[kernel-hardening] [PATCH] arm64: vdso: Mark vDSO code as read-only
From: David Brown <hidden>
Date: 2016-02-13 00:31:52
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On Thu, Feb 11, 2016 at 03:19:20PM +0100, Ard Biesheuvel wrote:
quoted
diff --git a/arch/arm64/kernel/vdso/vdso.S b/arch/arm64/kernel/vdso/vdso.S index 60c1db5..db7c0f2 100644 --- a/arch/arm64/kernel/vdso/vdso.S +++ b/arch/arm64/kernel/vdso/vdso.S@@ -24,6 +24,7 @@ __PAGE_ALIGNED_DATA^^ You can get rid of this now as well
Can we? The page is getting mapped to userspace, and if we didn't page align it, we could leak kernel read-only data to every userspace process. David