Subject: [PATCH v5 09/18] ima: Don't pass xattr value to EVM xattr verification.

From: Thiago Jung Bauermann <[email-masked]>
Date: Tue, 17 Oct 2017 22:53:22 -0200

The patch implementing modsig support will retry verifying the xattr
signature if the modsig verification fails, and if we have already passed
the modsig as the xattr_value we'll have problems if we pass the xattr sig
in the second call to evm_verifyxattr.

Since this is an optimization and not actually required, just don't do it.

Suggested-by: Mimi Zohar <[email-masked]>
Signed-off-by: Thiago Jung Bauermann <[email-masked]>
---
 security/integrity/ima/ima_appraise.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 091977c8ec40..58e147049e98 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -229,7 +229,7 @@ int ima_appraise_measurement(enum ima_hooks func,
 		goto out;
 	}
 
-	status = evm_verifyxattr(dentry, XATTR_NAME_IMA, xattr_value, rc, iint);
+	status = evm_verifyxattr(dentry, XATTR_NAME_IMA, NULL, 0, iint);
 	switch (status) {
 	case INTEGRITY_PASS:
 	case INTEGRITY_UNKNOWN: