From: Andy Lutomirski <[email protected]>
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 <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Kees Cook <[email protected]>
Cc: Florian Weimer <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: [email protected]
Cc: Borislav Petkov <[email protected]>
Cc: Kernel Hardening <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link:
https://lkml.kernel.org/r/d77c7105eb4c57c1a95a95b6a5b8ba194a18e764.1561610354.git.l...@kernel.org
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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
@@ -5102,12 +5102,6 @@
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.
