[PATCH v2] riscv: mm: Ensure prot of VM_WRITE and VM_EXEC must be readable

[patchwork-bot+linux-riscv at kernel.org]

Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer at rivosinc.com>:

On Tue, 25 Apr 2023 18:28:28 +0800 you wrote:
> From: Hsieh-Tseng Shen <woodrow.shen at sifive.com>
> 
> Commit 8aeb7b17f04e ("RISC-V: Make mmap() with PROT_WRITE imply PROT_READ")
> allows riscv to use mmap with PROT_WRITE only, and meanwhile mmap with w+x
> is also permitted. However, when userspace tries to access this page with
> PROT_WRITE|PROT_EXEC, which causes infinite loop at load page fault as
> well as it triggers soft lockup. According to riscv privileged spec,
> "Writable pages must also be marked readable". The fix to drop the
> `PAGE_COPY_READ_EXEC` and then `PAGE_COPY_EXEC` would be just used instead.
> This aligns the other arches (i.e arm64) for protection_map.
> 
> [...]

Here is the summary with links:
  - [v2] riscv: mm: Ensure prot of VM_WRITE and VM_EXEC must be readable
    https://git.kernel.org/riscv/c/6569fc12e442

You are awesome, thank you!
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