tree: https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git xdp-queueing-01 head: 6b5756c44933d2b55e5e59e1196ef95894203cf7 commit: b8d0d0f924c237daf55b430a85007bd41ad01d7e [1/3] Add a PIFO map type for queueing packets config: i386-randconfig-m021-20210709 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: kernel/bpf/pifomap.c:149 pifo_map_lookup_elem() error: uninitialized symbol 'pkt'. vim +/pkt +149 kernel/bpf/pifomap.c b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 140 static void *pifo_map_lookup_elem(struct bpf_map *map, void *key) b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 141 { b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 142 struct bpf_pifo_map *pifo = container_of(map, struct bpf_pifo_map, map); b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 143 struct bpf_pifo_pkt *pkt; b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 144 u32 pktid = *(u32 *)key; b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 145 b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 146 if (pktid < pifo->qsize) b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 147 pkt = &pifo->q[pktid]; Not initialized on else path. b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 148 b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 @149 return pkt ? &pkt->pkt_id : NULL; ^^^ b8d0d0f924c237 Toke Høiland-Jørgensen 2021-06-30 150 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org