From: Nick Piggin <npiggin@kernel.dk>
Date: Fri, 14 Jan 2011 02:36:19 +0000 (+0000)
Subject: fs: fix dropping of rcu-walk from force_reval_path
X-Git-Tag: v2.6.38-rc1~71^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=90dbb77ba48dddb87445d238e84cd137cf97dd98;p=pandora-kernel.git

fs: fix dropping of rcu-walk from force_reval_path

As J. R. Okajima noted, force_reval_path passes in the same dentry to
d_revalidate as the one in the nameidata structure (other callers pass in a
child), so the locking breaks. This can oops with a chrooted nfs mount, for
example. Similarly there can be other problems with revalidating a dentry
which is already in nameidata of the path walk.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
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