diff options
Diffstat (limited to 'security')
| -rw-r--r-- | security/Kconfig | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/security/Kconfig b/security/Kconfig index 118f4549404e..d900f47eaa68 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -158,6 +158,41 @@ config HARDENED_USERCOPY_PAGESPAN been removed. This config is intended to be used only while trying to find such users. +config STATIC_USERMODEHELPER + bool "Force all usermode helper calls through a single binary" + help + By default, the kernel can call many different userspace + binary programs through the "usermode helper" kernel + interface. Some of these binaries are statically defined + either in the kernel code itself, or as a kernel configuration + option. However, some of these are dynamically created at + runtime, or can be modified after the kernel has started up. + To provide an additional layer of security, route all of these + calls through a single executable that can not have its name + changed. + + Note, it is up to this single binary to then call the relevant + "real" usermode helper binary, based on the first argument + passed to it. If desired, this program can filter and pick + and choose what real programs are called. + + If you wish for all usermode helper programs are to be + disabled, choose this option and then set + STATIC_USERMODEHELPER_PATH to an empty string. + +config STATIC_USERMODEHELPER_PATH + string "Path to the static usermode helper binary" + depends on STATIC_USERMODEHELPER + default "/sbin/usermode-helper" + help + The binary called by the kernel when any usermode helper + program is wish to be run. The "real" application's name will + be in the first argument passed to this program on the command + line. + + If you wish for all usermode helper programs to be disabled, + specify an empty string here (i.e. ""). + source security/selinux/Kconfig source security/smack/Kconfig source security/tomoyo/Kconfig |