tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 6147c83fd749d19a0d3ccc2f64d12138ab010b47 commit: 5329722057d41aebc31e391907a501feaa42f7d9 [3828/8750] bpf: Assign ID to vmlinux BTF and return extra info for BTF in GET_OBJ_INFO config: csky-randconfig-s032-20201127 (attached as .config) compiler: csky-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: v0.6.3-151-g540c2c4b-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5329722057d41aebc31e391907a501feaa42f7d9 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 5329722057d41aebc31e391907a501feaa42f7d9 # 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=csky If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> "sparse warnings: (new ones prefixed by >>)" kernel/bpf/btf.c:2535:17: sparse: sparse: Using plain integer as NULL pointer kernel/bpf/btf.c:2537:17: sparse: sparse: Using plain integer as NULL pointer kernel/bpf/btf.c:3314:17: sparse: sparse: Using plain integer as NULL pointer kernel/bpf/btf.c:3655:9: sparse: sparse: Using plain integer as NULL pointer >> kernel/bpf/btf.c:5603:29: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected char *__pu_addr @@ got char [noderef] __user * @@ >> kernel/bpf/btf.c:5603:29: sparse: expected char *__pu_addr >> kernel/bpf/btf.c:5603:29: sparse: got char [noderef] __user * kernel/bpf/btf.c:5611:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned int *__pu_addr @@ got unsigned int [noderef] __user * @@ kernel/bpf/btf.c:5611:13: sparse: expected unsigned int *__pu_addr kernel/bpf/btf.c:5611:13: sparse: got unsigned int [noderef] __user * vim +5603 kernel/bpf/btf.c 5556 5557 int btf_get_info_by_fd(const struct btf *btf, 5558 const union bpf_attr *attr, 5559 union bpf_attr __user *uattr) 5560 { 5561 struct bpf_btf_info __user *uinfo; 5562 struct bpf_btf_info info; 5563 u32 info_copy, btf_copy; 5564 void __user *ubtf; 5565 char __user *uname; 5566 u32 uinfo_len, uname_len, name_len; 5567 int ret = 0; 5568 5569 uinfo = u64_to_user_ptr(attr->info.info); 5570 uinfo_len = attr->info.info_len; 5571 5572 info_copy = min_t(u32, uinfo_len, sizeof(info)); 5573 memset(&info, 0, sizeof(info)); 5574 if (copy_from_user(&info, uinfo, info_copy)) 5575 return -EFAULT; 5576 5577 info.id = btf->id; 5578 ubtf = u64_to_user_ptr(info.btf); 5579 btf_copy = min_t(u32, btf->data_size, info.btf_size); 5580 if (copy_to_user(ubtf, btf->data, btf_copy)) 5581 return -EFAULT; 5582 info.btf_size = btf->data_size; 5583 5584 info.kernel_btf = btf->kernel_btf; 5585 5586 uname = u64_to_user_ptr(info.name); 5587 uname_len = info.name_len; 5588 if (!uname ^ !uname_len) 5589 return -EINVAL; 5590 5591 name_len = strlen(btf->name); 5592 info.name_len = name_len; 5593 5594 if (uname) { 5595 if (uname_len >= name_len + 1) { 5596 if (copy_to_user(uname, btf->name, name_len + 1)) 5597 return -EFAULT; 5598 } else { 5599 char zero = '\0'; 5600 5601 if (copy_to_user(uname, btf->name, uname_len - 1)) 5602 return -EFAULT; > 5603 if (put_user(zero, uname + uname_len - 1)) 5604 return -EFAULT; 5605 /* let user-space know about too short buffer */ 5606 ret = -ENOSPC; 5607 } 5608 } 5609 5610 if (copy_to_user(uinfo, &info, info_copy) || 5611 put_user(info_copy, &uattr->info.info_len)) 5612 return -EFAULT; 5613 5614 return ret; 5615 } 5616 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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