Hi Rong, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Rong-Tao/libbpf-linker-Avoid-using-object-file-as-both-input-and-output/20241206-100435 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/tencent_B497E42A7CAF94A35B88EB060E42A2593408%40qq.com patch subject: [PATCH bpf-next v4 1/2] bpftool: Fix gen object segfault compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241211/202412111714.9jJxt9x6-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202412111714.9jJxt9x6-lkp@xxxxxxxxx/ Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): PERF_VERSION = 6.13.rc1.g228582f448e8 gen.c: In function 'do_object': >> gen.c:1927:9: warning: 'linker' may be used uninitialized [-Wmaybe-uninitialized] 1927 | bpf_linker__free(linker); | ^~~~~~~~~~~~~~~~~~~~~~~~ gen.c:1879:28: note: 'linker' was declared here 1879 | struct bpf_linker *linker; | ^~~~~~ -- gen.c: In function 'do_object': >> gen.c:1927:9: warning: 'linker' may be used uninitialized [-Wmaybe-uninitialized] 1927 | bpf_linker__free(linker); | ^~~~~~~~~~~~~~~~~~~~~~~~ gen.c:1879:28: note: 'linker' was declared here 1879 | struct bpf_linker *linker; | ^~~~~~ gen.c: In function 'do_object': >> gen.c:1927:9: warning: 'linker' may be used uninitialized [-Wmaybe-uninitialized] 1927 | bpf_linker__free(linker); | ^~~~~~~~~~~~~~~~~~~~~~~~ gen.c:1879:28: note: 'linker' was declared here 1879 | struct bpf_linker *linker; | ^~~~~~ gen.c: In function 'do_object': >> gen.c:1927:9: warning: 'linker' may be used uninitialized [-Wmaybe-uninitialized] 1927 | bpf_linker__free(linker); | ^~~~~~~~~~~~~~~~~~~~~~~~ gen.c:1879:28: note: 'linker' was declared here 1879 | struct bpf_linker *linker; | ^~~~~~ -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
