linux-kernel - Re: [PATCH] modpost: detect unterminated device id lists

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Message-Id: <20070912182144.89ee9411.akpm@linux-foundation.org>
Date:	Wed, 12 Sep 2007 18:21:44 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Kees Cook <kees@...ntu.com>
Cc:	Greg KH <greg@...ah.com>, Alexey Dobriyan <adobriyan@...il.com>,
	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org,
	Ben Collins <bcollins@...ntu.com>,
	Michael Wu <flamingice@...rmilk.net>
Subject: Re: [PATCH] modpost: detect unterminated device id lists

On Wed, 12 Sep 2007 17:49:37 -0700 Kees Cook <kees@...ntu.com> wrote:

> On Wed, Sep 12, 2007 at 02:53:56PM -0700, Greg KH wrote:
> > On Wed, Sep 12, 2007 at 03:48:49PM +0400, Alexey Dobriyan wrote:
> > > On 9/12/07, Jeff Garzik <jeff@...zik.org> wrote:
> > > > Kees Cook wrote:
> > > > > This patch against 2.6.23-rc6 fixes a couple drivers that do not
> > > > > correctly terminate their pci_device_id lists.  This results in garbage
> > > > > being spewed into modules.pcimap when the module happens to not have
> > > > > 28 NULL bytes following the table, and/or the last PCI ID is actually
> > > > > truncated from the table when calculating the modules.alias PCI aliases,
> > > > > cause those unfortunate device IDs to not auto-load.
> > > > >
> > > > > Signed-off-by: Kees Cook <kees@...ntu.com>
> > > >
> > > > ACK
> > > 
> > > I mut say, non-terminated PCI ids lists are constant PITA. There should be
> > > a way to a) put it in macro[1], so that terminator automatically added, and
> > > b) still allow #ifdef inside table like, e.g. 8139too does.
> > > 
> > > [1] or not macro, because #ifdef inside macros aren't allowed.
> > 
> > If you know of a way to do this in an easier manner, patches are always
> > gladly accepted :)
> 
> This patch against 2.6.23-rc6 will cause modpost to fail if any device
> id lists are incorrectly terminated, after reporting the offender.

ooh, clever chap.

> +			fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  The last of %lu is:\n", modname, device_id, id_size, size / id_size);

dude, bid on this: http://cgi.ebay.com/Wyse-WY55-General-Purpose-Serial-Terminal-No-Keyboard_W0QQitemZ230169388145QQihZ013QQcategoryZ51280QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

(not allowed to use 132-column mode, either)
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