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| author |   Andrey Konovalov <andreyknvl@google.com> | 2018-12-28 00:30:01 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 12:11:43 -0800 |
| commit | 9577dd7486487722ed8f0773243223f108e8089f (patch) | |
| tree | f45461ff3b8ddc4f5a933007b341365609706c4d /arch/xtensa | |
| parent | kasan, arm64: adjust shadow size for tag-based mode (diff) | |
| download | linux-dev-9577dd7486487722ed8f0773243223f108e8089f.tar.xz linux-dev-9577dd7486487722ed8f0773243223f108e8089f.zip | |
kasan: rename kasan_zero_page to kasan_early_shadow_page
With tag based KASAN mode the early shadow value is 0xff and not 0x00, so
this patch renames kasan_zero_(page|pte|pmd|pud|p4d) to
kasan_early_shadow_(page|pte|pmd|pud|p4d) to avoid confusion.
Link: http://lkml.kernel.org/r/3fed313280ebf4f88645f5b89ccbc066d320e177.1544099024.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/mm/kasan_init.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c index 6b95ca43aec0..1734cda6bc4a 100644 --- a/arch/xtensa/mm/kasan_init.c +++ b/arch/xtensa/mm/kasan_init.c @@ -24,12 +24,13 @@ void __init kasan_early_init(void) int i; for (i = 0; i < PTRS_PER_PTE; ++i) - set_pte(kasan_zero_pte + i, - mk_pte(virt_to_page(kasan_zero_page), PAGE_KERNEL)); + set_pte(kasan_early_shadow_pte + i, + mk_pte(virt_to_page(kasan_early_shadow_page), + PAGE_KERNEL)); for (vaddr = 0; vaddr < KASAN_SHADOW_SIZE; vaddr += PMD_SIZE, ++pmd) { BUG_ON(!pmd_none(*pmd)); - set_pmd(pmd, __pmd((unsigned long)kasan_zero_pte)); + set_pmd(pmd, __pmd((unsigned long)kasan_early_shadow_pte)); } early_trap_init(); } @@ -80,13 +81,16 @@ void __init kasan_init(void) populate(kasan_mem_to_shadow((void *)VMALLOC_START), kasan_mem_to_shadow((void *)XCHAL_KSEG_BYPASS_VADDR)); - /* Write protect kasan_zero_page and zero-initialize it again. */ + /* + * Write protect kasan_early_shadow_page and zero-initialize it again. + */ for (i = 0; i < PTRS_PER_PTE; ++i) - set_pte(kasan_zero_pte + i, - mk_pte(virt_to_page(kasan_zero_page), PAGE_KERNEL_RO)); + set_pte(kasan_early_shadow_pte + i, + mk_pte(virt_to_page(kasan_early_shadow_page), + PAGE_KERNEL_RO)); local_flush_tlb_all(); - memset(kasan_zero_page, 0, PAGE_SIZE); + memset(kasan_early_shadow_page, 0, PAGE_SIZE); /* At this point kasan is fully initialized. Enable error messages. */ current->kasan_depth = 0; |