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authorAndrey Konovalov <andreyknvl@google.com>2018-12-28 00:30:01 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-28 12:11:43 -0800
commit9577dd7486487722ed8f0773243223f108e8089f (patch)
treef45461ff3b8ddc4f5a933007b341365609706c4d /arch
parentb2f557eae9ed0ab2b612ce9ce7e3f06174a83e76 (diff)
downloadlinux-9577dd7486487722ed8f0773243223f108e8089f.tar.gz
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')
-rw-r--r--arch/arm64/mm/kasan_init.c43
-rw-r--r--arch/s390/mm/dump_pagetables.c17
-rw-r--r--arch/s390/mm/kasan_init.c33
-rw-r--r--arch/x86/mm/dump_pagetables.c11
-rw-r--r--arch/x86/mm/kasan_init_64.c55
-rw-r--r--arch/xtensa/mm/kasan_init.c18
6 files changed, 99 insertions, 78 deletions
diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c
index 63527e585aac..4ebc19422931 100644
--- a/arch/arm64/mm/kasan_init.c
+++ b/arch/arm64/mm/kasan_init.c
@@ -47,8 +47,9 @@ static pte_t *__init kasan_pte_offset(pmd_t *pmdp, unsigned long addr, int node,
bool early)
{
if (pmd_none(READ_ONCE(*pmdp))) {
- phys_addr_t pte_phys = early ? __pa_symbol(kasan_zero_pte)
- : kasan_alloc_zeroed_page(node);
+ phys_addr_t pte_phys = early ?
+ __pa_symbol(kasan_early_shadow_pte)
+ : kasan_alloc_zeroed_page(node);
__pmd_populate(pmdp, pte_phys, PMD_TYPE_TABLE);
}
@@ -60,8 +61,9 @@ static pmd_t *__init kasan_pmd_offset(pud_t *pudp, unsigned long addr, int node,
bool early)
{
if (pud_none(READ_ONCE(*pudp))) {
- phys_addr_t pmd_phys = early ? __pa_symbol(kasan_zero_pmd)
- : kasan_alloc_zeroed_page(node);
+ phys_addr_t pmd_phys = early ?
+ __pa_symbol(kasan_early_shadow_pmd)
+ : kasan_alloc_zeroed_page(node);
__pud_populate(pudp, pmd_phys, PMD_TYPE_TABLE);
}
@@ -72,8 +74,9 @@ static pud_t *__init kasan_pud_offset(pgd_t *pgdp, unsigned long addr, int node,
bool early)
{
if (pgd_none(READ_ONCE(*pgdp))) {
- phys_addr_t pud_phys = early ? __pa_symbol(kasan_zero_pud)
- : kasan_alloc_zeroed_page(node);
+ phys_addr_t pud_phys = early ?
+ __pa_symbol(kasan_early_shadow_pud)
+ : kasan_alloc_zeroed_page(node);
__pgd_populate(pgdp, pud_phys, PMD_TYPE_TABLE);
}
@@ -87,8 +90,9 @@ static void __init kasan_pte_populate(pmd_t *pmdp, unsigned long addr,
pte_t *ptep = kasan_pte_offset(pmdp, addr, node, early);
do {
- phys_addr_t page_phys = early ? __pa_symbol(kasan_zero_page)
- : kasan_alloc_zeroed_page(node);
+ phys_addr_t page_phys = early ?
+ __pa_symbol(kasan_early_shadow_page)
+ : kasan_alloc_zeroed_page(node);
next = addr + PAGE_SIZE;
set_pte(ptep, pfn_pte(__phys_to_pfn(page_phys), PAGE_KERNEL));
} while (ptep++, addr = next, addr != end && pte_none(READ_ONCE(*ptep)));
@@ -205,14 +209,14 @@ void __init kasan_init(void)
kasan_map_populate(kimg_shadow_start, kimg_shadow_end,
early_pfn_to_nid(virt_to_pfn(lm_alias(_text))));
- kasan_populate_zero_shadow((void *)KASAN_SHADOW_START,
- (void *)mod_shadow_start);
- kasan_populate_zero_shadow((void *)kimg_shadow_end,
- kasan_mem_to_shadow((void *)PAGE_OFFSET));
+ kasan_populate_early_shadow((void *)KASAN_SHADOW_START,
+ (void *)mod_shadow_start);
+ kasan_populate_early_shadow((void *)kimg_shadow_end,
+ kasan_mem_to_shadow((void *)PAGE_OFFSET));
if (kimg_shadow_start > mod_shadow_end)
- kasan_populate_zero_shadow((void *)mod_shadow_end,
- (void *)kimg_shadow_start);
+ kasan_populate_early_shadow((void *)mod_shadow_end,
+ (void *)kimg_shadow_start);
for_each_memblock(memory, reg) {
void *start = (void *)__phys_to_virt(reg->base);
@@ -227,14 +231,15 @@ void __init kasan_init(void)
}
/*
- * KAsan may reuse the contents of kasan_zero_pte directly, so we
- * should make sure that it maps the zero page read-only.
+ * KAsan may reuse the contents of kasan_early_shadow_pte directly,
+ * so we should make sure that it maps the zero page read-only.
*/
for (i = 0; i < PTRS_PER_PTE; i++)
- set_pte(&kasan_zero_pte[i],
- pfn_pte(sym_to_pfn(kasan_zero_page), PAGE_KERNEL_RO));
+ set_pte(&kasan_early_shadow_pte[i],
+ pfn_pte(sym_to_pfn(kasan_early_shadow_page),
+ PAGE_KERNEL_RO));
- memset(kasan_zero_page, 0, PAGE_SIZE);
+ memset(kasan_early_shadow_page, 0, PAGE_SIZE);
cpu_replace_ttbr1(lm_alias(swapper_pg_dir));
/* At this point kasan is fully initialized. Enable error messages */
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index 363f6470d742..3b93ba0b5d8d 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -111,11 +111,12 @@ static void note_page(struct seq_file *m, struct pg_state *st,
}
#ifdef CONFIG_KASAN
-static void note_kasan_zero_page(struct seq_file *m, struct pg_state *st)
+static void note_kasan_early_shadow_page(struct seq_file *m,
+ struct pg_state *st)
{
unsigned int prot;
- prot = pte_val(*kasan_zero_pte) &
+ prot = pte_val(*kasan_early_shadow_pte) &
(_PAGE_PROTECT | _PAGE_INVALID | _PAGE_NOEXEC);
note_page(m, st, prot, 4);
}
@@ -154,8 +155,8 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
int i;
#ifdef CONFIG_KASAN
- if ((pud_val(*pud) & PAGE_MASK) == __pa(kasan_zero_pmd)) {
- note_kasan_zero_page(m, st);
+ if ((pud_val(*pud) & PAGE_MASK) == __pa(kasan_early_shadow_pmd)) {
+ note_kasan_early_shadow_page(m, st);
return;
}
#endif
@@ -185,8 +186,8 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st,
int i;
#ifdef CONFIG_KASAN
- if ((p4d_val(*p4d) & PAGE_MASK) == __pa(kasan_zero_pud)) {
- note_kasan_zero_page(m, st);
+ if ((p4d_val(*p4d) & PAGE_MASK) == __pa(kasan_early_shadow_pud)) {
+ note_kasan_early_shadow_page(m, st);
return;
}
#endif
@@ -215,8 +216,8 @@ static void walk_p4d_level(struct seq_file *m, struct pg_state *st,
int i;
#ifdef CONFIG_KASAN
- if ((pgd_val(*pgd) & PAGE_MASK) == __pa(kasan_zero_p4d)) {
- note_kasan_zero_page(m, st);
+ if ((pgd_val(*pgd) & PAGE_MASK) == __pa(kasan_early_shadow_p4d)) {
+ note_kasan_early_shadow_page(m, st);
return;
}
#endif
diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c
index acb9645b762b..bac5c27d11fc 100644
--- a/arch/s390/mm/kasan_init.c
+++ b/arch/s390/mm/kasan_init.c
@@ -107,7 +107,8 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
if (mode == POPULATE_ZERO_SHADOW &&
IS_ALIGNED(address, PGDIR_SIZE) &&
end - address >= PGDIR_SIZE) {
- pgd_populate(&init_mm, pg_dir, kasan_zero_p4d);
+ pgd_populate(&init_mm, pg_dir,
+ kasan_early_shadow_p4d);
address = (address + PGDIR_SIZE) & PGDIR_MASK;
continue;
}
@@ -120,7 +121,8 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
if (mode == POPULATE_ZERO_SHADOW &&
IS_ALIGNED(address, P4D_SIZE) &&
end - address >= P4D_SIZE) {
- p4d_populate(&init_mm, p4_dir, kasan_zero_pud);
+ p4d_populate(&init_mm, p4_dir,
+ kasan_early_shadow_pud);
address = (address + P4D_SIZE) & P4D_MASK;
continue;
}
@@ -133,7 +135,8 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
if (mode == POPULATE_ZERO_SHADOW &&
IS_ALIGNED(address, PUD_SIZE) &&
end - address >= PUD_SIZE) {
- pud_populate(&init_mm, pu_dir, kasan_zero_pmd);
+ pud_populate(&init_mm, pu_dir,
+ kasan_early_shadow_pmd);
address = (address + PUD_SIZE) & PUD_MASK;
continue;
}
@@ -146,7 +149,8 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
if (mode == POPULATE_ZERO_SHADOW &&
IS_ALIGNED(address, PMD_SIZE) &&
end - address >= PMD_SIZE) {
- pmd_populate(&init_mm, pm_dir, kasan_zero_pte);
+ pmd_populate(&init_mm, pm_dir,
+ kasan_early_shadow_pte);
address = (address + PMD_SIZE) & PMD_MASK;
continue;
}
@@ -188,7 +192,7 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
pte_val(*pt_dir) = __pa(page) | pgt_prot;
break;
case POPULATE_ZERO_SHADOW:
- page = kasan_zero_page;
+ page = kasan_early_shadow_page;
pte_val(*pt_dir) = __pa(page) | pgt_prot_zero;
break;
}
@@ -256,14 +260,14 @@ void __init kasan_early_init(void)
unsigned long vmax;
unsigned long pgt_prot = pgprot_val(PAGE_KERNEL_RO);
pte_t pte_z;
- pmd_t pmd_z = __pmd(__pa(kasan_zero_pte) | _SEGMENT_ENTRY);
- pud_t pud_z = __pud(__pa(kasan_zero_pmd) | _REGION3_ENTRY);
- p4d_t p4d_z = __p4d(__pa(kasan_zero_pud) | _REGION2_ENTRY);
+ pmd_t pmd_z = __pmd(__pa(kasan_early_shadow_pte) | _SEGMENT_ENTRY);
+ pud_t pud_z = __pud(__pa(kasan_early_shadow_pmd) | _REGION3_ENTRY);
+ p4d_t p4d_z = __p4d(__pa(kasan_early_shadow_pud) | _REGION2_ENTRY);
kasan_early_detect_facilities();
if (!has_nx)
pgt_prot &= ~_PAGE_NOEXEC;
- pte_z = __pte(__pa(kasan_zero_page) | pgt_prot);
+ pte_z = __pte(__pa(kasan_early_shadow_page) | pgt_prot);
memsize = get_mem_detect_end();
if (!memsize)
@@ -292,10 +296,13 @@ void __init kasan_early_init(void)
}
/* init kasan zero shadow */
- crst_table_init((unsigned long *)kasan_zero_p4d, p4d_val(p4d_z));
- crst_table_init((unsigned long *)kasan_zero_pud, pud_val(pud_z));
- crst_table_init((unsigned long *)kasan_zero_pmd, pmd_val(pmd_z));
- memset64((u64 *)kasan_zero_pte, pte_val(pte_z), PTRS_PER_PTE);
+ crst_table_init((unsigned long *)kasan_early_shadow_p4d,
+ p4d_val(p4d_z));
+ crst_table_init((unsigned long *)kasan_early_shadow_pud,
+ pud_val(pud_z));
+ crst_table_init((unsigned long *)kasan_early_shadow_pmd,
+ pmd_val(pmd_z));
+ memset64((u64 *)kasan_early_shadow_pte, pte_val(pte_z), PTRS_PER_PTE);
shadow_alloc_size = memsize >> KASAN_SHADOW_SCALE_SHIFT;
pgalloc_low = round_up((unsigned long)_end, _SEGMENT_SIZE);
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index abcb8d00b014..e3cdc85ce5b6 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -377,7 +377,7 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st, pmd_t addr,
/*
* This is an optimization for KASAN=y case. Since all kasan page tables
- * eventually point to the kasan_zero_page we could call note_page()
+ * eventually point to the kasan_early_shadow_page we could call note_page()
* right away without walking through lower level page tables. This saves
* us dozens of seconds (minutes for 5-level config) while checking for
* W+X mapping or reading kernel_page_tables debugfs file.
@@ -385,10 +385,11 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st, pmd_t addr,
static inline bool kasan_page_table(struct seq_file *m, struct pg_state *st,
void *pt)
{
- if (__pa(pt) == __pa(kasan_zero_pmd) ||
- (pgtable_l5_enabled() && __pa(pt) == __pa(kasan_zero_p4d)) ||
- __pa(pt) == __pa(kasan_zero_pud)) {
- pgprotval_t prot = pte_flags(kasan_zero_pte[0]);
+ if (__pa(pt) == __pa(kasan_early_shadow_pmd) ||
+ (pgtable_l5_enabled() &&
+ __pa(pt) == __pa(kasan_early_shadow_p4d)) ||
+ __pa(pt) == __pa(kasan_early_shadow_pud)) {
+ pgprotval_t prot = pte_flags(kasan_early_shadow_pte[0]);
note_page(m, st, __pgprot(prot), 0, 5);
return true;
}
diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index 04a9cf6b034f..462fde83b515 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -211,7 +211,8 @@ static void __init kasan_early_p4d_populate(pgd_t *pgd,
unsigned long next;
if (pgd_none(*pgd)) {
- pgd_entry = __pgd(_KERNPG_TABLE | __pa_nodebug(kasan_zero_p4d));
+ pgd_entry = __pgd(_KERNPG_TABLE |
+ __pa_nodebug(kasan_early_shadow_p4d));
set_pgd(pgd, pgd_entry);
}
@@ -222,7 +223,8 @@ static void __init kasan_early_p4d_populate(pgd_t *pgd,
if (!p4d_none(*p4d))
continue;
- p4d_entry = __p4d(_KERNPG_TABLE | __pa_nodebug(kasan_zero_pud));
+ p4d_entry = __p4d(_KERNPG_TABLE |
+ __pa_nodebug(kasan_early_shadow_pud));
set_p4d(p4d, p4d_entry);
} while (p4d++, addr = next, addr != end && p4d_none(*p4d));
}
@@ -261,10 +263,11 @@ static struct notifier_block kasan_die_notifier = {
void __init kasan_early_init(void)
{
int i;
- pteval_t pte_val = __pa_nodebug(kasan_zero_page) | __PAGE_KERNEL | _PAGE_ENC;
- pmdval_t pmd_val = __pa_nodebug(kasan_zero_pte) | _KERNPG_TABLE;
- pudval_t pud_val = __pa_nodebug(kasan_zero_pmd) | _KERNPG_TABLE;
- p4dval_t p4d_val = __pa_nodebug(kasan_zero_pud) | _KERNPG_TABLE;
+ pteval_t pte_val = __pa_nodebug(kasan_early_shadow_page) |
+ __PAGE_KERNEL | _PAGE_ENC;
+ pmdval_t pmd_val = __pa_nodebug(kasan_early_shadow_pte) | _KERNPG_TABLE;
+ pudval_t pud_val = __pa_nodebug(kasan_early_shadow_pmd) | _KERNPG_TABLE;
+ p4dval_t p4d_val = __pa_nodebug(kasan_early_shadow_pud) | _KERNPG_TABLE;
/* Mask out unsupported __PAGE_KERNEL bits: */
pte_val &= __default_kernel_pte_mask;
@@ -273,16 +276,16 @@ void __init kasan_early_init(void)
p4d_val &= __default_kernel_pte_mask;
for (i = 0; i < PTRS_PER_PTE; i++)
- kasan_zero_pte[i] = __pte(pte_val);
+ kasan_early_shadow_pte[i] = __pte(pte_val);
for (i = 0; i < PTRS_PER_PMD; i++)
- kasan_zero_pmd[i] = __pmd(pmd_val);
+ kasan_early_shadow_pmd[i] = __pmd(pmd_val);
for (i = 0; i < PTRS_PER_PUD; i++)
- kasan_zero_pud[i] = __pud(pud_val);
+ kasan_early_shadow_pud[i] = __pud(pud_val);
for (i = 0; pgtable_l5_enabled() && i < PTRS_PER_P4D; i++)
- kasan_zero_p4d[i] = __p4d(p4d_val);
+ kasan_early_shadow_p4d[i] = __p4d(p4d_val);
kasan_map_early_shadow(early_top_pgt);
kasan_map_early_shadow(init_top_pgt);
@@ -326,7 +329,7 @@ void __init kasan_init(void)
clear_pgds(KASAN_SHADOW_START & PGDIR_MASK, KASAN_SHADOW_END);
- kasan_populate_zero_shadow((void *)(KASAN_SHADOW_START & PGDIR_MASK),
+ kasan_populate_early_shadow((void *)(KASAN_SHADOW_START & PGDIR_MASK),
kasan_mem_to_shadow((void *)PAGE_OFFSET));
for (i = 0; i < E820_MAX_ENTRIES; i++) {
@@ -338,41 +341,41 @@ void __init kasan_init(void)
shadow_cpu_entry_begin = (void *)CPU_ENTRY_AREA_BASE;
shadow_cpu_entry_begin = kasan_mem_to_shadow(shadow_cpu_entry_begin);
- shadow_cpu_entry_begin = (void *)round_down((unsigned long)shadow_cpu_entry_begin,
- PAGE_SIZE);
+ shadow_cpu_entry_begin = (void *)round_down(
+ (unsigned long)shadow_cpu_entry_begin, PAGE_SIZE);
shadow_cpu_entry_end = (void *)(CPU_ENTRY_AREA_BASE +
CPU_ENTRY_AREA_MAP_SIZE);
shadow_cpu_entry_end = kasan_mem_to_shadow(shadow_cpu_entry_end);
- shadow_cpu_entry_end = (void *)round_up((unsigned long)shadow_cpu_entry_end,
- PAGE_SIZE);
+ shadow_cpu_entry_end = (void *)round_up(
+ (unsigned long)shadow_cpu_entry_end, PAGE_SIZE);
- kasan_populate_zero_shadow(
+ kasan_populate_early_shadow(
kasan_mem_to_shadow((void *)PAGE_OFFSET + MAXMEM),
shadow_cpu_entry_begin);
kasan_populate_shadow((unsigned long)shadow_cpu_entry_begin,
(unsigned long)shadow_cpu_entry_end, 0);
- kasan_populate_zero_shadow(shadow_cpu_entry_end,
- kasan_mem_to_shadow((void *)__START_KERNEL_map));
+ kasan_populate_early_shadow(shadow_cpu_entry_end,
+ kasan_mem_to_shadow((void *)__START_KERNEL_map));
kasan_populate_shadow((unsigned long)kasan_mem_to_shadow(_stext),
(unsigned long)kasan_mem_to_shadow(_end),
early_pfn_to_nid(__pa(_stext)));
- kasan_populate_zero_shadow(kasan_mem_to_shadow((void *)MODULES_END),
- (void *)KASAN_SHADOW_END);
+ kasan_populate_early_shadow(kasan_mem_to_shadow((void *)MODULES_END),
+ (void *)KASAN_SHADOW_END);
load_cr3(init_top_pgt);
__flush_tlb_all();
/*
- * kasan_zero_page has been used as early shadow memory, thus it may
- * contain some garbage. Now we can clear and write protect it, since
- * after the TLB flush no one should write to it.
+ * kasan_early_shadow_page has been used as early shadow memory, thus
+ * it may contain some garbage. Now we can clear and write protect it,
+ * since after the TLB flush no one should write to it.
*/
- memset(kasan_zero_page, 0, PAGE_SIZE);
+ memset(kasan_early_shadow_page, 0, PAGE_SIZE);
for (i = 0; i < PTRS_PER_PTE; i++) {
pte_t pte;
pgprot_t prot;
@@ -380,8 +383,8 @@ void __init kasan_init(void)
prot = __pgprot(__PAGE_KERNEL_RO | _PAGE_ENC);
pgprot_val(prot) &= __default_kernel_pte_mask;
- pte = __pte(__pa(kasan_zero_page) | pgprot_val(prot));
- set_pte(&kasan_zero_pte[i], pte);
+ pte = __pte(__pa(kasan_early_shadow_page) | pgprot_val(prot));
+ set_pte(&kasan_early_shadow_pte[i], pte);
}
/* Flush TLBs again to be sure that write protection applied. */
__flush_tlb_all();
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;