dmesg_selinux(8)					       SELinux Policy dmesg						  dmesg_selinux(8)

NAME

       dmesg_selinux - Security Enhanced Linux Policy for the dmesg processes

DESCRIPTION

       Security-Enhanced Linux secures the dmesg processes via flexible mandatory access control.

       The  dmesg  processes  execute with the dmesg_t SELinux type. You can check if you have these processes running by executing the ps command
       with the -Z qualifier.

       For example:

       ps -eZ | grep dmesg_t

ENTRYPOINTS

       The dmesg_t SELinux type can be entered via the dmesg_exec_t file type.

       The default entrypoint paths for the dmesg_t domain are the following:

       /bin/dmesg, /usr/bin/dmesg

PROCESS TYPES

       SELinux defines process types (domains) for each process running on the system

       You can see the context of a process using the -Z option to ps

       Policy governs the access confined processes have to files.  SELinux dmesg policy is very flexible allowing users to setup their dmesg pro-
       cesses in as secure a method as possible.

       The following process types are defined for dmesg:

       dmesg_t

       Note:  semanage	permissive  -a dmesg_t can be used to make the process type dmesg_t permissive. SELinux does not deny access to permissive
       process types, but the AVC (SELinux denials) messages are still generated.

BOOLEANS

       SELinux policy is customizable based on least access required.  dmesg policy is extremely flexible and has several booleans that allow  you
       to manipulate the policy and run dmesg with the tightest access possible.

       If you want to allow all daemons the ability to read/write terminals, you must turn on the daemons_use_tty boolean. Disabled by default.

       setsebool -P daemons_use_tty 1

       If  you	want  to  deny	any  process  from ptracing or debugging any other processes, you must turn on the deny_ptrace boolean. Enabled by
       default.

       setsebool -P deny_ptrace 1

       If you want to allow all domains to use other domains file descriptors, you must turn on the domain_fd_use boolean. Enabled by default.

       setsebool -P domain_fd_use 1

       If you want to allow all domains to have the kernel load modules, you must turn on  the	domain_kernel_load_modules  boolean.  Disabled	by
       default.

       setsebool -P domain_kernel_load_modules 1

       If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

       setsebool -P fips_mode 1

       If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

       setsebool -P global_ssp 1

MANAGED FILES

       The  SELinux process type dmesg_t can manage files labeled with the following file types.  The paths listed are the default paths for these
       file types.  Note the processes UID still need to have DAC permissions.

       var_log_t

	    /var/log/.*
	    /nsr/logs(/.*)?
	    /var/webmin(/.*)?
	    /var/log/secure[^/]*
	    /opt/zimbra/log(/.*)?
	    /var/log/maillog[^/]*
	    /var/log/spooler[^/]*
	    /var/log/messages[^/]*
	    /usr/centreon/log(/.*)?
	    /var/spool/rsyslog(/.*)?
	    /var/axfrdns/log/main(/.*)?
	    /var/spool/bacula/log(/.*)?
	    /var/tinydns/log/main(/.*)?
	    /var/dnscache/log/main(/.*)?
	    /var/stockmaniac/templates_cache(/.*)?
	    /opt/Symantec/scspagent/IDS/system(/.*)?
	    /var/log
	    /var/log/dmesg
	    /var/log/syslog
	    /var/named/chroot/var/log

FILE CONTEXTS

       SELinux requires files to have an extended attribute to define the file type.

       You can see the context of a file using the -Z option to ls

       Policy governs the access confined processes have to these files.  SELinux dmesg policy is very flexible  allowing  users  to  setup  their
       dmesg processes in as secure a method as possible.

       STANDARD FILE CONTEXT

       SELinux defines the file context types for the dmesg, if you wanted to store files with these types in a diffent paths, you need to execute
       the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

       semanage fcontext -a -t dmesg_exec_t '/srv/dmesg/content(/.*)?'
       restorecon -R -v /srv/mydmesg_content

       Note: SELinux often uses regular expressions to specify labels that match multiple files.

       The following file types are defined for dmesg:

       dmesg_exec_t

       - Set files with the dmesg_exec_t type, if you want to transition an executable to the dmesg_t domain.

       Paths:
	    /bin/dmesg, /usr/bin/dmesg

       Note: File context can be temporarily modified with the chcon command.  If you want to permanently change the file context you need to  use
       the semanage fcontext command.  This will modify the SELinux labeling database.	You will need to use restorecon to apply the labels.

COMMANDS

       semanage fcontext can also be used to manipulate default file context mappings.

       semanage permissive can also be used to manipulate whether or not a process type is permissive.

       semanage module can also be used to enable/disable/install/remove policy modules.

       semanage boolean can also be used to manipulate the booleans

       system-config-selinux is a GUI tool available to customize SELinux policy settings.

AUTHOR

       This manual page was auto-generated using sepolicy manpage .

SEE ALSO

       selinux(8), dmesg(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) , setsebool(8)

dmesg								     14-06-10							  dmesg_selinux(8)