selftests: add seccomp suite

This imports the existing seccomp test suite into the kernel's selftests
tree. It contains extensive testing of seccomp features and corner cases.
There remain additional tests to move into the kernel tree, but they have
not yet been ported to all the architectures seccomp supports:
https://github.com/redpig/seccomp/tree/master/testsSigned-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

MAINTAINERS

@@ -8773,6 +8773,7 @@ S:	Supported
 F:	kernel/seccomp.c
 F:	include/uapi/linux/seccomp.h
 F:	include/linux/seccomp.h
+F:	tools/testing/selftests/seccomp/*
 K:	\bsecure_computing
 K:	\bTIF_SECCOMP\b
 

tools/testing/selftests/Makefile

@@ -13,6 +13,7 @@ TARGETS += mqueue
 TARGETS += net
 TARGETS += powerpc
 TARGETS += ptrace
+TARGETS += seccomp
 TARGETS += size
 TARGETS += sysctl
 TARGETS += timers

tools/testing/selftests/seccomp/.gitignore

+seccomp_bpf

tools/testing/selftests/seccomp/Makefile

+TEST_PROGS := seccomp_bpf
+CFLAGS += -Wl,-no-as-needed -Wall
+LDFLAGS += -lpthread
+
+all: $(TEST_PROGS)
+
+include ../lib.mk
+
+clean:
+	$(RM) $(TEST_PROGS)