On Mon, 28 Aug 2006 08:52:02 -0700
"Miles Lane" <[email protected]> wrote:
> On 8/27/06, David Miller <[email protected]> wrote:
> > From: Andrew Morton <[email protected]>
> > Date: Sun, 27 Aug 2006 00:19:43 -0700
> >
> > > Jeremy reported that a while back too. I do not know what is causing it
> > > and as far as I know no net developers have yet looked into it.
> >
> > A debugging patch like this one should help figure out the culprit.
> >
> > If we don't see the gibberish netdevice name printed in the kernel
> > logs, then likely something is corrupting the netdevice structure or
> > the memory holding the name.
> >
> > diff --git a/net/core/dev.c b/net/core/dev.c
> > index d4a1ec3..45f9b19 100644
> > --- a/net/core/dev.c
> > +++ b/net/core/dev.c
> > @@ -738,6 +738,11 @@ int dev_change_name(struct net_device *d
> >
> > if (!dev_valid_name(newname))
> > return -EINVAL;
> > +#if 1
> > + printk("[%s:%d]: Changing netdevice name from [%s] to [%s]\n",
> > + current->comm, current->pid,
> > + dev->name, newname);
> > +#endif
> >
> > if (strchr(newname, '%')) {
> > err = dev_alloc_name(dev, newname);
> >
>
> Dan, do you have any idea why NetworkManager from Ubuntu 6.06.1
> would be corrupting network device names on recent MM kernels?
> I haven't seen this happening with Ubuntu's kernels. If you like, I can
> send you my kernel .config file.
>
> Here's what I get:
>
grepping for `ioctl' gives:
ioctl(9, SIOCGIWNAME, 0xbfe38d8c) = -1 EINVAL (Invalid argument)
ioctl(9, SIOCETHTOOL, 0xbfe38d2c) = 0
ioctl(11, SIOCGIFHWADDR, {ifr_name="eth0", ???}) = -1 ENODEV (No such device)
ioctl(11, SIOCGIFFLAGS, {ifr_name="eth0", ???}) = -1 ENODEV (No such device)
Perhaps you could generate the strace output for 2.6.18-rc5, grep that for
ioctl, look for differences? That initial SIOCGIWNAME failure is fishy.
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