Hi All,
I am working on an IoT solution and would like to understand security
impact of these two CONFIG_SPI_SPIDEV and CONFIG_I2C_CHARDEV interfaces
of Linux. If a driver is developed from userspace for /dev/spiX.Y or
/dev/i2c interfaces, are there any security concerns ?
Userspace driver is to control external SPI slave on board. I heard that
these interfaces allows access to any of these type of devices on board.
How to avoid accessing any of these type of unwanted device access
from userspace ? Can Selinux or any mechanism control access to other
these type of devices from user-space ?
Please share your comments/findings on these two interfaces related to
security. If community had posted any security related discussions with
these interfaces, please share details to improve understanding.
-Thanks, Prasad