From 268a78404973594d1a7ec3a2b6a2474e0543a435 Mon Sep 17 00:00:00 2001 From: Philipp Rudo Date: Tue, 26 Mar 2019 15:45:53 +0100 Subject: s390/kexec_file: Disable kexec_load when IPLed secure A kernel loaded via kexec_load cannot be verified. Thus disable kexec_load systemcall in kernels which where IPLed securely. Use the IMA mechanism to do so. Signed-off-by: Philipp Rudo Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/Makefile | 2 ++ arch/s390/kernel/ima_arch.c | 14 ++++++++++++++ 2 files changed, 16 insertions(+) create mode 100644 arch/s390/kernel/ima_arch.c (limited to 'arch/s390') diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 1222db6d4ee9..d28acd7ba81e 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -77,6 +77,8 @@ obj-$(CONFIG_JUMP_LABEL) += jump_label.o obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o obj-$(CONFIG_KEXEC_FILE) += kexec_elf.o +obj-$(CONFIG_IMA) += ima_arch.o + obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_cpum_cf_common.o obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf.o perf_cpum_sf.o obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf_events.o perf_regs.o diff --git a/arch/s390/kernel/ima_arch.c b/arch/s390/kernel/ima_arch.c new file mode 100644 index 000000000000..f3c3e6e1c5d3 --- /dev/null +++ b/arch/s390/kernel/ima_arch.c @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +bool arch_ima_get_secureboot(void) +{ + return ipl_secure_flag; +} + +const char * const *arch_get_ima_policy(void) +{ + return NULL; +} -- cgit v1.2.3-59-g8ed1b