can: c_can_pci: c_can_pci_remove(): fix use-after-free

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There is a UAF in c_can_pci_remove(). dev is released by
free_c_can_dev() and is used by pci_iounmap(pdev, priv->base) later.
To fix this issue, save the mmio address before releasing dev.

Fixes: 5b92da0443 ("c_can_pci: generic module for C_CAN/D_CAN on PCI")
Link: https://lore.kernel.org/r/20210301024512.539039-1-ztong0001@gmail.com
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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Tong Zhang 2021-02-28 21:45:11 -05:00 • committed by Marc Kleine-Budde

parent 7507479c46

commit 0429d6d89f

1 changed files with 2 additions and 1 deletions

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drivers/net/can/c_can/c_can_pci.c

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