From: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> Avoid cleaning the mapping table(page table) of KASAN shadow area. Cc: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> Signed-off-by: Abbott Liu <liuwenliang@xxxxxxxxxx> --- arch/arm/mm/mmu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index e46a6a4..f5aa1de 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1251,9 +1251,14 @@ static inline void prepare_page_table(void) /* * Clear out all the mappings below the kernel image. */ - for (addr = 0; addr < MODULES_VADDR; addr += PMD_SIZE) + for (addr = 0; addr < TASK_SIZE; addr += PMD_SIZE) pmd_clear(pmd_off_k(addr)); +#ifdef CONFIG_KASAN + /*TASK_SIZE ~ MODULES_VADDR is the KASAN's shadow area -- skip over it*/ + addr = MODULES_VADDR; +#endif + #ifdef CONFIG_XIP_KERNEL /* The XIP kernel is mapped in the module area -- skip over it */ addr = ((unsigned long)_exiprom + PMD_SIZE - 1) & PMD_MASK; -- 2.9.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
