From e88e72730d891f9f863c331d7c922b10ac3951c0 Mon Sep 17 00:00:00 2001 From: Suren Baghdasaryan Date: Wed, 5 Jul 2023 18:14:00 -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 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 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 Applied-from: https://lore.kernel.org/all/20230706011400.2949242-2-surenb@google.com/ --- mm/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/Kconfig b/mm/Kconfig index e3454087fd31ae..1d2afc2567d0e6 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1198,8 +1198,9 @@ 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.