[v3,07/10] riscv: bpf: Write protect JIT code

Commit Message

Jisheng Zhang April 12, 2021, 4:18 p.m. UTC

From: Jisheng Zhang <[e-mail]>

Call bpf_jit_binary_lock_ro() to write protect JIT code.

Signed-off-by: Jisheng Zhang <[e-mail]>
---
 arch/riscv/net/bpf_jit_core.c | 1 +
 1 file changed, 1 insertion(+)

Patch

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);