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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Oleg Nesterov <oleg@redhat.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv2 0/2] Fix crash due to vma_is_anonymous() false-positives
Date: Thu, 12 Jul 2018 17:56:24 +0300	[thread overview]
Message-ID: <20180712145626.41665-1-kirill.shutemov@linux.intel.com> (raw)


Fix crash found by syzkaller.

The fix allows to remove ->vm_ops checks.

v2:
 - Catch few more cases where we need to initialize ->vm_ops:
   + nommu;
   + ia64;
 - Make sure that we initialize ->vm_ops even if ->mmap failed.
   We need ->vm_ops in error path too.

Kirill A. Shutemov (2):
  mm: Fix vma_is_anonymous() false-positives
  mm: Drop unneeded ->vm_ops checks

 arch/ia64/kernel/perfmon.c |  1 +
 arch/ia64/mm/init.c        |  2 ++
 drivers/char/mem.c         |  1 +
 fs/binfmt_elf.c            |  2 +-
 fs/exec.c                  |  1 +
 fs/hugetlbfs/inode.c       |  1 +
 fs/kernfs/file.c           | 20 +-------------------
 fs/proc/task_mmu.c         |  2 +-
 include/linux/mm.h         |  5 ++++-
 kernel/events/core.c       |  2 +-
 kernel/fork.c              |  2 +-
 mm/gup.c                   |  2 +-
 mm/hugetlb.c               |  2 +-
 mm/khugepaged.c            |  4 ++--
 mm/memory.c                | 12 ++++++------
 mm/mempolicy.c             | 10 +++++-----
 mm/mmap.c                  | 25 ++++++++++++++++++-------
 mm/mremap.c                |  2 +-
 mm/nommu.c                 | 13 ++++++++++---
 mm/shmem.c                 |  1 +
 mm/util.c                  | 12 ++++++++++++
 21 files changed, 72 insertions(+), 50 deletions(-)

-- 
2.18.0


             reply	other threads:[~2018-07-12 14:56 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-12 14:56 Kirill A. Shutemov [this message]
2018-07-12 14:56 ` [PATCHv2 1/2] mm: Fix vma_is_anonymous() false-positives Kirill A. Shutemov
2018-07-12 16:20   ` Oleg Nesterov
2018-07-12 16:39     ` Kirill A. Shutemov
2018-07-12 14:56 ` [PATCHv2 2/2] mm: Drop unneeded ->vm_ops checks Kirill A. Shutemov
2018-07-16 13:30   ` REGRESSION: " Marcel Ziswiler
2018-07-16 14:20     ` Kirill A. Shutemov
2018-07-16 16:09       ` Marcel Ziswiler
2018-07-16 16:57         ` Kirill A. Shutemov
2018-07-12 15:08 ` [PATCHv2 0/2] Fix crash due to vma_is_anonymous() false-positives Kirill A. Shutemov

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