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Date:   Tue, 13 Apr 2021 00:18:13 +0800
From:   Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
To:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
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        Dmitry Vyukov <dvyukov@google.com>,
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        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
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        KP Singh <kpsingh@kernel.org>,
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        Xi Wang <xi.wang@gmail.com>, Anup Patel <anup@brainfault.org>
Cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 07/10] riscv: bpf: Write protect JIT code
Message-ID: <20210413001813.36b397bc@xhacker>
In-Reply-To: <20210413001110.7209bae6@xhacker>
References: <20210413001110.7209bae6@xhacker>
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From: Jisheng Zhang <jszhang@kernel.org>

Call bpf_jit_binary_lock_ro() to write protect JIT code.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 arch/riscv/net/bpf_jit_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c
index 3630d447352c..40d5bf113fee 100644
--- a/arch/riscv/net/bpf_jit_core.c
+++ b/arch/riscv/net/bpf_jit_core.c
@@ -152,6 +152,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
 	bpf_flush_icache(jit_data->header, ctx->insns + ctx->ninsns);
 
 	if (!prog->is_func || extra_pass) {
+		bpf_jit_binary_lock_ro(jit_data->header);
 out_offset:
 		kfree(ctx->offset);
 		kfree(jit_data);
-- 
2.31.0