[PATCH 0/2] riscv: Add Spectre v1 mitigations

patchwork-bot+linux-riscv at kernel.org patchwork-bot+linux-riscv at kernel.org
Tue Dec 30 19:31:36 PST 2025


Hello:

This series was applied to riscv/linux.git (fixes)
by Paul Walmsley <pjw at kernel.org>:

On Thu, 18 Dec 2025 20:13:30 +0100 you wrote:
> This series adds Spectre v1 to RISC-V in line with x86 and arm64.
> 
> Modern RISC-V CPUs with deep pipelines (e.g., XuanTie C910, SiFive P550)
> are susceptible to Spectre v1 attacks where an attacker can speculatively
> bypass bounds checks and leak kernel memory via cache side channels.
> 
> The first patch adds pointer masking to uaccess routines. Similar to
> arm64's uaccess_mask_ptr(), this clears the top bit of user pointers
> before access, ensuring that even under speculation, a user-controlled
> pointer cannot reach kernel memory.
> 
> [...]

Here is the summary with links:
  - [1/2] riscv: Use pointer masking to limit uaccess speculation
    (no matching commit)
  - [2/2] riscv: Sanitize syscall table indexing under speculation
    https://git.kernel.org/riscv/c/25fd7ee7bf58

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html





More information about the linux-riscv mailing list