diff options
| author | Feilong Lin <linfeilong@huawei.com> | 2021-03-25 15:26:00 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-22 10:59:48 +0200 |
| commit | d82da045a5da9f889a6cee316cabeb2be29cb199 (patch) | |
| tree | f709755dbdedd22d6d39dc4a7641a7f1b095457f | |
| parent | 01aef04e4861a99a956418bf1d8cfef94ce18243 (diff) | |
ACPI / hotplug / PCI: Fix reference count leak in enable_slot()
[ Upstream commit 3bbfd319034ddce59e023837a4aa11439460509b ]
In enable_slot(), if pci_get_slot() returns NULL, we clear the SLOT_ENABLED
flag. When pci_get_slot() finds a device, it increments the device's
reference count. In this case, we did not call pci_dev_put() to decrement
the reference count, so the memory of the device (struct pci_dev type) will
eventually leak.
Call pci_dev_put() to decrement its reference count when pci_get_slot()
returns a PCI device.
Link: https://lore.kernel.org/r/b411af88-5049-a1c6-83ac-d104a1f429be@huawei.com
Signed-off-by: Feilong Lin <linfeilong@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index be35bbfa6968..3d8844e7090a 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -540,6 +540,7 @@ static void enable_slot(struct acpiphp_slot *slot, bool bridge) slot->flags &= ~SLOT_ENABLED; continue; } + pci_dev_put(dev); } } |