patches/kernel/0174-x86-uv-Use-the-right-TLB-flush-API.patch

   1 From 37d56f22c5e02a6594bdae33e257d9ee420a83df Mon Sep 17 00:00:00 2001
   2 From: Peter Zijlstra <peterz@infradead.org>
   3 Date: Tue, 5 Dec 2017 13:34:50 +0100
   4 Subject: [PATCH 174/241] x86/uv: Use the right TLB-flush API
   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 Since uv_flush_tlb_others() implements flush_tlb_others() which is
  12 about flushing user mappings, we should use __flush_tlb_single(),
  13 which too is about flushing user mappings.
  14
  15 Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
  16 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  17 Acked-by: Andrew Banman <abanman@hpe.com>
  18 Cc: Andy Lutomirski <luto@kernel.org>
  19 Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
  20 Cc: Borislav Petkov <bp@alien8.de>
  21 Cc: Brian Gerst <brgerst@gmail.com>
  22 Cc: Dave Hansen <dave.hansen@linux.intel.com>
  23 Cc: David Laight <David.Laight@aculab.com>
  24 Cc: Denys Vlasenko <dvlasenk@redhat.com>
  25 Cc: Eduardo Valentin <eduval@amazon.com>
  26 Cc: Greg KH <gregkh@linuxfoundation.org>
  27 Cc: H. Peter Anvin <hpa@zytor.com>
  28 Cc: Josh Poimboeuf <jpoimboe@redhat.com>
  29 Cc: Juergen Gross <jgross@suse.com>
  30 Cc: Linus Torvalds <torvalds@linux-foundation.org>
  31 Cc: Mike Travis <mike.travis@hpe.com>
  32 Cc: Peter Zijlstra <peterz@infradead.org>
  33 Cc: Will Deacon <will.deacon@arm.com>
  34 Cc: aliguori@amazon.com
  35 Cc: daniel.gruss@iaik.tugraz.at
  36 Cc: hughd@google.com
  37 Cc: keescook@google.com
  38 Cc: linux-mm@kvack.org
  39 Signed-off-by: Ingo Molnar <mingo@kernel.org>
  40 (cherry picked from commit 3e46e0f5ee3643a1239be9046c7ba6c66ca2b329)
  41 Signed-off-by: Andy Whitcroft <apw@canonical.com>
  42 Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
  43 (cherry picked from commit 532216cdf02174dc08ca998b570c4699899fa355)
  44 Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
  45 ---
  46  arch/x86/platform/uv/tlb_uv.c | 2 +-
  47  1 file changed, 1 insertion(+), 1 deletion(-)
  48
  49 diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
  50 index f44c0bc95aa2..8538a6723171 100644
  51 --- a/arch/x86/platform/uv/tlb_uv.c
  52 +++ b/arch/x86/platform/uv/tlb_uv.c
  53 @@ -299,7 +299,7 @@ static void bau_process_message(struct msg_desc *mdp, struct bau_control *bcp,
  54                 local_flush_tlb();
  55                 stat->d_alltlb++;
  56         } else {
  57 -               __flush_tlb_one(msg->address);
  58 +               __flush_tlb_single(msg->address);
  59                 stat->d_onetlb++;
  60         }
  61         stat->d_requestee++;
  62 --
  63 2.14.2
  64