FYI, we noticed the following commit (built with gcc-7): commit: 2ee567d31a5812cf93c0ec943b142de252ce1cff ("KVM: selftests: enable pgste option for the linker on s390") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: kernel_selftests with following parameters: group: kselftests-01 test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel. test-url: https://www.kernel.org/doc/Documentation/kselftest.txt on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 8G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <rong.a.chen(a)intel.com&gt; 2019-05-31 18:25:21 make run_tests -C kvm make: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm' make --no-builtin-rules ARCH=x86 -C ../../../.. headers_install make[1]: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff' make[1]: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff' gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib -Iinclude/x86_64 -I.. -c lib/assert.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/assert.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib -Iinclude/x86_64 -I.. -c lib/elf.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/elf.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib -Iinclude/x86_64 -I.. -c lib/io.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/io.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib -Iinclude/x86_64 -I.. -c lib/kvm_util.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/kvm_util.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib -Iinclude/x86_64 -I.. -c lib/ucall.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/ucall.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib -Iinclude/x86_64 -I.. -c lib/sparsebit.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/sparsebit.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib/x86_64 -Iinclude/x86_64 -I.. -c lib/x86_64/processor.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/x86_64/processor.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ilib/x86_64 -Iinclude/x86_64 -I.. -c lib/x86_64/vmx.c -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/x86_64/vmx.o ar crs /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/libkvm.a /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/assert.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/elf.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/io.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/kvm_util.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/ucall.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/sparsebit.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/x86_64/processor.o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/lib/x86_64/vmx.o gcc -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I../../../../tools/include -I../../../../usr/include/ -Iinclude -Ix86_64 -Iinclude/x86_64 -I.. -pthread -no-pie -Wl,--s390-pgste x86_64/platform_info_test.c /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/libkvm.a -o /usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/x86_64/platform_info_test /usr/bin/ld: unrecognized option '--s390-pgste' /usr/bin/ld: use the --help option for usage information collect2: error: ld returned 1 exit status ../lib.mk:138: recipe for target '/usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/x86_64/platform_info_test' failed make: *** [/usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm/x86_64/platform_info_test] Error 1 make: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.6-2ee567d31a5812cf93c0ec943b142de252ce1cff/tools/testing/selftests/kvm' To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Rong Chen