Now that the zboot loader will invoke the EFI memory attributes protocol to remap the decompressed code and rodata as read-only/executable, we can set the PE/COFF header flag that indicates to the firmware that the application does not rely on writable memory being executable at the same time.
Cc: stable@vger.kernel.org # v6.2+ Signed-off-by: Ard Biesheuvel ardb@kernel.org --- drivers/firmware/efi/libstub/zboot-header.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/firmware/efi/libstub/zboot-header.S b/drivers/firmware/efi/libstub/zboot-header.S index ec4525d40e0cf6d6..445cb646eaaaf1c6 100644 --- a/drivers/firmware/efi/libstub/zboot-header.S +++ b/drivers/firmware/efi/libstub/zboot-header.S @@ -63,7 +63,7 @@ __efistub_efi_zboot_header: .long .Lefi_header_end - .Ldoshdr .long 0 .short IMAGE_SUBSYSTEM_EFI_APPLICATION - .short 0 + .short IMAGE_DLL_CHARACTERISTICS_NX_COMPAT #ifdef CONFIG_64BIT .quad 0, 0, 0, 0 #else