From: Anup Patel <anup@brainfault.org>
To: Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
Cc: "Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Andrey Ryabinin" <ryabinin.a.a@gmail.com>,
"Alexander Potapenko" <glider@google.com>,
"Andrey Konovalov" <andreyknvl@gmail.com>,
"Dmitry Vyukov" <dvyukov@google.com>,
"Björn Töpel" <bjorn@kernel.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Song Liu" <songliubraving@fb.com>, "Yonghong Song" <yhs@fb.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"KP Singh" <kpsingh@kernel.org>,
"Luke Nelson" <luke.r.nels@gmail.com>,
"Xi Wang" <xi.wang@gmail.com>,
linux-riscv <linux-riscv@lists.infradead.org>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>,
kasan-dev@googlegroups.com, netdev@vger.kernel.org,
bpf@vger.kernel.org
Subject: Re: [PATCH v2 5/9] riscv: kprobes: Implement alloc_insn_page()
Date: Fri, 2 Apr 2021 09:46:24 +0530 [thread overview]
Message-ID: <CAAhSdy1qcNBy-o8NAho-bhJY1FOF_DCiQ37XX+FEiBbYqokxhA@mail.gmail.com> (raw)
In-Reply-To: <20210401002724.794b3bc4@xhacker>
On Wed, Mar 31, 2021 at 10:02 PM Jisheng Zhang
<jszhang3@mail.ustc.edu.cn> wrote:
>
> From: Jisheng Zhang <jszhang@kernel.org>
>
> Allocate PAGE_KERNEL_READ_EXEC(read only, executable) page for kprobes
> insn page. This is to prepare for STRICT_MODULE_RWX.
>
> Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Looks good to me.
Reviewed-by: Anup Patel <anup@brainfault.org>
Regards,
Anup
> ---
> arch/riscv/kernel/probes/kprobes.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
> index 7e2c78e2ca6b..8c1f7a30aeed 100644
> --- a/arch/riscv/kernel/probes/kprobes.c
> +++ b/arch/riscv/kernel/probes/kprobes.c
> @@ -84,6 +84,14 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
> return 0;
> }
>
> +void *alloc_insn_page(void)
> +{
> + return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END,
> + GFP_KERNEL, PAGE_KERNEL_READ_EXEC,
> + VM_FLUSH_RESET_PERMS, NUMA_NO_NODE,
> + __builtin_return_address(0));
> +}
> +
> /* install breakpoint in text */
> void __kprobes arch_arm_kprobe(struct kprobe *p)
> {
> --
> 2.31.0
>
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2021-04-02 4:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 16:24 [PATCH v2 0/9] riscv: improve self-protection Jisheng Zhang
2021-03-31 16:25 ` [PATCH v2 1/9] riscv: add __init section marker to some functions Jisheng Zhang
2021-04-02 4:08 ` Anup Patel
2021-04-12 5:37 ` Jisheng Zhang
2021-03-31 16:25 ` [PATCH v2 2/9] riscv: Mark some global variables __ro_after_init Jisheng Zhang
2021-04-02 4:09 ` Anup Patel
2021-03-31 16:26 ` [PATCH v2 3/9] riscv: Constify sys_call_table Jisheng Zhang
2021-04-02 4:11 ` Anup Patel
2021-03-31 16:26 ` [PATCH v2 4/9] riscv: Constify sbi_ipi_ops Jisheng Zhang
2021-04-02 4:12 ` Anup Patel
2021-03-31 16:27 ` [PATCH v2 5/9] riscv: kprobes: Implement alloc_insn_page() Jisheng Zhang
2021-04-02 4:16 ` Anup Patel [this message]
2021-03-31 16:27 ` [PATCH v2 6/9] riscv: bpf: Write protect JIT code Jisheng Zhang
2021-03-31 16:28 ` [PATCH v2 7/9] riscv: bpf: Avoid breaking W^X on RV64 Jisheng Zhang
2021-03-31 16:29 ` [PATCH v2 8/9] riscv: module: Create module allocations without exec permissions Jisheng Zhang
2021-04-02 4:18 ` Anup Patel
2021-03-31 16:29 ` [PATCH v2 9/9] riscv: Set ARCH_HAS_STRICT_MODULE_RWX if MMU Jisheng Zhang
2021-04-02 4:14 ` Anup Patel
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