commit cca98e9f8b5e ("mm: enforce that vmap can't map pages
executable") enforces the W^X protection by not allowing remapping
existing pages as executable. Add riscv bits so that riscv can benefit
the same protection.
Signed-off-by: Jisheng Zhang <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
Tested-by: Samuel Holland <[email protected]>
Reviewed-by: Alexandre Ghiti <[email protected]>
---
Hi Palmer,
This patch missed two merge window, I.E 6.8-rc1 and 6.9-rc1,
I'm not sure whether there's something to be done from my side.
Thanks in advance
since v1:
- rebase on v6.8-rc1
- collect Reviewed-by and Tested-by tag
arch/riscv/include/asm/pgtable.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 97fcde30e247..9f8ea0e33eb1 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -593,6 +593,12 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
return ptep_test_and_clear_young(vma, address, ptep);
}
+#define pgprot_nx pgprot_nx
+static inline pgprot_t pgprot_nx(pgprot_t _prot)
+{
+ return __pgprot(pgprot_val(_prot) & ~_PAGE_EXEC);
+}
+
#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t _prot)
{
--
2.43.0
Hello:
This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <[email protected]>:
On Mon, 25 Mar 2024 18:54:56 +0800 you wrote:
> commit cca98e9f8b5e ("mm: enforce that vmap can't map pages
> executable") enforces the W^X protection by not allowing remapping
> existing pages as executable. Add riscv bits so that riscv can benefit
> the same protection.
>
> Signed-off-by: Jisheng Zhang <[email protected]>
> Reviewed-by: Christoph Hellwig <[email protected]>
> Reviewed-by: Samuel Holland <[email protected]>
> Tested-by: Samuel Holland <[email protected]>
> Reviewed-by: Alexandre Ghiti <[email protected]>
>
> [...]
Here is the summary with links:
- [v2,RESEND] riscv: mm: implement pgprot_nx
https://git.kernel.org/riscv/c/0ffe1ae7026d
You are awesome, thank you!
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