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Subject[PATCH v2] PCIE/PME: fix possible use-after-free on remove
Date
In remove(), ensure that the pme work cannot run after kfree()
is called. Otherwise, this could result in a use-after-free.

This issue was detected with the help of Coccinelle.

Cc: Sinan Kaya <okaya@kernel.org>
Cc: Frederick Lawler <fred@fredlawl.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
---
drivers/pci/pcie/pme.c | 1 +
1 file changed, 1 insertion(+)

v2:
rebased against Bjorn Helgaas's pcm/pm branch at
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git

diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index efa5b552914b..54d593d10396 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -437,6 +437,7 @@ static void pcie_pme_remove(struct pcie_device *srv)

pcie_pme_disable_interrupt(srv->port, data);
free_irq(srv->irq, srv);
+ cancel_work_sync(&data->work);
kfree(data);
}

--
2.17.1
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