The patch titled
Subject: mm-support-only-one-page_type-per-page-fix
has been added to the -mm mm-nonmm-unstable branch. Its filename is
mm-support-only-one-page_type-per-page-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-support-only-one-page_type-per-page-fix.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm-support-only-one-page_type-per-page-fix
Date: Wed, 28 Aug 2024 11:35:28 +0800
fix ubsan warnings
UBSAN: shift-out-of-bounds in ../include/linux/page-flags.h:998:1
left shift of 240 by 24 places cannot be represented in type 'int'
...
Changing significant bit to unsigned to fix it.
Link: https://lkml.kernel.org/r/2d19c48a-c550-4345-bf36-d05cd303c5de@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/linux/page-flags.h~mm-support-only-one-page_type-per-page-fix
+++ a/include/linux/page-flags.h
@@ -966,7 +966,7 @@ static __always_inline void __folio_set_
{ \
VM_BUG_ON_FOLIO(data_race(folio->page.page_type) != UINT_MAX, \
folio); \
- folio->page.page_type = PGTY_##lname << 24; \
+ folio->page.page_type = (unsigned int)PGTY_##lname << 24; \
} \
static __always_inline void __folio_clear_##fname(struct folio *folio) \
{ \
@@ -983,7 +983,7 @@ static __always_inline int Page##uname(c
static __always_inline void __SetPage##uname(struct page *page) \
{ \
VM_BUG_ON_PAGE(data_race(page->page_type) != UINT_MAX, page); \
- page->page_type = PGTY_##lname << 24; \
+ page->page_type = (unsigned int)PGTY_##lname << 24; \
} \
static __always_inline void __ClearPage##uname(struct page *page) \
{ \
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
mm-hugetlb-remove-left-over-comment-about-follow_huge_foo.patch
mm-remove-migration-for-hugepage-in-isolate_single_pageblock.patch
mm-memory_hotplug-remove-head-variable-in-do_migrate_range.patch
mm-memory-failure-add-unmap_poisoned_folio.patch
mm-memory_hotplug-check-hwpoisoned-page-firstly-in-do_migrate_range.patch
mm-migrate-add-isolate_folio_to_list.patch
mm-memory_hotplug-unify-huge-lru-non-lru-movable-folio-isolation.patch
mm-migrate_device-convert-to-migrate_device_coherent_folio.patch
mm-migrate_device-use-a-folio-in-migrate_device_range.patch
mm-migrate_device-use-more-folio-in-migrate_device_unmap.patch
mm-migrate_device-use-more-folio-in-migrate_device_finalize.patch
mm-remove-isolate_lru_page.patch
mm-remove-isolate_lru_page-fix.patch
mm-remove-putback_lru_page.patch
mm-migrate-add-folio_isolate_movable.patch
mm-compaction-convert-to-folio_isolate_movable.patch
mm-migrate-convert-to-folio_isolate_movable.patch
mm-migrate-remove-isolate_movable_page.patch
mm-support-only-one-page_type-per-page-fix.patch
