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 ?
-- Regards, Sukanto Ghosh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [EMAIL PROTECTED] Please read the FAQ at http://kernelnewbies.org/FAQ
