77 lines
3 KiB
Diff
77 lines
3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Mon, 4 Dec 2017 15:07:30 +0100
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Subject: [PATCH] x86/paravirt: Dont patch flush_tlb_single
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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CVE-2017-5754
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native_flush_tlb_single() will be changed with the upcoming
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PAGE_TABLE_ISOLATION feature. This requires to have more code in
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there than INVLPG.
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Remove the paravirt patching for it.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
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Reviewed-by: Juergen Gross <jgross@suse.com>
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Acked-by: Peter Zijlstra <peterz@infradead.org>
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Cc: Andy Lutomirski <luto@kernel.org>
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Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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Cc: Borislav Petkov <bp@alien8.de>
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Cc: Borislav Petkov <bpetkov@suse.de>
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Cc: Brian Gerst <brgerst@gmail.com>
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Cc: Dave Hansen <dave.hansen@intel.com>
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Cc: Dave Hansen <dave.hansen@linux.intel.com>
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Cc: David Laight <David.Laight@aculab.com>
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Cc: Denys Vlasenko <dvlasenk@redhat.com>
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Cc: Eduardo Valentin <eduval@amazon.com>
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Cc: Greg KH <gregkh@linuxfoundation.org>
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Cc: H. Peter Anvin <hpa@zytor.com>
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Cc: Linus Torvalds <torvalds@linux-foundation.org>
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Cc: Rik van Riel <riel@redhat.com>
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Cc: Will Deacon <will.deacon@arm.com>
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Cc: aliguori@amazon.com
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Cc: daniel.gruss@iaik.tugraz.at
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Cc: hughd@google.com
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Cc: keescook@google.com
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Cc: linux-mm@kvack.org
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Cc: michael.schwarz@iaik.tugraz.at
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Cc: moritz.lipp@iaik.tugraz.at
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Cc: richard.fellner@student.tugraz.at
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Link: https://lkml.kernel.org/r/20171204150606.828111617@linutronix.de
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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(cherry picked from commit a035795499ca1c2bd1928808d1a156eda1420383)
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Signed-off-by: Andy Whitcroft <apw@canonical.com>
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Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
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(cherry picked from commit 435d79a109b8c04d76a6cdb32b9b49a262f75e61)
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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arch/x86/kernel/paravirt_patch_64.c | 2 --
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1 file changed, 2 deletions(-)
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diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c
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index 11aaf1eaa0e4..c354833342bd 100644
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--- a/arch/x86/kernel/paravirt_patch_64.c
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+++ b/arch/x86/kernel/paravirt_patch_64.c
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@@ -9,7 +9,6 @@ DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax");
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DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax");
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DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax");
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DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3");
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-DEF_NATIVE(pv_mmu_ops, flush_tlb_single, "invlpg (%rdi)");
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DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd");
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DEF_NATIVE(pv_cpu_ops, usergs_sysret64, "swapgs; sysretq");
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@@ -59,7 +58,6 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
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PATCH_SITE(pv_mmu_ops, read_cr2);
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PATCH_SITE(pv_mmu_ops, read_cr3);
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PATCH_SITE(pv_mmu_ops, write_cr3);
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- PATCH_SITE(pv_mmu_ops, flush_tlb_single);
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PATCH_SITE(pv_cpu_ops, wbinvd);
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#if defined(CONFIG_PARAVIRT_SPINLOCKS)
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case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
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--
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2.14.2
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