On Thu, Apr 22, 2010 at 04:38, Eric W. Biederman <[email protected]> wrote:
>>> > $ sudo ./startns bash
>>> > # ip l a type veth
>>> > # ip l s veth0 netns 1
>>> > # exit
> Then I should ask what is startns?
That's just a simple C program that calls unshare(CLONE_NEWNET) and
execs a shell.
> Either that is doing something different from my equivalent program, or I have
> patches to fix this, that just haven't been merged yet.
I have just downloaded and compiled 2.6.32-2 and 2.6.34-rc5 from
kernel.org using the .config from the debian package, and the oops is
reproducible in both.
This small C file reproduces the error every time:
$ cat netnsoops.c
#include <stdio.h>
#include <stdlib.h>
#define _GNU_SOURCE
#include <sched.h>
int main(int argc, char *argv[])
{
int c;
unsigned long flags = CLONE_NEWNET;
if(unshare(flags) == -1) {
perror("unshare");
return 1;
}
system("ip link add name FOO type veth peer name BAR");
system("ip link set FOO netns 1");
system("ip link show");
return 0;
}
--
Martín Ferrari
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