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x86/vsyscall: Fix documentation to reflect the default mode 

The default vsyscall mode has been updated from emulate to xonly for a
while. Update the kernel-parameters doc to reflect that.

Fixes: 625b7b7f79 ("x86/vsyscall: Change the default vsyscall mode to xonly")
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230111193211.1987047-1-sohil.mehta@intel.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Sohil Mehta 2023-01-11 19:32:11 +00:00 committed by Jonathan Corbet
parent cac02cbb91
commit 17f0669cff
1 changed files with 4 additions and 4 deletions
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8
Documentation/admin-guide/kernel-parameters.txt
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@ -6766,11 +6766,11 @@
functions are at fixed addresses, they make nice
targets for exploits that can control RIP.
emulate [default] Vsyscalls turn into traps and are
emulated reasonably safely. The vsyscall
page is readable.
emulate Vsyscalls turn into traps and are emulated
reasonably safely. The vsyscall page is
readable.
xonly Vsyscalls turn into traps and are
xonly [default] Vsyscalls turn into traps and are
emulated reasonably safely. The vsyscall
page is not readable.