btrfs: move btrfs_xattr_handlers to .rodata

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

Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: David Sterba <dsterba@suse.com>
Cc: linux-btrfs@vger.kernel.org
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20230930050033.41174-6-wedsonaf@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 96828a13dd43d9ae0beb1562072c93657763c6d4..a9f8b173a99f0014ab5944fa45e1800fadc69a89 100644 (file)
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -442,7 +442,7 @@ static const struct xattr_handler btrfs_btrfs_xattr_handler = {
        .set = btrfs_xattr_handler_set_prop,
 };
 
-const struct xattr_handler *btrfs_xattr_handlers[] = {
+const struct xattr_handler * const btrfs_xattr_handlers[] = {
        &btrfs_security_xattr_handler,
        &btrfs_trusted_xattr_handler,
        &btrfs_user_xattr_handler,

diff --git a/fs/btrfs/xattr.h b/fs/btrfs/xattr.h
index 1cd3fc0a8f178fa28c947c19cf3085e2ff87fe4d..118118ca3e1de7a04bb33a581f9b397755fb7932 100644 (file)
--- a/fs/btrfs/xattr.h
+++ b/fs/btrfs/xattr.h
@@ -8,7 +8,7 @@
 
 #include <linux/xattr.h>
 
-extern const struct xattr_handler *btrfs_xattr_handlers[];
+extern const struct xattr_handler * const btrfs_xattr_handlers[];
 
 int btrfs_getxattr(struct inode *inode, const char *name,
                void *buffer, size_t size);