| From | Jiri Slaby <> | Subject | [PATCH 3.12 008/113] can: c_can_pci: fix null-pointer-deref in c_can_start() - set device pointer | Date | Mon, 6 Mar 2017 10:10:32 +0100 |
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From: Einar Jón <tolvupostur@gmail.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit c97c52be78b8463ac5407f1cf1f22f8f6cf93a37 upstream.
The priv->device pointer for c_can_pci is never set, but it is used without a NULL check in c_can_start(). Setting it in c_can_pci_probe() like c_can_plat_probe() prevents c_can_pci.ko from crashing, with and without CONFIG_PM.
This might also cause the pm_runtime_*() functions in c_can.c to actually be executed for c_can_pci devices - they are the only other place where priv->device is used, but they all contain a null check.
Signed-off-by: Einar Jón <tolvupostur@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/net/can/c_can/c_can_pci.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/can/c_can/c_can_pci.c b/drivers/net/can/c_can/c_can_pci.c index b374be7891a2..b905e5e840f7 100644 --- a/drivers/net/can/c_can/c_can_pci.c +++ b/drivers/net/can/c_can/c_can_pci.c @@ -109,6 +109,7 @@ static int c_can_pci_probe(struct pci_dev *pdev, dev->irq = pdev->irq; priv->base = addr; + priv->device = &pdev->dev; if (!c_can_pci_data->freq) { dev_err(&pdev->dev, "no clock frequency defined\n"); -- 2.12.0
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