[RFC bpf-next 6/7] bpf: verifier remove the rejection on BPF_ALU | BPF_ARSH

[Jiong Wang]

This patch remove the rejection on BPF_ALU | BPF_ARSH as we have supported
them on interpreter and all JIT back-ends

Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Signed-off-by: Jiong Wang <jiong.w...@netronome.com>
---
 kernel/bpf/verifier.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index ce8a1c3..8ed868e 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -3649,11 +3649,6 @@ static int check_alu_op(struct bpf_verifier_env *env, 
struct bpf_insn *insn)
                        return -EINVAL;
                }
 
-               if (opcode == BPF_ARSH && BPF_CLASS(insn->code) != BPF_ALU64) {
-                       verbose(env, "BPF_ARSH not supported for 32 bit ALU\n");
-                       return -EINVAL;
-               }
-
                if ((opcode == BPF_LSH || opcode == BPF_RSH ||
                     opcode == BPF_ARSH) && BPF_SRC(insn->code) == BPF_K) {
                        int size = BPF_CLASS(insn->code) == BPF_ALU64 ? 64 : 32;
-- 
2.7.4