1systemd_coredump_selinux(S8E)Linux Policy systemd_coredsuymsptemd_coredump_selinux(8)
2
6 systemd_coredump_selinux - Security Enhanced Linux Policy for the sys‐
7 temd_coredump processes
8
10 Security-Enhanced Linux secures the systemd_coredump processes via
11 flexible mandatory access control.
12 The systemd_coredump processes execute with the systemd_coredump_t
14 SELinux type. You can check if you have these processes running by exe‐
15 cuting the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep systemd_coredump_t
20
24 The systemd_coredump_t SELinux type can be entered via the sys‐
25 temd_coredump_exec_t file type.
26 The default entrypoint paths for the systemd_coredump_t domain are the
28 following:
29 /bin/systemd-coredump, /usr/lib/systemd/systemd-coredump
31
33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 systemd_coredump policy is very flexible allowing users to setup their
40 systemd_coredump processes in as secure a method as possible.
41 The following process types are defined for systemd_coredump:
43 systemd_coredump_t
45 Note: semanage permissive -a systemd_coredump_t can be used to make the
47 process type systemd_coredump_t permissive. SELinux does not deny
48 access to permissive process types, but the AVC (SELinux denials) mes‐
49 sages are still generated.
50
53 SELinux policy is customizable based on least access required. sys‐
54 temd_coredump policy is extremely flexible and has several booleans
55 that allow you to manipulate the policy and run systemd_coredump with
56 the tightest access possible.
57 If you want to deny user domains applications to map a memory region as
61 both executable and writable, this is dangerous and the executable
62 should be reported in bugzilla, you must turn on the deny_execmem bool‐
63 ean. Enabled by default.
64 setsebool -P deny_execmem 1
66 If you want to control the ability to mmap a low area of the address
70 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
71 the mmap_low_allowed boolean. Disabled by default.
72 setsebool -P mmap_low_allowed 1
74 If you want to disable kernel module loading, you must turn on the
78 secure_mode_insmod boolean. Enabled by default.
79 setsebool -P secure_mode_insmod 1
81 If you want to allow unconfined executables to make their heap memory
85 executable. Doing this is a really bad idea. Probably indicates a
86 badly coded executable, but could indicate an attack. This executable
87 should be reported in bugzilla, you must turn on the selin‐
88 uxuser_execheap boolean. Disabled by default.
89 setsebool -P selinuxuser_execheap 1
91 If you want to allow unconfined executables to make their stack exe‐
95 cutable. This should never, ever be necessary. Probably indicates a
96 badly coded executable, but could indicate an attack. This executable
97 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
98 stack boolean. Disabled by default.
99 setsebool -P selinuxuser_execstack 1
101
105 The SELinux process type systemd_coredump_t can manage files labeled
106 with the following file types. The paths listed are the default paths
107 for these file types. Note the processes UID still need to have DAC
108 permissions.
109 file_type
111 all files on the system
113
116 SELinux requires files to have an extended attribute to define the file
117 type.
118 You can see the context of a file using the -Z option to ls
120 Policy governs the access confined processes have to these files.
122 SELinux systemd_coredump policy is very flexible allowing users to set‐
123 up their systemd_coredump processes in as secure a method as possible.
124 STANDARD FILE CONTEXT
126 SELinux defines the file context types for the systemd_coredump, if you
128 wanted to store files with these types in a diffent paths, you need to
129 execute the semanage command to sepecify alternate labeling and then
130 use restorecon to put the labels on disk.
131 semanage fcontext -a -t systemd_coredump_tmpfs_t '/srv/mysystemd_core‐
133 dump_content(/.*)?'
134 restorecon -R -v /srv/mysystemd_coredump_content
135 Note: SELinux often uses regular expressions to specify labels that
137 match multiple files.
138 The following file types are defined for systemd_coredump:
140 systemd_coredump_exec_t
144 - Set files with the systemd_coredump_exec_t type, if you want to tran‐
146 sition an executable to the systemd_coredump_t domain.
147 Paths:
150 /bin/systemd-coredump, /usr/lib/systemd/systemd-coredump
151 systemd_coredump_tmpfs_t
154 - Set files with the systemd_coredump_tmpfs_t type, if you want to
156 store systemd coredump files on a tmpfs file system.
157 Note: File context can be temporarily modified with the chcon command.
161 If you want to permanently change the file context you need to use the
162 semanage fcontext command. This will modify the SELinux labeling data‐
163 base. You will need to use restorecon to apply the labels.
164
167 semanage fcontext can also be used to manipulate default file context
168 mappings.
169 semanage permissive can also be used to manipulate whether or not a
171 process type is permissive.
172 semanage module can also be used to enable/disable/install/remove pol‐
174 icy modules.
175 semanage boolean can also be used to manipulate the booleans
177 system-config-selinux is a GUI tool available to customize SELinux pol‐
180 icy settings.
181
184 This manual page was auto-generated using sepolicy manpage .
185
188 selinux(8), systemd_coredump(8), semanage(8), restorecon(8), chcon(1),
189 sepolicy(8), setsebool(8)
190systemd_coredump 20-05-05 systemd_coredump_selinux(8)