jffs2: move jffs2_xattr_handlers to .rodata

This makes it harder for accidental or malicious changes to
jffs2_xattr_handlers at runtime.

Cc: David Woodhouse <dwmw2@infradead.org>
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/20230930050033.41174-16-wedsonaf@gmail.com
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index 3b6bdc9a49e1b0d25f87263c3a29705cd4b4258c..00224f3a8d6e71ff5e23d067c9fde9c7aee064cb 100644 (file)
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -920,7 +920,7 @@ struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
  * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags)
  *   is an implementation of setxattr handler on jffs2.
  * -------------------------------------------------- */
-const struct xattr_handler *jffs2_xattr_handlers[] = {
+const struct xattr_handler * const jffs2_xattr_handlers[] = {
        &jffs2_user_xattr_handler,
 #ifdef CONFIG_JFFS2_FS_SECURITY
        &jffs2_security_xattr_handler,

diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
index 1b5030a3349db969cc5c1247b9d5e8fede23dc66..7e7de093ec0a27d65f20adcf6952e5931dabb242 100644 (file)
--- a/fs/jffs2/xattr.h
+++ b/fs/jffs2/xattr.h
@@ -94,7 +94,7 @@ extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname
 extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
                             const char *buffer, size_t size, int flags);
 
-extern const struct xattr_handler *jffs2_xattr_handlers[];
+extern const struct xattr_handler * const jffs2_xattr_handlers[];
 extern const struct xattr_handler jffs2_user_xattr_handler;
 extern const struct xattr_handler jffs2_trusted_xattr_handler;