linux-kernel - [PATCH 06/29] ceph: move ceph_xattr

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Date:   Sat, 30 Sep 2023 02:00:10 -0300
From:   Wedson Almeida Filho <wedsonaf@...il.com>
To:     Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>,
        linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Wedson Almeida Filho <walmeida@...rosoft.com>,
        Xiubo Li <xiubli@...hat.com>,
        Ilya Dryomov <idryomov@...il.com>,
        Jeff Layton <jlayton@...nel.org>, ceph-devel@...r.kernel.org
Subject: [PATCH 06/29] ceph: move ceph_xattr_handlers to .rodata

From: Wedson Almeida Filho <walmeida@...rosoft.com>

This makes it harder for accidental or malicious changes to
ceph_xattr_handlers at runtime.

Cc: Xiubo Li <xiubli@...hat.com>
Cc: Ilya Dryomov <idryomov@...il.com>
Cc: Jeff Layton <jlayton@...nel.org>
Cc: ceph-devel@...r.kernel.org
Signed-off-by: Wedson Almeida Filho <walmeida@...rosoft.com>
---
 fs/ceph/super.h | 2 +-
 fs/ceph/xattr.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 3bfddf34d488..b40be1a0f778 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -1089,7 +1089,7 @@ ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
-extern const struct xattr_handler *ceph_xattr_handlers[];
+extern const struct xattr_handler * const ceph_xattr_handlers[];
 
 struct ceph_acl_sec_ctx {
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 806183959c47..0350d7465bbb 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -1416,7 +1416,7 @@ void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx)
  * List of handlers for synthetic system.* attributes. Other
  * attributes are handled directly.
  */
-const struct xattr_handler *ceph_xattr_handlers[] = {
+const struct xattr_handler * const ceph_xattr_handlers[] = {
 	&ceph_other_xattr_handler,
 	NULL,
 };
-- 
2.34.1