b700e7f03d
This commit introduces code for the live patching core. It implements an ftrace-based mechanism and kernel interface for doing live patching of kernel and kernel module functions. It represents the greatest common functionality set between kpatch and kgraft and can accept patches built using either method. This first version does not implement any consistency mechanism that ensures that old and new code do not run together. In practice, ~90% of CVEs are safe to apply in this way, since they simply add a conditional check. However, any function change that can not execute safely with the old version of the function can _not_ be safely applied in this version. [ jkosina@suse.cz: due to the number of contributions that got folded into this original patch from Seth Jennings, add SUSE's copyright as well, as discussed via e-mail ] Signed-off-by: Seth Jennings <sjenning@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Reviewed-by: Petr Mladek <pmladek@suse.cz> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Petr Mladek <pmladek@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
208 lines
7.3 KiB
Makefile
208 lines
7.3 KiB
Makefile
#
|
|
# Makefile for the linux kernel.
|
|
#
|
|
|
|
obj-y = fork.o exec_domain.o panic.o \
|
|
cpu.o exit.o softirq.o resource.o \
|
|
sysctl.o sysctl_binary.o capability.o ptrace.o user.o \
|
|
signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
|
|
extable.o params.o \
|
|
kthread.o sys_ni.o nsproxy.o \
|
|
notifier.o ksysfs.o cred.o reboot.o \
|
|
async.o range.o groups.o smpboot.o
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
# Do not trace debug files and internal ftrace files
|
|
CFLAGS_REMOVE_cgroup-debug.o = -pg
|
|
CFLAGS_REMOVE_irq_work.o = -pg
|
|
endif
|
|
|
|
# cond_syscall is currently not LTO compatible
|
|
CFLAGS_sys_ni.o = $(DISABLE_LTO)
|
|
|
|
obj-y += sched/
|
|
obj-y += locking/
|
|
obj-y += power/
|
|
obj-y += printk/
|
|
obj-y += irq/
|
|
obj-y += rcu/
|
|
obj-y += livepatch/
|
|
|
|
obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
|
|
obj-$(CONFIG_FREEZER) += freezer.o
|
|
obj-$(CONFIG_PROFILING) += profile.o
|
|
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
|
obj-y += time/
|
|
obj-$(CONFIG_FUTEX) += futex.o
|
|
ifeq ($(CONFIG_COMPAT),y)
|
|
obj-$(CONFIG_FUTEX) += futex_compat.o
|
|
endif
|
|
obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
|
|
obj-$(CONFIG_SMP) += smp.o
|
|
ifneq ($(CONFIG_SMP),y)
|
|
obj-y += up.o
|
|
endif
|
|
obj-$(CONFIG_UID16) += uid16.o
|
|
obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
|
|
obj-$(CONFIG_MODULES) += module.o
|
|
obj-$(CONFIG_MODULE_SIG) += module_signing.o
|
|
obj-$(CONFIG_KALLSYMS) += kallsyms.o
|
|
obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
|
|
obj-$(CONFIG_KEXEC) += kexec.o
|
|
obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
|
|
obj-$(CONFIG_COMPAT) += compat.o
|
|
obj-$(CONFIG_CGROUPS) += cgroup.o
|
|
obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
|
|
obj-$(CONFIG_CPUSETS) += cpuset.o
|
|
obj-$(CONFIG_UTS_NS) += utsname.o
|
|
obj-$(CONFIG_USER_NS) += user_namespace.o
|
|
obj-$(CONFIG_PID_NS) += pid_namespace.o
|
|
obj-$(CONFIG_IKCONFIG) += configs.o
|
|
obj-$(CONFIG_SMP) += stop_machine.o
|
|
obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
|
|
obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
|
|
obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
|
|
obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
|
|
obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
|
|
obj-$(CONFIG_GCOV_KERNEL) += gcov/
|
|
obj-$(CONFIG_KPROBES) += kprobes.o
|
|
obj-$(CONFIG_KGDB) += debug/
|
|
obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
|
|
obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
|
|
obj-$(CONFIG_SECCOMP) += seccomp.o
|
|
obj-$(CONFIG_RELAY) += relay.o
|
|
obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
|
|
obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
|
|
obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
|
|
obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
|
|
obj-$(CONFIG_LATENCYTOP) += latencytop.o
|
|
obj-$(CONFIG_BINFMT_ELF) += elfcore.o
|
|
obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
|
|
obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
|
|
obj-$(CONFIG_FUNCTION_TRACER) += trace/
|
|
obj-$(CONFIG_TRACING) += trace/
|
|
obj-$(CONFIG_TRACE_CLOCK) += trace/
|
|
obj-$(CONFIG_RING_BUFFER) += trace/
|
|
obj-$(CONFIG_TRACEPOINTS) += trace/
|
|
obj-$(CONFIG_IRQ_WORK) += irq_work.o
|
|
obj-$(CONFIG_CPU_PM) += cpu_pm.o
|
|
obj-$(CONFIG_BPF) += bpf/
|
|
|
|
obj-$(CONFIG_PERF_EVENTS) += events/
|
|
|
|
obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
|
|
obj-$(CONFIG_PADATA) += padata.o
|
|
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
|
|
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
|
|
obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
|
|
obj-$(CONFIG_TORTURE_TEST) += torture.o
|
|
|
|
$(obj)/configs.o: $(obj)/config_data.h
|
|
|
|
# config_data.h contains the same information as ikconfig.h but gzipped.
|
|
# Info from config_data can be extracted from /proc/config*
|
|
targets += config_data.gz
|
|
$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
|
|
$(call if_changed,gzip)
|
|
|
|
filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;")
|
|
targets += config_data.h
|
|
$(obj)/config_data.h: $(obj)/config_data.gz FORCE
|
|
$(call filechk,ikconfiggz)
|
|
|
|
###############################################################################
|
|
#
|
|
# Roll all the X.509 certificates that we can find together and pull them into
|
|
# the kernel so that they get loaded into the system trusted keyring during
|
|
# boot.
|
|
#
|
|
# We look in the source root and the build root for all files whose name ends
|
|
# in ".x509". Unfortunately, this will generate duplicate filenames, so we
|
|
# have make canonicalise the pathnames and then sort them to discard the
|
|
# duplicates.
|
|
#
|
|
###############################################################################
|
|
ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
|
|
X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
|
|
X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
|
|
X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
|
|
$(or $(realpath $(CERT)),$(CERT))))
|
|
X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))
|
|
|
|
ifeq ($(X509_CERTIFICATES),)
|
|
$(warning *** No X.509 certificates found ***)
|
|
endif
|
|
|
|
ifneq ($(wildcard $(obj)/.x509.list),)
|
|
ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
|
|
$(info X.509 certificate list changed)
|
|
$(shell rm $(obj)/.x509.list)
|
|
endif
|
|
endif
|
|
|
|
kernel/system_certificates.o: $(obj)/x509_certificate_list
|
|
|
|
quiet_cmd_x509certs = CERTS $@
|
|
cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; echo " - Including cert $(X509)")
|
|
|
|
targets += $(obj)/x509_certificate_list
|
|
$(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
|
|
$(call if_changed,x509certs)
|
|
|
|
targets += $(obj)/.x509.list
|
|
$(obj)/.x509.list:
|
|
@echo $(X509_CERTIFICATES) >$@
|
|
endif
|
|
|
|
clean-files := x509_certificate_list .x509.list
|
|
|
|
ifeq ($(CONFIG_MODULE_SIG),y)
|
|
###############################################################################
|
|
#
|
|
# If module signing is requested, say by allyesconfig, but a key has not been
|
|
# supplied, then one will need to be generated to make sure the build does not
|
|
# fail and that the kernel may be used afterwards.
|
|
#
|
|
###############################################################################
|
|
ifndef CONFIG_MODULE_SIG_HASH
|
|
$(error Could not determine digest type to use from kernel config)
|
|
endif
|
|
|
|
signing_key.priv signing_key.x509: x509.genkey
|
|
@echo "###"
|
|
@echo "### Now generating an X.509 key pair to be used for signing modules."
|
|
@echo "###"
|
|
@echo "### If this takes a long time, you might wish to run rngd in the"
|
|
@echo "### background to keep the supply of entropy topped up. It"
|
|
@echo "### needs to be run as root, and uses a hardware random"
|
|
@echo "### number generator if one is available."
|
|
@echo "###"
|
|
openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
|
|
-batch -x509 -config x509.genkey \
|
|
-outform DER -out signing_key.x509 \
|
|
-keyout signing_key.priv 2>&1
|
|
@echo "###"
|
|
@echo "### Key pair generated."
|
|
@echo "###"
|
|
|
|
x509.genkey:
|
|
@echo Generating X.509 key generation config
|
|
@echo >x509.genkey "[ req ]"
|
|
@echo >>x509.genkey "default_bits = 4096"
|
|
@echo >>x509.genkey "distinguished_name = req_distinguished_name"
|
|
@echo >>x509.genkey "prompt = no"
|
|
@echo >>x509.genkey "string_mask = utf8only"
|
|
@echo >>x509.genkey "x509_extensions = myexts"
|
|
@echo >>x509.genkey
|
|
@echo >>x509.genkey "[ req_distinguished_name ]"
|
|
@echo >>x509.genkey "O = Magrathea"
|
|
@echo >>x509.genkey "CN = Glacier signing key"
|
|
@echo >>x509.genkey "emailAddress = slartibartfast@magrathea.h2g2"
|
|
@echo >>x509.genkey
|
|
@echo >>x509.genkey "[ myexts ]"
|
|
@echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
|
|
@echo >>x509.genkey "keyUsage=digitalSignature"
|
|
@echo >>x509.genkey "subjectKeyIdentifier=hash"
|
|
@echo >>x509.genkey "authorityKeyIdentifier=keyid"
|
|
endif
|