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.
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12 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.
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16 For example:
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18 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.
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25 The default entrypoint paths for the alsa_t domain are the following:
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27 /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
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34 You can see the context of a process using the -Z option to ps
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36 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.
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40 The following process types are defined for alsa:
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42 alsa_t
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44 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.
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57 If you want to allow all domains to execute in fips_mode, you must turn
58 on the fips_mode boolean. Enabled by default.
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60 setsebool -P fips_mode 1
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64 If you want to allow system to run with NIS, you must turn on the
65 nis_enabled boolean. Disabled by default.
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67 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.
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76 alsa_etc_rw_t
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78 /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
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85 alsa_lock_t
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87 /var/lock/asound.state.lock
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89 alsa_tmp_t
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92 alsa_tmpfs_t
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95 alsa_var_lib_t
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97 /var/lib/alsa(/.*)?
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99 alsa_var_run_t
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101 /var/run/alsactl.pid
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103 krb5_host_rcache_t
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105 /var/tmp/krb5_0.rcache2
106 /var/cache/krb5rcache(/.*)?
107 /var/tmp/nfs_0
108 /var/tmp/DNS_25
109 /var/tmp/host_0
110 /var/tmp/imap_0
111 /var/tmp/HTTP_23
112 /var/tmp/HTTP_48
113 /var/tmp/ldap_55
114 /var/tmp/ldap_487
115 /var/tmp/ldapmap1_0
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119 SELinux requires files to have an extended attribute to define the file
120 type.
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122 You can see the context of a file using the -Z option to ls
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124 Policy governs the access confined processes have to these files.
125 SELinux alsa policy is very flexible allowing users to setup their alsa
126 processes in as secure a method as possible.
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128 STANDARD FILE CONTEXT
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130 SELinux defines the file context types for the alsa, if you wanted to
131 store files with these types in a diffent paths, you need to execute
132 the semanage command to specify alternate labeling and then use re‐
133 storecon to put the labels on disk.
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135 semanage fcontext -a -t alsa_unit_file_t '/srv/myalsa_content(/.*)?'
136 restorecon -R -v /srv/myalsa_content
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138 Note: SELinux often uses regular expressions to specify labels that
139 match multiple files.
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141 The following file types are defined for alsa:
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145 alsa_etc_rw_t
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147 - Set files with the alsa_etc_rw_t type, if you want to treat the files
148 as alsa etc read/write content.
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151 Paths:
152 /etc/asound(/.*)?, /etc/alsa/pcm(/.*)?, /usr/share/alsa/pcm(/.*)?,
153 /etc/asound.state, /etc/alsa/asound.state,
154 /usr/share/alsa/alsa.conf
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157 alsa_exec_t
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159 - Set files with the alsa_exec_t type, if you want to transition an ex‐
160 ecutable to the alsa_t domain.
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163 Paths:
164 /sbin/salsa, /sbin/alsactl, /usr/bin/ainit, /bin/alsaunmute,
165 /usr/sbin/salsa, /usr/sbin/alsactl, /usr/bin/alsaunmute
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168 alsa_home_t
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170 - Set files with the alsa_home_t type, if you want to store alsa files
171 in the users home directory.
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175 alsa_lock_t
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177 - Set files with the alsa_lock_t type, if you want to treat the files
178 as alsa lock data, stored under the /var/lock directory
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182 alsa_tmp_t
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184 - Set files with the alsa_tmp_t type, if you want to store alsa tempo‐
185 rary files in the /tmp directories.
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189 alsa_tmpfs_t
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191 - Set files with the alsa_tmpfs_t type, if you want to store alsa files
192 on a tmpfs file system.
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196 alsa_unit_file_t
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198 - Set files with the alsa_unit_file_t type, if you want to treat the
199 files as alsa unit content.
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203 alsa_var_lib_t
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205 - Set files with the alsa_var_lib_t type, if you want to store the alsa
206 files under the /var/lib directory.
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210 alsa_var_run_t
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212 - Set files with the alsa_var_run_t type, if you want to store the alsa
213 files under the /run or /var/run directory.
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217 Note: File context can be temporarily modified with the chcon command.
218 If you want to permanently change the file context you need to use the
219 semanage fcontext command. This will modify the SELinux labeling data‐
220 base. You will need to use restorecon to apply the labels.
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224 semanage fcontext can also be used to manipulate default file context
225 mappings.
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227 semanage permissive can also be used to manipulate whether or not a
228 process type is permissive.
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230 semanage module can also be used to enable/disable/install/remove pol‐
231 icy modules.
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233 semanage boolean can also be used to manipulate the booleans
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236 system-config-selinux is a GUI tool available to customize SELinux pol‐
237 icy settings.
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241 This manual page was auto-generated using sepolicy manpage .
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245 selinux(8), alsa(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
246 setsebool(8)
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250alsa 21-11-19 alsa_selinux(8)