On Wed, Jan 17, 2018 at 7:06 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> Similar to the way put_cmsg() handles 32bit case on biarch
> targets, introduce a flag telling put_cmsg() to treat
> ->msg_control as kernel pointer, using memcpy instead of
> copy_to_user(). That allows to avoid the use of kernel_recvmsg()
> with its set_fs().
If this is the only case that kernel_recvmsg() exists for, then by all
means, that patch certainly looks like a good thing.
Linus
