From: Andreas Dilger <adilger@dilger.ca>
Date: Mon, 28 May 2012 21:02:25 +0000 (-0400)
Subject: ext4: disallow hard-linked directory in ext4_lookup
X-Git-Tag: v3.5-rc1~16^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e936b737211e6b54e34b71a827e56b872e958d8;p=pandora-kernel.git

ext4: disallow hard-linked directory in ext4_lookup

A hard-linked directory to its parent can cause the VFS to deadlock,
and is a sign of a corrupted file system.  So detect this case in
ext4_lookup(), before the rmdir() lockup scenario can take place.

Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
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