Messages in this thread | | | Date | Tue, 5 Nov 2019 09:04:26 +0000 | From | Mark Rutland <> | Subject | Re: [PATCH v4 10/17] arm64: disable kretprobes with SCS |
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On Mon, Nov 04, 2019 at 03:42:09PM -0800, Sami Tolvanen wrote: > 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.
Great; thanks for confirming!
Mark.
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