On Wed, Jul 30, 2008 at 10:13:28PM +0530, Sukanto Ghosh wrote: > Hi, > > In PCI DMA operation, a device (consider it to be bus-master) can > directly transfer data to a memory location (some bus address, which > is 1:1 mapped to physical address, in case of x86). > Consider that a device driver asks the device to copy n bytes from its > buffer to the kernel buffer at bus address X. But due to some fault in > the device it starts writing to memory location Y, which is actually > the kernel-buffer of some other device driver. Isn't this a potential > security threat to the entire system ? How is it handled ? That's a fault of the hardware, nothing the os can do about that, sorry. Go complain to the vendor of the broken PCI device :) 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
