Re: [PATCH v26 6/9] x86/vdso: Insert endbr32/endbr64 to vDSO
From: Kees Cook <hidden>
Date: 2021-04-28 20:39:08
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linux-arch, linux-doc, linux-mm, lkml
On Tue, Apr 27, 2021 at 01:47:17PM -0700, Yu-cheng Yu wrote:
From: "H.J. Lu" <redacted> When Indirect Branch Tracking (IBT) is enabled, vDSO functions may be called indirectly, and must have ENDBR32 or ENDBR64 as the first instruction. The compiler must support -fcf-protection=branch so that it can be used to compile vDSO. Signed-off-by: H.J. Lu <redacted>
Reviewed-by: Kees Cook <redacted> -- Kees Cook