FYI, we noticed the following commit (built with gcc-7):

commit: 5ff9c1a3dd92d2d8eeea6bb15b3502cfcc0e26fa ("selftests: net: add in_netns.sh to TEST_PROGS")
https://git.kernel.org/cgit/linux/kernel/git/davem/net.git master

in testcase: kernel_selftests
with following parameters:

	group: kselftests-02

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: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):



ok 1..12 selftests: fib-onlink-tests.sh [PASS]
selftests: in_netns.sh
========================================
No command specified
not ok 1..13 selftests:  in_netns.sh [FAIL]


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong