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erofs: move erofs_xattr_handlers and xattr_handler_map to .rodata

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

Cc: Gao Xiang <xiang@kernel.org>
Cc: Chao Yu <chao@kernel.org>
Cc: Yue Hu <huyue2@coolpad.com>
Cc: Jeffle Xu <jefflexu@linux.alibaba.com>
Cc: linux-erofs@lists.ozlabs.org
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20230930050033.41174-9-wedsonaf@gmail.com
Acked-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Wedson Almeida Filho 2023-09-30 02:00:12 -03:00 committed by Christian Brauner
parent f354ed9810
commit 3591f40e22
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
2 changed files with 3 additions and 3 deletions
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2
fs/erofs/xattr.c
View File

@ -168,7 +168,7 @@ const struct xattr_handler __maybe_unused erofs_xattr_security_handler = {
};
#endif
const struct xattr_handler *erofs_xattr_handlers[] = {
const struct xattr_handler * const erofs_xattr_handlers[] = {
&erofs_xattr_user_handler,
&erofs_xattr_trusted_handler,
#ifdef CONFIG_EROFS_FS_SECURITY

4
fs/erofs/xattr.h
View File

@ -23,7 +23,7 @@ static inline const char *erofs_xattr_prefix(unsigned int idx,
{
const struct xattr_handler *handler = NULL;
static const struct xattr_handler *xattr_handler_map[] = {
static const struct xattr_handler * const xattr_handler_map[] = {
[EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler,
#ifdef CONFIG_EROFS_FS_POSIX_ACL
[EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
@ -44,7 +44,7 @@ static inline const char *erofs_xattr_prefix(unsigned int idx,
return xattr_prefix(handler);
}
extern const struct xattr_handler *erofs_xattr_handlers[];
extern const struct xattr_handler * const erofs_xattr_handlers[];
int erofs_xattr_prefixes_init(struct super_block *sb);
void erofs_xattr_prefixes_cleanup(struct super_block *sb);