Merge tag 'integrity-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity

Pull integrity updates from Mimi Zohar:
 "Continuing IMA policy rule cleanup and validation in particular for
  measuring keys, adding/removing/updating informational and error
  messages (e.g. "ima_appraise" boot command line option), and other bug
  fixes (e.g. minimal data size validation before use, return code and
  NULL pointer checking)"

* tag 'integrity-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
  ima: Fix NULL pointer dereference in ima_file_hash
  evm: Check size of security.evm before using it
  ima: Remove semicolon at the end of ima_get_binary_runtime_size()
  ima: Don't ignore errors from crypto_shash_update()
  ima: Use kmemdup rather than kmalloc+memcpy
  integrity: include keyring name for unknown key request
  ima: limit secure boot feedback scope for appraise
  integrity: invalid kernel parameters feedback
  ima: add check for enforced appraise option
  integrity: Use current_uid() in integrity_audit_message()
  ima: Fail rule parsing when asymmetric key measurement isn't supportable
  ima: Pre-parse the list of keyrings in a KEY_CHECK rule

1 files changed, 19 insertions, 8 deletions

diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index b8848f53c8cc..3dd8c2e4314e 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -19,18 +19,29 @@
 static int __init default_appraise_setup(char *str)
 {
 #ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
-	if (arch_ima_get_secureboot()) {
-		pr_info("Secure boot enabled: ignoring ima_appraise=%s boot parameter option",
-			str);
-		return 1;
-	}
+	bool sb_state = arch_ima_get_secureboot();
+	int appraisal_state = ima_appraise;
 
 	if (strncmp(str, "off", 3) == 0)
-		ima_appraise = 0;
+		appraisal_state = 0;
 	else if (strncmp(str, "log", 3) == 0)
-		ima_appraise = IMA_APPRAISE_LOG;
+		appraisal_state = IMA_APPRAISE_LOG;
 	else if (strncmp(str, "fix", 3) == 0)
-		ima_appraise = IMA_APPRAISE_FIX;
+		appraisal_state = IMA_APPRAISE_FIX;
+	else if (strncmp(str, "enforce", 7) == 0)
+		appraisal_state = IMA_APPRAISE_ENFORCE;
+	else
+		pr_err("invalid \"%s\" appraise option", str);
+
+	/* If appraisal state was changed, but secure boot is enabled,
+	 * keep its default */
+	if (sb_state) {
+		if (!(appraisal_state & IMA_APPRAISE_ENFORCE))
+			pr_info("Secure boot enabled: ignoring ima_appraise=%s option",
+				str);
+	} else {
+		ima_appraise = appraisal_state;
+	}
 #endif
 	return 1;
 }