The patch titled
Subject: mm: remove usercopy_warn()
has been added to the -mm tree. Its filename is
mm-remove-usercopy_warn.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-remove-usercopy_warn.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-remove-usercopy_warn.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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>
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)
_
Patches currently in -mm which might be from christophe.leroy@xxxxxxxxxx are
mm-remove-usercopy_warn.patch
mm-outline-copy_overflow.patch
ilog2-force-inlining-of-__ilog2_u32-and-__ilog2_u64.patch
