linux-kernel - Re: [PATCH] riscv: Remove 32b kernel mapping from page table dump

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAAhSdy3csxeTiXgf8eKnRYhD7BM1LDLPddrn527AkA_-fiEGkw@mail.gmail.com>
Date:   Tue, 20 Apr 2021 09:49:18 +0530
From:   Anup Patel <anup@...infault.org>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Jonathan Corbet <corbet@....net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Arnd Bergmann <arnd@...db.de>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, linux-doc@...r.kernel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        kasan-dev@...glegroups.com,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [PATCH] riscv: Remove 32b kernel mapping from page table dump

On Sun, Apr 18, 2021 at 4:59 PM Alexandre Ghiti <alex@...ti.fr> wrote:
>
> The 32b kernel mapping lies in the linear mapping, there is no point in
> printing its address in page table dump, so remove this leftover that
> comes from moving the kernel mapping outside the linear mapping for 64b
> kernel.
>
> Fixes: e9efb21fe352 ("riscv: Prepare ptdump for vm layout dynamic addresses")
> Signed-off-by: Alexandre Ghiti <alex@...ti.fr>

Looks good to me.

Reviewed-by: Anup Patel <anup@...infault.org>

Regards,
Anup

> ---
>  arch/riscv/mm/ptdump.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/riscv/mm/ptdump.c b/arch/riscv/mm/ptdump.c
> index 0aba4421115c..a4ed4bdbbfde 100644
> --- a/arch/riscv/mm/ptdump.c
> +++ b/arch/riscv/mm/ptdump.c
> @@ -76,8 +76,8 @@ enum address_markers_idx {
>         PAGE_OFFSET_NR,
>  #ifdef CONFIG_64BIT
>         MODULES_MAPPING_NR,
> -#endif
>         KERNEL_MAPPING_NR,
> +#endif
>         END_OF_SPACE_NR
>  };
>
> @@ -99,8 +99,8 @@ static struct addr_marker address_markers[] = {
>         {0, "Linear mapping"},
>  #ifdef CONFIG_64BIT
>         {0, "Modules mapping"},
> -#endif
>         {0, "Kernel mapping (kernel, BPF)"},
> +#endif
>         {-1, NULL},
>  };
>
> @@ -379,8 +379,8 @@ static int ptdump_init(void)
>         address_markers[PAGE_OFFSET_NR].start_address = PAGE_OFFSET;
>  #ifdef CONFIG_64BIT
>         address_markers[MODULES_MAPPING_NR].start_address = MODULES_VADDR;
> -#endif
>         address_markers[KERNEL_MAPPING_NR].start_address = kernel_virt_addr;
> +#endif
>
>         kernel_ptd_info.base_addr = KERN_VIRT_START;
>
> --
> 2.20.1
>