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

From 23e04cdf533d255ec9b5bb58229b6785b17fd3f1 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <[email protected]>
Date: Tue, 5 Dec 2017 13:34:49 +0100
Subject: [PATCH 176/242] x86/mm: Use __flush_tlb_one() for kernel memory
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CVE-2017-5754

__flush_tlb_single() is for user mappings, __flush_tlb_one() for
kernel mappings.

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David Laight <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: Eduardo Valentin <[email protected]>
Cc: Greg KH <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>
(cherry picked from commit a501686b2923ce6f2ff2b1d0d50682c6411baf72)
Signed-off-by: Andy Whitcroft <[email protected]>
Signed-off-by: Kleber Sacilotto de Souza <[email protected]>
(cherry picked from commit 9d23f46143933cd29576b6aa2b1827f3f39b9cf8)
Signed-off-by: Fabian Grünbichler <[email protected]>
---
 arch/x86/mm/tlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index ed06f1593390..5b4342c5039c 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -546,7 +546,7 @@ static void do_kernel_range_flush(void *info)
 
 	/* flush range by one by one 'invlpg' */
 	for (addr = f->start; addr < f->end; addr += PAGE_SIZE)
-		__flush_tlb_single(addr);
+		__flush_tlb_one(addr);
 }
 
 void flush_tlb_kernel_range(unsigned long start, unsigned long end)
-- 
2.14.2