From c49f7dbd4f9c2c49df7fc0f5b50c1350ee7e01ee Mon Sep 17 00:00:00 2001
From: Jiong Wang <jiong.wang@netronome.com>
Date: Wed, 5 Dec 2018 13:52:35 -0500
Subject: [PATCH] bpf: verifier remove the rejection on BPF_ALU | BPF_ARSH
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.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
kernel/bpf/verifier.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 7658c61c1a884..2752d35ad0738 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;
--
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