diff options
| author | Steve French <sfrench@us.ibm.com> | 2008-02-15 21:06:08 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2008-02-15 21:06:08 +0000 |
| commit | 0a3abcf75bf391fec4e32356ab5ddb8f5d2e6b41 (patch) | |
| tree | b80b1d344ec24cad28b057ef803cebac9434be01 /security/Kconfig | |
| parent | 70eff55d2d979cca700aa6906494f0c474f3f7ff (diff) | |
| parent | 101142c37be8e5af9b847860219217e6b958c739 (diff) | |
Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'security/Kconfig')
| -rw-r--r-- | security/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/security/Kconfig b/security/Kconfig index 25ffe1b9dc9..5dfc206748c 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -104,6 +104,24 @@ config SECURITY_ROOTPLUG If you are unsure how to answer this question, answer N. +config SECURITY_DEFAULT_MMAP_MIN_ADDR + int "Low address space to protect from user allocation" + depends on SECURITY + default 0 + help + This is the portion of low virtual memory which should be protected + from userspace allocation. Keeping a user from writing to low pages + can help reduce the impact of kernel NULL pointer bugs. + + For most users with lots of address space a value of 65536 is + reasonable and should cause no problems. Programs which use vm86 + functionality would either need additional permissions from either + the LSM or the capabilities module or have this protection disabled. + + This value can be changed after boot using the + /proc/sys/vm/mmap_min_addr tunable. + + source security/selinux/Kconfig source security/smack/Kconfig |