This is a note to let you know that I've just added the patch titled
Documentation/admin: Remove the vsyscall=native documentation
to the 5.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
documentation-admin-remove-the-vsyscall-native-documentation.patch
and it can be found in the queue-5.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d974ffcfb7447db5f29a4b662a3eaf99a4e1109e Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto@xxxxxxxxxx>
Date: Wed, 26 Jun 2019 21:45:02 -0700
Subject: Documentation/admin: Remove the vsyscall=native documentation
From: Andy Lutomirski <luto@xxxxxxxxxx>
commit d974ffcfb7447db5f29a4b662a3eaf99a4e1109e upstream.
The vsyscall=native feature is gone -- remove the docs.
Fixes: 076ca272a14c ("x86/vsyscall/64: Drop "native" vsyscalls")
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Florian Weimer <fweimer@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Kernel Hardening <kernel-hardening@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/d77c7105eb4c57c1a95a95b6a5b8ba194a18e764.1561610354.git.luto@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Documentation/admin-guide/kernel-parameters.txt | 6 ------
1 file changed, 6 deletions(-)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5074,12 +5074,6 @@
emulate [default] Vsyscalls turn into traps and are
emulated reasonably safely.
- native Vsyscalls are native syscall instructions.
- This is a little bit faster than trapping
- and makes a few dynamic recompilers work
- better than they would in emulation mode.
- It also makes exploits much easier to write.
-
none Vsyscalls don't work at all. This makes
them quite hard to use for exploits but
might break your system.
Patches currently in stable-queue which might be from luto@xxxxxxxxxx are
queue-5.1/documentation-admin-remove-the-vsyscall-native-documentation.patch
