From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 12 Dec 2011 15:53:02 +0000 (-0500)
Subject: ext4: fix ext4_end_io_dio() racing against fsync()
X-Git-Tag: v3.2-rc6~16^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5a7e97039a80fae673ccc115ce595d5b88fb4ee;p=pandora-kernel.git

ext4: fix ext4_end_io_dio() racing against fsync()

We need to make sure iocb->private is cleared *before* we put the
io_end structure on i_completed_io_list.  Otherwise fsync() could
potentially run on another CPU and free the iocb structure out from
under us.

Reported-by: Kent Overstreet <koverstreet@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
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