From: Jiang Liu <liuj97@gmail.com>
To: Yinghai Lu <yinghai@kernel.org>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: Jiang Liu <jiang.liu@huawei.com>, Ashok Raj <ashok.raj@intel.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Youquan Song <youquan.song@intel.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
chenkeping@huawei.com
Subject: [PATCH 3/5] Fix an access-after-free issue in function pci_stop_and_remove_bus()
Date: Mon, 12 Mar 2012 01:48:27 +0800 [thread overview]
Message-ID: <1331488109-13466-4-git-send-email-jiang.liu@huawei.com> (raw)
In-Reply-To: <1331488109-13466-1-git-send-email-jiang.liu@huawei.com>
If pci_stop_and_remove_bus() is called to remove a pci root bus,
the host_bridge structure may have already been freed after returning
from pci_remove_bus(), so don't access the structure any more.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
---
drivers/pci/remove.c | 3 ---
1 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 75b0092..25f368e 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -194,9 +194,6 @@ void pci_stop_and_remove_bus(struct pci_bus *bus)
pci_remove_bus(bus);
- if (host_bridge)
- host_bridge->bus = NULL;
-
if (pci_bridge)
pci_bridge->subordinate = NULL;
}
--
1.7.5.4
next prev parent reply other threads:[~2012-03-11 17:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-11 17:48 [RFC PATCH 0/5] PCI: introduce hotplug safe bus searching interfaces Jiang Liu
2012-03-11 17:48 ` [PATCH 1/5] Fix device reference count leakage in pci_dev_present() Jiang Liu
2012-03-11 17:48 ` [PATCH 2/5] Correctly clean up pci root buses in function pci_remove_bus() Jiang Liu
2012-03-13 6:24 ` Yinghai Lu
2012-03-13 7:23 ` Jiang Liu
2012-03-11 17:48 ` Jiang Liu [this message]
2012-03-13 3:47 ` [PATCH 3/5] Fix an access-after-free issue in function pci_stop_and_remove_bus() Bjorn Helgaas
2012-03-11 17:48 ` [RFC PATCH 4/5] PCI: Introduce hotplug-safe pci bus searching interfaces Jiang Liu
2012-03-13 3:49 ` Bjorn Helgaas
2012-03-13 8:13 ` Jiang Liu
2012-03-11 17:48 ` [RFC PATCH 5/5] PCI: Replace old pci bus searching function calls with hotplug safe ones Jiang Liu
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