linux-kernel - Re: [2.6.23.1] PCI device locking up the computer when its module loads

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 8 Dec 2007 18:39:20 +0000 (GMT)
From:	Chris Rankin <rankincj@...oo.com>
To:	Dan Williams <dcbw@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Chris Rankin <rankincj@...oo.com>, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: [2.6.23.1] PCI device locking up the computer when its module loads

> > On Mon, 22 Oct 2007 13:43:16 +0100 (BST) Chris Rankin <rankincj@...oo.com> wrote:
> > > I have a Netgear MA301 PLX wireless networking adapter which wants to use the hostap_plx
> > > driver in Linux 2.6.23.1. This very same piece of hardware works fine in an old(!) P120
> > > machine running 2.4.33, but makes the 2.6.23.1 kernel freeze as soon as the
> > > pci_enable_device() function is called in prism2_plx_probe.

Interestingly, I have just discovered that I can do the following on this machine *without*
locking it up (on Linux 2.6.23.9):

# cat /sys/bus/pci/devices/0000:00:0e.0/enable
0
# echo 1 > /sys/bus/pci/devices/0000:00:0e.0/enable
# cat /sys/bus/pci/devices/0000:00:0e.0/enable
1

where according to lspci:

00:0e.0 Network controller: Netgear MA301 802.11b Wireless PCI Adapter (rev 02)

Doesn't writing to this sysfs file also call pci_enable_device()? Loading the hostap_plx module is
still instantly lethal.

Cheers,
Chris



      __________________________________________________________
Sent from Yahoo! Mail - a smarter inbox http://uk.mail.yahoo.com
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/