Dmitry Safonov 871402e05b mm: forbid splitting special mappings ...

Don't allow splitting of vm_special_mapping's.  It affects vdso/vvar
areas.  Uprobes have only one page in xol_area so they aren't affected.

Those restrictions were enforced by checks in .mremap() callbacks.
Restrict resizing with generic .split() callback.

Link: https://lkml.kernel.org/r/20201013013416.390574-7-dima@arista.com
Signed-off-by: Dmitry Safonov <dima@arista.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2020-12-15 12:13:41 -08:00

..

alpha

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

arc

Merge tag 'asm-generic-fixes-5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2020-11-27 15:00:35 -08:00

arm

mm: forbid splitting special mappings

2020-12-15 12:13:41 -08:00

arm64

mm: forbid splitting special mappings

2020-12-15 12:13:41 -08:00

c6x

Merge tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block

2020-10-23 10:06:38 -07:00

csky

Merge tag 'locking-urgent-2020-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-11-29 11:19:26 -08:00

h8300

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

hexagon

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

ia64

Merge tag 'locking-urgent-2020-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-11-29 11:19:26 -08:00

m68k

Merge tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block

2020-10-23 10:06:38 -07:00

microblaze

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

mips

mm: forbid splitting special mappings

2020-12-15 12:13:41 -08:00

nds32

mm: memcontrol: account pagetables per node

2020-12-15 12:13:40 -08:00

nios2

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

openrisc

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

parisc

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

powerpc

Merge tag 'powerpc-5.10-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2020-12-10 16:36:30 -08:00

riscv

Merge tag 'riscv-for-linus-5.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2020-12-12 09:50:26 -08:00

s390

mm: forbid splitting special mappings

2020-12-15 12:13:41 -08:00

sh

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24 16:47:35 +01:00

sparc

sparc: fix handling of page table constructor failure

2020-12-15 12:13:41 -08:00

um

Merge tag 'locking-urgent-2020-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-11-29 11:19:26 -08:00

x86

mm: forbid splitting special mappings

2020-12-15 12:13:41 -08:00

xtensa

xtensa: uaccess: Add missing __user to strncpy_from_user() prototype

2020-11-17 05:09:28 -08:00

.gitignore

…

Kconfig

mm: speedup mremap on 1GB or larger regions

2020-12-15 12:13:40 -08:00