[PATCH v2 6/9] riscv: bpf: Write protect JIT code
From: Jisheng Zhang <hidden>
Date: 2021-03-31 16:33:58
Also in:
linux-riscv, lkml, netdev
Subsystem:
bpf jit for risc-v (32-bit), bpf jit for risc-v (64-bit), bpf [general] (safe dynamic programs and tools), risc-v architecture, the rest · Maintainers:
Luke Nelson, Xi Wang, Björn Töpel, Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Paul Walmsley, Palmer Dabbelt, Albert Ou, Linus Torvalds
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