On Wed, Jul 5, 2023 at 10:24 AM David Hildenbrand david@redhat.com wrote:
On 05.07.23 19:22, Suren Baghdasaryan wrote:
On Wed, Jul 5, 2023 at 10:16 AM David Hildenbrand david@redhat.com wrote:
On 05.07.23 19:12, Suren Baghdasaryan wrote:
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 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 --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 && SMPdepends on BROKEN help Allow per-vma locking during page fault handling.Do we have any testing results (that don't reveal other issues :) ) for patch #1? Not sure if we really want to mark it broken if patch #1 fixes the issue.
I tested the fix using the only reproducer provided in the reports plus kernel compilation and my fork stress test. All looked good and stable but I don't know if other reports had the same issue or something different.
Can you point me at the other reports, so I can quickly scan them?
by Jacob Young: https://bugzilla.kernel.org/show_bug.cgi?id=217624 by Jiri Slaby: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/ by Holger Hoffstätte: https://lore.kernel.org/all/b198d649-f4bf-b971-31d0-e8433ec2a34c@applied-asy... only saying that Firefox started crashing after upgrading to 6.4.1
-- Cheers,
David / dhildenb