The patch titled
Subject: kasan: use kasan_addr_to_slab in print_address_description
has been added to the -mm mm-unstable branch. Its filename is
kasan-use-kasan_addr_to_slab-in-print_address_description.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-use-kasan_addr_to_slab-in-print_address_description.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: use kasan_addr_to_slab in print_address_description
Date: Mon, 5 Sep 2022 23:05:38 +0200
Use the kasan_addr_to_slab() helper in print_address_description() instead
of separately invoking PageSlab() and page_slab().
Link: https://lkml.kernel.org/r/8b744fbf8c3c7fc5d34329ec70b60ee5c8dba66c.1662411799.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Peter Collingbourne <pcc@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/common.c | 7 +++++++
mm/kasan/report.c | 11 ++---------
2 files changed, 9 insertions(+), 9 deletions(-)
--- a/mm/kasan/common.c~kasan-use-kasan_addr_to_slab-in-print_address_description
+++ a/mm/kasan/common.c
@@ -30,6 +30,13 @@
#include "kasan.h"
#include "../slab.h"
+struct slab *kasan_addr_to_slab(const void *addr)
+{
+ if (virt_addr_valid(addr))
+ return virt_to_slab(addr);
+ return NULL;
+}
+
depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc)
{
unsigned long entries[KASAN_STACK_DEPTH];
--- a/mm/kasan/report.c~kasan-use-kasan_addr_to_slab-in-print_address_description
+++ a/mm/kasan/report.c
@@ -213,13 +213,6 @@ struct page *kasan_addr_to_page(const vo
return NULL;
}
-struct slab *kasan_addr_to_slab(const void *addr)
-{
- if (virt_addr_valid(addr))
- return virt_to_slab(addr);
- return NULL;
-}
-
static void describe_object_addr(struct kmem_cache *cache, void *object,
const void *addr)
{
@@ -297,12 +290,12 @@ static inline bool init_task_stack_addr(
static void print_address_description(void *addr, u8 tag)
{
struct page *page = kasan_addr_to_page(addr);
+ struct slab *slab = kasan_addr_to_slab(addr);
dump_stack_lvl(KERN_ERR);
pr_err("\n");
- if (page && PageSlab(page)) {
- struct slab *slab = page_slab(page);
+ if (slab) {
struct kmem_cache *cache = slab->slab_cache;
void *object = nearest_obj(cache, slab, addr);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-check-kasan_no_free_meta-in-__kasan_metadata_size.patch
kasan-rename-kasan_set__info-to-kasan_save__info.patch
kasan-move-is_kmalloc-check-out-of-save_alloc_info.patch
kasan-split-save_alloc_info-implementations.patch
kasan-drop-config_kasan_tags_identify.patch
kasan-introduce-kasan_print_aux_stacks.patch
kasan-introduce-kasan_get_alloc_track.patch
kasan-introduce-kasan_init_object_meta.patch
kasan-clear-metadata-functions-for-tag-based-modes.patch
kasan-move-kasan_get__meta-to-genericc.patch
kasan-introduce-kasan_requires_meta.patch
kasan-introduce-kasan_init_cache_meta.patch
kasan-drop-config_kasan_generic-check-from-kasan_init_cache_meta.patch
kasan-only-define-kasan_metadata_size-for-generic-mode.patch
kasan-only-define-kasan_never_merge-for-generic-mode.patch
kasan-only-define-metadata-offsets-for-generic-mode.patch
kasan-only-define-metadata-structs-for-generic-mode.patch
kasan-only-define-kasan_cache_create-for-generic-mode.patch
kasan-pass-tagged-pointers-to-kasan_save_alloc-free_info.patch
kasan-move-kasan_get_alloc-free_track-definitions.patch
kasan-cosmetic-changes-in-reportc.patch
kasan-use-virt_addr_valid-in-kasan_addr_to_page-slab.patch
kasan-use-kasan_addr_to_slab-in-print_address_description.patch
kasan-make-kasan_addr_to_page-static.patch
kasan-simplify-print_report.patch
kasan-introduce-complete_report_info.patch
kasan-fill-in-cache-and-object-in-complete_report_info.patch
kasan-rework-function-arguments-in-reportc.patch
kasan-introduce-kasan_complete_mode_report_info.patch
kasan-implement-stack-ring-for-tag-based-modes.patch
kasan-support-kasanstacktrace-for-sw_tags.patch
kasan-dynamically-allocate-stack-ring-entries.patch
kasan-better-identify-bug-types-for-tag-based-modes.patch
kasan-add-another-use-after-free-test.patch
kasan-move-tests-to-mm-kasan.patch
