[Xen-devel] Re: [PATCH 1/1] PCI: xen-pcifront, fix PCI reference leak

[Milton Miller <miltonm@xxxxxxx>]

On 2010-11-04 at about 14:31:30 Jiri Slaby wrote:
> Stanse found that when pdev is found and has no driver a reference is
> leaked in pcifront_common_process. So add pci_dev_put there. For the
> pdev == NULL case, pci_dev_put(NULL) is fine.

While that may be true, the dev_err(&pcidev->dev ... is a NULL pointer
deref.

> 
> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> ---
>  drivers/pci/xen-pcifront.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
> index a87c498..f9ffc05 100644
> --- a/drivers/pci/xen-pcifront.c
> +++ b/drivers/pci/xen-pcifront.c
> @@ -578,6 +578,7 @@  static pci_ers_result_t pcifront_common_process(int cmd,
>       if (!pcidev || !pcidev->driver) {
>               dev_err(&pcidev->dev,
>                       "device or driver is NULL\n");
> +             pci_dev_put(pcidev);
>               return result;
>       }
>       pdrv = pcidev->driver;
> 

milton

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