known_web;
+ } else {
+ ssp->smk_in = skp;
+ ssp->smk_out = skp;
+ }
ssp->smk_packet = NULL;
sk->sk_security = ssp;
@@ -2435,17 +2434,17 @@ static struct smack_known *smack_ipv6host_label(struct sockaddr_in6 *sip)
list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
/*
+ * If the label is NULL the entry has
+ * been renounced. Ignore it.
+ */
+ if (snp->smk_label == NULL)
+ continue;
+ /*
* we break after finding the first match because
* the list is sorted from longest to shortest mask
* so we have found the most specific match
*/
for (found = 1, i = 0; i < 8; i++) {
- /*
- * If the label is NULL the entry has
- * been renounced. Ignore it.
- */
- if (snp->smk_label == NULL)
- continue;
if ((sap->s6_addr16[i] & snp->smk_mask.s6_addr16[i]) !=
snp->smk_host.s6_addr16[i]) {
found = 0;
@@ -3661,10 +3660,11 @@ static int smack_setprocattr(struct task_struct *p, char *name,
return PTR_ERR(skp);
/*
- * No process is ever allowed the web ("@") label.
+ * No process is ever allowed the web ("@") label
+ * and the star ("*") label.
*/
- if (skp == &smack_known_web)
- return -EPERM;
+ if (skp == &smack_known_web || skp == &smack_known_star)
+ return -EINVAL;
if (!smack_privileged(CAP_MAC_ADMIN)) {
rc = -EPERM;
@@ -3884,21 +3884,11 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap,
return &smack_known_web;
return &smack_known_star;
}
- if ((sap->flags & NETLBL_SECATTR_SECID) != 0) {
+ if ((sap->flags & NETLBL_SECATTR_SECID) != 0)
/*
* Looks like a fallback, which gives us a secid.
*/
- skp = smack_from_secid(sap->attr.secid);
- /*
- * This has got to be a bug because it is
- * impossible to specify a fallback without
- * specifying the label, which will ensure
- * it has a secid, and the only way to get a
- * secid is from a fallback.
- */
- BUG_ON(skp == NULL);
- return skp;
- }
+ return smack_from_secid(sap->attr.secid);
/*
* Without guidance regarding the smack value
* for the packet fall back on the network
@@ -4761,7 +4751,6 @@ static __init void init_smack_known_list(void)
mutex_init(&smack_known_hat.smk_rules_lock);
mutex_init(&smack_known_floor.smk_rules_lock);
mutex_init(&smack_known_star.smk_rules_lock);
- mutex_init(&smack_known_invalid.smk_rules_lock);
mutex_init(&smack_known_web.smk_rules_lock);
/*
* Initialize rule lists
@@ -4770,7 +4759,6 @@ static __init void init_smack_known_list(void)
INIT_LIST_HEAD(&smack_known_hat.smk_rules);
INIT_LIST_HEAD(&smack_known_star.smk_rules);
INIT_LIST_HEAD(&smack_known_floor.smk_rules);
- INIT_LIST_HEAD(&smack_known_invalid.smk_rules);
INIT_LIST_HEAD(&smack_known_web.smk_rules);
/*
* Create the known labels list
@@ -4779,7 +4767,6 @@ static __init void init_smack_known_list(void)
smk_insert_entry(&smack_known_hat);
smk_insert_entry(&smack_known_star);
smk_insert_entry(&smack_known_floor);
- smk_insert_entry(&smack_known_invalid);
smk_insert_entry(&smack_known_web);
}
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 6492fe96cae4..13743a01b35b 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -2998,9 +2998,6 @@ static int __init init_smk_fs(void)
rc = smk_preset_netlabel(&smack_known_huh);
if (err == 0 && rc < 0)
err = rc;
- rc = smk_preset_netlabel(&smack_known_invalid);
- if (err == 0 && rc < 0)
- err = rc;
rc = smk_preset_netlabel(&smack_known_star);
if (err == 0 && rc < 0)
err = rc;
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-30 15:09:36 +0200