Security: allow capable check to permit mmap or low vm space

[linux.git] / security / Kconfig

diff --git a/security/Kconfig b/security/Kconfig
index 34f593410d57cb12070a154bc0fa0b272467dfeb..8086e61058e373e68054dd166be2e942f4db2e4c 100644 (file)
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -22,16 +22,22 @@ config KEYS
          If you are unsure as to whether this is required, answer N.
 
 config KEYS_DEBUG_PROC_KEYS
-       bool "Enable the /proc/keys file by which all keys may be viewed"
+       bool "Enable the /proc/keys file by which keys may be viewed"
        depends on KEYS
        help
-         This option turns on support for the /proc/keys file through which
-         all the keys on the system can be listed.
+         This option turns on support for the /proc/keys file - through which
+         can be listed all the keys on the system that are viewable by the
+         reading process.
 
-         This option is a slight security risk in that it makes it possible
-         for anyone to see all the keys on the system. Normally the manager
-         pretends keys that are inaccessible to a process don't exist as far
-         as that process is concerned.
+         The only keys included in the list are those that grant View
+         permission to the reading process whether or not it possesses them.
+         Note that LSM security checks are still performed, and may further
+         filter out keys that the current process is not authorised to view.
+
+         Only key attributes are listed here; key payloads are not included in
+         the resulting table.
+
+         If you are unsure as to whether this is required, answer N.
 
 config SECURITY
        bool "Enable different security models"
@@ -68,15 +74,25 @@ config SECURITY_NETWORK_XFRM
          If you are unsure how to answer this question, answer N.
 
 config SECURITY_CAPABILITIES
-       tristate "Default Linux Capabilities"
+       bool "Default Linux Capabilities"
        depends on SECURITY
        help
          This enables the "default" Linux capabilities functionality.
          If you are unsure how to answer this question, answer Y.
 
+config SECURITY_FILE_CAPABILITIES
+       bool "File POSIX Capabilities (EXPERIMENTAL)"
+       depends on (SECURITY=n || SECURITY_CAPABILITIES!=n) && EXPERIMENTAL
+       default n
+       help
+         This enables filesystem capabilities, allowing you to give
+         binaries a subset of root's powers without using setuid 0.
+
+         If in doubt, answer N.
+
 config SECURITY_ROOTPLUG
-       tristate "Root Plug Support"
-       depends on USB && SECURITY
+       bool "Root Plug Support"
+       depends on USB=y && SECURITY
        help
          This is a sample LSM module that should only be used as such.
          It prevents any programs running with egid == 0 if a specific
@@ -87,18 +103,6 @@ config SECURITY_ROOTPLUG
          
          If you are unsure how to answer this question, answer N.
 
-config SECURITY_SECLVL
-       tristate "BSD Secure Levels"
-       depends on SECURITY
-       select CRYPTO
-       select CRYPTO_SHA1
-       help
-         Implements BSD Secure Levels as an LSM.  See
-         <file:Documentation/seclvl.txt> for instructions on how to use this
-         module.
-
-         If you are unsure how to answer this question, answer N.
-
 source security/selinux/Kconfig
 
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