exec: imply NoNewPriviliges= only when seccomp filters are used in user mode

[elogind.git] / man / systemd.exec.xml

diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 413d81d330f1e6f93fc0f07512284786c6a626ef..9224f1ef3d5e38afcb6e2d83b4fc08f3a1f24244 100644 (file)
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -1010,8 +1010,8 @@
                         <varlistentry>
                                 <term><varname>SystemCallFilter=</varname></term>
 
                         <varlistentry>
                                 <term><varname>SystemCallFilter=</varname></term>
 

-                                <listitem><para>Takes a space-separated
-                                list of system call
+                                <listitem><para>Takes a
+                                space-separated list of system call

                                 names. If this setting is used, all
                                 system calls executed by the unit
                                 processes except for the listed ones
                                 names. If this setting is used, all
                                 system calls executed by the unit
                                 processes except for the listed ones


@@ -1023,12 +1023,13 @@
                                 the effect is inverted: only the
                                 listed system calls will result in
                                 immediate process termination
                                 the effect is inverted: only the
                                 listed system calls will result in
                                 immediate process termination

-                                (blacklisting). If this option is used,
+                                (blacklisting). If running in user
+                                mode and this option is used,

                                 <varname>NoNewPrivileges=yes</varname>
                                 <varname>NoNewPrivileges=yes</varname>

-                                is implied. This feature makes use of
-                                the Secure Computing Mode 2 interfaces
-                                of the kernel ('seccomp filtering')
-                                and is useful for enforcing a minimal
+                                is implied. This feature makes use of the
+                                Secure Computing Mode 2 interfaces of
+                                the kernel ('seccomp filtering') and
+                                is useful for enforcing a minimal

                                 sandboxing environment. Note that the
                                 <function>execve</function>,
                                 <function>rt_sigreturn</function>,
                                 sandboxing environment. Note that the
                                 <function>execve</function>,
                                 <function>rt_sigreturn</function>,


@@ -1096,28 +1097,31 @@
                                 <constant>x86</constant>,
                                 <constant>x86-64</constant>,
                                 <constant>x32</constant>,
                                 <constant>x86</constant>,
                                 <constant>x86-64</constant>,
                                 <constant>x32</constant>,

-                                <constant>arm</constant> as well as the
-                                special identifier
-                                <constant>native</constant>. Only system
-                                calls of the specified architectures
-                                will be permitted to processes of this
-                                unit. This is an effective way to
-                                disable compatibility with non-native
-                                architectures for processes, for
-                                example to prohibit execution of
-                                32-bit x86 binaries on 64-bit x86-64
-                                systems. The special
+                                <constant>arm</constant> as well as
+                                the special identifier
+                                <constant>native</constant>. Only
+                                system calls of the specified
+                                architectures will be permitted to
+                                processes of this unit. This is an
+                                effective way to disable compatibility
+                                with non-native architectures for
+                                processes, for example to prohibit
+                                execution of 32-bit x86 binaries on
+                                64-bit x86-64 systems. The special

                                 <constant>native</constant> identifier
                                 implicitly maps to the native
                                 architecture of the system (or more
                                 strictly: to the architecture the
                                 <constant>native</constant> identifier
                                 implicitly maps to the native
                                 architecture of the system (or more
                                 strictly: to the architecture the

-                                system manager is compiled for). Note
-                                that setting this option to a
-                                non-empty list implies that
-                                <constant>native</constant> is included
-                                too. By default, this option is set to
-                                the empty list, i.e. no architecture
-                                system call filtering is
+                                system manager is compiled for). If
+                                running in user mode and this option
+                                is used,
+                                <varname>NoNewPrivileges=yes</varname>
+                                is implied. Note that setting this
+                                option to a non-empty list implies
+                                that <constant>native</constant> is
+                                included too. By default, this option
+                                is set to the empty list, i.e. no
+                                architecture system call filtering is

                                 applied.</para></listitem>
                         </varlistentry>
 
                                 applied.</para></listitem>
                         </varlistentry>
 


@@ -1149,7 +1153,10 @@
                                 sockets only) are unaffected. Note
                                 that this option has no effect on
                                 32bit x86 and is ignored (but works
                                 sockets only) are unaffected. Note
                                 that this option has no effect on
                                 32bit x86 and is ignored (but works

-                                correctly on x86-64). By default no
+                                correctly on x86-64). If running in user
+                                mode and this option is used,
+                                <varname>NoNewPrivileges=yes</varname>
+                                is implied. By default no

                                 restriction applies, all address
                                 families are accessible to
                                 processes. If assigned the empty
                                 restriction applies, all address
                                 families are accessible to
                                 processes. If assigned the empty