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Date: Thu, 19 May 2022 13:41:42 -0700 From: Sami Tolvanen <samitolvanen@...gle.com> To: Nathan Chancellor <nathan@...nel.org> Cc: Sedat Dilek <sedat.dilek@...il.com>, LKML <linux-kernel@...r.kernel.org>, Kees Cook <keescook@...omium.org>, Josh Poimboeuf <jpoimboe@...hat.com>, Peter Zijlstra <peterz@...radead.org>, X86 ML <x86@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, Nick Desaulniers <ndesaulniers@...gle.com>, Joao Moreira <joao@...rdrivepizza.com>, Steven Rostedt <rostedt@...dmis.org>, linux-hardening@...r.kernel.org, linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, llvm@...ts.linux.dev Subject: Re: [RFC PATCH v2 00/21] KCFI support On Thu, May 19, 2022 at 1:26 PM Nathan Chancellor <nathan@...nel.org> wrote: > > On Thu, May 19, 2022 at 11:01:40AM +0200, Sedat Dilek wrote: > > On Tue, May 17, 2022 at 8:49 PM Nathan Chancellor <nathan@...nel.org> wrote: > > > I have run kCFI (v1, I haven't had time to test v2) on x86_64 hardware, > > > both AMD and Intel. I have only found two failures so far: the i915 > > > issue that I mention below and a failure in the KVM subsystem, which I > > > can see by just running QEMU: > > > > > > > Is there a fix around this issue? > > No, I mentioned it offhand to Sami in IRC but I never followed up. This > failure appears to be introduced by commit f922bd9bf33b ("KVM: Move MMU > notifier's mmu_lock acquisition into common helper"). > > Sami, do you want an issue opened around this somewhere? Yes, please file a bug. The ClangBuiltLinux Github is probably the best place. Sami
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