linux-kernel - [PATCH] drivers: of: pci: remove duplicate kfree in of_pci_get_host_bridge

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Message-Id: <1423630715-23568-1-git-send-email-lorenzo.pieralisi@arm.com>
Date:	Wed, 11 Feb 2015 04:58:35 +0000
From:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Cc:	jiang.liu@...ux.intel.com,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: [PATCH] drivers: of: pci: remove duplicate kfree in of_pci_get_host_bridge_resources

Commit d2be00c0fb5a ("of/pci: Free resources on failure in
of_pci_get_host_bridge_resources()") fixed the error code path in
of_pci_get_host_bridge_resources() by adding code that runs through the
resources list to free all resources in it and then calls kfree on the
bus_range resource pointer to complete the memory deallocation.
Since the bus_range resource is added to the resources list through
pci_add_resource, the resource_list_for_each_entry loop in the error
exit path frees it already and freeing it anew could trigger a double
free, hence this patch removes the superfluos kfree call on the bus_range
resource.

Fixes: d2be00c0fb5a ("of/pci: Free resources on failure in of_pci_get_host_bridge_resources()")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Reported-by: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Rafael J. Wysocki <rjw@...ysocki.net>
---
 drivers/of/of_pci.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 110fece..62426d8 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -229,7 +229,6 @@ parse_failed:
 	resource_list_for_each_entry(window, resources)
 		kfree(window->res);
 	pci_free_resource_list(resources);
-	kfree(bus_range);
 	return err;
 }
 EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);
-- 
2.2.1

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