linux-kernel - [Resend][PATCH] PCI / Hotplug: Fix unexpected driver unregister in pciehp

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-next>] [day] [month] [year] [list]

Message-Id: <201012181329.46071.rjw@sisk.pl>
Date:	Sat, 18 Dec 2010 13:29:45 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: [Resend][PATCH] PCI / Hotplug: Fix unexpected driver unregister in pciehp_acpi.c

From: Rafael J. Wysocki <rjw@...k.pl>

If pcie_ports_disabled is set, pcie_port_service_register() returns
error code and select_detection_mode() should not attempt to
unregister dummy_driver and use dummy_slots.  It should return
PCIEHP_DETECT_ACPI immediately instead.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---

Hi Jesse,

I'm not sure if you've got this patch.  It fixes a problem introduced in the
2.6.37 merge window, so I guess it should be merged before 2.6.37 final.

Details in https://bugzilla.kernel.org/show_bug.cgi?id=20232#c23 .

Thanks,
Rafael

---
 drivers/pci/hotplug/pciehp_acpi.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/pci/hotplug/pciehp_acpi.c
===================================================================
--- linux-2.6.orig/drivers/pci/hotplug/pciehp_acpi.c
+++ linux-2.6/drivers/pci/hotplug/pciehp_acpi.c
@@ -115,7 +115,8 @@ static struct pcie_port_service_driver _
 static int __init select_detection_mode(void)
 {
 	struct dummy_slot *slot, *tmp;
-	pcie_port_service_register(&dummy_driver);
+	if (pcie_port_service_register(&dummy_driver))
+		return PCIEHP_DETECT_ACPI;
 	pcie_port_service_unregister(&dummy_driver);
 	list_for_each_entry_safe(slot, tmp, &dummy_slots, list) {
 		list_del(&slot->list);
--
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/