[PATCH v3 07/10] riscv: bpf: Write protect JIT code
Jisheng Zhang
jszhang3 at mail.ustc.edu.cn
Mon Apr 12 17:18:13 BST 2021
From: Jisheng Zhang <jszhang at kernel.org>
Call bpf_jit_binary_lock_ro() to write protect JIT code.
Signed-off-by: Jisheng Zhang <jszhang at 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
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