Hi Guilherme,
On Wed, Dec 28, 2016 at 3:58 PM, Guilherme G. Piccoli
<gpiccoli@xxxxxxxxxxxxxxxxxx> wrote:
> From: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxxxxxxx>
>
> Commit f209fa03fc9d ("serial: 8250_pci: Detach low-level driver during
> PCI error recovery") introduces a potential use-after-free in case the
> pciserial_init_ports call in serial8250_io_resume fails, which may
> happen if a memory allocation fails or if the .init quirk failed for
> whatever reason). If this happen, further pci_get_drvdata will return a
> pointer to freed memory.
>
> This patch reworks the PCI recovery resume hook to restore the old priv
> structure in this case, which should be ok, since the ports were already
> detached. Such error during recovery causes us to give up on the
> recovery.
>
> Fixes: f209fa03fc9d ("serial: 8250_pci: Detach low-level driver during
> PCI error recovery")
> Reported-by: Michal Suchanek <msuchanek@xxxxxxxx>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxxxxxxx>
Your Signed-off-by is missing here.
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