kernel/bpf/verifier.c

6977 	int load_reg;
7044 			load_reg = BPF_REG_0;
7046 			load_reg = insn->src_reg;
7049 		err = check_reg_arg(env, load_reg, DST_OP);
7056 		load_reg = -1;
7064 	if (!err && load_reg >= 0)
7066 				       BPF_SIZE(insn->code), BPF_READ, load_reg,
18817 		int load_reg;
18820 		load_reg = insn_def_regno(&insn);
18830 			if (load_reg == -1)
18837 			if (is_reg64(env, &insn, load_reg, NULL, DST_OP)) {
18852 			rnd_hi32_patch[3].dst_reg = load_reg;
18875 		if (WARN_ON(load_reg == -1)) {
18881 		zext_patch[1].dst_reg = load_reg;
18882 		zext_patch[1].src_reg = load_reg;