ocfs2: fix clusters leak in ocfs2_defrag_extent()
authorLarry Chen <lchen@suse.com>
Fri, 2 Nov 2018 22:48:27 +0000 (15:48 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 28 Nov 2019 17:28:53 +0000 (18:28 +0100)
commitbcb7267a915d800954e2412f44224a0b458329a8
tree187c3c9594c0b2c33f0d5a6cf8fa74c57fe14e9f
parent65cbd1279f4b999d56a838344a30642db24cd215
ocfs2: fix clusters leak in ocfs2_defrag_extent()

[ Upstream commit 6194ae4242dec0c9d604bc05df83aa9260a899e4 ]

ocfs2_defrag_extent() might leak allocated clusters.  When the file
system has insufficient space, the number of claimed clusters might be
less than the caller wants.  If that happens, the original code might
directly commit the transaction without returning clusters.

This patch is based on code in ocfs2_add_clusters_in_btree().

[akpm@linux-foundation.org: include localalloc.h, reduce scope of data_ac]
Link: http://lkml.kernel.org/r/20180904041621.16874-3-lchen@suse.com
Signed-off-by: Larry Chen <lchen@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
fs/ocfs2/move_extents.c