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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	[thread overview]
Message-ID: <20190717071439.14261-1-joro@8bytes.org> (raw)

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


             reply	other threads:[~2019-07-17  7:14 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-17  7:14 Joerg Roedel [this message]
2019-07-17  7:14 ` [PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one() Joerg Roedel
2019-07-17  7:14 ` [PATCH 2/3] x86/mm: Sync also unmappings " Joerg Roedel
2019-07-17 21:06   ` Dave Hansen
2019-07-18  8:44     ` Joerg Roedel
2019-07-17 21:43   ` Thomas Gleixner
2019-07-18  8:46     ` Joerg Roedel
2019-07-18  9:04       ` Thomas Gleixner
2019-07-18  9:25         ` Joerg Roedel
2019-07-19 14:01         ` Joerg Roedel
2019-07-19 21:10           ` Thomas Gleixner
2019-07-17  7:14 ` [PATCH 3/3] mm/vmalloc: Sync unmappings in vunmap_page_range() Joerg Roedel
2019-07-17 21:24   ` Andy Lutomirski
2019-07-18  9:17     ` Joerg Roedel
2019-07-18 19:04       ` Andy Lutomirski
2019-07-19 12:21         ` Joerg Roedel
2019-07-19 12:24           ` Andy Lutomirski
2019-07-19 13:00             ` Joerg Roedel

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