Thank you for the response. I was referring to security issues due to an incorrect DMA from a bad/malicious device. I guess I will now be looking at whether devices come with their own controller and how abundant they are. Regards, Asim On 11/22/09, Greg KH <greg@xxxxxxxxx> wrote: > On Wed, Nov 18, 2009 at 04:07:56PM -0600, Asim wrote: >> Hi, >> >> I realize there is an issue with PCI devices due to the possibilities >> of a bad DMA due to a bad driver/device. > > What specific issue are you referring to? > >> Does this problem manifest to USB drivers as well or does the usb core >> ensure that the DMA addresses are always mapped correctly? Can anyone >> point me to the code file where this is being done. > > USB host controllers are PCI devices on most systems, so the issue > should be the same, right? On their own, USB drivers do not do DMA. > > thanks, > > greg k-h > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
