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From:   Joerg Roedel <joro@8bytes.org>
To:     Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Joerg Roedel <joro@8bytes.org>
Subject: [PATCH 0/3 v2] Sync unmappings in vmalloc/ioremap areas
Date:   Wed, 17 Jul 2019 09:14:36 +0200
Message-Id: <20190717071439.14261-1-joro@8bytes.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi,

here is a small patch-set to sync unmappings in the
vmalloc/ioremap areas between page-tables in the system.

This is only needed x86-32 with !SHARED_KERNEL_PMD, which is
the case on a PAE kernel with PTI enabled.

On affected systems the missing sync causes old mappings to
persist in some page-tables, causing data corruption and
other undefined behavior.

Please review.

Thanks,

	Joerg

Changes since v1:
	- Added correct Fixes-tags to all patches

Joerg Roedel (3):
  x86/mm: Check for pfn instead of page in vmalloc_sync_one()
  x86/mm: Sync also unmappings in vmalloc_sync_one()
  mm/vmalloc: Sync unmappings in vunmap_page_range()

 arch/x86/mm/fault.c | 9 +++++----
 mm/vmalloc.c        | 2 ++
 2 files changed, 7 insertions(+), 4 deletions(-)

-- 
2.17.1