linux-kernel - cpqphp: NULL ptr deref in cpqhpc

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Message-ID: <4C0774C6.4090000@suse.cz>
Date:	Thu, 03 Jun 2010 11:24:22 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	linux-pci@...r.kernel.org,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Jiri Slaby <jirislaby@...il.com>, achiang@...com
Subject: cpqphp: NULL ptr deref in cpqhpc_probe

Hi,

we have a system where there is a pci hotplug class device to be handled
by cpqphp, but it is not a bridge. But in cpqhpc_probe there is:
struct pci_bus *bus;
...
bus = pdev->subordinate;
...
bus->max_bus_speed = PCI_SPEED_66MHz_PCIX;

But as it is not a bridge, subordinate is NULL and the kernel crashes.

Any idea what would be a correct fix here?

The bugzilla entry is at:
https://bugzilla.novell.com/show_bug.cgi?id=609338

thanks,
-- 
js
suse labs
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