diff mbox series

[v4,2/2] mm: disable CONFIG_PER_VMA_LOCK until its fixed

Message ID 20230706011400.2949242-3-surenb@google.com (mailing list archive)
State New
Headers show
Series Avoid memory corruption caused by per-VMA locks | expand

Commit Message

Suren Baghdasaryan July 6, 2023, 1:14 a.m. UTC 
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 <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: 0bff0aaea03e ("x86/mm: try VMA lock-based page fault handling first")
Cc: stable@vger.kernel.org
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
---
 mm/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/mm/Kconfig b/mm/Kconfig
index 09130434e30d..0abc6c71dd89 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.