Messages in this thread | | | From | Sami Tolvanen <> | Date | Mon, 4 Nov 2019 15:42:09 -0800 | Subject | Re: [PATCH v4 10/17] arm64: disable kretprobes with SCS |
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On Mon, Nov 4, 2019 at 9:05 AM Mark Rutland <mark.rutland@arm.com> wrote: > I'm a bit confused as to why that's the case -- could you please > elaborate on how this is incompatible? > > IIUC kretrobes works by patching the function entry point with a BRK, so > that it can modify the LR _before_ it is saved to the stack. I don't see > how SCS affects that.
You're correct. While this may not be optimal for reducing attack surface, I just tested this to confirm that there's no functional conflict. I'll drop this and related patches from v5.
Sami
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