FYI, we noticed the following commit (built with gcc-7): commit: 4f7b25baf0cefa88aa267e8ff60150c4ac1479ef ("bpf: sockmap, refactor sockmap routines to work with hashmap") url: https://github.com/0day-ci/linux/commits/John-Fastabend/bpf-sockmap-free-... base: https://git.kernel.org/cgit/linux/kernel/git/bpf/bpf-next.git master in testcase: kernel_selftests with following parameters: group: kselftests-00 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 4 -m 5G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): selftests: test_maps ======================================== Failed allowed duplicate programs in update ANY sockmap 0 '4:8' not ok 1..3 selftests: test_maps [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