The patch titled
Subject: kasan: use unchecked __memset internally
has been added to the -mm mm-unstable branch. Its filename is
kasan-use-unchecked-__memset-internally.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-use-unchecked-__memset-internally.patch
This patch will later appear in the mm-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: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: use unchecked __memset internally
Date: Fri, 6 Oct 2023 17:18:44 +0200
KASAN code is supposed to use the unchecked __memset implementation when
accessing its metadata.
Change uses of memset to __memset in mm/kasan/.
Link: https://lkml.kernel.org/r/6f621966c6f52241b5aaa7220c348be90c075371.1696605143.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/report.c | 4 ++--
mm/kasan/shadow.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
--- a/mm/kasan/report.c~kasan-use-unchecked-__memset-internally
+++ a/mm/kasan/report.c
@@ -538,7 +538,7 @@ void kasan_report_invalid_free(void *ptr
start_report(&flags, true);
- memset(&info, 0, sizeof(info));
+ __memset(&info, 0, sizeof(info));
info.type = type;
info.access_addr = ptr;
info.access_size = 0;
@@ -576,7 +576,7 @@ bool kasan_report(const void *addr, size
start_report(&irq_flags, true);
- memset(&info, 0, sizeof(info));
+ __memset(&info, 0, sizeof(info));
info.type = KASAN_REPORT_ACCESS;
info.access_addr = addr;
info.access_size = size;
--- a/mm/kasan/shadow.c~kasan-use-unchecked-__memset-internally
+++ a/mm/kasan/shadow.c
@@ -324,7 +324,7 @@ static int kasan_populate_vmalloc_pte(pt
if (!page)
return -ENOMEM;
- memset((void *)page, KASAN_VMALLOC_INVALID, PAGE_SIZE);
+ __memset((void *)page, KASAN_VMALLOC_INVALID, PAGE_SIZE);
pte = pfn_pte(PFN_DOWN(__pa(page)), PAGE_KERNEL);
spin_lock(&init_mm.page_table_lock);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
arm64-kasan-update-comment-in-kasan_init.patch
kasan-unify-printk-prefixes.patch
kasan-use-unchecked-__memset-internally.patch
kasan-fix-and-update-kunit_expect_kasan_fail-comment.patch
documentation-san-drop-the-from-article-titles.patch
