From mboxrd@z Thu Jan  1 00:00:00 1970
From: ahmedsoliman0x666@gmail.com (Ahmed Soliman)
Date: Fri, 6 Jul 2018 20:06:29 +0200
Subject: How to change page permission from inside the kernel?
Message-ID: <CAAGnT3aYPyssf48C63FMq-yPDcTDZzrTEMXGVbtic2jA1wamNg@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

I have a memory page allocated with mmap() from user space, This
address is passed to some kernel module (kvm_intel to be specific) and
i want to know how can I change the page permission from inside there
My goal is to achieve something like this
              mprotect(mem, PAGE_SIZE, PROT_READ)
except for mprotect can't be called from the kernel, and I couldn't
find the right way to do it.