ubifs: move ubifs_xattr_handlers to .rodata

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

Cc: Richard Weinberger <richard@nod.at>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20230930050033.41174-26-wedsonaf@gmail.com
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: wedsonaf

fs/ubifs/ubifs.h

@@ -2043,7 +2043,7 @@ ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf,
 			size_t size);
 
 #ifdef CONFIG_UBIFS_FS_XATTR
-extern const struct xattr_handler *ubifs_xattr_handlers[];
+extern const struct xattr_handler * const ubifs_xattr_handlers[];
 ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 void ubifs_evict_xattr_inode(struct ubifs_info *c, ino_t xattr_inum);
 int ubifs_purge_xattrs(struct inode *host);

fs/ubifs/xattr.c

@@ -735,7 +735,7 @@ static const struct xattr_handler ubifs_security_xattr_handler = {
 };
 #endif
 
-const struct xattr_handler *ubifs_xattr_handlers[] = {
+const struct xattr_handler * const ubifs_xattr_handlers[] = {
 	&ubifs_user_xattr_handler,
 	&ubifs_trusted_xattr_handler,
 #ifdef CONFIG_UBIFS_FS_SECURITY