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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-10-04 16:46:46 +0300 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2022-01-06 14:26:14 +0300 |
| commit | 6e48a966dfd18987fec9385566a67d36e2b5fc11 (patch) | |
| tree | 86563a5541c93ba5be6ba7963d2e58ada19ebd82 /mm/kasan/report_tags.c | |
| parent | 50757018b4c9b02dbf7fcc0514e0fc45b8689c62 (diff) | |
| download | linux-6e48a966dfd18987fec9385566a67d36e2b5fc11.tar.xz | |
mm/kasan: Convert to struct folio and struct slab
KASAN accesses some slab related struct page fields so we need to
convert it to struct slab. Some places are a bit simplified thanks to
kasan_addr_to_slab() encapsulating the PageSlab flag check through
virt_to_slab(). When resolving object address to either a real slab or
a large kmalloc, use struct folio as the intermediate type for testing
the slab flag to avoid unnecessary implicit compound_head().
[ vbabka@suse.cz: use struct folio, adjust to differences in previous
patches ]
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Tested-by: Hyeongogn Yoo <42.hyeyoo@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <kasan-dev@googlegroups.com>
Diffstat (limited to 'mm/kasan/report_tags.c')
| -rw-r--r-- | mm/kasan/report_tags.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/kasan/report_tags.c b/mm/kasan/report_tags.c index 06c21dd77493..1b41de88c53e 100644 --- a/mm/kasan/report_tags.c +++ b/mm/kasan/report_tags.c @@ -12,7 +12,7 @@ const char *kasan_get_bug_type(struct kasan_access_info *info) #ifdef CONFIG_KASAN_TAGS_IDENTIFY struct kasan_alloc_meta *alloc_meta; struct kmem_cache *cache; - struct page *page; + struct slab *slab; const void *addr; void *object; u8 tag; @@ -20,10 +20,10 @@ const char *kasan_get_bug_type(struct kasan_access_info *info) tag = get_tag(info->access_addr); addr = kasan_reset_tag(info->access_addr); - page = kasan_addr_to_page(addr); - if (page && PageSlab(page)) { - cache = page->slab_cache; - object = nearest_obj(cache, page_slab(page), (void *)addr); + slab = kasan_addr_to_slab(addr); + if (slab) { + cache = slab->slab_cache; + object = nearest_obj(cache, slab, (void *)addr); alloc_meta = kasan_get_alloc_meta(cache, object); if (alloc_meta) { |