From: Kees Cook <kees.cook@canonical.com>
Date: Sun, 8 Nov 2009 17:37:00 +0000 (-0800)
Subject: sysctl: require CAP_SYS_RAWIO to set mmap_min_addr
X-Git-Tag: v2.6.33-rc1~411^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e1a6ef2dea88101b056b6d9984f3325c5efced3;p=pandora-kernel.git

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>
---

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