Commit de1034b3 authored by Andrew Bresticker's avatar Andrew Bresticker Committed by Ard Biesheuvel
Browse files

efi: runtime: Fix potential overflow of soft-reserved region size 



md_size will have been narrowed if we have >= 4GB worth of pages in a
soft-reserved region.

Signed-off-by: default avatarAndrew Bresticker <abrestic@rivosinc.com>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent aa0e784d

drivers/firmware/efi/arm-runtime.c

+1 −1
Original line number Diff line number Diff line
@@ -107,7 +107,7 @@ static int __init arm_enable_runtime_services(void) 
		efi_memory_desc_t *md;



		for_each_efi_memory_desc(md) {

			int md_size = md->num_pages << EFI_PAGE_SHIFT;

			u64 md_size = md->num_pages << EFI_PAGE_SHIFT;

			struct resource *res;



			if (!(md->attribute & EFI_MEMORY_SP))

drivers/firmware/efi/riscv-runtime.c

+1 −1
Original line number Diff line number Diff line
@@ -85,7 +85,7 @@ static int __init riscv_enable_runtime_services(void) 
		efi_memory_desc_t *md;



		for_each_efi_memory_desc(md) {

			int md_size = md->num_pages << EFI_PAGE_SHIFT;

			u64 md_size = md->num_pages << EFI_PAGE_SHIFT;

			struct resource *res;



			if (!(md->attribute & EFI_MEMORY_SP))