diff options
Diffstat (limited to 'security/Kconfig')
| -rw-r--r-- | security/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/security/Kconfig b/security/Kconfig index da10d9b573a4..2dfc0ce4083e 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -147,6 +147,17 @@ config HARDENED_USERCOPY or are part of the kernel text. This kills entire classes of heap overflow exploits and similar kernel memory exposures. +config HARDENED_USERCOPY_PAGESPAN + bool "Refuse to copy allocations that span multiple pages" + depends on HARDENED_USERCOPY + depends on !COMPILE_TEST + help + When a multi-page allocation is done without __GFP_COMP, + hardened usercopy will reject attempts to copy it. There are, + however, several cases of this in the kernel that have not all + been removed. This config is intended to be used only while + trying to find such users. + source security/selinux/Kconfig source security/smack/Kconfig source security/tomoyo/Kconfig |