tree bef312c242dd472ca00f0dc8bcebee4f094a85e3
parent 31bde71c202722a76686c3cf69a254c8a912275a
author Kees Cook <kees.cook@canonical.com> 1257701820 -0800
committer James Morris <jmorris@namei.org> 1257716062 +1100

sysctl: require CAP_SYS_RAWIO to set mmap_min_addr

Currently the mmap_min_addr value can only be bypassed during mmap when
the task has CAP_SYS_RAWIO.  However, the mmap_min_addr sysctl value itself
can be adjusted to 0 if euid == 0, allowing a bypass without CAP_SYS_RAWIO.
This patch adds a check for the capability before allowing mmap_min_addr to
be changed.

Signed-off-by: Kees Cook <kees.cook@canonical.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>