The quilt patch titled
Subject: mm, kasan: use KASAN_TAG_KERNEL instead of 0xff
has been removed from the -mm tree. Its filename was
mm-kasan-use-kasan_tag_kernel-instead-of-0xff.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: mm, kasan: use KASAN_TAG_KERNEL instead of 0xff
Date: Thu, 21 Dec 2023 21:04:44 +0100
Use the KASAN_TAG_KERNEL marco instead of open-coding 0xff in the mm code.
This macro is provided by include/linux/kasan-tags.h, which does not
include any other headers, so it's safe to include it into mm.h without
causing circular include dependencies.
Link: https://lkml.kernel.org/r/71db9087b0aebb6c4dccbc609cc0cd50621533c7.1703188911.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: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kasan.h | 1 +
include/linux/mm.h | 4 ++--
mm/page_alloc.c | 2 +-
3 files changed, 4 insertions(+), 3 deletions(-)
--- a/include/linux/kasan.h~mm-kasan-use-kasan_tag_kernel-instead-of-0xff
+++ a/include/linux/kasan.h
@@ -4,6 +4,7 @@
#include <linux/bug.h>
#include <linux/kasan-enabled.h>
+#include <linux/kasan-tags.h>
#include <linux/kernel.h>
#include <linux/static_key.h>
#include <linux/types.h>
--- a/include/linux/mm.h~mm-kasan-use-kasan_tag_kernel-instead-of-0xff
+++ a/include/linux/mm.h
@@ -1815,7 +1815,7 @@ static inline void vma_set_access_pid_bi
static inline u8 page_kasan_tag(const struct page *page)
{
- u8 tag = 0xff;
+ u8 tag = KASAN_TAG_KERNEL;
if (kasan_enabled()) {
tag = (page->flags >> KASAN_TAG_PGSHIFT) & KASAN_TAG_MASK;
@@ -1844,7 +1844,7 @@ static inline void page_kasan_tag_set(st
static inline void page_kasan_tag_reset(struct page *page)
{
if (kasan_enabled())
- page_kasan_tag_set(page, 0xff);
+ page_kasan_tag_set(page, KASAN_TAG_KERNEL);
}
#else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
--- a/mm/page_alloc.c~mm-kasan-use-kasan_tag_kernel-instead-of-0xff
+++ a/mm/page_alloc.c
@@ -1059,7 +1059,7 @@ static inline bool should_skip_kasan_poi
if (IS_ENABLED(CONFIG_KASAN_GENERIC))
return deferred_pages_enabled();
- return page_kasan_tag(page) == 0xff;
+ return page_kasan_tag(page) == KASAN_TAG_KERNEL;
}
static void kernel_init_pages(struct page *page, int numpages)
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-stop-leaking-stack-trace-handles.patch
