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Subject: Re: [PATCH] riscv: Fix kfence now that the linear mapping can be
 backed by PUD/P4D/PGD
Message-Id: <168623309503.19530.6891077660786418703.b4-ty@rivosinc.com>
Date:   Thu, 08 Jun 2023 07:04:55 -0700
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Cc:     syzbot+a74d57bddabbedd75135@syzkaller.appspotmail.com
From:   Palmer Dabbelt <palmer@rivosinc.com>
To:     Alexander Potapenko <glider@google.com>,
        Marco Elver <elver@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Rob Herring <robh@kernel.org>,
        Anup Patel <anup@brainfault.org>,
        Andrew Jones <ajones@ventanamicro.com>,
        kasan-dev@googlegroups.com, linux-riscv@lists.infradead.org,
        linux-kernel@vger.kernel.org,
        Alexandre Ghiti <alexghiti@rivosinc.com>
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On Tue, 06 Jun 2023 15:04:44 +0200, Alexandre Ghiti wrote:
> RISC-V Kfence implementation used to rely on the fact the linear mapping
> was backed by at most PMD hugepages, which is not true anymore since
> commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear
> mapping").
> 
> Instead of splitting PUD/P4D/PGD mappings afterwards, directly map the
> kfence pool region using PTE mappings by allocating this region before
> setup_vm_final().
> 
> [...]

Applied, thanks!

[1/1] riscv: Fix kfence now that the linear mapping can be backed by PUD/P4D/PGD
      https://git.kernel.org/palmer/c/25abe0db9243

Best regards,
-- 
Palmer Dabbelt <palmer@rivosinc.com>