Hi Lina, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 521a547ced6477c54b4b0cc206000406c221b4d6 commit: edae34a3ed9293b5077dddf9e51a3d86c95dc76a selftests net: add UDP GRO fraglist + bpf self-tests date: 4 months ago compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce: # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=edae34a3ed9293b5077dddf9e51a3d86c95dc76a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout edae34a3ed9293b5077dddf9e51a3d86c95dc76a make O=/tmp/kselftest headers make O=/tmp/kselftest -C tools/testing/selftests If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All errors (new ones prefixed by >>): >> error: unable to open output file 'kselftest/net/bpf/nat6to4.o': 'No such file or directory' 1 error generated. -- 0-DAY CI Kernel Test Service https://01.org/lkp