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powerpc64/kasan: Pass virtual addresses to kasan_init_phys_region()

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The kasan_init_phys_region() function maps shadow pages necessary for
the ranges of the linear map backed by physical pages. Currently
kasan_init_phys_region() is being passed physical addresses, but
kasan_mem_to_shadow() expects virtual addresses.

It works right now because the lower bits (12:64) of the
kasan_mem_to_shadow() calculation are the same for the real and virtual
addresses, so the actual PTE value is the same in the end. But virtual
addresses are the intended input, so fix it.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240212045020.70364-1-bgray@linux.ibm.com
This commit is contained in:
Benjamin Gray
2024-02-12 15:50:20 +11:00
committed by Michael Ellerman
parent ad679719d7
commit 295454eda9
2 changed files with 2 additions and 2 deletions
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arch/powerpc/mm/kasan/init_book3e_64.c
+1 -1
View File
@@ -112,7 +112,7 @@ void __init kasan_init(void)
pte_t zero_pte = pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL_RO);
for_each_mem_range(i, &start, &end)
kasan_init_phys_region((void *)start, (void *)end);
kasan_init_phys_region(phys_to_virt(start), phys_to_virt(end));
if (IS_ENABLED(CONFIG_KASAN_VMALLOC))
kasan_remove_zero_shadow((void *)VMALLOC_START, VMALLOC_SIZE);
arch/powerpc/mm/kasan/init_book3s_64.c
+1 -1
View File
@@ -62,7 +62,7 @@ void __init kasan_init(void)
}
for_each_mem_range(i, &start, &end)
kasan_init_phys_region((void *)start, (void *)end);
kasan_init_phys_region(phys_to_virt(start), phys_to_virt(end));
for (i = 0; i < PTRS_PER_PTE; i++)
__set_pte_at(&init_mm, (unsigned long)kasan_early_shadow_page,