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-rw-r--r--security/integrity/digsig.c2
-rw-r--r--security/integrity/evm/evm_main.c18
-rw-r--r--security/integrity/iint.c3
-rw-r--r--security/integrity/ima/ima.h29
-rw-r--r--security/integrity/ima/ima_api.c20
-rw-r--r--security/integrity/ima/ima_appraise.c8
-rw-r--r--security/integrity/ima/ima_crypto.c2
-rw-r--r--security/integrity/ima/ima_fs.c4
-rw-r--r--security/integrity/ima/ima_init.c13
-rw-r--r--security/integrity/ima/ima_main.c5
-rw-r--r--security/integrity/ima/ima_policy.c124
-rw-r--r--security/integrity/ima/ima_template_lib.c74
-rw-r--r--security/integrity/ima/ima_template_lib.h22
-rw-r--r--security/integrity/integrity.h2
14 files changed, 200 insertions, 126 deletions
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 5e3bd72b299a..36fb6b527829 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -85,7 +85,7 @@ int __init integrity_init_keyring(const unsigned int id)
return err;
}
-int __init integrity_load_x509(const unsigned int id, char *path)
+int __init integrity_load_x509(const unsigned int id, const char *path)
{
key_ref_t key;
char *data;
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index 10f994307a04..1334e02ae8f4 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -296,6 +296,17 @@ static int evm_protect_xattr(struct dentry *dentry, const char *xattr_name,
iint = integrity_iint_find(d_backing_inode(dentry));
if (iint && (iint->flags & IMA_NEW_FILE))
return 0;
+
+ /* exception for pseudo filesystems */
+ if (dentry->d_inode->i_sb->s_magic == TMPFS_MAGIC
+ || dentry->d_inode->i_sb->s_magic == SYSFS_MAGIC)
+ return 0;
+
+ integrity_audit_msg(AUDIT_INTEGRITY_METADATA,
+ dentry->d_inode, dentry->d_name.name,
+ "update_metadata",
+ integrity_status_msg[evm_status],
+ -EPERM, 0);
}
out:
if (evm_status != INTEGRITY_PASS)
@@ -376,17 +387,16 @@ void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name,
* @xattr_name: pointer to the affected extended attribute name
*
* Update the HMAC stored in 'security.evm' to reflect removal of the xattr.
+ *
+ * No need to take the i_mutex lock here, as this function is called from
+ * vfs_removexattr() which takes the i_mutex.
*/
void evm_inode_post_removexattr(struct dentry *dentry, const char *xattr_name)
{
- struct inode *inode = d_backing_inode(dentry);
-
if (!evm_initialized || !evm_protected_xattr(xattr_name))
return;
- mutex_lock(&inode->i_mutex);
evm_update_evmxattr(dentry, xattr_name, NULL, 0);
- mutex_unlock(&inode->i_mutex);
}
/**
diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index dbb6d141c3db..3d2f5b45c8cb 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -213,6 +213,9 @@ int __init integrity_read_file(const char *path, char **data)
char *buf;
int rc = -EINVAL;
+ if (!path || !*path)
+ return -EINVAL;
+
file = filp_open(path, O_RDONLY, 0);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 8ee997dff139..e2a60c30df44 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -52,6 +52,16 @@ extern int ima_used_chip;
extern int ima_hash_algo;
extern int ima_appraise;
+/* IMA event related data */
+struct ima_event_data {
+ struct integrity_iint_cache *iint;
+ struct file *file;
+ const unsigned char *filename;
+ struct evm_ima_xattr_data *xattr_value;
+ int xattr_len;
+ const char *violation;
+};
+
/* IMA template field data definition */
struct ima_field_data {
u8 *data;
@@ -61,12 +71,10 @@ struct ima_field_data {
/* IMA template field definition */
struct ima_template_field {
const char field_id[IMA_TEMPLATE_FIELD_ID_MAX_LEN];
- int (*field_init) (struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value,
- int xattr_len, struct ima_field_data *field_data);
- void (*field_show) (struct seq_file *m, enum ima_show_type show,
- struct ima_field_data *field_data);
+ int (*field_init)(struct ima_event_data *event_data,
+ struct ima_field_data *field_data);
+ void (*field_show)(struct seq_file *m, enum ima_show_type show,
+ struct ima_field_data *field_data);
};
/* IMA template descriptor definition */
@@ -103,10 +111,11 @@ int ima_calc_field_array_hash(struct ima_field_data *field_data,
struct ima_digest_data *hash);
int __init ima_calc_boot_aggregate(struct ima_digest_data *hash);
void ima_add_violation(struct file *file, const unsigned char *filename,
+ struct integrity_iint_cache *iint,
const char *op, const char *cause);
int ima_init_crypto(void);
void ima_putc(struct seq_file *m, void *data, int datalen);
-void ima_print_digest(struct seq_file *m, u8 *digest, int size);
+void ima_print_digest(struct seq_file *m, u8 *digest, u32 size);
struct ima_template_desc *ima_template_desc_current(void);
int ima_init_template(void);
@@ -140,10 +149,8 @@ void ima_store_measurement(struct integrity_iint_cache *iint, struct file *file,
int xattr_len);
void ima_audit_measurement(struct integrity_iint_cache *iint,
const unsigned char *filename);
-int ima_alloc_init_template(struct integrity_iint_cache *iint,
- struct file *file, const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value,
- int xattr_len, struct ima_template_entry **entry);
+int ima_alloc_init_template(struct ima_event_data *event_data,
+ struct ima_template_entry **entry);
int ima_store_template(struct ima_template_entry *entry, int violation,
struct inode *inode, const unsigned char *filename);
void ima_free_template_entry(struct ima_template_entry *entry);
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index b8a27c5052d4..1d950fbb2aec 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -37,10 +37,8 @@ void ima_free_template_entry(struct ima_template_entry *entry)
/*
* ima_alloc_init_template - create and initialize a new template entry
*/
-int ima_alloc_init_template(struct integrity_iint_cache *iint,
- struct file *file, const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value,
- int xattr_len, struct ima_template_entry **entry)
+int ima_alloc_init_template(struct ima_event_data *event_data,
+ struct ima_template_entry **entry)
{
struct ima_template_desc *template_desc = ima_template_desc_current();
int i, result = 0;
@@ -55,8 +53,7 @@ int ima_alloc_init_template(struct integrity_iint_cache *iint,
struct ima_template_field *field = template_desc->fields[i];
u32 len;
- result = field->field_init(iint, file, filename,
- xattr_value, xattr_len,
+ result = field->field_init(event_data,
&((*entry)->template_data[i]));
if (result != 0)
goto out;
@@ -129,18 +126,20 @@ int ima_store_template(struct ima_template_entry *entry,
* value is invalidated.
*/
void ima_add_violation(struct file *file, const unsigned char *filename,
+ struct integrity_iint_cache *iint,
const char *op, const char *cause)
{
struct ima_template_entry *entry;
struct inode *inode = file_inode(file);
+ struct ima_event_data event_data = {iint, file, filename, NULL, 0,
+ cause};
int violation = 1;
int result;
/* can overflow, only indicator */
atomic_long_inc(&ima_htable.violations);
- result = ima_alloc_init_template(NULL, file, filename,
- NULL, 0, &entry);
+ result = ima_alloc_init_template(&event_data, &entry);
if (result < 0) {
result = -ENOMEM;
goto err_out;
@@ -267,13 +266,14 @@ void ima_store_measurement(struct integrity_iint_cache *iint,
int result = -ENOMEM;
struct inode *inode = file_inode(file);
struct ima_template_entry *entry;
+ struct ima_event_data event_data = {iint, file, filename, xattr_value,
+ xattr_len, NULL};
int violation = 0;
if (iint->flags & IMA_MEASURED)
return;
- result = ima_alloc_init_template(iint, file, filename,
- xattr_value, xattr_len, &entry);
+ result = ima_alloc_init_template(&event_data, &entry);
if (result < 0) {
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
op, audit_cause, result, 0);
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 4df493e4b3c9..1873b5536f80 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -378,10 +378,14 @@ 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;
- ima_reset_appraise_flags(d_backing_inode(dentry),
- (xvalue->type == EVM_IMA_XATTR_DIGSIG) ? 1 : 0);
+ 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);
result = 0;
}
return result;
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index 686355fea7fd..e24121afb2f2 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -55,7 +55,7 @@ static int param_set_bufsize(const char *val, const struct kernel_param *kp)
return 0;
}
-static struct kernel_param_ops param_ops_bufsize = {
+static const struct kernel_param_ops param_ops_bufsize = {
.set = param_set_bufsize,
.get = param_get_uint,
};
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 461215e5fd31..816d175da79a 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -190,9 +190,9 @@ static const struct file_operations ima_measurements_ops = {
.release = seq_release,
};
-void ima_print_digest(struct seq_file *m, u8 *digest, int size)
+void ima_print_digest(struct seq_file *m, u8 *digest, u32 size)
{
- int i;
+ u32 i;
for (i = 0; i < size; i++)
seq_printf(m, "%02x", *(digest + i));
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index 5e4c29d174ee..e600cadd231c 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -24,12 +24,6 @@
#include <crypto/hash_info.h>
#include "ima.h"
-#ifdef CONFIG_IMA_X509_PATH
-#define IMA_X509_PATH CONFIG_IMA_X509_PATH
-#else
-#define IMA_X509_PATH "/etc/keys/x509_ima.der"
-#endif
-
/* name for boot aggregate entry */
static const char *boot_aggregate_name = "boot_aggregate";
int ima_used_chip;
@@ -55,6 +49,8 @@ static int __init ima_add_boot_aggregate(void)
const char *audit_cause = "ENOMEM";
struct ima_template_entry *entry;
struct integrity_iint_cache tmp_iint, *iint = &tmp_iint;
+ struct ima_event_data event_data = {iint, NULL, boot_aggregate_name,
+ NULL, 0, NULL};
int result = -ENOMEM;
int violation = 0;
struct {
@@ -76,8 +72,7 @@ static int __init ima_add_boot_aggregate(void)
}
}
- result = ima_alloc_init_template(iint, NULL, boot_aggregate_name,
- NULL, 0, &entry);
+ result = ima_alloc_init_template(&event_data, &entry);
if (result < 0) {
audit_cause = "alloc_entry";
goto err_out;
@@ -103,7 +98,7 @@ void __init ima_load_x509(void)
int unset_flags = ima_policy_flag & IMA_APPRAISE;
ima_policy_flag &= ~unset_flags;
- integrity_load_x509(INTEGRITY_KEYRING_IMA, IMA_X509_PATH);
+ integrity_load_x509(INTEGRITY_KEYRING_IMA, CONFIG_IMA_X509_PATH);
ima_policy_flag |= unset_flags;
}
#endif
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index eeee00dce729..c21f09bf8b99 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -106,9 +106,10 @@ static void ima_rdwr_violation_check(struct file *file,
*pathname = ima_d_path(&file->f_path, pathbuf);
if (send_tomtou)
- ima_add_violation(file, *pathname, "invalid_pcr", "ToMToU");
+ ima_add_violation(file, *pathname, iint,
+ "invalid_pcr", "ToMToU");
if (send_writers)
- ima_add_violation(file, *pathname,
+ ima_add_violation(file, *pathname, iint,
"invalid_pcr", "open_writers");
}
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index d1eefb9d65fb..3997e206f82d 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -27,6 +27,8 @@
#define IMA_UID 0x0008
#define IMA_FOWNER 0x0010
#define IMA_FSUUID 0x0020
+#define IMA_INMASK 0x0040
+#define IMA_EUID 0x0080
#define UNKNOWN 0
#define MEASURE 0x0001 /* same as IMA_MEASURE */
@@ -42,6 +44,8 @@ enum lsm_rule_types { LSM_OBJ_USER, LSM_OBJ_ROLE, LSM_OBJ_TYPE,
LSM_SUBJ_USER, LSM_SUBJ_ROLE, LSM_SUBJ_TYPE
};
+enum policy_types { ORIGINAL_TCB = 1, DEFAULT_TCB };
+
struct ima_rule_entry {
struct list_head list;
int action;
@@ -70,7 +74,7 @@ struct ima_rule_entry {
* normal users can easily run the machine out of memory simply building
* and running executables.
*/
-static struct ima_rule_entry default_rules[] = {
+static struct ima_rule_entry dont_measure_rules[] = {
{.action = DONT_MEASURE, .fsmagic = PROC_SUPER_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_MEASURE, .fsmagic = SYSFS_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_MEASURE, .fsmagic = DEBUGFS_MAGIC, .flags = IMA_FSMAGIC},
@@ -79,12 +83,31 @@ static struct ima_rule_entry default_rules[] = {
{.action = DONT_MEASURE, .fsmagic = BINFMTFS_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_MEASURE, .fsmagic = SECURITYFS_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_MEASURE, .fsmagic = SELINUX_MAGIC, .flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE, .fsmagic = CGROUP_SUPER_MAGIC,
+ .flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE, .fsmagic = NSFS_MAGIC, .flags = IMA_FSMAGIC}
+};
+
+static struct ima_rule_entry original_measurement_rules[] = {
{.action = MEASURE, .func = MMAP_CHECK, .mask = MAY_EXEC,
.flags = IMA_FUNC | IMA_MASK},
{.action = MEASURE, .func = BPRM_CHECK, .mask = MAY_EXEC,
.flags = IMA_FUNC | IMA_MASK},
- {.action = MEASURE, .func = FILE_CHECK, .mask = MAY_READ, .uid = GLOBAL_ROOT_UID,
- .flags = IMA_FUNC | IMA_MASK | IMA_UID},
+ {.action = MEASURE, .func = FILE_CHECK, .mask = MAY_READ,
+ .uid = GLOBAL_ROOT_UID, .flags = IMA_FUNC | IMA_MASK | IMA_UID},
+ {.action = MEASURE, .func = MODULE_CHECK, .flags = IMA_FUNC},
+ {.action = MEASURE, .func = FIRMWARE_CHECK, .flags = IMA_FUNC},
+};
+
+static struct ima_rule_entry default_measurement_rules[] = {
+ {.action = MEASURE, .func = MMAP_CHECK, .mask = MAY_EXEC,
+ .flags = IMA_FUNC | IMA_MASK},
+ {.action = MEASURE, .func = BPRM_CHECK, .mask = MAY_EXEC,
+ .flags = IMA_FUNC | IMA_MASK},
+ {.action = MEASURE, .func = FILE_CHECK, .mask = MAY_READ,
+ .uid = GLOBAL_ROOT_UID, .flags = IMA_FUNC | IMA_INMASK | IMA_EUID},
+ {.action = MEASURE, .func = FILE_CHECK, .mask = MAY_READ,
+ .uid = GLOBAL_ROOT_UID, .flags = IMA_FUNC | IMA_INMASK | IMA_UID},
{.action = MEASURE, .func = MODULE_CHECK, .flags = IMA_FUNC},
{.action = MEASURE, .func = FIRMWARE_CHECK, .flags = IMA_FUNC},
};
@@ -99,6 +122,7 @@ static struct ima_rule_entry default_appraise_rules[] = {
{.action = DONT_APPRAISE, .fsmagic = BINFMTFS_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_APPRAISE, .fsmagic = SECURITYFS_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_APPRAISE, .fsmagic = SELINUX_MAGIC, .flags = IMA_FSMAGIC},
+ {.action = DONT_APPRAISE, .fsmagic = NSFS_MAGIC, .flags = IMA_FSMAGIC},
{.action = DONT_APPRAISE, .fsmagic = CGROUP_SUPER_MAGIC, .flags = IMA_FSMAGIC},
#ifndef CONFIG_IMA_APPRAISE_SIGNED_INIT
{.action = APPRAISE, .fowner = GLOBAL_ROOT_UID, .flags = IMA_FOWNER},
@@ -115,14 +139,29 @@ static struct list_head *ima_rules;
static DEFINE_MUTEX(ima_rules_mutex);
-static bool ima_use_tcb __initdata;
+static int ima_policy __initdata;
static int __init default_measure_policy_setup(char *str)
{
- ima_use_tcb = 1;
+ if (ima_policy)
+ return 1;
+
+ ima_policy = ORIGINAL_TCB;
return 1;
}
__setup("ima_tcb", default_measure_policy_setup);
+static int __init policy_setup(char *str)
+{
+ if (ima_policy)
+ return 1;
+
+ if (strcmp(str, "tcb") == 0)
+ ima_policy = DEFAULT_TCB;
+
+ return 1;
+}
+__setup("ima_policy=", policy_setup);
+
static bool ima_use_appraise_tcb __initdata;
static int __init default_appraise_policy_setup(char *str)
{
@@ -182,6 +221,9 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
if ((rule->flags & IMA_MASK) &&
(rule->mask != mask && func != POST_SETATTR))
return false;
+ if ((rule->flags & IMA_INMASK) &&
+ (!(rule->mask & mask) && func != POST_SETATTR))
+ return false;
if ((rule->flags & IMA_FSMAGIC)
&& rule->fsmagic != inode->i_sb->s_magic)
return false;
@@ -190,6 +232,16 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
return false;
if ((rule->flags & IMA_UID) && !uid_eq(rule->uid, cred->uid))
return false;
+ if (rule->flags & IMA_EUID) {
+ if (has_capability_noaudit(current, CAP_SETUID)) {
+ if (!uid_eq(rule->uid, cred->euid)
+ && !uid_eq(rule->uid, cred->suid)
+ && !uid_eq(rule->uid, cred->uid))
+ return false;
+ } else if (!uid_eq(rule->uid, cred->euid))
+ return false;
+ }
+
if ((rule->flags & IMA_FOWNER) && !uid_eq(rule->fowner, inode->i_uid))
return false;
for (i = 0; i < MAX_LSM_RULES; i++) {
@@ -333,21 +385,31 @@ void __init ima_init_policy(void)
{
int i, measure_entries, appraise_entries;
- /* if !ima_use_tcb set entries = 0 so we load NO default rules */
- measure_entries = ima_use_tcb ? ARRAY_SIZE(default_rules) : 0;
+ /* if !ima_policy set entries = 0 so we load NO default rules */
+ measure_entries = ima_policy ? ARRAY_SIZE(dont_measure_rules) : 0;
appraise_entries = ima_use_appraise_tcb ?
ARRAY_SIZE(default_appraise_rules) : 0;
- for (i = 0; i < measure_entries + appraise_entries; i++) {
- if (i < measure_entries)
- list_add_tail(&default_rules[i].list,
- &ima_default_rules);
- else {
- int j = i - measure_entries;
+ for (i = 0; i < measure_entries; i++)
+ list_add_tail(&dont_measure_rules[i].list, &ima_default_rules);
- list_add_tail(&default_appraise_rules[j].list,
+ switch (ima_policy) {
+ case ORIGINAL_TCB:
+ for (i = 0; i < ARRAY_SIZE(original_measurement_rules); i++)
+ list_add_tail(&original_measurement_rules[i].list,
&ima_default_rules);
- }
+ break;
+ case DEFAULT_TCB:
+ for (i = 0; i < ARRAY_SIZE(default_measurement_rules); i++)
+ list_add_tail(&default_measurement_rules[i].list,
+ &ima_default_rules);
+ default:
+ break;
+ }
+
+ for (i = 0; i < appraise_entries; i++) {
+ list_add_tail(&default_appraise_rules[i].list,
+ &ima_default_rules);
}
ima_rules = &ima_default_rules;
@@ -373,7 +435,8 @@ enum {
Opt_audit,
Opt_obj_user, Opt_obj_role, Opt_obj_type,
Opt_subj_user, Opt_subj_role, Opt_subj_type,
- Opt_func, Opt_mask, Opt_fsmagic, Opt_uid, Opt_fowner,
+ Opt_func, Opt_mask, Opt_fsmagic,
+ Opt_uid, Opt_euid, Opt_fowner,
Opt_appraise_type, Opt_fsuuid, Opt_permit_directio
};
@@ -394,6 +457,7 @@ static match_table_t policy_tokens = {
{Opt_fsmagic, "fsmagic=%s"},
{Opt_fsuuid, "fsuuid=%s"},
{Opt_uid, "uid=%s"},
+ {Opt_euid, "euid=%s"},
{Opt_fowner, "fowner=%s"},
{Opt_appraise_type, "appraise_type=%s"},
{Opt_permit_directio, "permit_directio"},
@@ -435,6 +499,7 @@ static void ima_log_string(struct audit_buffer *ab, char *key, char *value)
static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
{
struct audit_buffer *ab;
+ char *from;
char *p;
int result = 0;
@@ -525,18 +590,23 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
if (entry->mask)
result = -EINVAL;
- if ((strcmp(args[0].from, "MAY_EXEC")) == 0)
+ from = args[0].from;
+ if (*from == '^')
+ from++;
+
+ if ((strcmp(from, "MAY_EXEC")) == 0)
entry->mask = MAY_EXEC;
- else if (strcmp(args[0].from, "MAY_WRITE") == 0)
+ else if (strcmp(from, "MAY_WRITE") == 0)
entry->mask = MAY_WRITE;
- else if (strcmp(args[0].from, "MAY_READ") == 0)
+ else if (strcmp(from, "MAY_READ") == 0)
entry->mask = MAY_READ;
- else if (strcmp(args[0].from, "MAY_APPEND") == 0)
+ else if (strcmp(from, "MAY_APPEND") == 0)
entry->mask = MAY_APPEND;
else
result = -EINVAL;
if (!result)
- entry->flags |= IMA_MASK;
+ entry->flags |= (*args[0].from == '^')
+ ? IMA_INMASK : IMA_MASK;
break;
case Opt_fsmagic:
ima_log_string(ab, "fsmagic", args[0].from);
@@ -566,6 +636,9 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
break;
case Opt_uid:
ima_log_string(ab, "uid", args[0].from);
+ case Opt_euid:
+ if (token == Opt_euid)
+ ima_log_string(ab, "euid", args[0].from);
if (uid_valid(entry->uid)) {
result = -EINVAL;
@@ -574,11 +647,14 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
result = kstrtoul(args[0].from, 10, &lnum);
if (!result) {
- entry->uid = make_kuid(current_user_ns(), (uid_t)lnum);
- if (!uid_valid(entry->uid) || (((uid_t)lnum) != lnum))
+ entry->uid = make_kuid(current_user_ns(),
+ (uid_t) lnum);
+ if (!uid_valid(entry->uid) ||
+ (uid_t)lnum != lnum)
result = -EINVAL;
else
- entry->flags |= IMA_UID;
+ entry->flags |= (token == Opt_uid)
+ ? IMA_UID : IMA_EUID;
}
break;
case Opt_fowner:
diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c
index bcfc36cbde6a..2934e3d377f1 100644
--- a/security/integrity/ima/ima_template_lib.c
+++ b/security/integrity/ima/ima_template_lib.c
@@ -70,7 +70,8 @@ static void ima_show_template_data_ascii(struct seq_file *m,
enum data_formats datafmt,
struct ima_field_data *field_data)
{
- u8 *buf_ptr = field_data->data, buflen = field_data->len;
+ u8 *buf_ptr = field_data->data;
+ u32 buflen = field_data->len;
switch (datafmt) {
case DATA_FMT_DIGEST_WITH_ALGO:
@@ -195,9 +196,7 @@ static int ima_eventdigest_init_common(u8 *digest, u32 digestsize, u8 hash_algo,
/*
* This function writes the digest of an event (with size limit).
*/
-int ima_eventdigest_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventdigest_init(struct ima_event_data *event_data,
struct ima_field_data *field_data)
{
struct {
@@ -211,25 +210,25 @@ int ima_eventdigest_init(struct integrity_iint_cache *iint, struct file *file,
memset(&hash, 0, sizeof(hash));
- if (!iint) /* recording a violation. */
+ if (event_data->violation) /* recording a violation. */
goto out;
- if (ima_template_hash_algo_allowed(iint->ima_hash->algo)) {
- cur_digest = iint->ima_hash->digest;
- cur_digestsize = iint->ima_hash->length;
+ if (ima_template_hash_algo_allowed(event_data->iint->ima_hash->algo)) {
+ cur_digest = event_data->iint->ima_hash->digest;
+ cur_digestsize = event_data->iint->ima_hash->length;
goto out;
}
- if (!file) /* missing info to re-calculate the digest */
+ if (!event_data->file) /* missing info to re-calculate the digest */
return -EINVAL;
- inode = file_inode(file);
+ inode = file_inode(event_data->file);
hash.hdr.algo = ima_template_hash_algo_allowed(ima_hash_algo) ?
ima_hash_algo : HASH_ALGO_SHA1;
- result = ima_calc_file_hash(file, &hash.hdr);
+ result = ima_calc_file_hash(event_data->file, &hash.hdr);
if (result) {
integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
- filename, "collect_data",
+ event_data->filename, "collect_data",
"failed", result, 0);
return result;
}
@@ -243,48 +242,43 @@ out:
/*
* This function writes the digest of an event (without size limit).
*/
-int ima_eventdigest_ng_init(struct integrity_iint_cache *iint,
- struct file *file, const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value,
- int xattr_len, struct ima_field_data *field_data)
+int ima_eventdigest_ng_init(struct ima_event_data *event_data,
+ struct ima_field_data *field_data)
{
u8 *cur_digest = NULL, hash_algo = HASH_ALGO_SHA1;
u32 cur_digestsize = 0;
- /* If iint is NULL, we are recording a violation. */
- if (!iint)
+ if (event_data->violation) /* recording a violation. */
goto out;
- cur_digest = iint->ima_hash->digest;
- cur_digestsize = iint->ima_hash->length;
+ cur_digest = event_data->iint->ima_hash->digest;
+ cur_digestsize = event_data->iint->ima_hash->length;
- hash_algo = iint->ima_hash->algo;
+ hash_algo = event_data->iint->ima_hash->algo;
out:
return ima_eventdigest_init_common(cur_digest, cur_digestsize,
hash_algo, field_data);
}
-static int ima_eventname_init_common(struct integrity_iint_cache *iint,
- struct file *file,
- const unsigned char *filename,
+static int ima_eventname_init_common(struct ima_event_data *event_data,
struct ima_field_data *field_data,
bool size_limit)
{
const char *cur_filename = NULL;
u32 cur_filename_len = 0;
- BUG_ON(filename == NULL && file == NULL);
+ BUG_ON(event_data->filename == NULL && event_data->file == NULL);
- if (filename) {
- cur_filename = filename;
- cur_filename_len = strlen(filename);
+ if (event_data->filename) {
+ cur_filename = event_data->filename;
+ cur_filename_len = strlen(event_data->filename);
if (!size_limit || cur_filename_len <= IMA_EVENT_NAME_LEN_MAX)
goto out;
}
- if (file) {
- cur_filename = file->f_path.dentry->d_name.name;
+ if (event_data->file) {
+ cur_filename = event_data->file->f_path.dentry->d_name.name;
cur_filename_len = strlen(cur_filename);
} else
/*
@@ -300,36 +294,30 @@ out:
/*
* This function writes the name of an event (with size limit).
*/
-int ima_eventname_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventname_init(struct ima_event_data *event_data,
struct ima_field_data *field_data)
{
- return ima_eventname_init_common(iint, file, filename,
- field_data, true);
+ return ima_eventname_init_common(event_data, field_data, true);
}
/*
* This function writes the name of an event (without size limit).
*/
-int ima_eventname_ng_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventname_ng_init(struct ima_event_data *event_data,
struct ima_field_data *field_data)
{
- return ima_eventname_init_common(iint, file, filename,
- field_data, false);
+ return ima_eventname_init_common(event_data, field_data, false);
}
/*
* ima_eventsig_init - include the file signature as part of the template data
*/
-int ima_eventsig_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventsig_init(struct ima_event_data *event_data,
struct ima_field_data *field_data)
{
enum data_formats fmt = DATA_FMT_HEX;
+ struct evm_ima_xattr_data *xattr_value = event_data->xattr_value;
+ int xattr_len = event_data->xattr_len;
int rc = 0;
if ((!xattr_value) || (xattr_value->type != EVM_IMA_XATTR_DIGSIG))
diff --git a/security/integrity/ima/ima_template_lib.h b/security/integrity/ima/ima_template_lib.h
index 63f6b52cb1c2..c344530c1d69 100644
--- a/security/integrity/ima/ima_template_lib.h
+++ b/security/integrity/ima/ima_template_lib.h
@@ -26,24 +26,14 @@ void ima_show_template_string(struct seq_file *m, enum ima_show_type show,
struct ima_field_data *field_data);
void ima_show_template_sig(struct seq_file *m, enum ima_show_type show,
struct ima_field_data *field_data);
-int ima_eventdigest_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventdigest_init(struct ima_event_data *event_data,
struct ima_field_data *field_data);
-int ima_eventname_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventname_init(struct ima_event_data *event_data,
struct ima_field_data *field_data);
-int ima_eventdigest_ng_init(struct integrity_iint_cache *iint,
- struct file *file, const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value,
- int xattr_len, struct ima_field_data *field_data);
-int ima_eventname_ng_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventdigest_ng_init(struct ima_event_data *event_data,
+ struct ima_field_data *field_data);
+int ima_eventname_ng_init(struct ima_event_data *event_data,
struct ima_field_data *field_data);
-int ima_eventsig_init(struct integrity_iint_cache *iint, struct file *file,
- const unsigned char *filename,
- struct evm_ima_xattr_data *xattr_value, int xattr_len,
+int ima_eventsig_init(struct ima_event_data *event_data,
struct ima_field_data *field_data);
#endif /* __LINUX_IMA_TEMPLATE_LIB_H */
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index 0fc9519fefa9..9c6168709d3b 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -135,7 +135,7 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
const char *digest, int digestlen);
int __init integrity_init_keyring(const unsigned int id);
-int __init integrity_load_x509(const unsigned int id, char *path);
+int __init integrity_load_x509(const unsigned int id, const char *path);
#else
static inline int integrity_digsig_verify(const unsigned int id,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.