Pasha Tatashin df4e817b71 mm: page table check ... Check user page table entries at the time they are added and removed. Allows to synchronously catch memory corruption issues related to double mapping. When a pte for an anonymous page is added into page table, we verify that this pte does not already point to a file backed page, and vice versa if this is a file backed page that is being added we verify that this page does not have an anonymous mapping We also enforce that read-only sharing for anonymous pages is allowed (i.e. cow after fork). All other sharing must be for file pages. Page table check allows to protect and debug cases where "struct page" metadata became corrupted for some reason. For example, when refcnt or mapcount become invalid. Link: https://lkml.kernel.org/r/20211221154650.1047963-4-pasha.tatashin@soleen.com Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Greg Thelen <gthelen@google.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Paul Turner <pjt@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sami Tolvanen <samitolvanen@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Xu <weixugc@google.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2022-01-15 16:30:28 +02:00
..
acpi
asm-generic	Add linux/cacheflush.h	2021-11-17 10:36:15 -05:00
clocksource
crypto
drm
dt-bindings
keys
kunit
kvm
linux	mm: page table check	2022-01-15 16:30:28 +02:00
math-emu
media
memory
misc
net	udp6: Use Segment Routing Header for dest address if present	2022-01-04 12:17:35 +00:00
pcmcia
ras
rdma	RDMA/netlink: Add __maybe_unused to static inline in C file	2021-11-16 13:13:08 -04:00
scsi
soc	net: mscc: ocelot: create a function that replaces an existing VCAP filter	2021-11-26 11:38:20 -08:00
sound	ASoC: Fixes for v5.16	2021-11-25 14:35:24 +01:00
target
trace	mm: vmscan: Reduce throttling due to a failure to make progress	2021-12-31 11:17:07 -08:00
uapi	mm: add a field to store names for private anonymous memory	2022-01-15 16:30:27 +02:00
vdso
video
xen	xen/console: harden hvc_xen against event channel storms	2021-12-16 08:24:08 +01:00