diff options
Diffstat (limited to '0103-mm-disable_CONFIG_PER_VMA_LOCK.patch')
| -rw-r--r-- | 0103-mm-disable_CONFIG_PER_VMA_LOCK.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/0103-mm-disable_CONFIG_PER_VMA_LOCK.patch b/0103-mm-disable_CONFIG_PER_VMA_LOCK.patch new file mode 100644 index 000000000000..77ec856b6752 --- /dev/null +++ b/0103-mm-disable_CONFIG_PER_VMA_LOCK.patch @@ -0,0 +1,39 @@ +From e88e72730d891f9f863c331d7c922b10ac3951c0 Mon Sep 17 00:00:00 2001 +From: Suren Baghdasaryan <surenb@google.com> +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 <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> +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. |