linux-kernel - [PATCH v2 12/12] ima: Don't remove security.ima if file must not be appraised

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Date:   Fri, 4 Sep 2020 11:26:43 +0200
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     <zohar@...ux.ibm.com>, <mjg59@...gle.com>
CC:     <linux-integrity@...r.kernel.org>,
        <linux-security-module@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <silviu.vlasceanu@...wei.com>,
        Roberto Sassu <roberto.sassu@...wei.com>
Subject: [PATCH v2 12/12] ima: Don't remove security.ima if file must not be appraised

Files might come from a remote source and might have xattrs, including
security.ima. It should not be IMA task to decide whether security.ima
should be kept or not. This patch removes the removexattr() system
call in ima_inode_post_setattr().

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
---
 security/integrity/ima/ima_appraise.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 95c7a1fc0d01..2dbf0417f9e6 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -513,8 +513,6 @@ void ima_inode_post_setattr(struct dentry *dentry)
 		return;
 
 	action = ima_must_appraise(inode, MAY_ACCESS, POST_SETATTR);
-	if (!action)
-		__vfs_removexattr(dentry, XATTR_NAME_IMA);
 	iint = integrity_iint_find(inode);
 	if (iint) {
 		set_bit(IMA_CHANGE_ATTR, &iint->atomic_flags);
-- 
2.27.GIT