From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>,
Benjamin LaHaise <bcrl@kvack.org>,
Hugh Dickins <hughd@google.com>, Jeff Moyer <jmoyer@redhat.com>,
Kirill Shutemov <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/3] special_mapping_fault() is broken
Date: Sun, 21 Jun 2015 23:07:25 +0200 [thread overview]
Message-ID: <20150621210725.GA18220@redhat.com> (raw)
On 06/20, Oleg Nesterov wrote:
>
> Let me first send the changes which look "obviously correct" to me.
> Perhaps I'll send more patches on top of this later.
But lets also fix another unmap/remap bug before the cleanups...
This series doesn't depend on the previous mremap fixes.
special_mapping_fault() is absolutely broken. It seems it was always
wrong, but this didn't matter until vdso/vvar started to use more than
one page.
I am not sure about 1/3. As the changelog says the name is not very
accurate, and I do not really like the vma->fault != NULL check. But
I hope this can work, and we can change this helper later if needed.
Please review.
Oleg.
include/linux/mm.h | 5 +++++
mm/memory.c | 13 ++++++-------
mm/mmap.c | 14 +++-----------
3 files changed, 14 insertions(+), 18 deletions(-)
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next reply other threads:[~2015-06-21 21:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-21 21:07 Oleg Nesterov [this message]
2015-06-21 21:07 ` [PATCH 1/3] mm: introduce vma_is_anonymous(vma) helper Oleg Nesterov
2015-06-21 21:07 ` [PATCH 2/3] mmap: fix the usage of ->vm_pgoff in special_mapping paths Oleg Nesterov
2015-06-21 21:07 ` [PATCH 3/3] mremap: fix the wrong !vma->vm_file check in copy_vma() Oleg Nesterov
2015-06-21 21:19 ` [PATCH 0/3] special_mapping_fault() is broken Oleg Nesterov
2015-06-23 0:47 ` vdso && f_op->mremap (Was: special_mapping_fault() is broken) Oleg Nesterov
2015-06-23 1:09 ` Linus Torvalds
2015-06-23 1:26 ` Andy Lutomirski
2015-06-23 15:04 ` Pavel Emelyanov
2015-06-23 17:03 ` Oleg Nesterov
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