The patch titled
Subject: x86-uaccess-avoid-check_object_size-in-copy_from_user_nmi-fix
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
x86-uaccess-avoid-check_object_size-in-copy_from_user_nmi-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-uaccess-avoid-check_object_size-in-copy_from_user_nmi-fix.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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 via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: x86-uaccess-avoid-check_object_size-in-copy_from_user_nmi-fix
Date: Wed Sep 21 05:50:47 PM PDT 2022
no instrument_copy_from_user() in my tree...
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: Florian Lehner <dev@xxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Florian Lehner <dev@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/x86/lib/usercopy.c~x86-uaccess-avoid-check_object_size-in-copy_from_user_nmi-fix
+++ a/arch/x86/lib/usercopy.c
@@ -44,7 +44,6 @@ copy_from_user_nmi(void *to, const void
* called from other contexts.
*/
pagefault_disable();
- instrument_copy_from_user(to, from, n);
ret = raw_copy_from_user(to, from, n);
pagefault_enable();
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mmhwpoison-check-mm-when-killing-accessing-process-fix.patch
x86-uaccess-avoid-check_object_size-in-copy_from_user_nmi-fix.patch
mm-oom_kill-add-trace-logs-in-process_mrelease-system-call-fix.patch
mm-demotion-add-support-for-explicit-memory-tiers-fix.patch
mm-demotion-update-node_is_toptier-to-work-with-memory-tiers-fix-2.patch
mm-drop-oom-code-from-exit_mmap-fix-fix.patch
mm-delete-unused-mmf_oom_victim-flag-fix.patch
mm-add-merging-after-mremap-resize-checkpatch-fixes.patch
mm-reduce-noise-in-show_mem-for-lowmem-allocations-vs-mapletree.patch
mm-reduce-noise-in-show_mem-for-lowmem-allocations-vs-mapletree-fix.patch
mm-vmscan-fix-a-lot-of-comments-vs-mglru.patch
swap-add-swap_cache_get_folio-fix.patch
memcg-reduce-size-of-memcg-vmstats-structures-fix.patch
mm-damon-vaddr-add-a-comment-for-default-case-in-damon_va_apply_scheme-fix.patch
mm-page_allocc-rename-check_free_page-to-free_page_is_bad.patch
mm-page_allocc-rename-check_free_page-to-free_page_is_bad-fix.patch
mm-page_allocc-document-bulkfree_pcp_prepare-return-value.patch
fs-uninline-inode_maybe_inc_iversion.patch
ipc-msg-mitigate-the-lock-contention-with-percpu-counter-checkpatch-fixes.patch
ipc-msg-mitigate-the-lock-contention-with-percpu-counter-fix-fix.patch
