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

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[ Upstream commit de1034b38a346ef6be25fe8792f5d1e0684d5ff4 ]

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

Signed-off-by: Andrew Bresticker <abrestic@rivosinc.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andrew Bresticker 2024-02-02 10:07:03 -08:00 committed by Greg Kroah-Hartman
parent 865f99f641
commit 4fff3d735b
2 changed files with 2 additions and 2 deletions
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2
drivers/firmware/efi/arm-runtime.c
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@ -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))

2
drivers/firmware/efi/riscv-runtime.c
View File

@ -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))