V6.12, ADD Extensible Scheduling Class
This commit is contained in:
2
PKGBUILD
2
PKGBUILD
@@ -2,7 +2,7 @@
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# copied from Jan Alexander Steffens (heftig) <heftig@archlinux.org>
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# copied from Jan Alexander Steffens (heftig) <heftig@archlinux.org>
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pkgbase=linux-tom
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pkgbase=linux-tom
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pkgver=6.12.8.arch1
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pkgver=6.12.9.arch1
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pkgrel=1
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pkgrel=1
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pkgdesc='Linux'
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pkgdesc='Linux'
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url='https://github.com/archlinux/linux'
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url='https://github.com/archlinux/linux'
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6
config
6
config
@@ -1,15 +1,15 @@
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#
|
#
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# Automatically generated file; DO NOT EDIT.
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# Automatically generated file; DO NOT EDIT.
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# Linux/x86 6.12.8-arch1 Kernel Configuration
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# Linux/x86 6.12.9-arch1 Kernel Configuration
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#
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#
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CONFIG_CC_VERSION_TEXT="gcc (GCC) 14.2.1 20240910"
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CONFIG_CC_VERSION_TEXT="gcc (GCC) 14.2.1 20240910"
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CONFIG_CC_IS_GCC=y
|
CONFIG_CC_IS_GCC=y
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CONFIG_GCC_VERSION=140201
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CONFIG_GCC_VERSION=140201
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CONFIG_CLANG_VERSION=0
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CONFIG_CLANG_VERSION=0
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CONFIG_AS_IS_GNU=y
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CONFIG_AS_IS_GNU=y
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CONFIG_AS_VERSION=24300
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CONFIG_AS_VERSION=24301
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CONFIG_LD_IS_BFD=y
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CONFIG_LD_IS_BFD=y
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CONFIG_LD_VERSION=24300
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CONFIG_LD_VERSION=24301
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CONFIG_LLD_VERSION=0
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CONFIG_LLD_VERSION=0
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CONFIG_RUSTC_VERSION=0
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CONFIG_RUSTC_VERSION=0
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CONFIG_RUSTC_LLVM_VERSION=0
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CONFIG_RUSTC_LLVM_VERSION=0
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@@ -1,3 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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version https://git-lfs.github.com/spec/v1
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oid sha256:2c0b58458a245f3073953ed9650706e2134e851108f520d12813d84532f3e164
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oid sha256:fb5e7e402ed03b81ec883292d54ea5e427016533c774714e3d2650dd5fee0423
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size 1703339
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size 1732585
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@@ -1,6 +1,6 @@
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%
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%
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% Thomas Kuschel 2023
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% Thomas Kuschel 2023-2025
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\newcommand{\version}{V6.7}
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\newcommand{\version}{V6.12}
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% preconditions:
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% preconditions:
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% install on ARCH linux:
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% install on ARCH linux:
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% pacman -S texlive-plaingeneric
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% pacman -S texlive-plaingeneric
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@@ -32,27 +32,27 @@
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% Math mode with value and units framework, e.g. for 15.11.18.1
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% Math mode with value and units framework, e.g. for 15.11.18.1
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\usepackage{siunitx}
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\usepackage{siunitx}
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\newcommand{\siunitxversionfrom}{2023-07-31}% range-independent-prefix support added since that day
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%\newcommand{\siunitxversionfrom}{2023-07-31}% range-independent-prefix support added since that day
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\IfPackageAtLeastTF{siunitx}{\siunitxversionfrom}
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%\IfPackageAtLeastTF{siunitx}{\siunitxversionfrom}
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{% new version
|
%{% new version
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\sisetup{
|
\sisetup{
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locale=DE,
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locale=DE,
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exponent-to-prefix=true,
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exponent-to-prefix=true,
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range-independent-prefix=true,
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range-independent-prefix=true,
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per-mode=symbol
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per-mode=symbol
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}
|
}
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\newcommand{\siunitxold}{}
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%\newcommand{\siunitxold}{}
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}
|
%}
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{% old version
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%{% old version
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\sisetup{
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%\sisetup{
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locale=DE,
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% locale=DE,
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exponent-to-prefix=true,
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% exponent-to-prefix=true,
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per-mode=symbol
|
% per-mode=symbol
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}
|
%}
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\newcommand{\siunitxold}{%
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%\newcommand{\siunitxold}{%
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\\Please update your \LaTeX module \textit{siunitx}: The module is older then \siunitxversionfrom
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%\\Please update your \LaTeX module \textit{siunitx}: The module is older then \siunitxversionfrom
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}%
|
%}%
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}%
|
%}%
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|
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\newcommand{\english}[1]{\textit{\scriptsize\selectlanguage{english}#1}\\[0.2em]}
|
\newcommand{\english}[1]{\textit{\scriptsize\selectlanguage{english}#1}\\[0.2em]}
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|
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@@ -130,20 +130,23 @@
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\section*{Linux Configuration \version}
|
\section*{Linux Configuration \version}
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\subsection{Einführung}
|
\subsection{Einführung}
|
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Dieses Dokument dient zur Beschreibung von diversen Einstellungen
|
Dieses Dokument dient zur Beschreibung von diversen Einstellungen
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bei der Konfiguration mittels \texttt{ make menuconfig } unter Linux.\\
|
bei der Konfiguration z.\,B. mittels \texttt{ make menuconfig } unter Linux.\\
|
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Es wird nicht näher darauf eingegangen, wie der Kernel kompiliert wird
|
Es wird nicht näher darauf eingegangen, wie der Kernel kompiliert wird
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oder welche Voreinstellungen, Programme etc. zum Kompilieren benötigt
|
oder welche Voreinstellungen, Programme etc. zum Kompilieren benötigt
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werden.\\
|
werden.\\
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|
Abweichungen zur bestehenden Arch-Linux-Konfiguration werden immer \colorbox{yellow!80}{gelb} markiert.\\
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|
Original Texte, sofern geliefert (englischer Sprache) werden \textit{kursiv} und
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|
etwas kleiner geschrieben.
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Zu Beginn der jeweiligen Konfigurationszeile wird der Standardwert
|
Zu Beginn der jeweiligen Konfigurationszeile wird der Standardwert
|
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(Default) angezeigt. Mein Vorschlag folgt danach.\\
|
(Default) angezeigt. Mein Vorschlag folgt danach.\\
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Z.\,B. bei CONFIG\_WERROR~[=n]~\textbf{[Y]}\\
|
Z.\,B. bei CONFIG\_WERROR~\colorbox{yellow!80}{[=n]~\textbf{[Y]}}\\
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Hier ist der Standarwert ein Nein [n], meine persönliche Einstellung ein Ja [Y].\\[0.5em]
|
Hier ist der Standarwert ein Nein [n], meine persönliche Einstellung ein Ja [Y].\\[0.5em]
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\textit{\copyright KW4NZ, Thomas Kuschel\\Wenn Sie Tippfehler finden oder Korrekturen wünschen,
|
\textit{\copyright KW4NZ, Thomas Kuschel\\Wenn Sie Korrekturen wünschen,
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dann schicken Sie dies mit Erläuterungen und dem Hinweis auf die obenstehende
|
dann schicken Sie dies mit Erläuterungen und dem Hinweis auf die obenstehende
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Version \version ~an:
|
Version \version ~an:
|
||||||
\href{mailto:oe1tkt@gmail.com}{oe1tkt@gmail.com}\\
|
\href{mailto:oe1tkt@gmail.com}{oe1tkt@gmail.com}\\
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\pdftexbanner}
|
\pdftexbanner}
|
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\siunitxold
|
%\siunitxold
|
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|
|
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\subsection{Konfiguration für ein verteiltes Kompilieren auf mehreren Rechnern}
|
\subsection{Konfiguration für ein verteiltes Kompilieren auf mehreren Rechnern}
|
||||||
Sie sollten schon einiges an Erfahrung mit dem Kompilieren unter Linux mitbringen.
|
Sie sollten schon einiges an Erfahrung mit dem Kompilieren unter Linux mitbringen.
|
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|
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@@ -330,7 +330,6 @@ Ermöglicht die Instrumentierung der Sicherheitshaken mit BPF-Programmen zur Imp
|
|||||||
MAC- und Prüfungsrichtlinien. Wenn Sie unsicher sind, wie Sie diese Frage beantworten
|
MAC- und Prüfungsrichtlinien. Wenn Sie unsicher sind, wie Sie diese Frage beantworten
|
||||||
sollten, antworten Sie mit N.
|
sollten, antworten Sie mit N.
|
||||||
\subsection{Preemption Model (Preemptible Kernel (Low-Latency Desktop)) \texorpdfstring{$\rightarrow$}{->}}
|
\subsection{Preemption Model (Preemptible Kernel (Low-Latency Desktop)) \texorpdfstring{$\rightarrow$}{->}}
|
||||||
|
|
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Eingestellt auf : Low-Latency, d.\,h. nur kleine Verzögerungen beim Modell des Multitaskings.
|
Eingestellt auf : Low-Latency, d.\,h. nur kleine Verzögerungen beim Modell des Multitaskings.
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Es gibt drei Einstellungen:
|
Es gibt drei Einstellungen:
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\subsubsection{No Forced Preemption (Server)}
|
\subsubsection{No Forced Preemption (Server)}
|
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@@ -342,14 +341,14 @@ keine Garantie dafür und es kann zu zufälligen, längeren Verzögerungszeiten
|
|||||||
Für einen Serverbetrieb wird diese Einstellung empfohlen, damit der maximale Durchsatz an Rechenleistung
|
Für einen Serverbetrieb wird diese Einstellung empfohlen, damit der maximale Durchsatz an Rechenleistung
|
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entsteht.
|
entsteht.
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\subsubsection{Voluntary Kernel Preemption (Desktop)}
|
\subsubsection{Voluntary Kernel Preemption (Desktop)}
|
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CONFIG\_PREEMPT\_VOLUNTARY [=n] \textbf{[N]}\\
|
CONFIG\_PREEMPT\_VOLUNTARY \colorbox{yellow!80}{[=n] \textbf{[Y]}}\\
|
||||||
Diese Einstellung reduziert die Latenz des Kernels durch zusätzliche \glqq explizite Unterbrechungspunkte\glqq{}
|
Diese Einstellung reduziert die Latenz des Kernels durch zusätzliche \glqq explizite Unterbrechungspunkte\glqq{}
|
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im Kernel.
|
im Kernel.
|
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Diese neuen Unterbrechungspunkte wurden ausgewählt, um die maximale Latenz beim neuerlichen Zuordnen
|
Diese neuen Unterbrechungspunkte wurden ausgewählt, um die maximale Latenz beim neuerlichen Zuordnen
|
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des Schedulers zu reduzieren und dadurch schnelle Reaktionszeiten der Applikationen zu gewährleisten. --
|
des Schedulers zu reduzieren und dadurch schnelle Reaktionszeiten der Applikationen zu gewährleisten. --
|
||||||
Auf Kosten eines geringeren Durchsatzes wird dies erreicht.
|
Auf Kosten eines geringeren Durchsatzes wird dies erreicht.
|
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\subsubsection{Preemptible Kernel (Low-Latency Desktop)}
|
\subsubsection{Preemptible Kernel (Low-Latency Desktop)}
|
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CONFIG\_PREEMPT [=y] \textbf{[Y]}\\
|
CONFIG\_PREEMPT \colorbox{yellow!80}{[=y] \textbf{[N]}}\\
|
||||||
Bei dieser Einstellung wird die Latenz des Kernels weiter erniedrigt indem der gesamte Code des Kernels
|
Bei dieser Einstellung wird die Latenz des Kernels weiter erniedrigt indem der gesamte Code des Kernels
|
||||||
(keine kritischen, geschützten Bereiche) unterbrechbar gemacht wird. Dadurch wird ein reibungsloses
|
(keine kritischen, geschützten Bereiche) unterbrechbar gemacht wird. Dadurch wird ein reibungsloses
|
||||||
Arbeiten mit Applikationen aus Nutzersicht erreicht, sogar unter Volllast.
|
Arbeiten mit Applikationen aus Nutzersicht erreicht, sogar unter Volllast.
|
||||||
@@ -396,7 +395,50 @@ SCHED\_CORE ist standardmäßig deaktiviert. Wenn es aktiviert und unbenutzt ist
|
|||||||
bei Linux-Distributionen wahrscheinlich der Fall ist,
|
bei Linux-Distributionen wahrscheinlich der Fall ist,
|
||||||
sollte es keine messbaren Auswirkungen auf die Leistung
|
sollte es keine messbaren Auswirkungen auf die Leistung
|
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haben.
|
haben.
|
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|
% 1.21 Extensible Scheduling Class (since 6.11)
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|
\subsection{Extensible Scheduling Class {\tiny since 6.12}}
|
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|
CONFIG\_SCHED\_CLASS\_EXT [=y] \textbf{[Y]}\\
|
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|
Diese Option aktiviert eine neue Scheduler-Klasse sched\_ext (SCX), die es ermöglicht,
|
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|
dass Scheduling-Richtlinien
|
||||||
|
als BPF-Programme implementiert werden können, um Folgendes zu erreichen:
|
||||||
|
\begin{itemize}
|
||||||
|
\item [-] Einfaches Experimentieren und Erforschen:
|
||||||
|
Ermöglicht die schnelle Iteration neuer Zeitplanungsrichtlinien.
|
||||||
|
\item [-] Anpassungsfähigkeit: Erstellung von anwendungsspezifischen Schedulern,
|
||||||
|
die Richtlinien implementieren, die für allgemeine Scheduler nicht anwendbar sind.
|
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|
\item [-] Schnelle Scheduler-Implementierungen: Unterbrechungsfreie Auslagerung von Planungsrichtlinien
|
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|
in Produktionsumgebungen.
|
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|
\end{itemize}
|
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|
sched\_ext nutzt die BPF-Funktion struct\_ops,
|
||||||
|
um eine Struktur zu definieren,
|
||||||
|
die Funktionsaufrufe und
|
||||||
|
Flags an BPF-Programme exportiert, die Zeitplanungsrichtlinien implementieren möchten.\\
|
||||||
|
Die struct\_ops-Struktur, die von
|
||||||
|
sched\_ext exportierte Struktur heißt struct sched\_ext\_ops und ist konzeptionell ähnlich wie
|
||||||
|
struct sched\_class.
|
||||||
|
|
||||||
|
Für weitere Informationen:\\
|
||||||
|
Dokumentation/scheduler/sched-ext.rst\\
|
||||||
|
\href{https://github.com/sched-ext/scx}{https://github.com/sched-ext/scx}\\[1em]
|
||||||
|
\begin{small}
|
||||||
|
\textit{
|
||||||
|
This option enables a new scheduler class sched\_ext (SCX), which
|
||||||
|
allows scheduling policies to be implemented as BPF programs to
|
||||||
|
achieve the following:
|
||||||
|
\begin{itemize}
|
||||||
|
\item[-] Ease of experimentation and exploration: Enabling rapid
|
||||||
|
iteration of new scheduling policies.
|
||||||
|
\item[-] Customization: Building application-specific schedulers which
|
||||||
|
implement policies that are not applicable to general-purpose schedulers.
|
||||||
|
\item[-] Rapid scheduler deployments: Non-disruptive swap outs of
|
||||||
|
scheduling policies in production environments.
|
||||||
|
\end{itemize}
|
||||||
|
sched\_ext leverages BPF struct\_ops feature to define a structure
|
||||||
|
which exports function callbacks and flags to BPF programs that
|
||||||
|
wish to implement scheduling policies. The struct\_ops structure
|
||||||
|
exported by sched\_ext is struct sched\_ext\_ops, and is conceptually
|
||||||
|
similar to struct sched\_class.}
|
||||||
|
\end{small}
|
||||||
\subsection{CPU/Task time and stats accounting \texorpdfstring{$\rightarrow$}{->}}
|
\subsection{CPU/Task time and stats accounting \texorpdfstring{$\rightarrow$}{->}}
|
||||||
|
|
||||||
\subsubsection{Cputime accounting (Full dynticks CPU time accounting) \texorpdfstring{$\rightarrow$}{->}}
|
\subsubsection{Cputime accounting (Full dynticks CPU time accounting) \texorpdfstring{$\rightarrow$}{->}}
|
||||||
|
|||||||
217
linux-v6.12.3-arch1.patch
Normal file
217
linux-v6.12.3-arch1.patch
Normal file
@@ -0,0 +1,217 @@
|
|||||||
|
Makefile | 2 +-
|
||||||
|
arch/Kconfig | 4 ++--
|
||||||
|
drivers/firmware/sysfb.c | 18 +++++++++++++++++-
|
||||||
|
include/linux/user_namespace.h | 4 ++++
|
||||||
|
init/Kconfig | 16 ++++++++++++++++
|
||||||
|
kernel/fork.c | 14 ++++++++++++++
|
||||||
|
kernel/sysctl.c | 12 ++++++++++++
|
||||||
|
kernel/user_namespace.c | 7 +++++++
|
||||||
|
8 files changed, 73 insertions(+), 4 deletions(-)
|
||||||
|
|
||||||
|
diff --git a/Makefile b/Makefile
|
||||||
|
index e81030ec6831434373e1b3661dcb495358e1ccb7..adfe952b62367e51d16f20ed676b097461ab96bb 100644
|
||||||
|
--- a/Makefile
|
||||||
|
+++ b/Makefile
|
||||||
|
@@ -2,7 +2,7 @@
|
||||||
|
VERSION = 6
|
||||||
|
PATCHLEVEL = 12
|
||||||
|
SUBLEVEL = 3
|
||||||
|
-EXTRAVERSION =
|
||||||
|
+EXTRAVERSION = -arch1
|
||||||
|
NAME = Baby Opossum Posse
|
||||||
|
|
||||||
|
# *DOCUMENTATION*
|
||||||
|
diff --git a/arch/Kconfig b/arch/Kconfig
|
||||||
|
index bd9f095d69fa0300605b455d1d4f89da77129192..5fc4aa6b6b67a286d2e3541c4ac16839a7a5aedf 100644
|
||||||
|
--- a/arch/Kconfig
|
||||||
|
+++ b/arch/Kconfig
|
||||||
|
@@ -1089,7 +1089,7 @@ config ARCH_MMAP_RND_BITS
|
||||||
|
int "Number of bits to use for ASLR of mmap base address" if EXPERT
|
||||||
|
range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
|
||||||
|
default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
|
||||||
|
- default ARCH_MMAP_RND_BITS_MIN
|
||||||
|
+ default ARCH_MMAP_RND_BITS_MAX
|
||||||
|
depends on HAVE_ARCH_MMAP_RND_BITS
|
||||||
|
help
|
||||||
|
This value can be used to select the number of bits to use to
|
||||||
|
@@ -1123,7 +1123,7 @@ config ARCH_MMAP_RND_COMPAT_BITS
|
||||||
|
int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
|
||||||
|
range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
|
||||||
|
default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
|
||||||
|
- default ARCH_MMAP_RND_COMPAT_BITS_MIN
|
||||||
|
+ default ARCH_MMAP_RND_COMPAT_BITS_MAX
|
||||||
|
depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
|
||||||
|
help
|
||||||
|
This value can be used to select the number of bits to use to
|
||||||
|
diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
|
||||||
|
index a3df782fa687b0f14a2646eccaf635c3bb247b2b..940d8f51434176586bad53de43bd892a7846c177 100644
|
||||||
|
--- a/drivers/firmware/sysfb.c
|
||||||
|
+++ b/drivers/firmware/sysfb.c
|
||||||
|
@@ -35,6 +35,22 @@
|
||||||
|
#include <linux/screen_info.h>
|
||||||
|
#include <linux/sysfb.h>
|
||||||
|
|
||||||
|
+static int skip_simpledrm;
|
||||||
|
+
|
||||||
|
+static int __init simpledrm_disable(char *opt)
|
||||||
|
+{
|
||||||
|
+ if (!opt)
|
||||||
|
+ return -EINVAL;
|
||||||
|
+
|
||||||
|
+ get_option(&opt, &skip_simpledrm);
|
||||||
|
+
|
||||||
|
+ if (skip_simpledrm)
|
||||||
|
+ pr_info("The simpledrm driver will not be probed\n");
|
||||||
|
+
|
||||||
|
+ return 0;
|
||||||
|
+}
|
||||||
|
+early_param("nvidia-drm.modeset", simpledrm_disable);
|
||||||
|
+
|
||||||
|
static struct platform_device *pd;
|
||||||
|
static DEFINE_MUTEX(disable_lock);
|
||||||
|
static bool disabled;
|
||||||
|
@@ -145,7 +161,7 @@ static __init int sysfb_init(void)
|
||||||
|
|
||||||
|
/* try to create a simple-framebuffer device */
|
||||||
|
compatible = sysfb_parse_mode(si, &mode);
|
||||||
|
- if (compatible) {
|
||||||
|
+ if (compatible && !skip_simpledrm) {
|
||||||
|
pd = sysfb_create_simplefb(si, &mode, parent);
|
||||||
|
if (!IS_ERR(pd))
|
||||||
|
goto put_device;
|
||||||
|
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
|
||||||
|
index 7183e5aca28291a02cb186bcd8adba81b635b58f..56573371a2f8aff498768f0f3cbd17bbb8b0e15e 100644
|
||||||
|
--- a/include/linux/user_namespace.h
|
||||||
|
+++ b/include/linux/user_namespace.h
|
||||||
|
@@ -159,6 +159,8 @@ static inline void set_userns_rlimit_max(struct user_namespace *ns,
|
||||||
|
|
||||||
|
#ifdef CONFIG_USER_NS
|
||||||
|
|
||||||
|
+extern int unprivileged_userns_clone;
|
||||||
|
+
|
||||||
|
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
|
||||||
|
{
|
||||||
|
if (ns)
|
||||||
|
@@ -192,6 +194,8 @@ extern bool current_in_userns(const struct user_namespace *target_ns);
|
||||||
|
struct ns_common *ns_get_owner(struct ns_common *ns);
|
||||||
|
#else
|
||||||
|
|
||||||
|
+#define unprivileged_userns_clone 0
|
||||||
|
+
|
||||||
|
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
|
||||||
|
{
|
||||||
|
return &init_user_ns;
|
||||||
|
diff --git a/init/Kconfig b/init/Kconfig
|
||||||
|
index 7256fa127530ff893604722a740885551d50c777..164a449360644bc52e6032e1509ff5c65a068193 100644
|
||||||
|
--- a/init/Kconfig
|
||||||
|
+++ b/init/Kconfig
|
||||||
|
@@ -1309,6 +1309,22 @@ config USER_NS
|
||||||
|
|
||||||
|
If unsure, say N.
|
||||||
|
|
||||||
|
+config USER_NS_UNPRIVILEGED
|
||||||
|
+ bool "Allow unprivileged users to create namespaces"
|
||||||
|
+ default y
|
||||||
|
+ depends on USER_NS
|
||||||
|
+ help
|
||||||
|
+ When disabled, unprivileged users will not be able to create
|
||||||
|
+ new namespaces. Allowing users to create their own namespaces
|
||||||
|
+ has been part of several recent local privilege escalation
|
||||||
|
+ exploits, so if you need user namespaces but are
|
||||||
|
+ paranoid^Wsecurity-conscious you want to disable this.
|
||||||
|
+
|
||||||
|
+ This setting can be overridden at runtime via the
|
||||||
|
+ kernel.unprivileged_userns_clone sysctl.
|
||||||
|
+
|
||||||
|
+ If unsure, say Y.
|
||||||
|
+
|
||||||
|
config PID_NS
|
||||||
|
bool "PID Namespaces"
|
||||||
|
default y
|
||||||
|
diff --git a/kernel/fork.c b/kernel/fork.c
|
||||||
|
index ce8be55e5e04b31faff120fff14c396372e9f1e5..e97e527cec69d7adaad8365c7ea8a1f54c86445b 100644
|
||||||
|
--- a/kernel/fork.c
|
||||||
|
+++ b/kernel/fork.c
|
||||||
|
@@ -107,6 +107,10 @@
|
||||||
|
#include <linux/pidfs.h>
|
||||||
|
#include <linux/tick.h>
|
||||||
|
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+#include <linux/user_namespace.h>
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
#include <asm/pgalloc.h>
|
||||||
|
#include <linux/uaccess.h>
|
||||||
|
#include <asm/mmu_context.h>
|
||||||
|
@@ -2158,6 +2162,10 @@ __latent_entropy struct task_struct *copy_process(
|
||||||
|
if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
|
||||||
|
return ERR_PTR(-EINVAL);
|
||||||
|
|
||||||
|
+ if ((clone_flags & CLONE_NEWUSER) && !unprivileged_userns_clone)
|
||||||
|
+ if (!capable(CAP_SYS_ADMIN))
|
||||||
|
+ return ERR_PTR(-EPERM);
|
||||||
|
+
|
||||||
|
/*
|
||||||
|
* Thread groups must share signals as well, and detached threads
|
||||||
|
* can only be started up within the thread group.
|
||||||
|
@@ -3311,6 +3319,12 @@ int ksys_unshare(unsigned long unshare_flags)
|
||||||
|
if (unshare_flags & CLONE_NEWNS)
|
||||||
|
unshare_flags |= CLONE_FS;
|
||||||
|
|
||||||
|
+ if ((unshare_flags & CLONE_NEWUSER) && !unprivileged_userns_clone) {
|
||||||
|
+ err = -EPERM;
|
||||||
|
+ if (!capable(CAP_SYS_ADMIN))
|
||||||
|
+ goto bad_unshare_out;
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
err = check_unshare_flags(unshare_flags);
|
||||||
|
if (err)
|
||||||
|
goto bad_unshare_out;
|
||||||
|
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
|
||||||
|
index 79e6cb1d5c48f8e4f48580114f09bed9d65481af..676e89dc38c339cfb7042f5d9ad825fea9d7b19b 100644
|
||||||
|
--- a/kernel/sysctl.c
|
||||||
|
+++ b/kernel/sysctl.c
|
||||||
|
@@ -80,6 +80,9 @@
|
||||||
|
#ifdef CONFIG_RT_MUTEXES
|
||||||
|
#include <linux/rtmutex.h>
|
||||||
|
#endif
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+#include <linux/user_namespace.h>
|
||||||
|
+#endif
|
||||||
|
|
||||||
|
/* shared constants to be used in various sysctls */
|
||||||
|
const int sysctl_vals[] = { 0, 1, 2, 3, 4, 100, 200, 1000, 3000, INT_MAX, 65535, -1 };
|
||||||
|
@@ -1618,6 +1621,15 @@ static struct ctl_table kern_table[] = {
|
||||||
|
.mode = 0644,
|
||||||
|
.proc_handler = proc_dointvec,
|
||||||
|
},
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+ {
|
||||||
|
+ .procname = "unprivileged_userns_clone",
|
||||||
|
+ .data = &unprivileged_userns_clone,
|
||||||
|
+ .maxlen = sizeof(int),
|
||||||
|
+ .mode = 0644,
|
||||||
|
+ .proc_handler = proc_dointvec,
|
||||||
|
+ },
|
||||||
|
+#endif
|
||||||
|
#ifdef CONFIG_PROC_SYSCTL
|
||||||
|
{
|
||||||
|
.procname = "tainted",
|
||||||
|
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
|
||||||
|
index aa0b2e47f2f21bef96c45e09aaa4bc05dc5216b9..d74d857b1696077ae00e87af3de1afc76425d538 100644
|
||||||
|
--- a/kernel/user_namespace.c
|
||||||
|
+++ b/kernel/user_namespace.c
|
||||||
|
@@ -22,6 +22,13 @@
|
||||||
|
#include <linux/bsearch.h>
|
||||||
|
#include <linux/sort.h>
|
||||||
|
|
||||||
|
+/* sysctl */
|
||||||
|
+#ifdef CONFIG_USER_NS_UNPRIVILEGED
|
||||||
|
+int unprivileged_userns_clone = 1;
|
||||||
|
+#else
|
||||||
|
+int unprivileged_userns_clone;
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
static struct kmem_cache *user_ns_cachep __ro_after_init;
|
||||||
|
static DEFINE_MUTEX(userns_state_mutex);
|
||||||
|
|
||||||
217
linux-v6.12.6-arch1.patch
Normal file
217
linux-v6.12.6-arch1.patch
Normal file
@@ -0,0 +1,217 @@
|
|||||||
|
Makefile | 2 +-
|
||||||
|
arch/Kconfig | 4 ++--
|
||||||
|
drivers/firmware/sysfb.c | 18 +++++++++++++++++-
|
||||||
|
include/linux/user_namespace.h | 4 ++++
|
||||||
|
init/Kconfig | 16 ++++++++++++++++
|
||||||
|
kernel/fork.c | 14 ++++++++++++++
|
||||||
|
kernel/sysctl.c | 12 ++++++++++++
|
||||||
|
kernel/user_namespace.c | 7 +++++++
|
||||||
|
8 files changed, 73 insertions(+), 4 deletions(-)
|
||||||
|
|
||||||
|
diff --git a/Makefile b/Makefile
|
||||||
|
index c10952585c14b083349926e4b3a835604d86e8d7..fbeb1cc86345c3e9f0cca646343aba0f8c7bb4c3 100644
|
||||||
|
--- a/Makefile
|
||||||
|
+++ b/Makefile
|
||||||
|
@@ -2,7 +2,7 @@
|
||||||
|
VERSION = 6
|
||||||
|
PATCHLEVEL = 12
|
||||||
|
SUBLEVEL = 6
|
||||||
|
-EXTRAVERSION =
|
||||||
|
+EXTRAVERSION = -arch1
|
||||||
|
NAME = Baby Opossum Posse
|
||||||
|
|
||||||
|
# *DOCUMENTATION*
|
||||||
|
diff --git a/arch/Kconfig b/arch/Kconfig
|
||||||
|
index bd9f095d69fa0300605b455d1d4f89da77129192..5fc4aa6b6b67a286d2e3541c4ac16839a7a5aedf 100644
|
||||||
|
--- a/arch/Kconfig
|
||||||
|
+++ b/arch/Kconfig
|
||||||
|
@@ -1089,7 +1089,7 @@ config ARCH_MMAP_RND_BITS
|
||||||
|
int "Number of bits to use for ASLR of mmap base address" if EXPERT
|
||||||
|
range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
|
||||||
|
default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
|
||||||
|
- default ARCH_MMAP_RND_BITS_MIN
|
||||||
|
+ default ARCH_MMAP_RND_BITS_MAX
|
||||||
|
depends on HAVE_ARCH_MMAP_RND_BITS
|
||||||
|
help
|
||||||
|
This value can be used to select the number of bits to use to
|
||||||
|
@@ -1123,7 +1123,7 @@ config ARCH_MMAP_RND_COMPAT_BITS
|
||||||
|
int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
|
||||||
|
range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
|
||||||
|
default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
|
||||||
|
- default ARCH_MMAP_RND_COMPAT_BITS_MIN
|
||||||
|
+ default ARCH_MMAP_RND_COMPAT_BITS_MAX
|
||||||
|
depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
|
||||||
|
help
|
||||||
|
This value can be used to select the number of bits to use to
|
||||||
|
diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
|
||||||
|
index a3df782fa687b0f14a2646eccaf635c3bb247b2b..940d8f51434176586bad53de43bd892a7846c177 100644
|
||||||
|
--- a/drivers/firmware/sysfb.c
|
||||||
|
+++ b/drivers/firmware/sysfb.c
|
||||||
|
@@ -35,6 +35,22 @@
|
||||||
|
#include <linux/screen_info.h>
|
||||||
|
#include <linux/sysfb.h>
|
||||||
|
|
||||||
|
+static int skip_simpledrm;
|
||||||
|
+
|
||||||
|
+static int __init simpledrm_disable(char *opt)
|
||||||
|
+{
|
||||||
|
+ if (!opt)
|
||||||
|
+ return -EINVAL;
|
||||||
|
+
|
||||||
|
+ get_option(&opt, &skip_simpledrm);
|
||||||
|
+
|
||||||
|
+ if (skip_simpledrm)
|
||||||
|
+ pr_info("The simpledrm driver will not be probed\n");
|
||||||
|
+
|
||||||
|
+ return 0;
|
||||||
|
+}
|
||||||
|
+early_param("nvidia-drm.modeset", simpledrm_disable);
|
||||||
|
+
|
||||||
|
static struct platform_device *pd;
|
||||||
|
static DEFINE_MUTEX(disable_lock);
|
||||||
|
static bool disabled;
|
||||||
|
@@ -145,7 +161,7 @@ static __init int sysfb_init(void)
|
||||||
|
|
||||||
|
/* try to create a simple-framebuffer device */
|
||||||
|
compatible = sysfb_parse_mode(si, &mode);
|
||||||
|
- if (compatible) {
|
||||||
|
+ if (compatible && !skip_simpledrm) {
|
||||||
|
pd = sysfb_create_simplefb(si, &mode, parent);
|
||||||
|
if (!IS_ERR(pd))
|
||||||
|
goto put_device;
|
||||||
|
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
|
||||||
|
index 7183e5aca28291a02cb186bcd8adba81b635b58f..56573371a2f8aff498768f0f3cbd17bbb8b0e15e 100644
|
||||||
|
--- a/include/linux/user_namespace.h
|
||||||
|
+++ b/include/linux/user_namespace.h
|
||||||
|
@@ -159,6 +159,8 @@ static inline void set_userns_rlimit_max(struct user_namespace *ns,
|
||||||
|
|
||||||
|
#ifdef CONFIG_USER_NS
|
||||||
|
|
||||||
|
+extern int unprivileged_userns_clone;
|
||||||
|
+
|
||||||
|
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
|
||||||
|
{
|
||||||
|
if (ns)
|
||||||
|
@@ -192,6 +194,8 @@ extern bool current_in_userns(const struct user_namespace *target_ns);
|
||||||
|
struct ns_common *ns_get_owner(struct ns_common *ns);
|
||||||
|
#else
|
||||||
|
|
||||||
|
+#define unprivileged_userns_clone 0
|
||||||
|
+
|
||||||
|
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
|
||||||
|
{
|
||||||
|
return &init_user_ns;
|
||||||
|
diff --git a/init/Kconfig b/init/Kconfig
|
||||||
|
index 7256fa127530ff893604722a740885551d50c777..164a449360644bc52e6032e1509ff5c65a068193 100644
|
||||||
|
--- a/init/Kconfig
|
||||||
|
+++ b/init/Kconfig
|
||||||
|
@@ -1309,6 +1309,22 @@ config USER_NS
|
||||||
|
|
||||||
|
If unsure, say N.
|
||||||
|
|
||||||
|
+config USER_NS_UNPRIVILEGED
|
||||||
|
+ bool "Allow unprivileged users to create namespaces"
|
||||||
|
+ default y
|
||||||
|
+ depends on USER_NS
|
||||||
|
+ help
|
||||||
|
+ When disabled, unprivileged users will not be able to create
|
||||||
|
+ new namespaces. Allowing users to create their own namespaces
|
||||||
|
+ has been part of several recent local privilege escalation
|
||||||
|
+ exploits, so if you need user namespaces but are
|
||||||
|
+ paranoid^Wsecurity-conscious you want to disable this.
|
||||||
|
+
|
||||||
|
+ This setting can be overridden at runtime via the
|
||||||
|
+ kernel.unprivileged_userns_clone sysctl.
|
||||||
|
+
|
||||||
|
+ If unsure, say Y.
|
||||||
|
+
|
||||||
|
config PID_NS
|
||||||
|
bool "PID Namespaces"
|
||||||
|
default y
|
||||||
|
diff --git a/kernel/fork.c b/kernel/fork.c
|
||||||
|
index ce8be55e5e04b31faff120fff14c396372e9f1e5..e97e527cec69d7adaad8365c7ea8a1f54c86445b 100644
|
||||||
|
--- a/kernel/fork.c
|
||||||
|
+++ b/kernel/fork.c
|
||||||
|
@@ -107,6 +107,10 @@
|
||||||
|
#include <linux/pidfs.h>
|
||||||
|
#include <linux/tick.h>
|
||||||
|
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+#include <linux/user_namespace.h>
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
#include <asm/pgalloc.h>
|
||||||
|
#include <linux/uaccess.h>
|
||||||
|
#include <asm/mmu_context.h>
|
||||||
|
@@ -2158,6 +2162,10 @@ __latent_entropy struct task_struct *copy_process(
|
||||||
|
if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
|
||||||
|
return ERR_PTR(-EINVAL);
|
||||||
|
|
||||||
|
+ if ((clone_flags & CLONE_NEWUSER) && !unprivileged_userns_clone)
|
||||||
|
+ if (!capable(CAP_SYS_ADMIN))
|
||||||
|
+ return ERR_PTR(-EPERM);
|
||||||
|
+
|
||||||
|
/*
|
||||||
|
* Thread groups must share signals as well, and detached threads
|
||||||
|
* can only be started up within the thread group.
|
||||||
|
@@ -3311,6 +3319,12 @@ int ksys_unshare(unsigned long unshare_flags)
|
||||||
|
if (unshare_flags & CLONE_NEWNS)
|
||||||
|
unshare_flags |= CLONE_FS;
|
||||||
|
|
||||||
|
+ if ((unshare_flags & CLONE_NEWUSER) && !unprivileged_userns_clone) {
|
||||||
|
+ err = -EPERM;
|
||||||
|
+ if (!capable(CAP_SYS_ADMIN))
|
||||||
|
+ goto bad_unshare_out;
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
err = check_unshare_flags(unshare_flags);
|
||||||
|
if (err)
|
||||||
|
goto bad_unshare_out;
|
||||||
|
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
|
||||||
|
index 79e6cb1d5c48f8e4f48580114f09bed9d65481af..676e89dc38c339cfb7042f5d9ad825fea9d7b19b 100644
|
||||||
|
--- a/kernel/sysctl.c
|
||||||
|
+++ b/kernel/sysctl.c
|
||||||
|
@@ -80,6 +80,9 @@
|
||||||
|
#ifdef CONFIG_RT_MUTEXES
|
||||||
|
#include <linux/rtmutex.h>
|
||||||
|
#endif
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+#include <linux/user_namespace.h>
|
||||||
|
+#endif
|
||||||
|
|
||||||
|
/* shared constants to be used in various sysctls */
|
||||||
|
const int sysctl_vals[] = { 0, 1, 2, 3, 4, 100, 200, 1000, 3000, INT_MAX, 65535, -1 };
|
||||||
|
@@ -1618,6 +1621,15 @@ static struct ctl_table kern_table[] = {
|
||||||
|
.mode = 0644,
|
||||||
|
.proc_handler = proc_dointvec,
|
||||||
|
},
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+ {
|
||||||
|
+ .procname = "unprivileged_userns_clone",
|
||||||
|
+ .data = &unprivileged_userns_clone,
|
||||||
|
+ .maxlen = sizeof(int),
|
||||||
|
+ .mode = 0644,
|
||||||
|
+ .proc_handler = proc_dointvec,
|
||||||
|
+ },
|
||||||
|
+#endif
|
||||||
|
#ifdef CONFIG_PROC_SYSCTL
|
||||||
|
{
|
||||||
|
.procname = "tainted",
|
||||||
|
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
|
||||||
|
index aa0b2e47f2f21bef96c45e09aaa4bc05dc5216b9..d74d857b1696077ae00e87af3de1afc76425d538 100644
|
||||||
|
--- a/kernel/user_namespace.c
|
||||||
|
+++ b/kernel/user_namespace.c
|
||||||
|
@@ -22,6 +22,13 @@
|
||||||
|
#include <linux/bsearch.h>
|
||||||
|
#include <linux/sort.h>
|
||||||
|
|
||||||
|
+/* sysctl */
|
||||||
|
+#ifdef CONFIG_USER_NS_UNPRIVILEGED
|
||||||
|
+int unprivileged_userns_clone = 1;
|
||||||
|
+#else
|
||||||
|
+int unprivileged_userns_clone;
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
static struct kmem_cache *user_ns_cachep __ro_after_init;
|
||||||
|
static DEFINE_MUTEX(userns_state_mutex);
|
||||||
|
|
||||||
230
linux-v6.12.7-arch1.patch
Normal file
230
linux-v6.12.7-arch1.patch
Normal file
@@ -0,0 +1,230 @@
|
|||||||
|
Makefile | 2 +-
|
||||||
|
arch/Kconfig | 4 ++--
|
||||||
|
drivers/firmware/sysfb.c | 18 +++++++++++++++++-
|
||||||
|
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
|
||||||
|
include/linux/user_namespace.h | 4 ++++
|
||||||
|
init/Kconfig | 16 ++++++++++++++++
|
||||||
|
kernel/fork.c | 14 ++++++++++++++
|
||||||
|
kernel/sysctl.c | 12 ++++++++++++
|
||||||
|
kernel/user_namespace.c | 7 +++++++
|
||||||
|
9 files changed, 74 insertions(+), 4 deletions(-)
|
||||||
|
|
||||||
|
diff --git a/Makefile b/Makefile
|
||||||
|
index 685a57f6c8d27963173944785fdc88c0ce158c45..000e55b91c868f3491f358add79bd9b2b4820e8e 100644
|
||||||
|
--- a/Makefile
|
||||||
|
+++ b/Makefile
|
||||||
|
@@ -2,7 +2,7 @@
|
||||||
|
VERSION = 6
|
||||||
|
PATCHLEVEL = 12
|
||||||
|
SUBLEVEL = 7
|
||||||
|
-EXTRAVERSION =
|
||||||
|
+EXTRAVERSION = -arch1
|
||||||
|
NAME = Baby Opossum Posse
|
||||||
|
|
||||||
|
# *DOCUMENTATION*
|
||||||
|
diff --git a/arch/Kconfig b/arch/Kconfig
|
||||||
|
index bd9f095d69fa0300605b455d1d4f89da77129192..5fc4aa6b6b67a286d2e3541c4ac16839a7a5aedf 100644
|
||||||
|
--- a/arch/Kconfig
|
||||||
|
+++ b/arch/Kconfig
|
||||||
|
@@ -1089,7 +1089,7 @@ config ARCH_MMAP_RND_BITS
|
||||||
|
int "Number of bits to use for ASLR of mmap base address" if EXPERT
|
||||||
|
range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
|
||||||
|
default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
|
||||||
|
- default ARCH_MMAP_RND_BITS_MIN
|
||||||
|
+ default ARCH_MMAP_RND_BITS_MAX
|
||||||
|
depends on HAVE_ARCH_MMAP_RND_BITS
|
||||||
|
help
|
||||||
|
This value can be used to select the number of bits to use to
|
||||||
|
@@ -1123,7 +1123,7 @@ config ARCH_MMAP_RND_COMPAT_BITS
|
||||||
|
int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
|
||||||
|
range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
|
||||||
|
default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
|
||||||
|
- default ARCH_MMAP_RND_COMPAT_BITS_MIN
|
||||||
|
+ default ARCH_MMAP_RND_COMPAT_BITS_MAX
|
||||||
|
depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
|
||||||
|
help
|
||||||
|
This value can be used to select the number of bits to use to
|
||||||
|
diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
|
||||||
|
index a3df782fa687b0f14a2646eccaf635c3bb247b2b..940d8f51434176586bad53de43bd892a7846c177 100644
|
||||||
|
--- a/drivers/firmware/sysfb.c
|
||||||
|
+++ b/drivers/firmware/sysfb.c
|
||||||
|
@@ -35,6 +35,22 @@
|
||||||
|
#include <linux/screen_info.h>
|
||||||
|
#include <linux/sysfb.h>
|
||||||
|
|
||||||
|
+static int skip_simpledrm;
|
||||||
|
+
|
||||||
|
+static int __init simpledrm_disable(char *opt)
|
||||||
|
+{
|
||||||
|
+ if (!opt)
|
||||||
|
+ return -EINVAL;
|
||||||
|
+
|
||||||
|
+ get_option(&opt, &skip_simpledrm);
|
||||||
|
+
|
||||||
|
+ if (skip_simpledrm)
|
||||||
|
+ pr_info("The simpledrm driver will not be probed\n");
|
||||||
|
+
|
||||||
|
+ return 0;
|
||||||
|
+}
|
||||||
|
+early_param("nvidia-drm.modeset", simpledrm_disable);
|
||||||
|
+
|
||||||
|
static struct platform_device *pd;
|
||||||
|
static DEFINE_MUTEX(disable_lock);
|
||||||
|
static bool disabled;
|
||||||
|
@@ -145,7 +161,7 @@ static __init int sysfb_init(void)
|
||||||
|
|
||||||
|
/* try to create a simple-framebuffer device */
|
||||||
|
compatible = sysfb_parse_mode(si, &mode);
|
||||||
|
- if (compatible) {
|
||||||
|
+ if (compatible && !skip_simpledrm) {
|
||||||
|
pd = sysfb_create_simplefb(si, &mode, parent);
|
||||||
|
if (!IS_ERR(pd))
|
||||||
|
goto put_device;
|
||||||
|
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
|
||||||
|
index 51904906545e5975de775ce3dafee6a3df4a3397..ad4cd84e40f28d439c10dafeb0724793df5624bd 100644
|
||||||
|
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
|
||||||
|
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
|
||||||
|
@@ -3723,6 +3723,7 @@ static int amdgpu_device_ip_resume_phase3(struct amdgpu_device *adev)
|
||||||
|
r = adev->ip_blocks[i].version->funcs->resume(adev);
|
||||||
|
if (r)
|
||||||
|
return r;
|
||||||
|
+ adev->ip_blocks[i].status.hw = true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
|
||||||
|
index 7183e5aca28291a02cb186bcd8adba81b635b58f..56573371a2f8aff498768f0f3cbd17bbb8b0e15e 100644
|
||||||
|
--- a/include/linux/user_namespace.h
|
||||||
|
+++ b/include/linux/user_namespace.h
|
||||||
|
@@ -159,6 +159,8 @@ static inline void set_userns_rlimit_max(struct user_namespace *ns,
|
||||||
|
|
||||||
|
#ifdef CONFIG_USER_NS
|
||||||
|
|
||||||
|
+extern int unprivileged_userns_clone;
|
||||||
|
+
|
||||||
|
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
|
||||||
|
{
|
||||||
|
if (ns)
|
||||||
|
@@ -192,6 +194,8 @@ extern bool current_in_userns(const struct user_namespace *target_ns);
|
||||||
|
struct ns_common *ns_get_owner(struct ns_common *ns);
|
||||||
|
#else
|
||||||
|
|
||||||
|
+#define unprivileged_userns_clone 0
|
||||||
|
+
|
||||||
|
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
|
||||||
|
{
|
||||||
|
return &init_user_ns;
|
||||||
|
diff --git a/init/Kconfig b/init/Kconfig
|
||||||
|
index 7256fa127530ff893604722a740885551d50c777..164a449360644bc52e6032e1509ff5c65a068193 100644
|
||||||
|
--- a/init/Kconfig
|
||||||
|
+++ b/init/Kconfig
|
||||||
|
@@ -1309,6 +1309,22 @@ config USER_NS
|
||||||
|
|
||||||
|
If unsure, say N.
|
||||||
|
|
||||||
|
+config USER_NS_UNPRIVILEGED
|
||||||
|
+ bool "Allow unprivileged users to create namespaces"
|
||||||
|
+ default y
|
||||||
|
+ depends on USER_NS
|
||||||
|
+ help
|
||||||
|
+ When disabled, unprivileged users will not be able to create
|
||||||
|
+ new namespaces. Allowing users to create their own namespaces
|
||||||
|
+ has been part of several recent local privilege escalation
|
||||||
|
+ exploits, so if you need user namespaces but are
|
||||||
|
+ paranoid^Wsecurity-conscious you want to disable this.
|
||||||
|
+
|
||||||
|
+ This setting can be overridden at runtime via the
|
||||||
|
+ kernel.unprivileged_userns_clone sysctl.
|
||||||
|
+
|
||||||
|
+ If unsure, say Y.
|
||||||
|
+
|
||||||
|
config PID_NS
|
||||||
|
bool "PID Namespaces"
|
||||||
|
default y
|
||||||
|
diff --git a/kernel/fork.c b/kernel/fork.c
|
||||||
|
index ce8be55e5e04b31faff120fff14c396372e9f1e5..e97e527cec69d7adaad8365c7ea8a1f54c86445b 100644
|
||||||
|
--- a/kernel/fork.c
|
||||||
|
+++ b/kernel/fork.c
|
||||||
|
@@ -107,6 +107,10 @@
|
||||||
|
#include <linux/pidfs.h>
|
||||||
|
#include <linux/tick.h>
|
||||||
|
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+#include <linux/user_namespace.h>
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
#include <asm/pgalloc.h>
|
||||||
|
#include <linux/uaccess.h>
|
||||||
|
#include <asm/mmu_context.h>
|
||||||
|
@@ -2158,6 +2162,10 @@ __latent_entropy struct task_struct *copy_process(
|
||||||
|
if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
|
||||||
|
return ERR_PTR(-EINVAL);
|
||||||
|
|
||||||
|
+ if ((clone_flags & CLONE_NEWUSER) && !unprivileged_userns_clone)
|
||||||
|
+ if (!capable(CAP_SYS_ADMIN))
|
||||||
|
+ return ERR_PTR(-EPERM);
|
||||||
|
+
|
||||||
|
/*
|
||||||
|
* Thread groups must share signals as well, and detached threads
|
||||||
|
* can only be started up within the thread group.
|
||||||
|
@@ -3311,6 +3319,12 @@ int ksys_unshare(unsigned long unshare_flags)
|
||||||
|
if (unshare_flags & CLONE_NEWNS)
|
||||||
|
unshare_flags |= CLONE_FS;
|
||||||
|
|
||||||
|
+ if ((unshare_flags & CLONE_NEWUSER) && !unprivileged_userns_clone) {
|
||||||
|
+ err = -EPERM;
|
||||||
|
+ if (!capable(CAP_SYS_ADMIN))
|
||||||
|
+ goto bad_unshare_out;
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
err = check_unshare_flags(unshare_flags);
|
||||||
|
if (err)
|
||||||
|
goto bad_unshare_out;
|
||||||
|
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
|
||||||
|
index 79e6cb1d5c48f8e4f48580114f09bed9d65481af..676e89dc38c339cfb7042f5d9ad825fea9d7b19b 100644
|
||||||
|
--- a/kernel/sysctl.c
|
||||||
|
+++ b/kernel/sysctl.c
|
||||||
|
@@ -80,6 +80,9 @@
|
||||||
|
#ifdef CONFIG_RT_MUTEXES
|
||||||
|
#include <linux/rtmutex.h>
|
||||||
|
#endif
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+#include <linux/user_namespace.h>
|
||||||
|
+#endif
|
||||||
|
|
||||||
|
/* shared constants to be used in various sysctls */
|
||||||
|
const int sysctl_vals[] = { 0, 1, 2, 3, 4, 100, 200, 1000, 3000, INT_MAX, 65535, -1 };
|
||||||
|
@@ -1618,6 +1621,15 @@ static struct ctl_table kern_table[] = {
|
||||||
|
.mode = 0644,
|
||||||
|
.proc_handler = proc_dointvec,
|
||||||
|
},
|
||||||
|
+#ifdef CONFIG_USER_NS
|
||||||
|
+ {
|
||||||
|
+ .procname = "unprivileged_userns_clone",
|
||||||
|
+ .data = &unprivileged_userns_clone,
|
||||||
|
+ .maxlen = sizeof(int),
|
||||||
|
+ .mode = 0644,
|
||||||
|
+ .proc_handler = proc_dointvec,
|
||||||
|
+ },
|
||||||
|
+#endif
|
||||||
|
#ifdef CONFIG_PROC_SYSCTL
|
||||||
|
{
|
||||||
|
.procname = "tainted",
|
||||||
|
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
|
||||||
|
index aa0b2e47f2f21bef96c45e09aaa4bc05dc5216b9..d74d857b1696077ae00e87af3de1afc76425d538 100644
|
||||||
|
--- a/kernel/user_namespace.c
|
||||||
|
+++ b/kernel/user_namespace.c
|
||||||
|
@@ -22,6 +22,13 @@
|
||||||
|
#include <linux/bsearch.h>
|
||||||
|
#include <linux/sort.h>
|
||||||
|
|
||||||
|
+/* sysctl */
|
||||||
|
+#ifdef CONFIG_USER_NS_UNPRIVILEGED
|
||||||
|
+int unprivileged_userns_clone = 1;
|
||||||
|
+#else
|
||||||
|
+int unprivileged_userns_clone;
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
static struct kmem_cache *user_ns_cachep __ro_after_init;
|
||||||
|
static DEFINE_MUTEX(userns_state_mutex);
|
||||||
|
|
||||||
Reference in New Issue
Block a user