tree: https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git mlx5-queue head: 46fb2d6328c851496c3bcc5e50a1e58786c83acb commit: 66d7b124a88b85fab8335567dd9c69450a9648dc [6/13] bpf: Expose struct nf_conn to BPF config: riscv-randconfig-r006-20211017 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 746dd6a700931988dd9021d3d04718f1929885a5) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git/commit/?i... git remote add saeed https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git git fetch --no-tags saeed mlx5-queue git checkout 66d7b124a88b85fab8335567dd9c69450a9648dc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from kernel/bpf/verifier.c:12: In file included from include/linux/bpf_verifier.h:9: In file included from include/linux/filter.h:11: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from kernel/bpf/verifier.c:12: In file included from include/linux/bpf_verifier.h:9: In file included from include/linux/filter.h:11: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from kernel/bpf/verifier.c:12: In file included from include/linux/bpf_verifier.h:9: In file included from include/linux/filter.h:11: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ valid = bpf_ct_is_valid_access(off, size, t, &info); ^ kernel/bpf/verifier.c:3552:11: note: did you mean 'bpf_sock_is_valid_access'? include/linux/bpf.h:2165:20: note: 'bpf_sock_is_valid_access' declared here static inline bool bpf_sock_is_valid_access(int off, int size, ^ convert_ctx_access = bpf_ct_convert_ctx_access; ^~~~~~~~~~~~~~~~~~~~~~~~~ bpf_sock_convert_ctx_access include/linux/bpf.h:2171:19: note: 'bpf_sock_convert_ctx_access' declared here static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, ^ 7 warnings and 2 errors generated. vim +/bpf_ct_is_valid_access +3552 kernel/bpf/verifier.c 3535 3536 static int check_ct_access(struct bpf_verifier_env *env, int insn_idx, 3537 u32 regno, int off, int size, enum bpf_access_type t) 3538 { 3539 struct bpf_reg_state *regs = cur_regs(env); 3540 struct bpf_reg_state *reg = &regs[regno]; 3541 struct bpf_insn_access_aux info = {}; 3542 bool valid; 3543 3544 if (reg->smin_value < 0) { 3545 verbose(env, "R%d min value is negative, either use unsigned index or do a if (index >=0) check.\n", 3546 regno); 3547 return -EACCES; 3548 } 3549 3550 switch (reg->type) { 3551 case PTR_TO_NF_CONN: 3553 break; 3554 default: 3555 valid = false; 3556 } 3557 3558 if (valid) { 3559 env->insn_aux_data[insn_idx].ctx_field_size = 3560 info.ctx_field_size; 3561 return 0; 3562 } 3563 3564 verbose(env, "R%d invalid %s access off=%d size=%d\n", 3565 regno, reg_type_str[reg->type], off, size); 3566 3567 return -EACCES; 3568 } 3569 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org