> It sounds like the only permission you care about is
> the permission of the _guest_ writing to that memory,
> not the permission of the qemu-kvm userspace program
> writing to that memory.
Yes that is perhaps what I meant.
>
> You may be looking at the wrong page mapping to
> manipulate.
I
> What happens after you've been up for 3 weeks and you're running out of
> usable pages?
That can't happen, it is my mistake missing some details, this is for
only protecting Kernel Pages,
Pages that are hold code or static data that is created once and
assumed to be there for ever, like kernel
-- Forwarded message --
From: Ahmed Soliman
Date: 6 July 2018 at 23:56
Subject: Re: How to change page permission from inside the kernel?
To: Valdis Kletnieks
>> Implementing some kernel protection against subset of rootkits that
>> manipulates kernel static data (
> So there's two questions here:
>
from inside KVM lkm (/virt/kvm and arch/x86/kvm )
> 1) Why does the page's protection need to be changed?
Implementing some kernel protection against subset of rootkits that
manipulates kernel static data (memory pages as well as their
mappings) by having them
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)
I want to port linux to new Ti tiva C TM4C123G
it is 80MHZ 32-bit ARM cortex M4 board with FPU
256KB flash /32bit SRAM /2kb EEPROM
I am interested on hacking into this board and turning it to micro server
(for fun and learning) or so... I compiled linux kernel few times in the
past, yet I am
while reading through linux/list.h I noticed that the linked list
structure is really simple with only pointer to the previous node and
pointer to next node with no other data (It can't handle anything
inside it ) I started to wonder how such linked list can be useful to
the kernel or (useful in
Hi;
when I used libc I never memorized where each function is located
beyond the basics (for example I never knew if strlen is in string.h
or ctype.h or strlib.h )
I just check out the functions man pages by man strlen
is their such functionality for the kernel where I dont need to
memorize the
I have sent a patch for cleaning about 40 error and 50 warning
generated checkpatch to the maintainer and all what I got in responce
is Nack. Please do not generate patches purely based on checkpatch.
so what did I do wrong ?! should I follow checkpatch or not ??
hi
first of all I want to thank you with your real help but
currently I started to get lost
I can build my own kernel write patches but cannot contribute to the
linux kernel
because I don't know where to start learning
I am really interested in the linux security module (although I know
nothing
thanks all of you
first I just want to point that nothing is available in /usr/src/ for
that specific kernel
and I found that the best way to remove a kernel built by me is to remove
/boot/vmlinuz*KERNEL-VERSION*
/boot/initrd.img*KERNEL-VERSION*
/boot/System-map*KERNEL-VERSION*
I have many kernels on my machine and I want to delete some of them
what can I do
some of these kernels are shipped with the OS ubuntu 14.04 and others I built by
make oldconfig
make all
make modules
sudo make modules_install
sudo make install
now how can I these kernels
currently I started reading through the linux kernel and I started
reading liunx/include/linux/list.h I understood some of the functions
but still I dont know what does these lines of code do
#ifndef _LINUX_LIST_H
#define _LINUX_LIST_H
which exist at the very beginning of the file
I also noticed
I have fresh kernel downloaded by git and I want to know how to build
Documentation/DocBook/ as pdf I have tried
make pdfdocs output
but I got those warnings
Warning(.//include/linux/init.h): no structured comments found
Warning(.//kernel/sys.c): no structured comments found
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