[kbuild-all] net/sched/act_bpf.c:132:35: sparse: sparse: incorrect type in argument 2 (different address spaces)

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0bddd227f3dc55975e2b8dfa7fc6f959b062a2c7 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 3 weeks ago config: sh-randconfig-s031-20200709 (attached as .config) compiler: sh4-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-37-gc9676a3b-dirty git checkout 670d0a4b10704667765f7d18f7592993d02783aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sh 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 >>) net/sched/act_bpf.c:132:35: sparse: expected void const *__from net/sched/act_bpf.c:132:35: sparse: got unsigned char [noderef] __rcu * net/sched/act_bpf.c:125:50: sparse: sparse: dereference of noderef expression net/sched/act_bpf.c:125:50: sparse: sparse: dereference of noderef expression vim +132 net/sched/act_bpf.c a8cb5f556b5679 Daniel Borkmann 2015-03-20 115 a8cb5f556b5679 Daniel Borkmann 2015-03-20 116 static int tcf_bpf_dump_ebpf_info(const struct tcf_bpf *prog, a8cb5f556b5679 Daniel Borkmann 2015-03-20 117 struct sk_buff *skb) a8cb5f556b5679 Daniel Borkmann 2015-03-20 118 { 7bd509e311f408 Daniel Borkmann 2016-12-04 119 struct nlattr *nla; 7bd509e311f408 Daniel Borkmann 2016-12-04 120 a8cb5f556b5679 Daniel Borkmann 2015-03-20 121 if (prog->bpf_name && a8cb5f556b5679 Daniel Borkmann 2015-03-20 122 nla_put_string(skb, TCA_ACT_BPF_NAME, prog->bpf_name)) a8cb5f556b5679 Daniel Borkmann 2015-03-20 123 return -EMSGSIZE; a8cb5f556b5679 Daniel Borkmann 2015-03-20 124 e86283071fb0ee Daniel Borkmann 2017-06-21 125 if (nla_put_u32(skb, TCA_ACT_BPF_ID, prog->filter->aux->id)) e86283071fb0ee Daniel Borkmann 2017-06-21 126 return -EMSGSIZE; e86283071fb0ee Daniel Borkmann 2017-06-21 127 f1f7714ea51c56 Daniel Borkmann 2017-01-13 128 nla = nla_reserve(skb, TCA_ACT_BPF_TAG, sizeof(prog->filter->tag)); 7bd509e311f408 Daniel Borkmann 2016-12-04 129 if (nla == NULL) 7bd509e311f408 Daniel Borkmann 2016-12-04 130 return -EMSGSIZE; 7bd509e311f408 Daniel Borkmann 2016-12-04 131 f1f7714ea51c56 Daniel Borkmann 2017-01-13 @132 memcpy(nla_data(nla), prog->filter->tag, nla_len(nla)); 7bd509e311f408 Daniel Borkmann 2016-12-04 133 a8cb5f556b5679 Daniel Borkmann 2015-03-20 134 return 0; a8cb5f556b5679 Daniel Borkmann 2015-03-20 135 } a8cb5f556b5679 Daniel Borkmann 2015-03-20 136 :::::: The code at line 132 was first introduced by commit :::::: f1f7714ea51c56b7163fb1a5acf39c6a204dd758 bpf: rework prog_digest into prog_tag :::::: TO: Daniel Borkmann <daniel(a)iogearbox.net&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org