On Wed, Oct 07, 2015 at 02:18:47PM +0100, Srinivas Kandagatla wrote:

On 07/10/15 13:55, Greg KH wrote:

quoted

On Wed, Oct 07, 2015 at 12:00:47PM +0100, Srinivas Kandagatla wrote:

quoted

As required by many providers like at24/at25/mxs-ocotp/qfprom and may be
other providers would want to allow root-only to read the nvmem content.
So making the defaults to be root-only access would address the request
and also provide flexibility to providers to specify there own permissions
on top of the root-only using the perm flag in nvmem_config.

Eeek, no, don't mess with different permissions, that's not ok, be
consistent and only allow root write access, that's why we have static
build-time checks to ensure you get this correct and do not accidentally
let a "normal" user access to things they shouldn't have access to.

Thanks for your inputs,

Code as it is in mainline would provide a write permission to root-only and
read to all the group.

Fixing/removing the group read permissions should stop normal user accessing
the binary file.

Great, send a simple patch that does this and I'll be glad to queue it
up.

thanks,

greg k-h