On Wed, 2018-01-24 at 16:53 -0800, Dexuan-Linux Cui wrote: > On Wed, Jan 10, 2018 at 2:53 PM, Woodhouse, David <dwmw@xxxxxxxxxxxx> wrote: > > > > On Thu, 2018-01-11 at 01:34 +0300, Alexey Dobriyan wrote: > > > > > > > > > Bisection points to > > > > > > f3433c1010c6af61c9897f0f0447f81b991feac1 is the first bad commit > > > commit f3433c1010c6af61c9897f0f0447f81b991feac1 > > > Author: David Woodhouse <dwmw@xxxxxxxxxxxx> > > > Date: Tue Jan 9 14:43:11 2018 +0000 > > > > > > x86/retpoline/entry: Convert entry assembler indirect jumps > > Thanks. We've fixed the underlying problem with the alternatives > > mechanism, *and* changed the retpoline code not to actually rely on > > said fix. > Hi David and all, > It looks the latest upstream tree did fix the issue. > Can you please specify the related commit(s) that fixed the issue? > I need to cherry-pick the fix. I suppose a quick reply from you would save > me a lot of time. :-) Hi Dexuan, The above commit didn't ever make it into Linus' tree in that form; the issues were fixed beforehand. So there isn't a subsequent commit that fixes it. I think it might have just been removing some .align 16 from nospec-branch.h? The correct version has been backported to 4.9 and 4.4 releases already; if you pulled in an early version directly from tip/x86/pti then I'd recommend you drop it and pull in the real version instead.
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