Re: [PATCH v6 16/18] khwasan, mm, arm64: tag non slab memory allocated via pagealloc
From: Andrey Ryabinin <hidden>
Date: 2018-09-07 16:06:39
Also in:
linux-arm-kernel, linux-kbuild, linux-mm, lkml
On 08/29/2018 02:35 PM, Andrey Konovalov wrote:
void kasan_poison_slab(struct page *page)
{
+ unsigned long i;
+
+ if (IS_ENABLED(CONFIG_SLAB))
+ page->s_mem = reset_tag(page->s_mem);Why reinitialize here, instead of single initialization in alloc_slabmgmt()?
+ for (i = 0; i < (1 << compound_order(page)); i++) + page_kasan_tag_reset(page + i); kasan_poison_shadow(page_address(page), PAGE_SIZE << compound_order(page), KASAN_KMALLOC_REDZONE);