1alsa_selinux(8) SELinux Policy alsa alsa_selinux(8)
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6 alsa_selinux - Security Enhanced Linux Policy for the alsa processes
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9 Security-Enhanced Linux secures the alsa processes via flexible manda‐
10 tory access control.
11 The alsa processes execute with the alsa_t SELinux type. You can check
13 if you have these processes running by executing the ps command with
14 the -Z qualifier.
15 For example:
17 ps -eZ | grep alsa_t
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23 The alsa_t SELinux type can be entered via the alsa_exec_t file type.
24 The default entrypoint paths for the alsa_t domain are the following:
26 /sbin/salsa, /sbin/alsactl, /usr/bin/ainit, /bin/alsaunmute,
28 /usr/sbin/salsa, /usr/sbin/alsactl, /usr/bin/alsaunmute
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31 SELinux defines process types (domains) for each process running on the
32 system
33 You can see the context of a process using the -Z option to ps
35 Policy governs the access confined processes have to files. SELinux
37 alsa policy is very flexible allowing users to setup their alsa pro‐
38 cesses in as secure a method as possible.
39 The following process types are defined for alsa:
41 alsa_t
43 Note: semanage permissive -a alsa_t can be used to make the process
45 type alsa_t permissive. SELinux does not deny access to permissive
46 process types, but the AVC (SELinux denials) messages are still gener‐
47 ated.
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51 SELinux policy is customizable based on least access required. alsa
52 policy is extremely flexible and has several booleans that allow you to
53 manipulate the policy and run alsa with the tightest access possible.
54 If you want to allow all domains to execute in fips_mode, you must turn
58 on the fips_mode boolean. Enabled by default.
59 setsebool -P fips_mode 1
61 If you want to allow system to run with NIS, you must turn on the
65 nis_enabled boolean. Disabled by default.
66 setsebool -P nis_enabled 1
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72 The SELinux process type alsa_t can manage files labeled with the fol‐
73 lowing file types. The paths listed are the default paths for these
74 file types. Note the processes UID still need to have DAC permissions.
75 alsa_etc_rw_t
77 /etc/asound(/.*)?
79 /etc/alsa/pcm(/.*)?
80 /usr/share/alsa/pcm(/.*)?
81 /etc/asound.state
82 /etc/alsa/asound.state
83 /usr/share/alsa/alsa.conf
84 alsa_lock_t
86 /var/lock/asound.state.lock
88 alsa_tmpfs_t
90 alsa_var_lib_t
93 /var/lib/alsa(/.*)?
95 alsa_var_run_t
97 /var/run/alsactl.pid
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102 SELinux requires files to have an extended attribute to define the file
103 type.
104 You can see the context of a file using the -Z option to ls
106 Policy governs the access confined processes have to these files.
108 SELinux alsa policy is very flexible allowing users to setup their alsa
109 processes in as secure a method as possible.
110 STANDARD FILE CONTEXT
112 SELinux defines the file context types for the alsa, if you wanted to
114 store files with these types in a diffent paths, you need to execute
115 the semanage command to sepecify alternate labeling and then use
116 restorecon to put the labels on disk.
117 semanage fcontext -a -t alsa_unit_file_t '/srv/myalsa_content(/.*)?'
119 restorecon -R -v /srv/myalsa_content
120 Note: SELinux often uses regular expressions to specify labels that
122 match multiple files.
123 The following file types are defined for alsa:
125 alsa_etc_rw_t
129 - Set files with the alsa_etc_rw_t type, if you want to treat the files
131 as alsa etc read/write content.
132 Paths:
135 /etc/asound(/.*)?, /etc/alsa/pcm(/.*)?, /usr/share/alsa/pcm(/.*)?,
136 /etc/asound.state, /etc/alsa/asound.state,
137 /usr/share/alsa/alsa.conf
138 alsa_exec_t
141 - Set files with the alsa_exec_t type, if you want to transition an
143 executable to the alsa_t domain.
144 Paths:
147 /sbin/salsa, /sbin/alsactl, /usr/bin/ainit, /bin/alsaunmute,
148 /usr/sbin/salsa, /usr/sbin/alsactl, /usr/bin/alsaunmute
149 alsa_home_t
152 - Set files with the alsa_home_t type, if you want to store alsa files
154 in the users home directory.
155 alsa_lock_t
159 - Set files with the alsa_lock_t type, if you want to treat the files
161 as alsa lock data, stored under the /var/lock directory
162 alsa_tmp_t
166 - Set files with the alsa_tmp_t type, if you want to store alsa tempo‐
168 rary files in the /tmp directories.
169 alsa_tmpfs_t
173 - Set files with the alsa_tmpfs_t type, if you want to store alsa files
175 on a tmpfs file system.
176 alsa_unit_file_t
180 - Set files with the alsa_unit_file_t type, if you want to treat the
182 files as alsa unit content.
183 alsa_var_lib_t
187 - Set files with the alsa_var_lib_t type, if you want to store the alsa
189 files under the /var/lib directory.
190 alsa_var_run_t
194 - Set files with the alsa_var_run_t type, if you want to store the alsa
196 files under the /run or /var/run directory.
197 Note: File context can be temporarily modified with the chcon command.
201 If you want to permanently change the file context you need to use the
202 semanage fcontext command. This will modify the SELinux labeling data‐
203 base. You will need to use restorecon to apply the labels.
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207 semanage fcontext can also be used to manipulate default file context
208 mappings.
209 semanage permissive can also be used to manipulate whether or not a
211 process type is permissive.
212 semanage module can also be used to enable/disable/install/remove pol‐
214 icy modules.
215 semanage boolean can also be used to manipulate the booleans
217 system-config-selinux is a GUI tool available to customize SELinux pol‐
220 icy settings.
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224 This manual page was auto-generated using sepolicy manpage .
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228 selinux(8), alsa(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
229 setsebool(8)
230alsa 21-03-26 alsa_selinux(8)