From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 18 Apr 2009 06:32:31 +0000 (-0400)
Subject: Safer nfsd_cross_mnt()
X-Git-Tag: v2.6.30-rc3~35^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1644ccc8a99ae73859c39372f96afdbf03c9f80d;p=pandora-kernel.git

Safer nfsd_cross_mnt()

AFAICS, we have a subtle bug there: if we have crossed mountpoint
*and* it got mount --move'd away, we'll be holding only one
reference to fs containing dentry - exp->ex_path.mnt.  IOW, we
ought to dput() before exp_put().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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