tree: https://android.googlesource.com/kernel/common android-4.14-stable head: 620d928acca50c8ba013554fc798dcf8b8910918 commit: 9e61c87b1f47b4dc3d48de83d85e9f17c320f91e [16583/25375] UPSTREAM: bpf: multi program support for cgroup+bpf config: i386-randconfig-s001-20211101 (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.14-stable git checkout 9e61c87b1f47b4dc3d48de83d85e9f17c320f91e # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/bpf/core.c:1095:43: sparse: sparse: arithmetics on pointers to functions kernel/bpf/core.c:1500:31: sparse: expected struct bpf_prog_array [noderef] <asn:4> * kernel/bpf/core.c:1500:31: sparse: got void * kernel/bpf/core.c:1504:17: sparse: expected struct bpf_prog_array [noderef] <asn:4> * kernel/bpf/core.c:1504:17: sparse: got struct bpf_prog_array * kernel/bpf/core.c:1512:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct callback_head *head @@ got struct callback_head [noderef] <asn:4> * @@ kernel/bpf/core.c:1512:9: sparse: expected struct callback_head *head kernel/bpf/core.c:1512:9: sparse: got struct callback_head [noderef] <asn:4> * kernel/bpf/core.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/bpf.h, ...): include/trace/events/bpf.h:56:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/bpf.h:92:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/bpf.h:117:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/bpf.h:188:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/bpf.h:228:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/bpf.h:282:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/bpf.h:312:1: sparse: sparse: Using plain integer as NULL pointer kernel/bpf/core.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/xdp.h, ...): include/trace/events/xdp.h:28:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/xdp.h:53:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/xdp.h:111:1: sparse: sparse: Using plain integer as NULL pointer include/trace/events/xdp.h:126:1: sparse: sparse: Using plain integer as NULL pointer vim +1500 kernel/bpf/core.c 1496 1497 struct bpf_prog_array __rcu *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags) 1498 { 1499 if (prog_cnt) 1501 sizeof(struct bpf_prog *) * (prog_cnt + 1), 1502 flags); 1503 1505 } 1506 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org