diff options
Diffstat (limited to '0003-mm-disable-CONFIG_PER_VMA_LOCK-by-default-until-its-.patch')
| -rw-r--r-- | 0003-mm-disable-CONFIG_PER_VMA_LOCK-by-default-until-its-.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/0003-mm-disable-CONFIG_PER_VMA_LOCK-by-default-until-its-.patch b/0003-mm-disable-CONFIG_PER_VMA_LOCK-by-default-until-its-.patch new file mode 100644 index 000000000000..994bf3c4267f --- /dev/null +++ b/0003-mm-disable-CONFIG_PER_VMA_LOCK-by-default-until-its-.patch @@ -0,0 +1,38 @@ +From a6571d06002b30ca7f51af7681128179b122977c Mon Sep 17 00:00:00 2001 +From: Suren Baghdasaryan <surenb@google.com> +Date: Mon, 3 Jul 2023 11:21:50 -0700 +Subject: [PATCH 3/4] mm: disable CONFIG_PER_VMA_LOCK by default 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 <jirislaby@kernel.org> +Reported-by: Jacob Young <jacobly.alt@gmail.com> +Fixes: 0bff0aaea03e ("x86/mm: try VMA lock-based page fault handling first") +Signed-off-by: Suren Baghdasaryan <surenb@google.com> +--- + mm/Kconfig | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/mm/Kconfig b/mm/Kconfig +index e3454087fd31..d91a544678ee 100644 +--- a/mm/Kconfig ++++ b/mm/Kconfig +@@ -1198,7 +1198,7 @@ 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 + help + Allow per-vma locking during page fault handling. +-- +2.41.0 + |