* [PATCH] x86/vsyscall: Fix documentation to reflect the default mode
@ 2023-01-11 19:32 Sohil Mehta
2023-01-12 21:32 ` Kees Cook
2023-01-19 21:24 ` Jonathan Corbet
0 siblings, 2 replies; 4+ messages in thread
From: Sohil Mehta @ 2023-01-11 19:32 UTC (permalink / raw)
To: Jonathan Corbet, linux-doc
Cc: Sohil Mehta, Andy Lutomirski, Thomas Gleixner, Kees Cook,
Tony Luck, Ravi V Shankar, linux-kernel, x86
The default vsyscall mode has been updated from emulate to xonly for a
while. Update the kernel-parameters doc to reflect that.
Fixes: 625b7b7f79c6 ("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>
---
Do documentation fixes typically get backported to stable? I haven't included
a stable cc assuming they do not.
Documentation/admin-guide/kernel-parameters.txt | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6cfa6e3996cf..87f0b645922c 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6756,11 +6756,11 @@
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.
--
2.34.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] x86/vsyscall: Fix documentation to reflect the default mode
2023-01-11 19:32 [PATCH] x86/vsyscall: Fix documentation to reflect the default mode Sohil Mehta
@ 2023-01-12 21:32 ` Kees Cook
2023-01-19 21:24 ` Jonathan Corbet
1 sibling, 0 replies; 4+ messages in thread
From: Kees Cook @ 2023-01-12 21:32 UTC (permalink / raw)
To: Sohil Mehta
Cc: Jonathan Corbet, linux-doc, Andy Lutomirski, Thomas Gleixner,
Tony Luck, Ravi V Shankar, linux-kernel, x86
On Wed, Jan 11, 2023 at 07:32:11PM +0000, Sohil Mehta wrote:
> The default vsyscall mode has been updated from emulate to xonly for a
> while. Update the kernel-parameters doc to reflect that.
>
> Fixes: 625b7b7f79c6 ("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: Kees Cook <keescook@chromium.org>
--
Kees Cook
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] x86/vsyscall: Fix documentation to reflect the default mode
2023-01-11 19:32 [PATCH] x86/vsyscall: Fix documentation to reflect the default mode Sohil Mehta
2023-01-12 21:32 ` Kees Cook
@ 2023-01-19 21:24 ` Jonathan Corbet
2023-01-21 16:58 ` Andy Lutomirski
1 sibling, 1 reply; 4+ messages in thread
From: Jonathan Corbet @ 2023-01-19 21:24 UTC (permalink / raw)
To: Sohil Mehta, linux-doc
Cc: Sohil Mehta, Andy Lutomirski, Thomas Gleixner, Kees Cook,
Tony Luck, Ravi V Shankar, linux-kernel, x86
Sohil Mehta <sohil.mehta@intel.com> writes:
> The default vsyscall mode has been updated from emulate to xonly for a
> while. Update the kernel-parameters doc to reflect that.
>
> Fixes: 625b7b7f79c6 ("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>
> ---
> Do documentation fixes typically get backported to stable? I haven't included
> a stable cc assuming they do not.
>
> Documentation/admin-guide/kernel-parameters.txt | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
Applied, thanks.
jon
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] x86/vsyscall: Fix documentation to reflect the default mode
2023-01-19 21:24 ` Jonathan Corbet
@ 2023-01-21 16:58 ` Andy Lutomirski
0 siblings, 0 replies; 4+ messages in thread
From: Andy Lutomirski @ 2023-01-21 16:58 UTC (permalink / raw)
To: Jonathan Corbet, Sohil Mehta, linux-doc
Cc: Thomas Gleixner, Kees Cook, Tony Luck, Shankar, Ravi V,
Linux Kernel Mailing List, the arch/x86 maintainers
On Thu, Jan 19, 2023, at 1:24 PM, Jonathan Corbet wrote:
> Sohil Mehta <sohil.mehta@intel.com> writes:
>
>> The default vsyscall mode has been updated from emulate to xonly for a
>> while. Update the kernel-parameters doc to reflect that.
>>
>> Fixes: 625b7b7f79c6 ("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>
>> ---
>> Do documentation fixes typically get backported to stable? I haven't included
>> a stable cc assuming they do not.
>>
>> Documentation/admin-guide/kernel-parameters.txt | 8 ++++----
>> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> Applied, thanks.
Belated ack! Sohil, thanks for the fix.
>
> jon
^ permalink raw reply [flat|nested] 4+ messages in thread
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2023-01-11 19:32 [PATCH] x86/vsyscall: Fix documentation to reflect the default mode Sohil Mehta
2023-01-12 21:32 ` Kees Cook
2023-01-19 21:24 ` Jonathan Corbet
2023-01-21 16:58 ` Andy Lutomirski
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