summaryrefslogtreecommitdiffstats
path: root/kernel/Documentation/security/Smack.txt
diff options
context:
space:
mode:
authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/Documentation/security/Smack.txt
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/Documentation/security/Smack.txt')
-rw-r--r--kernel/Documentation/security/Smack.txt45
1 files changed, 40 insertions, 5 deletions
diff --git a/kernel/Documentation/security/Smack.txt b/kernel/Documentation/security/Smack.txt
index abc82f852..945cc633d 100644
--- a/kernel/Documentation/security/Smack.txt
+++ b/kernel/Documentation/security/Smack.txt
@@ -28,6 +28,10 @@ Smack kernels use the CIPSO IP option. Some network
configurations are intolerant of IP options and can impede
access to systems that use them as Smack does.
+Smack is used in the Tizen operating system. Please
+go to http://wiki.tizen.org for information about how
+Smack is used in Tizen.
+
The current git repository for Smack user space is:
git://github.com/smack-team/smack.git
@@ -108,6 +112,8 @@ in the smackfs filesystem. This pseudo-filesystem is mounted
on /sys/fs/smackfs.
access
+ Provided for backward compatibility. The access2 interface
+ is preferred and should be used instead.
This interface reports whether a subject with the specified
Smack label has a particular access to an object with a
specified Smack label. Write a fixed format access rule to
@@ -136,6 +142,8 @@ change-rule
those in the fourth string. If there is no such rule it will be
created using the access specified in the third and the fourth strings.
cipso
+ Provided for backward compatibility. The cipso2 interface
+ is preferred and should be used instead.
This interface allows a specific CIPSO header to be assigned
to a Smack label. The format accepted on write is:
"%24s%4d%4d"["%4d"]...
@@ -157,7 +165,19 @@ direct
doi
This contains the CIPSO domain of interpretation used in
network packets.
+ipv6host
+ This interface allows specific IPv6 internet addresses to be
+ treated as single label hosts. Packets are sent to single
+ label hosts only from processes that have Smack write access
+ to the host label. All packets received from single label hosts
+ are given the specified label. The format accepted on write is:
+ "%h:%h:%h:%h:%h:%h:%h:%h label" or
+ "%h:%h:%h:%h:%h:%h:%h:%h/%d label".
+ The "::" address shortcut is not supported.
+ If label is "-DELETE" a matched entry will be deleted.
load
+ Provided for backward compatibility. The load2 interface
+ is preferred and should be used instead.
This interface allows access control rules in addition to
the system defined rules to be specified. The format accepted
on write is:
@@ -181,6 +201,8 @@ load2
permissions that are not allowed. The string "r-x--" would
specify read and execute access.
load-self
+ Provided for backward compatibility. The load-self2 interface
+ is preferred and should be used instead.
This interface allows process specific access rules to be
defined. These rules are only consulted if access would
otherwise be permitted, and are intended to provide additional
@@ -205,12 +227,14 @@ netlabel
received from single label hosts are given the specified
label. The format accepted on write is:
"%d.%d.%d.%d label" or "%d.%d.%d.%d/%d label".
+ If the label specified is "-CIPSO" the address is treated
+ as a host that supports CIPSO headers.
onlycap
- This contains the label processes must have for CAP_MAC_ADMIN
+ This contains labels processes must have for CAP_MAC_ADMIN
and CAP_MAC_OVERRIDE to be effective. If this file is empty
these capabilities are effective at for processes with any
- label. The value is set by writing the desired label to the
- file or cleared by writing "-" to the file.
+ label. The values are set by writing the desired labels, separated
+ by spaces, to the file or cleared by writing "-" to the file.
ptrace
This is used to define the current ptrace policy
0 - default: this is the policy that relies on Smack access rules.
@@ -231,8 +255,19 @@ unconfined
the access permitted if it wouldn't be otherwise. Note that this
is dangerous and can ruin the proper labeling of your system.
It should never be used in production.
-
-You can add access rules in /etc/smack/accesses. They take the form:
+relabel-self
+ This interface contains a list of labels to which the process can
+ transition to, by writing to /proc/self/attr/current.
+ Normally a process can change its own label to any legal value, but only
+ if it has CAP_MAC_ADMIN. This interface allows a process without
+ CAP_MAC_ADMIN to relabel itself to one of labels from predefined list.
+ A process without CAP_MAC_ADMIN can change its label only once. When it
+ does, this list will be cleared.
+ The values are set by writing the desired labels, separated
+ by spaces, to the file or cleared by writing "-" to the file.
+
+If you are using the smackload utility
+you can add access rules in /etc/smack/accesses. They take the form:
subjectlabel objectlabel access