linux-kernel - Re: show_uevent() and general protection fault

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Message-ID: <20120817025644.GA25843@localhost>
Date:	Fri, 17 Aug 2012 10:56:44 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Ming Lei <tom.leiming@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	devel@...verdev.osuosl.org, Kay Sievers <kay.sievers@...y.org>,
	Alan Stern <stern@...land.harvard.edu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: show_uevent() and general protection fault

On Fri, Aug 17, 2012 at 10:44:37AM +0800, Ming Lei wrote:
> On Fri, Aug 17, 2012 at 10:29 AM, Fengguang Wu <fengguang.wu@...el.com> wrote:
> 
> >
> > Something obviously wrong here:
> >
> >         env->buflen == 12
> >         env->envp_idx == 1627389952
> >         env->env[0] == NULL
> >
> > I'm not sure where it comes from, but if it's possible for random
> 
> Maybe you can print out the device name by dev_err in show_uevent
> under the situation.

Here it is:

[   68.721580] pci_link PNP0C0F:03: uevent 13 env[1627389952]: PNP0C0F:03/.../PNP0C0F:03

dev_err(dev, "uevent %d env[%d]: %s/.../%s\n", env->buflen, env->envp_idx, top_kobj->name, dev->kobj.name);

Thanks,
Fengguang
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