On 01/18/2012 05:04 PM, Ben Hutchings wrote:
> There is harm. You'll be blacklisting also the standard block device
> ioctls, and those won't work on 32-on-64 anymore. A system with 32-bit
> userland will likely not boot anymore.
It does (yes, I tested that myself now). The standard block device
ioctls are handled without calling the driver's compat_ioctl.
What about the non-compat path when done by non-root?
* Does BLKROSET still return EACCES when run by non-root and without
CAP_SYS_ADMIN? I suspect your patch is changing it to EINVAL.
* Does BLKFLSBUF work when run by non-root but with CAP_SYS_ADMIN?
Paolo
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