Both patches are now upstream. Here's an updated debdiff.
diff -Nru manpages-5.10/debian/changelog manpages-5.10/debian/changelog --- manpages-5.10/debian/changelog 2020-12-22 06:25:08.000000000 -0700 +++ manpages-5.10/debian/changelog 2021-06-10 13:13:28.000000000 -0600 @@ -1,3 +1,10 @@ +manpages (5.10-2) UNRELEASED; urgency=medium + + * kernel_lockdown.7: Remove description of unsupported lockdown lift + mechanism via SysRq. (Closes: #989580) (LP: #1931171) + + -- dann frazier <da...@debian.org> Thu, 10 Jun 2021 13:13:28 -0600 + manpages (5.10-1) unstable; urgency=medium * New upstream version 5.10 diff -Nru manpages-5.10/debian/patches/0014-kernel_lockdown.7.patch manpages-5.10/debian/patches/0014-kernel_lockdown.7.patch --- manpages-5.10/debian/patches/0014-kernel_lockdown.7.patch 1969-12-31 17:00:00.000000000 -0700 +++ manpages-5.10/debian/patches/0014-kernel_lockdown.7.patch 2021-06-10 13:07:18.000000000 -0600 @@ -0,0 +1,47 @@ +From a9896777774d441617fe8fb9570dfb395867ff42 Mon Sep 17 00:00:00 2001 +From: dann frazier <dann.fraz...@canonical.com> +Date: Thu, 27 May 2021 09:13:42 +0200 +Subject: [PATCH 1/2] kernel_lockdown.7: Remove description of lifting via + SysRq (not upstream) + +The patch that implemented lockdown lifting via SysRq ended up +getting dropped[*] before the feature was merged upstream. Having +the feature documented but unsupported has caused some confusion +for our users. + +[*] http://archive.lwn.net:8080/linux-kernel/cacdnjuuxam06tcnczoa6nwxhnmqueqqm3ma8btukzpucs+d...@mail.gmail.com/ + +Signed-off-by: dann frazier <dann.fraz...@canonical.com> +Cc: Heinrich Schuchardt <xypron.g...@gmx.de> +Cc: David Howells <dhowe...@redhat.com> +Cc: Pedro Principeza <pedro.princip...@canonical.com> +Cc: Randy Dunlap <rdun...@infradead.org> +Cc: Kyle McMartin <k...@redhat.com> +Cc: Matthew Garrett <mj...@google.com> +Signed-off-by: Alejandro Colomar <alx.manpa...@gmail.com> +Signed-off-by: Michael Kerrisk <mtk.manpa...@gmail.com> + +Bug-Debian: https://bugs.debian.org/989580 +Bug-Ubuntu: https://bugs.launchpad.net/bugs/1931171 +Origin: https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/commit/?id=a9896777774d441617fe8fb9570dfb395867ff42 +Last-Update: 2021-06-10 + +diff --git a/man7/kernel_lockdown.7 b/man7/kernel_lockdown.7 +index 30863de62..b0442b3b6 100644 +--- a/man7/kernel_lockdown.7 ++++ b/man7/kernel_lockdown.7 +@@ -33,11 +33,6 @@ where X indicates the process name and Y indicates what is restricted. + .PP + On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled + if the system boots in EFI Secure Boot mode. +-.PP +-If the kernel is appropriately configured, lockdown may be lifted by typing +-the appropriate sequence on a directly attached physical keyboard. +-For x86 machines, this is +-.IR SysRq+x . + .\" + .SS Coverage + When lockdown is in effect, a number of features are disabled or have their +-- +2.32.0 + diff -Nru manpages-5.10/debian/patches/0015-kernel_lockdown.7.patch manpages-5.10/debian/patches/0015-kernel_lockdown.7.patch --- manpages-5.10/debian/patches/0015-kernel_lockdown.7.patch 1969-12-31 17:00:00.000000000 -0700 +++ manpages-5.10/debian/patches/0015-kernel_lockdown.7.patch 2021-06-10 13:09:09.000000000 -0600 @@ -0,0 +1,35 @@ +From 9d39058523043353681a8daa0c59531118ddf06f Mon Sep 17 00:00:00 2001 +From: dann frazier <dann.fraz...@canonical.com> +Date: Mon, 7 Jun 2021 16:19:43 -0600 +Subject: [PATCH 2/2] kernel_lockdown.7: Remove additional text alluding to + lifting via SysRq + +My previous patch intended to drop the docs for the lockdown lift +SysRq, but it missed this other section that refers to lifting it +via a keyboard - an allusion to that same SysRq. + +Signed-off-by: dann frazier <dann.fraz...@canonical.com> +Signed-off-by: Michael Kerrisk <mtk.manpa...@gmail.com> + +Bug-Debian: https://bugs.debian.org/989580 +Bug-Ubuntu: https://bugs.launchpad.net/bugs/1931171 +Origin: https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/commit/?id=9d39058523043353681a8daa0c59531118ddf06f +Last-Update: 2021-06-10 + +diff --git a/man7/kernel_lockdown.7 b/man7/kernel_lockdown.7 +index b0442b3b6..0c0a9500d 100644 +--- a/man7/kernel_lockdown.7 ++++ b/man7/kernel_lockdown.7 +@@ -19,9 +19,6 @@ modification of the kernel image and to prevent access to security and + cryptographic data located in kernel memory, whilst still permitting driver + modules to be loaded. + .PP +-Lockdown is typically enabled during boot and may be terminated, if configured, +-by typing a special key combination on a directly attached physical keyboard. +-.PP + If a prohibited or restricted feature is accessed or used, the kernel will emit + a message that looks like: + .PP +-- +2.32.0 + diff -Nru manpages-5.10/debian/patches/series manpages-5.10/debian/patches/series --- manpages-5.10/debian/patches/series 2020-12-22 06:18:53.000000000 -0700 +++ manpages-5.10/debian/patches/series 2021-06-10 13:05:50.000000000 -0600 @@ -10,3 +10,5 @@ 0010-tzfile.5.patch 0011-man.7.patch 0013-rtnetlink.7.patch +0014-kernel_lockdown.7.patch +0015-kernel_lockdown.7.patch
