Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index a02c5ac..610759f 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -1,18 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2008 IBM Corporation
*
* Author: Mimi Zohar <zohar@us.ibm.com>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
- *
* File: ima_api.c
* Implements must_appraise_or_measure, collect_measurement,
* appraise_measurement, store_measurement and store_template.
*/
-#include <linux/module.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/fs.h>
@@ -39,19 +34,26 @@
* ima_alloc_init_template - create and initialize a new template entry
*/
int ima_alloc_init_template(struct ima_event_data *event_data,
- struct ima_template_entry **entry)
+ struct ima_template_entry **entry,
+ struct ima_template_desc *desc)
{
- struct ima_template_desc *template_desc = ima_template_desc_current();
+ struct ima_template_desc *template_desc;
int i, result = 0;
- *entry = kzalloc(sizeof(**entry) + template_desc->num_fields *
- sizeof(struct ima_field_data), GFP_NOFS);
+ if (desc)
+ template_desc = desc;
+ else
+ template_desc = ima_template_desc_current();
+
+ *entry = kzalloc(struct_size(*entry, template_data,
+ template_desc->num_fields), GFP_NOFS);
if (!*entry)
return -ENOMEM;
(*entry)->template_desc = template_desc;
for (i = 0; i < template_desc->num_fields; i++) {
- struct ima_template_field *field = template_desc->fields[i];
+ const struct ima_template_field *field =
+ template_desc->fields[i];
u32 len;
result = field->field_init(event_data,
@@ -133,15 +135,17 @@
{
struct ima_template_entry *entry;
struct inode *inode = file_inode(file);
- struct ima_event_data event_data = {iint, file, filename, NULL, 0,
- cause};
+ struct ima_event_data event_data = { .iint = iint,
+ .file = file,
+ .filename = filename,
+ .violation = cause };
int violation = 1;
int result;
/* can overflow, only indicator */
atomic_long_inc(&ima_htable.violations);
- result = ima_alloc_init_template(&event_data, &entry);
+ result = ima_alloc_init_template(&event_data, &entry, NULL);
if (result < 0) {
result = -ENOMEM;
goto err_out;
@@ -164,11 +168,13 @@
* MAY_APPEND)
* @func: caller identifier
* @pcr: pointer filled in if matched measure policy sets pcr=
+ * @template_desc: pointer filled in if matched measure policy sets template=
*
* The policy is defined in terms of keypairs:
* subj=, obj=, type=, func=, mask=, fsmagic=
* subj,obj, and type: are LSM specific.
* func: FILE_CHECK | BPRM_CHECK | CREDS_CHECK | MMAP_CHECK | MODULE_CHECK
+ * | KEXEC_CMDLINE
* mask: contains the permission mask
* fsmagic: hex value
*
@@ -176,13 +182,15 @@
*
*/
int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid,
- int mask, enum ima_hooks func, int *pcr)
+ int mask, enum ima_hooks func, int *pcr,
+ struct ima_template_desc **template_desc)
{
int flags = IMA_MEASURE | IMA_AUDIT | IMA_APPRAISE | IMA_HASH;
flags &= ima_policy_flag;
- return ima_match_policy(inode, cred, secid, func, mask, flags, pcr);
+ return ima_match_policy(inode, cred, secid, func, mask, flags, pcr,
+ template_desc);
}
/*
@@ -197,7 +205,7 @@
*/
int ima_collect_measurement(struct integrity_iint_cache *iint,
struct file *file, void *buf, loff_t size,
- enum hash_algo algo)
+ enum hash_algo algo, struct modsig *modsig)
{
const char *audit_cause = "failed";
struct inode *inode = file_inode(file);
@@ -211,6 +219,14 @@
char digest[IMA_MAX_DIGEST_SIZE];
} hash;
+ /*
+ * Always collect the modsig, because IMA might have already collected
+ * the file digest without collecting the modsig in a previous
+ * measurement rule.
+ */
+ if (modsig)
+ ima_collect_modsig(modsig, buf, size);
+
if (iint->flags & IMA_COLLECTED)
goto out;
@@ -277,21 +293,32 @@
void ima_store_measurement(struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
- int xattr_len, int pcr)
+ int xattr_len, const struct modsig *modsig, int pcr,
+ struct ima_template_desc *template_desc)
{
static const char op[] = "add_template_measure";
static const char audit_cause[] = "ENOMEM";
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};
+ struct ima_event_data event_data = { .iint = iint,
+ .file = file,
+ .filename = filename,
+ .xattr_value = xattr_value,
+ .xattr_len = xattr_len,
+ .modsig = modsig };
int violation = 0;
- if (iint->measured_pcrs & (0x1 << pcr))
+ /*
+ * We still need to store the measurement in the case of MODSIG because
+ * we only have its contents to put in the list at the time of
+ * appraisal, but a file measurement from earlier might already exist in
+ * the measurement list.
+ */
+ if (iint->measured_pcrs & (0x1 << pcr) && !modsig)
return;
- result = ima_alloc_init_template(&event_data, &entry);
+ result = ima_alloc_init_template(&event_data, &entry, template_desc);
if (result < 0) {
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
op, audit_cause, result, 0);
@@ -335,7 +362,7 @@
audit_log_untrustedstring(ab, filename);
audit_log_format(ab, " hash=\"%s:%s\"", algo_name, hash);
- audit_log_task_info(ab, current);
+ audit_log_task_info(ab);
audit_log_end(ab);
iint->flags |= IMA_AUDITED;