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Message-Id: <20221123095202.599252-2-roberto.sassu@huaweicloud.com>
Date: Wed, 23 Nov 2022 10:51:57 +0100
From: Roberto Sassu <roberto.sassu@...weicloud.com>
To: mark@...heh.com, jlbec@...lplan.org, joseph.qi@...ux.alibaba.com,
zohar@...ux.ibm.com, dmitry.kasatkin@...il.com,
paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com,
stephen.smalley.work@...il.com, eparis@...isplace.org,
casey@...aufler-ca.com
Cc: ocfs2-devel@....oracle.com, reiserfs-devel@...r.kernel.org,
linux-integrity@...r.kernel.org,
linux-security-module@...r.kernel.org, selinux@...r.kernel.org,
linux-kernel@...r.kernel.org, keescook@...omium.org,
nicolas.bouchinet@...p-os.org,
Roberto Sassu <roberto.sassu@...wei.com>
Subject: [PATCH v5 1/6] reiserfs: Switch to security_inode_init_security()
From: Roberto Sassu <roberto.sassu@...wei.com>
In preparation for removing security_old_inode_init_security(), switch to
security_inode_init_security().
Define the initxattrs callback reiserfs_initxattrs(), to populate the
name/value/len triple in the reiserfs_security_handle() with the first
xattr provided by LSMs. Multiple xattrs are currently not supported, as the
reiserfs_security_handle structure is exported to user space.
In reiserfs_initxattrs(), make a copy of the first xattr value, as
security_inode_init_security() frees it.
After the call to security_inode_init_security(), remove the check for
returning -EOPNOTSUPP, as security_inode_init_security() changes it to
zero.
Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
fs/reiserfs/xattr_security.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 857a65b05726..0ba96757681d 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -39,6 +39,22 @@ static bool security_list(struct dentry *dentry)
return !IS_PRIVATE(d_inode(dentry));
}
+static int
+reiserfs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
+ void *fs_info)
+{
+ struct reiserfs_security_handle *sec = fs_info;
+
+ sec->value = kmemdup(xattr_array->value, xattr_array->value_len,
+ GFP_KERNEL);
+ if (!sec->value)
+ return -ENOMEM;
+
+ sec->name = xattr_array->name;
+ sec->length = xattr_array->value_len;
+ return 0;
+}
+
/* Initializes the security context for a new inode and returns the number
* of blocks needed for the transaction. If successful, reiserfs_security
* must be released using reiserfs_security_free when the caller is done. */
@@ -56,12 +72,9 @@ int reiserfs_security_init(struct inode *dir, struct inode *inode,
if (IS_PRIVATE(dir))
return 0;
- error = security_old_inode_init_security(inode, dir, qstr, &sec->name,
- &sec->value, &sec->length);
+ error = security_inode_init_security(inode, dir, qstr,
+ &reiserfs_initxattrs, sec);
if (error) {
- if (error == -EOPNOTSUPP)
- error = 0;
-
sec->name = NULL;
sec->value = NULL;
sec->length = 0;
--
2.25.1
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