From: Suren Baghdasaryan <surenb@xxxxxxxxxx> commit f96c48670319d685d18d50819ed0c1ef751ed2ac upstream. 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@xxxxxxxxxx Link: https://lkml.kernel.org/r/20230706011400.2949242-3-surenb@xxxxxxxxxx Reported-by: Jiri Slaby <jirislaby@xxxxxxxxxx> Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@xxxxxxxxxx/ Reported-by: Jacob Young <jacobly.alt@xxxxxxxxx> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624 Fixes: 0bff0aaea03e ("x86/mm: try VMA lock-based page fault handling first") Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Cc: Holger Hoffstätte <holger@xxxxxxxxxxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- mm/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- 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.
