On Wed, Jul 5, 2023 at 10:24 AM David Hildenbrand <david@xxxxxxxxxx> wrote: > > On 05.07.23 19:22, Suren Baghdasaryan wrote: > > On Wed, Jul 5, 2023 at 10:16 AM David Hildenbrand <david@xxxxxxxxxx> 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@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") > >>> Cc: stable@xxxxxxxxxxxxxxx > >>> Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> > >>> --- > >>> 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 && SMP > >>> + depends 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@xxxxxxxxxx/ by Holger Hoffstätte: https://lore.kernel.org/all/b198d649-f4bf-b971-31d0-e8433ec2a34c@xxxxxxxxxxxxxxxxxxxxxx/ only saying that Firefox started crashing after upgrading to 6.4.1 > > -- > Cheers, > > David / dhildenb >
