From: Sage Weil <sage@newdream.net>
Date: Tue, 26 Jul 2011 18:30:29 +0000 (-0700)
Subject: ceph: protect access to d_parent
X-Git-Tag: v3.1-rc1~220^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f21c96dd5c615341963036ae8f5e4f5227a818d;p=pandora-kernel.git

ceph: protect access to d_parent

d_parent is protected by d_lock: use it when looking up a dentry's parent
directory inode.  Also take a reference and drop it in the caller to avoid
a use-after-free.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
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