From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f69.google.com (mail-wm0-f69.google.com [74.125.82.69]) by kanga.kvack.org (Postfix) with ESMTP id 512246B04C6 for ; Thu, 4 Jan 2018 01:57:29 -0500 (EST) Received: by mail-wm0-f69.google.com with SMTP id n13so455401wmc.3 for ; Wed, 03 Jan 2018 22:57:29 -0800 (PST) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id m128sor753895wmm.76.2018.01.03.22.57.27 for (Google Transport Security); Wed, 03 Jan 2018 22:57:27 -0800 (PST) Date: Thu, 4 Jan 2018 07:57:24 +0100 From: Ingo Molnar Subject: Re: Crashes with KPTI and -rc6 Message-ID: <20180104065724.tzczjnf535pwf7ys@gmail.com> References: <5b0de7f2-0753-dbfc-e6d3-a5bac3a02a3d@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5b0de7f2-0753-dbfc-e6d3-a5bac3a02a3d@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Laura Abbott Cc: X86 ML , Linux Kernel Mailing List , Linux-MM , Thomas Gleixner * Laura Abbott wrote: > Hi, > > Fedora got a report via IRC of a double fault with KPTI > https://paste.fedoraproject.org/paste/SL~of04ZExXP6AN2gcJi7A I believe this one should be fixed by: d7732ba55c4b: x86/pti: Switch to kernel CR3 at early in entry_SYSCALL_compat() > This is on -rc6 . I saw the one fix posted already which > I'll pull in but I wanted to report this as a heads up > in case there are other issues. > > Full tree and configs are at > https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git/log/?h=rawhide Thanks! Linus's latest upstream: 00a5ae218d57: Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip and later kernels includes all fixes for all regressions that were reported so far on top of -rc6: 2fd9c41aea47: x86/process: Define cpu_tss_rw in same section as declaration d7732ba55c4b: x86/pti: Switch to kernel CR3 at early in entry_SYSCALL_compat() 3ffdeb1a02be: x86/dumpstack: Print registers for first stack frame a9cdbe72c4e8: x86/dumpstack: Fix partial register dumps 52994c256df3: x86/pti: Make sure the user/kernel PTEs match 694d99d40972: x86/cpu, x86/pti: Do not enable PTI on AMD processors 87faa0d9b43b: x86/pti: Enable PTI by default PTI fixes can also be independently tracked and pre-merged via: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/pti Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org