[PATCH 0/3] special_mapping_fault() is broken

From: Oleg Nesterov
Date: Sun Jun 21 2015 - 17:09:20 EST

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.


include/linux/mm.h | 5 +++++
mm/memory.c | 13 ++++++-------
mm/mmap.c | 14 +++-----------
3 files changed, 14 insertions(+), 18 deletions(-)

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