Ard Biesheuvel 75fbef0a8b x86/mm: Fix NX bit clearing issue in kernel_map_pages_in_pgd ... The following commit: 15f003d207 ("x86/mm/pat: Don't implicitly allow _PAGE_RW in kernel_map_pages_in_pgd()") modified kernel_map_pages_in_pgd() to manage writable permissions of memory mappings in the EFI page table in a different way, but in the process, it removed the ability to clear NX attributes from read-only mappings, by clobbering the clear mask if _PAGE_RW is not being requested. Failure to remove the NX attribute from read-only mappings is unlikely to be a security issue, but it does prevent us from tightening the permissions in the EFI page tables going forward, so let's fix it now. Fixes: 15f003d207 ("x86/mm/pat: Don't implicitly allow _PAGE_RW in kernel_map_pages_in_pgd() Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200113172245.27925-5-ardb@kernel.org		2020-01-20 08:13:00 +01:00
..
cpa-test.c	x86/mm/pat: Move the memtype related files to arch/x86/mm/pat/	2019-12-10 10:12:55 +01:00
Makefile	x86/mm/pat: Move the memtype related files to arch/x86/mm/pat/	2019-12-10 10:12:55 +01:00
memtype_interval.c	x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h>	2019-12-10 10:12:55 +01:00
memtype.c	x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h>	2019-12-10 10:12:55 +01:00
memtype.h	x86/mm/pat: Move the memtype related files to arch/x86/mm/pat/	2019-12-10 10:12:55 +01:00
set_memory.c	x86/mm: Fix NX bit clearing issue in kernel_map_pages_in_pgd	2020-01-20 08:13:00 +01:00