From 0c91f574c8be699aace87a3a8b3d11fde59109c1 Mon Sep 17 00:00:00 2001 From: Suren Baghdasaryan Date: Wed, 5 Jul 2023 10:12:12 -0700 Subject: [PATCH] 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 while the problem is being investigated. 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 Reported-by: Jiri Slaby Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/ Reported-by: Jacob Young Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624 Fixes: 0bff0aaea03e ("x86/mm: try VMA lock-based page fault handling first") Cc: stable@vger.kernel.org Signed-off-by: Suren Baghdasaryan --- mm/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/Kconfig b/mm/Kconfig index 09130434e30d3..0abc6c71dd893 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -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.