[CRIU] Re: [PATCH] Take into account stack guard page size in parse_smaps

[Pavel Emelyanov]

On 07/24/2012 10:56 AM, Cyrill Gorcunov wrote:
> On Tue, Jul 24, 2012 at 10:31:44AM +0400, Pavel Emelyanov wrote:
>>>>
>>>> This will affect the dump process as well -- we will dump one page more on the target task's stack.
>>>> Is that OK?
>>>
>>> Yeah, it's ok.
>>
>> Why? We'll try to read this page contents when dumping and may catch sigsegv.
> 
> No, as far as I remember this page never has present bit and our dumper simply
> find it as not loaded into memory and will not dump its contents.

This page is technically out of any mappings and reading pagemap for
those is not ... safe. Is it?

> 	Cyrill
>