From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Subject: mm: remove usercopy_warn()
Users of usercopy_warn() were removed by commit 53944f171a89 ("mm: remove
HARDENED_USERCOPY_FALLBACK")
Remove it.
Link: https://lkml.kernel.org/r/5f26643fc70b05f8455b60b99c30c17d635fa640.1644231910.git.christophe.leroy@xxxxxxxxxx
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Stephen Kitt <steve@xxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/uaccess.h | 2 --
mm/usercopy.c | 11 -----------
2 files changed, 13 deletions(-)
--- a/include/linux/uaccess.h~mm-remove-usercopy_warn
+++ a/include/linux/uaccess.h
@@ -401,8 +401,6 @@ static inline void user_access_restore(u
#endif
#ifdef CONFIG_HARDENED_USERCOPY
-void usercopy_warn(const char *name, const char *detail, bool to_user,
- unsigned long offset, unsigned long len);
void __noreturn usercopy_abort(const char *name, const char *detail,
bool to_user, unsigned long offset,
unsigned long len);
--- a/mm/usercopy.c~mm-remove-usercopy_warn
+++ a/mm/usercopy.c
@@ -70,17 +70,6 @@ static noinline int check_stack_object(c
* kmem_cache_create_usercopy() function to create the cache (and
* carefully audit the whitelist range).
*/
-void usercopy_warn(const char *name, const char *detail, bool to_user,
- unsigned long offset, unsigned long len)
-{
- WARN_ONCE(1, "Bad or missing usercopy whitelist? Kernel memory %s attempt detected %s %s%s%s%s (offset %lu, size %lu)!\n",
- to_user ? "exposure" : "overwrite",
- to_user ? "from" : "to",
- name ? : "unknown?!",
- detail ? " '" : "", detail ? : "", detail ? "'" : "",
- offset, len);
-}
-
void __noreturn usercopy_abort(const char *name, const char *detail,
bool to_user, unsigned long offset,
unsigned long len)
_
