Re: [PATCH 2/4] pidns: Call pid_ns_prepare_proc from create_pid_namespace

[Oleg Nesterov <oleg@redhat.com>]

On 01/31, Daniel Lezcano wrote:
>
> On 01/31/2011 02:22 PM, Oleg Nesterov wrote:
>> On 01/31, Daniel Lezcano wrote:
>>> @@ -96,6 +97,9 @@ static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_p
>>>   	for (i = 1; i<  PIDMAP_ENTRIES; i++)
>>>   		atomic_set(&ns->pidmap[i].nr_free, BITS_PER_PAGE);
>>>
>>> +	if (pid_ns_prepare_proc(ns))
>>> +		goto out_free_map;
>>> +
>>>   	return ns;
>> This is not right, afaics. I already sent the similar patches, but
>> they were ignored ;)
>>
>> Please see http://marc.info/?l=linux-kernel&m=127697484000334
>>
>> If pid_ns_prepare_proc() fails we shouldn't blindly return ENOMEM
>> and, more importantly, we need put_pid_ns(parent_ns).
>
> Oh, ok. Right. Thanks for the pointer.
>
> Are you ok if I replace the patch 2/4 with your patch ?

My patch depends on 1/4, http://marc.info/?l=linux-kernel&m=127697468632667

Your change looks very similar to 1/4 + 3/4. Just fix the problem
in create_pid_namespace(), no need to replace.

Oleg.