[PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Alyssa Ross]

This is true for Fedora, where this page was sourced from, but I don't
believe it has ever been true for the mainline kernel, because Linus
rejected it.

Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
Signed-off-by: Alyssa Ross <hi@alyssa.is>
---
 man/man7/kernel_lockdown.7 | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/man/man7/kernel_lockdown.7 b/man/man7/kernel_lockdown.7
index 5090484ea..5986c8f01 100644
--- a/man/man7/kernel_lockdown.7
+++ b/man/man7/kernel_lockdown.7
@@ -23,9 +23,6 @@ Lockdown: X: Y is restricted, see man kernel_lockdown.7
 .in
 .P
 where X indicates the process name and Y indicates what is restricted.
-.P
-On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled
-if the system boots in EFI Secure Boot mode.
 .\"
 .SS Coverage
 When lockdown is in effect, a number of features are disabled or have their
-- 
2.52.0

Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Alyssa Ross]

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On Tue, Feb 03, 2026 at 08:50:01PM +0100, Alyssa Ross wrote:
> This is true for Fedora, where this page was sourced from, but I don't
> believe it has ever been true for the mainline kernel, because Linus
> rejected it.
>
> Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> Signed-off-by: Alyssa Ross <hi@alyssa.is>

Just noticed there's a long-open bug for this as well, so additionally:

Closes: https://bugzilla.kernel.org/show_bug.cgi?id=213577

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Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Alejandro Colomar]

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Hi Alyssa,

On 2026-02-03T20:53:33+0100, Alyssa Ross wrote:
> On Tue, Feb 03, 2026 at 08:50:01PM +0100, Alyssa Ross wrote:
> > This is true for Fedora, where this page was sourced from, but I don't
> > believe it has ever been true for the mainline kernel, because Linus
> > rejected it.
> >
> > Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> > Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> > Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")

I've now CCed you in an email documenting the format we use for these.
It should be:

Fixes: bb509e6fcbae (2020-10-16; "kernel_lockdown.7: New page documenting the Kernel Lockdown feature")

I'll amend that myself.

> > Signed-off-by: Alyssa Ross <hi@alyssa.is>
> 
> Just noticed there's a long-open bug for this as well, so additionally:
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=213577

Thanks!  I'll keep the patch for a few days, in case anyone wants to
comment.


Have a lovely night!
Alex

-- 
<https://www.alejandro-colomar.es>

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Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Heinrich Schuchardt]

Am 3. Februar 2026 21:27:44 MEZ schrieb Alejandro Colomar <alx@kernel.org>:
>Hi Alyssa,
>
>On 2026-02-03T20:53:33+0100, Alyssa Ross wrote:
>> On Tue, Feb 03, 2026 at 08:50:01PM +0100, Alyssa Ross wrote:
>> > This is true for Fedora, where this page was sourced from, but I don't
>> > believe it has ever been true for the mainline kernel, because Linus
>> > rejected it.
>> >
>> > Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
>> > Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
>> > Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
>
>I've now CCed you in an email documenting the format we use for these.
>It should be:
>
>Fixes: bb509e6fcbae (2020-10-16; "kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
>
>I'll amend that myself.
>
>> > Signed-off-by: Alyssa Ross <hi@alyssa.is>
>> 
>> Just noticed there's a long-open bug for this as well, so additionally:
>> 
>> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=213577
>
>Thanks!  I'll keep the patch for a few days, in case anyone wants to
>comment.
>
>
>Have a lovely night!
>Alex
>

Can we move the information from the Notes section to replace the removed statement? What causes lockdown is central for users.

Best regards

Heinrich

Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Nicolas Bouchinet]

Hi,

On Tue, Feb 03, 2026 at 08:50:01PM +0100, Alyssa Ross wrote:
> This is true for Fedora, where this page was sourced from, but I don't
> believe it has ever been true for the mainline kernel, because Linus
> rejected it.
> 
I confirm this has never been merged upstream.
Idealy we really need to rewrite Lockdown documentation, it has changed
a lot since it was first introduced.

> Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> Signed-off-by: Alyssa Ross <hi@alyssa.is>
> ---
>  man/man7/kernel_lockdown.7 | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/man/man7/kernel_lockdown.7 b/man/man7/kernel_lockdown.7
> index 5090484ea..5986c8f01 100644
> --- a/man/man7/kernel_lockdown.7
> +++ b/man/man7/kernel_lockdown.7
> @@ -23,9 +23,6 @@ Lockdown: X: Y is restricted, see man kernel_lockdown.7
>  .in
>  .P
>  where X indicates the process name and Y indicates what is restricted.
> -.P
> -On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled
> -if the system boots in EFI Secure Boot mode.
>  .\"
>  .SS Coverage
>  When lockdown is in effect, a number of features are disabled or have their
> -- 
> 2.52.0

Best regards,

Nicolas

Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Xiu Jianfeng]

On 2/4/2026 3:50 AM, Alyssa Ross wrote:
> This is true for Fedora, where this page was sourced from, but I don't
> believe it has ever been true for the mainline kernel, because Linus
> rejected it.

Yeah, I also found this issue not long ago, but I haven't had time to 
submit a fix patch yet.

> 
> Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> Signed-off-by: Alyssa Ross <hi@alyssa.is>

I am not sure if appropriate to add my ACK here, if needed, feel free to 
add:

Acked-by: Xiu Jianfeng <xiujianfeng@huawei.com>

> ---
>   man/man7/kernel_lockdown.7 | 3 ---
>   1 file changed, 3 deletions(-)
> 
> diff --git a/man/man7/kernel_lockdown.7 b/man/man7/kernel_lockdown.7
> index 5090484ea..5986c8f01 100644
> --- a/man/man7/kernel_lockdown.7
> +++ b/man/man7/kernel_lockdown.7
> @@ -23,9 +23,6 @@ Lockdown: X: Y is restricted, see man kernel_lockdown.7
>   .in
>   .P
>   where X indicates the process name and Y indicates what is restricted.
> -.P
> -On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled
> -if the system boots in EFI Secure Boot mode.
>   .\"
>   .SS Coverage
>   When lockdown is in effect, a number of features are disabled or have their

Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Alejandro Colomar]

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Hi Xiu,

On 2026-02-05T19:48:02+0800, Xiu Jianfeng wrote:
> On 2/4/2026 3:50 AM, Alyssa Ross wrote:
> > This is true for Fedora, where this page was sourced from, but I don't
> > believe it has ever been true for the mainline kernel, because Linus
> > rejected it.
> 
> Yeah, I also found this issue not long ago, but I haven't had time to submit
> a fix patch yet.
> 
> > 
> > Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> > Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> > Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> > Signed-off-by: Alyssa Ross <hi@alyssa.is>
> 
> I am not sure if appropriate to add my ACK here, if needed, feel free to
> add:
> 
> Acked-by: Xiu Jianfeng <xiujianfeng@huawei.com>

It's appropriate.  Thanks!


Have a lovely day!
Alex

> 
> > ---
> >   man/man7/kernel_lockdown.7 | 3 ---
> >   1 file changed, 3 deletions(-)
> > 
> > diff --git a/man/man7/kernel_lockdown.7 b/man/man7/kernel_lockdown.7
> > index 5090484ea..5986c8f01 100644
> > --- a/man/man7/kernel_lockdown.7
> > +++ b/man/man7/kernel_lockdown.7
> > @@ -23,9 +23,6 @@ Lockdown: X: Y is restricted, see man kernel_lockdown.7
> >   .in
> >   .P
> >   where X indicates the process name and Y indicates what is restricted.
> > -.P
> > -On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled
> > -if the system boots in EFI Secure Boot mode.
> >   .\"
> >   .SS Coverage
> >   When lockdown is in effect, a number of features are disabled or have their
> 
> 

-- 
<https://www.alejandro-colomar.es>

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Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Nicolas Bouchinet]

On Thu, Feb 05, 2026 at 07:48:02PM +0800, Xiu Jianfeng wrote:
> On 2/4/2026 3:50 AM, Alyssa Ross wrote:
> > This is true for Fedora, where this page was sourced from, but I don't
> > believe it has ever been true for the mainline kernel, because Linus
> > rejected it.
> 
> Yeah, I also found this issue not long ago, but I haven't had time to submit
> a fix patch yet.
> 
> > 
> > Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> > Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> > Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> > Signed-off-by: Alyssa Ross <hi@alyssa.is>
> 
> I am not sure if appropriate to add my ACK here, if needed, feel free to
> add:
> 
> Acked-by: Xiu Jianfeng <xiujianfeng@huawei.com>
> 

You can also add mine too :

Acked-by: Nicolas Bouchinet <nicolas.bouchinet@oss.cyber.gouv.fr>

Thank you in advance,

Nicolas

> > ---
> >   man/man7/kernel_lockdown.7 | 3 ---
> >   1 file changed, 3 deletions(-)
> > 
> > diff --git a/man/man7/kernel_lockdown.7 b/man/man7/kernel_lockdown.7
> > index 5090484ea..5986c8f01 100644
> > --- a/man/man7/kernel_lockdown.7
> > +++ b/man/man7/kernel_lockdown.7
> > @@ -23,9 +23,6 @@ Lockdown: X: Y is restricted, see man kernel_lockdown.7
> >   .in
> >   .P
> >   where X indicates the process name and Y indicates what is restricted.
> > -.P
> > -On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled
> > -if the system boots in EFI Secure Boot mode.
> >   .\"
> >   .SS Coverage
> >   When lockdown is in effect, a number of features are disabled or have their
> 

Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Alejandro Colomar]

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Hi Heinrich,

On 2026-02-03T21:47:57+0100, Heinrich Schuchardt wrote:
> Am 3. Februar 2026 21:27:44 MEZ schrieb Alejandro Colomar <alx@kernel.org>:
> >Hi Alyssa,
> >
> >On 2026-02-03T20:53:33+0100, Alyssa Ross wrote:
> >> On Tue, Feb 03, 2026 at 08:50:01PM +0100, Alyssa Ross wrote:
> >> > This is true for Fedora, where this page was sourced from, but I don't
> >> > believe it has ever been true for the mainline kernel, because Linus
> >> > rejected it.
> >> >
> >> > Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> >> > Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> >> > Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> >
> >I've now CCed you in an email documenting the format we use for these.
> >It should be:
> >
> >Fixes: bb509e6fcbae (2020-10-16; "kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> >
> >I'll amend that myself.
> >
> >> > Signed-off-by: Alyssa Ross <hi@alyssa.is>
> >> 
> >> Just noticed there's a long-open bug for this as well, so additionally:
> >> 
> >> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=213577
> >
> >Thanks!  I'll keep the patch for a few days, in case anyone wants to
> >comment.
> >
> >
> >Have a lovely night!
> >Alex
> >
> 
> Can we move the information from the Notes section to replace the
> removed statement? What causes lockdown is central for users.

We can do that, yes.  Although, I prefer doing it in a separate patch.


Have a lovely night!
Alex

> 
> Best regards
> 
> Heinrich
> 

-- 
<https://www.alejandro-colomar.es>

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Re: [PATCH] man/man7/kernel_lockdown.7: remove Secure Boot untruth

[Alejandro Colomar]

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Hi all,

On 2026-02-06T17:08:35+0100, Nicolas Bouchinet wrote:
> On Thu, Feb 05, 2026 at 07:48:02PM +0800, Xiu Jianfeng wrote:
> > On 2/4/2026 3:50 AM, Alyssa Ross wrote:
> > > This is true for Fedora, where this page was sourced from, but I don't
> > > believe it has ever been true for the mainline kernel, because Linus
> > > rejected it.
> > 
> > Yeah, I also found this issue not long ago, but I haven't had time to submit
> > a fix patch yet.
> > 
> > > 
> > > Link: https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704
> > > Link: https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/
> > > Fixes: bb509e6fc ("kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
> > > Signed-off-by: Alyssa Ross <hi@alyssa.is>
> > 
> > I am not sure if appropriate to add my ACK here, if needed, feel free to
> > add:
> > 
> > Acked-by: Xiu Jianfeng <xiujianfeng@huawei.com>
> > 
> 
> You can also add mine too :
> 
> Acked-by: Nicolas Bouchinet <nicolas.bouchinet@oss.cyber.gouv.fr>

Thanks!  I've applied the patch.

    Link: <https://bbs.archlinux.org/viewtopic.php?pid=2088704#p2088704>
    Link: <https://lore.kernel.org/lkml/CA+55aFzYbpRAdma0PvqE+9ygySuKzNKByqOzzMufBoovXVnfPw@mail.gmail.com/>
    Fixes: bb509e6fcbae (2020-10-16; "kernel_lockdown.7: New page documenting the Kernel Lockdown feature")
    Signed-off-by: Alyssa Ross <hi@alyssa.is>
    Message-ID: <20260203195001.20131-1-hi@alyssa.is>
    Acked-by: Xiu Jianfeng <xiujianfeng@huawei.com>
    Message-ID: <aa62e24c-537e-4141-9507-37cd0af19dfc@huawei.com>
    Acked-by: Nicolas Bouchinet <nicolas.bouchinet@oss.cyber.gouv.fr>
    Message-ID: <aYYP23WUyydsMGyx@archlinux>
    Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
    Cc: David Howells <dhowells@redhat.com>
    Cc: <linux-security-module@vger.kernel.org>
    Signed-off-by: Alejandro Colomar <alx@kernel.org>


Have a lovely night!
Alex

> 
> Thank you in advance,
> 
> Nicolas
> 
> > > ---
> > >   man/man7/kernel_lockdown.7 | 3 ---
> > >   1 file changed, 3 deletions(-)
> > > 
> > > diff --git a/man/man7/kernel_lockdown.7 b/man/man7/kernel_lockdown.7
> > > index 5090484ea..5986c8f01 100644
> > > --- a/man/man7/kernel_lockdown.7
> > > +++ b/man/man7/kernel_lockdown.7
> > > @@ -23,9 +23,6 @@ Lockdown: X: Y is restricted, see man kernel_lockdown.7
> > >   .in
> > >   .P
> > >   where X indicates the process name and Y indicates what is restricted.
> > > -.P
> > > -On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled
> > > -if the system boots in EFI Secure Boot mode.
> > >   .\"
> > >   .SS Coverage
> > >   When lockdown is in effect, a number of features are disabled or have their
> > 

-- 
<https://www.alejandro-colomar.es>

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