linux-kernel - [PATCH AUTOSEL 4.19 31/97] x86/dump_pagetables: Fix LDT remap address marker

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Message-Id: <20181226223557.149329-31-sashal@kernel.org>
Date:   Wed, 26 Dec 2018 17:34:51 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>, bp@...en8.de,
        hpa@...or.com, dave.hansen@...ux.intel.com, luto@...nel.org,
        peterz@...radead.org, boris.ostrovsky@...cle.com, jgross@...e.com,
        bhe@...hat.com, hans.van.kranenburg@...dix.com, linux-mm@...ck.org,
        xen-devel@...ts.xenproject.org, Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.19 31/97] x86/dump_pagetables: Fix LDT remap address marker

From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>

[ Upstream commit 254eb5505ca0ca749d3a491fc6668b6c16647a99 ]

The LDT remap placement has been changed. It's now placed before the direct
mapping in the kernel virtual address space for both paging modes.

Change address markers order accordingly.

Fixes: d52888aa2753 ("x86/mm: Move LDT remap out of KASLR region on 5-level paging")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: bp@...en8.de
Cc: hpa@...or.com
Cc: dave.hansen@...ux.intel.com
Cc: luto@...nel.org
Cc: peterz@...radead.org
Cc: boris.ostrovsky@...cle.com
Cc: jgross@...e.com
Cc: bhe@...hat.com
Cc: hans.van.kranenburg@...dix.com
Cc: linux-mm@...ck.org
Cc: xen-devel@...ts.xenproject.org
Link: https://lkml.kernel.org/r/20181130202328.65359-3-kirill.shutemov@linux.intel.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/mm/dump_pagetables.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 073755c89126..c05a818224bb 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -53,10 +53,10 @@ struct addr_marker {
 enum address_markers_idx {
 	USER_SPACE_NR = 0,
 	KERNEL_SPACE_NR,
-	LOW_KERNEL_NR,
-#if defined(CONFIG_MODIFY_LDT_SYSCALL) && defined(CONFIG_X86_5LEVEL)
+#ifdef CONFIG_MODIFY_LDT_SYSCALL
 	LDT_NR,
 #endif
+	LOW_KERNEL_NR,
 	VMALLOC_START_NR,
 	VMEMMAP_START_NR,
 #ifdef CONFIG_KASAN
@@ -64,9 +64,6 @@ enum address_markers_idx {
 	KASAN_SHADOW_END_NR,
 #endif
 	CPU_ENTRY_AREA_NR,
-#if defined(CONFIG_MODIFY_LDT_SYSCALL) && !defined(CONFIG_X86_5LEVEL)
-	LDT_NR,
-#endif
 #ifdef CONFIG_X86_ESPFIX64
 	ESPFIX_START_NR,
 #endif
-- 
2.19.1