On Sat, 2 Dec 2006, Jesper Juhl wrote:
> pci_get_slot() may return NULL if nothing was found.
> quirk_nvidia_ck804() does not check the value returned from pci_get_slot(),
> so it may end up causing a NULL pointer deref.
>
Looks good. The possible NULL pointer is actually not at pci_dev_put,
but rather at pci_find_capability on the msi_ht_cap_enabled(pdev) call.
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 5b44838..d3dcbda 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -1741,6 +1741,8 @@ static void __devinit quirk_nvidia_ck804
> * a single one having MSI is enough to be sure that MSI are supported.
> */
> pdev = pci_get_slot(dev->bus, 0);
> + if (!pdev)
> + return;
> if (dev->subordinate && !msi_ht_cap_enabled(dev)
> && !msi_ht_cap_enabled(pdev)) {
> printk(KERN_WARNING "PCI: MSI quirk detected. "
>
The check for dev->subordinate in the neighboring conditional can also be
removed.
David
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
