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mm: disable CONFIG_PER_VMA_LOCK until its fixed 

A memory corruption was reported in [1] with bisection pointing to the
patch [2] enabling per-VMA locks for x86.  Disable per-VMA locks config to
prevent this issue until the fix is confirmed.  This is expected to be a
temporary measure.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=217624
[2] https://lore.kernel.org/all/20230227173632.3292573-30-surenb@google.com

Link: https://lkml.kernel.org/r/20230706011400.2949242-3-surenb@google.com
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/
Reported-by: Jacob Young <jacobly.alt@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624
Fixes: 0bff0aaea0 ("x86/mm: try VMA lock-based page fault handling first")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Holger Hoffstätte <holger@applied-asynchrony.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Suren Baghdasaryan 2023-07-05 18:14:00 -07:00 committed by Andrew Morton
parent 2b4f3b4987
commit f96c486703
1 changed files with 2 additions and 1 deletions
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3
mm/Kconfig
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@ -1224,8 +1224,9 @@ config ARCH_SUPPORTS_PER_VMA_LOCK
def_bool n
config PER_VMA_LOCK
def_bool y
bool "Enable per-vma locking during page fault handling."
depends on ARCH_SUPPORTS_PER_VMA_LOCK && MMU && SMP
depends on BROKEN
help
Allow per-vma locking during page fault handling.