From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:45698 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751700AbeBHCmk (ORCPT ); Wed, 7 Feb 2018 21:42:40 -0500 Subject: Patch "x86/entry/64: Push extra regs right away" has been added to the 4.9-stable tree To: luto@kernel.org, bp@alien8.de, dwmw@amazon.co.uk, gregkh@linuxfoundation.org, kernel-hardening@lists.openwall.com, mingo@kernel.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Thu, 08 Feb 2018 03:38:19 +0100 Message-ID: <15180574993042@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled x86/entry/64: Push extra regs right away to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-entry-64-push-extra-regs-right-away.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Feb 8 03:30:27 CET 2018 From: Andy Lutomirski Date: Sun, 28 Jan 2018 10:38:49 -0800 Subject: x86/entry/64: Push extra regs right away From: Andy Lutomirski (cherry picked from commit d1f7732009e0549eedf8ea1db948dc37be77fd46) With the fast path removed there is no point in splitting the push of the normal and the extra register set. Just push the extra regs right away. [ tglx: Split out from 'x86/entry/64: Remove the SYSCALL64 fast path' ] Signed-off-by: Andy Lutomirski Signed-off-by: Thomas Gleixner Acked-by: Ingo Molnar Cc: Borislav Petkov Cc: Linus Torvalds Cc: Kernel Hardening Link: https://lkml.kernel.org/r/462dff8d4d64dfbfc851fbf3130641809d980ecd.1517164461.git.luto@kernel.org Signed-off-by: David Woodhouse Signed-off-by: Greg Kroah-Hartman --- arch/x86/entry/entry_64.S | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -177,10 +177,14 @@ GLOBAL(entry_SYSCALL_64_after_swapgs) pushq %r9 /* pt_regs->r9 */ pushq %r10 /* pt_regs->r10 */ pushq %r11 /* pt_regs->r11 */ - sub $(6*8), %rsp /* pt_regs->bp, bx, r12-15 not saved */ + pushq %rbx /* pt_regs->rbx */ + pushq %rbp /* pt_regs->rbp */ + pushq %r12 /* pt_regs->r12 */ + pushq %r13 /* pt_regs->r13 */ + pushq %r14 /* pt_regs->r14 */ + pushq %r15 /* pt_regs->r15 */ /* IRQs are off. */ - SAVE_EXTRA_REGS movq %rsp, %rdi call do_syscall_64 /* returns with IRQs disabled */ Patches currently in stable-queue which might be from luto@kernel.org are queue-4.9/x86-entry-64-push-extra-regs-right-away.patch queue-4.9/kvm-vmx-allow-direct-access-to-msr_ia32_spec_ctrl.patch queue-4.9/kvm-x86-add-ibpb-support.patch queue-4.9/kvm-svm-allow-direct-access-to-msr_ia32_spec_ctrl.patch queue-4.9/x86-paravirt-remove-noreplace-paravirt-cmdline-option.patch queue-4.9/x86-asm-move-status-from-thread_struct-to-thread_info.patch queue-4.9/kvm-x86-make-indirect-calls-in-emulator-speculation-safe.patch queue-4.9/x86-entry-64-remove-the-syscall64-fast-path.patch queue-4.9/x86-asm-fix-inline-asm-call-constraints-for-gcc-4.4.patch queue-4.9/kvm-vmx-make-indirect-call-speculation-safe.patch queue-4.9/x86-spectre-fix-spelling-mistake-vunerable-vulnerable.patch queue-4.9/x86-get_user-use-pointer-masking-to-limit-speculation.patch queue-4.9/x86-syscall-sanitize-syscall-table-de-references-under-speculation.patch queue-4.9/x86-pti-make-unpoison-of-pgd-for-trusted-boot-work-for-real.patch queue-4.9/x86-pti-mark-constant-arrays-as-__initconst.patch queue-4.9/kvm-vmx-emulate-msr_ia32_arch_capabilities.patch