Greeting, FYI, we noticed the following commit (built with gcc-11): commit: 692616731b1a8b24ee1bb4cb63e4cb04893fffee ("[RFC PATCH] bpf: introduce new bpf map type BPF_MAP_TYPE_WILDCARD") url: https://github.com/intel-lab-lkp/linux/commits/Anton-Protopopov/bpf-introduce-new-bpf-map-type-BPF_MAP_TYPE_WILDCARD/20220907-160629 base: https://git.kernel.org/cgit/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/bpf/20220907080140.290413-1-aspsk@isovalent.com in testcase: kernel-selftests version: kernel-selftests-x86_64-700a8991-1_20220823 with following parameters: group: net test: fcnal-test.sh atomic_test: ipv4_bind 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 (Skylake) with 28G 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 | Link: https://lore.kernel.org/r/202209201337.b1efd1e4-oliver.sang@intel.com CLNG-BPF [test_maps] map_ptr_kern.bpf.o progs/map_ptr_kern.c:314:26: error: field 'trie_key' with variable sized type 'struct bpf_lpm_trie_key' not at the end of a struct or class is a GNU extension [-Werror,-Wgnu-variable-sized-type-not-at-end] struct bpf_lpm_trie_key trie_key; ^ 1 error generated. make: *** [Makefile:522: /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-692616731b1a8b24ee1bb4cb63e4cb04893fffee/tools/testing/selftests/bpf/map_ptr_kern.bpf.o] Error 1 make: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-692616731b1a8b24ee1bb4cb63e4cb04893fffee/tools/testing/selftests/bpf' To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. -- 0-DAY CI Kernel Test Service https://01.org/lkp