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Message-ID: <20190425163650.GB5199@zn.tnic> Date: Thu, 25 Apr 2019 18:36:50 +0200 From: Borislav Petkov <bp@...en8.de> To: Rick Edgecombe <rick.p.edgecombe@...el.com> Cc: Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org, x86@...nel.org, hpa@...or.com, Thomas Gleixner <tglx@...utronix.de>, Nadav Amit <nadav.amit@...il.com>, Dave Hansen <dave.hansen@...ux.intel.com>, Peter Zijlstra <peterz@...radead.org>, linux_dti@...oud.com, linux-integrity@...r.kernel.org, linux-security-module@...r.kernel.org, akpm@...ux-foundation.org, kernel-hardening@...ts.openwall.com, linux-mm@...ck.org, will.deacon@....com, ard.biesheuvel@...aro.org, kristen@...ux.intel.com, deneen.t.dock@...el.com, Nadav Amit <namit@...are.com> Subject: Re: [PATCH v4 04/23] x86/mm: Save DRs when loading a temporary mm > Subject: Re: [PATCH v4 04/23] x86/mm: Save DRs when loading a temporary mm s/DRs/debug registers/ On Mon, Apr 22, 2019 at 11:57:46AM -0700, Rick Edgecombe wrote: > From: Nadav Amit <namit@...are.com> > > Prevent user watchpoints from mistakenly firing while the temporary mm > is being used. As the addresses that of the temporary mm might overlap s/that // > those of the user-process, this is necessary to prevent wrong signals > or worse things from happening. > > Cc: Andy Lutomirski <luto@...nel.org> > Signed-off-by: Nadav Amit <namit@...are.com> > Signed-off-by: Rick Edgecombe <rick.p.edgecombe@...el.com> > --- > arch/x86/include/asm/mmu_context.h | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.
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