Re: [PATCH] mremap move ZERO_PAGE fix

Hugh Dickins wrote:

Fix nasty little bug we've missed in Nick's mremap move ZERO_PAGE patch.
The "pte" at that point may be a swap entry or a pte_file entry: we must
check pte_present before perhaps corrupting such an entry.

Patch below against 2.6.14-rc2-mm1, but the same bug is in 2.6.14-rc2's
mm/mremap.c, and more dangerous there since it's affecting all arches:
I think the safest course is to send Nick's patch and Yoichi's build fix
and this fix (build tested) on to Linus - so only MIPS can be affected.


Thanks Hugh. I agree with your proposed merge plan.

--
SUSE Labs, Novell Inc.

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References:
- [PATCH] mremap move ZERO_PAGE fix
  - From: Hugh Dickins <[email protected]>

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