kernfs: move kernfs_xattr_handlers to .rodata

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

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20230930050033.41174-18-wedsonaf@gmail.com
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 922719a343a77a21afc60c92e42d8e689010acb6..f258ce9c0d1b578f22d79df9cfab784f01df7f4b 100644 (file)
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -445,7 +445,7 @@ static const struct xattr_handler kernfs_user_xattr_handler = {
        .set = kernfs_vfs_user_xattr_set,
 };
 
-const struct xattr_handler *kernfs_xattr_handlers[] = {
+const struct xattr_handler * const kernfs_xattr_handlers[] = {
        &kernfs_trusted_xattr_handler,
        &kernfs_security_xattr_handler,
        &kernfs_user_xattr_handler,

diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index a9b854cdfdb5f73e45f25fbea2cdce50c6b00931..237f2764b9412d65f2db6be01329d5565169a327 100644 (file)
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -127,7 +127,7 @@ extern struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
 /*
  * inode.c
  */
-extern const struct xattr_handler *kernfs_xattr_handlers[];
+extern const struct xattr_handler * const kernfs_xattr_handlers[];
 void kernfs_evict_inode(struct inode *inode);
 int kernfs_iop_permission(struct mnt_idmap *idmap,
                          struct inode *inode, int mask);