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PCI/PME: Fix possible use-after-free on remove 

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.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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>
hifive-unleashed-5.1
Sven Van Asbroeck 2019-03-01 11:54:19 -05:00 committed by Bjorn Helgaas
parent 95c80bc695
commit 7cf58b79b3
1 changed files with 1 additions and 0 deletions
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1
drivers/pci/pcie/pme.c
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@ -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);
}