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From:   Roberto Sassu <roberto.sassu@huawei.com>
To:     <zohar@linux.ibm.com>, <mjg59@google.com>
CC:     <linux-integrity@vger.kernel.org>,
        <linux-security-module@vger.kernel.org>,
        <linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <silviu.vlasceanu@huawei.com>,
        Roberto Sassu <roberto.sassu@huawei.com>
Subject: [PATCH v3 11/11] ima: Don't remove security.ima if file must not be appraised
Date:   Wed, 11 Nov 2020 10:23:02 +0100
Message-ID: <20201111092302.1589-12-roberto.sassu@huawei.com>
In-Reply-To: <20201111092302.1589-1-roberto.sassu@huawei.com>
References: <20201111092302.1589-1-roberto.sassu@huawei.com>
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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@huawei.com>
Reviewed-by: Mimi Zohar <zohar@linux.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 00b038941a10..f03cb4b7270d 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -529,8 +529,6 @@ 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