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Commit 4a5a8781 authored by Vishwanath Raju K's avatar Vishwanath Raju K Committed by Archit Saxena
Browse files

arm: mm: restrict EXEC to text and init 



If CONFIG_FORCE_PAGES is enabled, DATA and RO is set
as EXEC which cause PAN feature failure. Fix it.

Change-Id: I53a09956944fa59973874af2f5f383e7aab46572
Signed-off-by: default avatarVishwanath Raju K <vishk@codeaurora.org>
parent 614c5bbf

arch/arm/mm/mmu.c

+7 −1
Original line number Diff line number Diff line
@@ -1672,7 +1672,13 @@ static noinline void __init split_pmd(pmd_t *pmd, unsigned long addr, 
	pte = start_pte;



	do {

		set_pte_ext(pte, pfn_pte(pfn, type->prot_pte), 0);

		if (((unsigned long)_stext <= addr) &&

			(addr < (unsigned long)__init_end))

			set_pte_ext(pte, pfn_pte(pfn,

				mem_types[MT_MEMORY_RWX].prot_pte), 0);

		else

			set_pte_ext(pte, pfn_pte(pfn,

				mem_types[MT_MEMORY_RW].prot_pte), 0);

		pfn++;

	} while (pte++, addr += PAGE_SIZE, addr != end);