This is a note to let you know that I've just added the patch titled
PCI: Fix refcount issue in pci_create_root_bus() error recovery path
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-fix-refcount-issue-in-pci_create_root_bus-error-recovery-path.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 343df771e671d821478dd3ef525a0610b808dbf8 Mon Sep 17 00:00:00 2001
From: Jiang Liu <[email protected]>
Date: Fri, 7 Jun 2013 01:10:08 +0800
Subject: PCI: Fix refcount issue in pci_create_root_bus() error recovery path
From: Jiang Liu <[email protected]>
commit 343df771e671d821478dd3ef525a0610b808dbf8 upstream.
After calling device_register(&bridge->dev), the bridge is reference-
counted, and it is illegal to call kfree() on it except in the release
function.
[bhelgaas: changelog, use put_device() after device_register() failure]
Signed-off-by: Jiang Liu <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/pci/probe.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1694,12 +1694,16 @@ struct pci_bus *pci_create_root_bus(stru
bridge->dev.release = pci_release_bus_bridge_dev;
dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
error = pcibios_root_bridge_prepare(bridge);
- if (error)
- goto bridge_dev_reg_err;
+ if (error) {
+ kfree(bridge);
+ goto err_out;
+ }
error = device_register(&bridge->dev);
- if (error)
- goto bridge_dev_reg_err;
+ if (error) {
+ put_device(&bridge->dev);
+ goto err_out;
+ }
b->bridge = get_device(&bridge->dev);
device_enable_async_suspend(b->bridge);
pci_set_bus_of_node(b);
@@ -1753,8 +1757,6 @@ struct pci_bus *pci_create_root_bus(stru
class_dev_reg_err:
put_device(&bridge->dev);
device_unregister(&bridge->dev);
-bridge_dev_reg_err:
- kfree(bridge);
err_out:
kfree(b);
return NULL;
Patches currently in stable-queue which might be from [email protected] are
queue-3.9/pci-fix-refcount-issue-in-pci_create_root_bus-error-recovery-path.patch
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