On 26/11/15 20:32, Doug Goldstein wrote:
> When allocating a pciback device fails, avoid the possibility of a
> use after free.
We should not require clearing drvdata for correctness. We should
ensure we retain drvdata for as long as it is needed.
I note that pcistub_device_release() has:
kfree(dev_data);
pci_set_drvdata(dev, NULL);
/* Clean-up the device */
xen_pcibk_config_free_dyn_fields(dev);
xen_pcibk_config_free_dev(dev);
Which should (at a minimum) be reordered to move the kfree(dev_data) to
after the calls that require it
David
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