Peter Xu c2da319c2e mm/uffd: sanity check write bit for uffd-wp protected ptes ...

Let's add one sanity check for CONFIG_DEBUG_VM on the write bit in
whatever chance we have when walking through the pgtables.  It can bring
the error earlier even before the app notices the data was corrupted on
the snapshot.  Also it helps us to identify this is a wrong pgtable setup,
so hopefully a great information to have for debugging too.

Link: https://lkml.kernel.org/r/20221114000447.1681003-3-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2022-11-30 15:58:55 -08:00

..

alpha

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

arc

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

arm

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

arm64

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

csky

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

hexagon

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

ia64

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

loongarch

Merge branch 'mm-hotfixes-stable' into mm-stable

2022-11-30 14:58:42 -08:00

m68k

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

microblaze

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

mips

Merge branch 'mm-hotfixes-stable' into mm-stable

2022-11-30 14:58:42 -08:00

nios2

nios2: remove unused INIT_MMAP

2022-11-08 17:37:19 -08:00

openrisc

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

parisc

mm/hwpoison: pass pfn to num_poisoned_pages_*()

2022-11-08 17:37:22 -08:00

powerpc

mm: remove unused savedwrite infrastructure

2022-11-30 15:58:49 -08:00

riscv

Merge branch 'mm-hotfixes-stable' into mm-stable

2022-11-30 14:58:42 -08:00

s390

mm: delay page_remove_rmap() until after the TLB has been flushed

2022-11-30 15:58:50 -08:00

sh

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

sparc

Merge branch 'mm-hotfixes-stable' into mm-stable

2022-11-30 14:58:42 -08:00

um

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

x86

mm/uffd: sanity check write bit for uffd-wp protected ptes

2022-11-30 15:58:55 -08:00

xtensa

mm: remove kern_addr_valid() completely

2022-11-08 17:37:18 -08:00

.gitignore

…

Kconfig

Merge tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-10-10 17:53:04 -07:00