Re: Cannot allocate memory when calling unshare

[ebiederm@xmission.com (Eric W. Biederman)]

Andy Johnson <johnsonzjo@gmail.com> writes:

> Thanks.
> Copy ans paste of that line:
> unshare --pid -- /bin/sh -c /bin/bash
>
> still gave:
> ./unshare --pid -- /bin/sh -c /bin/bash
> bash: fork: Cannot allocate memory
>
> also tried to tweak a bit and it did not help
> I am using latest git linux-util on fedora 18 with
> 3.8.4-202.fc18.x86_64 kernel

How weird.  It works here.

My hunch would be that my /bin/sh is dash, and fedora likes to use bash.
It looks like your /bin/sh is exec'ing /bin/bash instead of forking and
execing it.  You can look in another window and confirm that you don't
have two processes doing the work only one.

When it works echo $$ returns 1.

Shrug.

Eric