patches/kernel/0176-x86-mm-Use-__flush_tlb_one-for-kernel-memory.patch

   1 From 23e04cdf533d255ec9b5bb58229b6785b17fd3f1 Mon Sep 17 00:00:00 2001
   2 From: Peter Zijlstra <peterz@infradead.org>
   3 Date: Tue, 5 Dec 2017 13:34:49 +0100
   4 Subject: [PATCH 176/233] x86/mm: Use __flush_tlb_one() for kernel memory
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 CVE-2017-5754
  10
  11 __flush_tlb_single() is for user mappings, __flush_tlb_one() for
  12 kernel mappings.
  13
  14 Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
  15 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  16 Cc: Andy Lutomirski <luto@kernel.org>
  17 Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
  18 Cc: Borislav Petkov <bp@alien8.de>
  19 Cc: Brian Gerst <brgerst@gmail.com>
  20 Cc: Dave Hansen <dave.hansen@linux.intel.com>
  21 Cc: David Laight <David.Laight@aculab.com>
  22 Cc: Denys Vlasenko <dvlasenk@redhat.com>
  23 Cc: Eduardo Valentin <eduval@amazon.com>
  24 Cc: Greg KH <gregkh@linuxfoundation.org>
  25 Cc: H. Peter Anvin <hpa@zytor.com>
  26 Cc: Josh Poimboeuf <jpoimboe@redhat.com>
  27 Cc: Juergen Gross <jgross@suse.com>
  28 Cc: Linus Torvalds <torvalds@linux-foundation.org>
  29 Cc: Peter Zijlstra <peterz@infradead.org>
  30 Cc: Will Deacon <will.deacon@arm.com>
  31 Cc: aliguori@amazon.com
  32 Cc: daniel.gruss@iaik.tugraz.at
  33 Cc: hughd@google.com
  34 Cc: keescook@google.com
  35 Cc: linux-mm@kvack.org
  36 Signed-off-by: Ingo Molnar <mingo@kernel.org>
  37 (cherry picked from commit a501686b2923ce6f2ff2b1d0d50682c6411baf72)
  38 Signed-off-by: Andy Whitcroft <apw@canonical.com>
  39 Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
  40 (cherry picked from commit 9d23f46143933cd29576b6aa2b1827f3f39b9cf8)
  41 Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
  42 ---
  43  arch/x86/mm/tlb.c | 2 +-
  44  1 file changed, 1 insertion(+), 1 deletion(-)
  45
  46 diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
  47 index ed06f1593390..5b4342c5039c 100644
  48 --- a/arch/x86/mm/tlb.c
  49 +++ b/arch/x86/mm/tlb.c
  50 @@ -546,7 +546,7 @@ static void do_kernel_range_flush(void *info)
  51
  52         /* flush range by one by one 'invlpg' */
  53         for (addr = f->start; addr < f->end; addr += PAGE_SIZE)
  54 -               __flush_tlb_single(addr);
  55 +               __flush_tlb_one(addr);
  56  }
  57
  58  void flush_tlb_kernel_range(unsigned long start, unsigned long end)
  59 --
  60 2.14.2
  61