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[0/6] mremap: move_vma() fixes

Message ID 20201013013416.390574-1-dima@arista.com (mailing list archive)
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Series mremap: move_vma() fixes | expand

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Dmitry Safonov Oct. 13, 2020, 1:34 a.m. UTC 
1 - seems to be historical issue on a rarely taken path
2,3 - fixes related to the new mremap() flag
5 - dax device/hugetlbfs possible issue

4,6 - refactoring

As those seems to be actual issues, sending this during the merge-window.

(Changes to architecture code are in the 6 patch, but Cc'ing
maintainers on cover for the context, I hope it's fine).

Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.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: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
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>

Cc: linux-aio@kvack.org
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mm@kvack.org

Dmitry Safonov (6):
  mm/mremap: Account memory on do_munmap() failure
  mm/mremap: For MREMAP_DONTUNMAP check security_vm_enough_memory_mm()
  mremap: Don't allow MREMAP_DONTUNMAP on special_mappings and aio
  vm_ops: Rename .split() callback to .may_split()
  mremap: Check if it's possible to split original vma
  mm: Forbid splitting special mappings

 arch/arm/kernel/vdso.c                    |  9 ----
 arch/arm64/kernel/vdso.c                  | 41 ++-----------------
 arch/mips/vdso/genvdso.c                  |  4 --
 arch/s390/kernel/vdso.c                   | 11 +----
 arch/x86/entry/vdso/vma.c                 | 17 --------
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c |  2 +-
 drivers/dax/device.c                      |  4 +-
 fs/aio.c                                  |  5 ++-
 include/linux/mm.h                        |  5 ++-
 ipc/shm.c                                 |  8 ++--
 mm/hugetlb.c                              |  2 +-
 mm/mmap.c                                 | 22 ++++++++--
 mm/mremap.c                               | 50 +++++++++++------------
 13 files changed, 63 insertions(+), 117 deletions(-)


base-commit: bbf5c979011a099af5dc76498918ed7df445635b