linux-kernel - [PATCH 09/11] ima: Don't remove security.ima if file must not be appraised

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Message-ID: <20200618160458.1579-9-roberto.sassu@huawei.com>
Date:   Thu, 18 Jun 2020 18:04:56 +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 09/11] 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>
---
 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 9505bb390d90..83c62eaf342d 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -504,8 +504,6 @@ 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);
-- 
2.17.1