tree: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master head: 63098555cfe09a633b74a3c9963769c6d4df8432 commit: a23740ec43ba022dbfd139d0fe3eff193216272b [52/54] bpf: Track contents of read-only maps as scalars config: mips-allmodconfig (attached as .config) compiler: mips-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a23740ec43ba022dbfd139d0fe3eff193216272b # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=mips If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): kernel/bpf/verifier.c: In function 'bpf_map_direct_read': ptr = (void *)addr + off; ^ vim +2756 kernel/bpf/verifier.c 2746 2747 static int bpf_map_direct_read(struct bpf_map *map, int off, int size, u64 *val) 2748 { 2749 void *ptr; 2750 u64 addr; 2751 int err; 2752 2753 err = map->ops->map_direct_value_addr(map, &addr, off); 2754 if (err) 2755 return err; 2757 2758 switch (size) { 2759 case sizeof(u8): 2760 *val = (u64)*(u8 *)ptr; 2761 break; 2762 case sizeof(u16): 2763 *val = (u64)*(u16 *)ptr; 2764 break; 2765 case sizeof(u32): 2766 *val = (u64)*(u32 *)ptr; 2767 break; 2768 case sizeof(u64): 2769 *val = *(u64 *)ptr; 2770 break; 2771 default: 2772 return -EINVAL; 2773 } 2774 return 0; 2775 } 2776 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation