From: J. Bruce Fields <bfields@citi.umich.edu>
Date: Mon, 16 Mar 2009 22:34:20 +0000 (-0400)
Subject: nfsd: nfsd should drop CAP_MKNOD for non-root
X-Git-Tag: v2.6.29~22^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=76a67ec6fb79ff3570dcb5342142c16098299911;p=pandora-kernel.git

nfsd: nfsd should drop CAP_MKNOD for non-root

Since creating a device node is normally an operation requiring special
privilege, Igor Zhbanov points out that it is surprising (to say the
least) that a client can, for example, create a device node on a
filesystem exported with root_squash.

So, make sure CAP_MKNOD is among the capabilities dropped when an nfsd
thread handles a request from a non-root user.

Reported-by: Igor Zhbanov <izh1979@gmail.com>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
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