linux-kernel - Re: [patch 2/2] track and print last unloaded module in the oops trace

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Date:	Tue, 8 Jan 2008 06:26:56 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	DM <dm.n9107@...il.com>
Cc:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au, ak@...e.de,
	mingo@...e.hu
Subject: Re: [patch 2/2] track and print last unloaded module in the oops
 trace

On Tue, 8 Jan 2008 14:51:37 +0100
DM <dm.n9107@...il.com> wrote:

> On Jan 7, 2008 12:19 AM, Arjan van de Ven <arjan@...radead.org> wrote:
> [...]
> > This patch tracks the last unloaded module, and prints this as part
> > of the module list in the oops trace.
> >
> [...]
> >        }
> > +       /* Store the name of the last unloaded module for
> > diagnostic purposes */
> > +       sprintf(last_unloaded_module, mod->name);
> >        free_module(mod);
> >
> 
> Why use sprintf? If a module name contains the % character we could
> overflow the buffer. Or is module-unloading root-only and we don't
> care?

module loading isn't just root only; the name comes from an already loaded module.
If you can load kernel modules of your choice you own the entire kernel already anway
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