linux/arch
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 asm-generic: add correct MAX_POSSIBLE_PHYSMEM_BITS setting 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 arch-cleanup-2020-10-22 2020-10-23 10:06:38 -07:00
csky Yet two more places which invoke tracing from RCU disabled regions in the 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 Yet two more places which invoke tracing from RCU disabled regions in the 2020-11-29 11:19:26 -08:00
m68k arch-cleanup-2020-10-22 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 powerpc fixes for 5.10 #6 2020-12-10 16:36:30 -08:00
riscv RISC-V Fixes for 5.10 (unless there's an rc8) 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 Yet two more places which invoke tracing from RCU disabled regions in the 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