Commit 395e942d authored by Simon Wang's avatar Simon Wang Committed by Daniel Borkmann
Browse files

bpf: Replace hard-coded 0 with BPF_K in check_alu_op 



Enhance readability a bit.

Signed-off-by: default avatarSimon Wang <wangchuanguo@inspur.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20220622031923.65692-1-wangchuanguo@inspur.com
parent 6dc7a0ba

kernel/bpf/verifier.c

+1 −1
Original line number Diff line number Diff line
@@ -9096,7 +9096,7 @@ static int check_alu_op(struct bpf_verifier_env *env, struct bpf_insn *insn) 


	if (opcode == BPF_END || opcode == BPF_NEG) {

		if (opcode == BPF_NEG) {

			if (BPF_SRC(insn->code) != 0 ||

			if (BPF_SRC(insn->code) != BPF_K ||

			    insn->src_reg != BPF_REG_0 ||

			    insn->off != 0 || insn->imm != 0) {

				verbose(env, "BPF_NEG uses reserved fields\n");