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Junxiao Bi 9e13f1f9de ocfs2: o2hb: fix double free bug 
This is a regression issue and caused the following kernel panic when do
ocfs2 multiple test.

  BUG: unable to handle kernel paging request at 00000002000800c0
  IP: [<ffffffff81192978>] kmem_cache_alloc+0x78/0x160
  PGD 7bbe5067 PUD 0
  Oops: 0000 [#1] SMP
  Modules linked in: ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi xen_kbdfront xen_netfront xen_fbfront xen_blkfront
  CPU: 2 PID: 4044 Comm: mpirun Not tainted 4.5.0-rc5-next-20160225 #1
  Hardware name: Xen HVM domU, BIOS 4.3.1OVM 05/14/2014
  task: ffff88007a521a80 ti: ffff88007aed0000 task.ti: ffff88007aed0000
  RIP: 0010:[<ffffffff81192978>]  [<ffffffff81192978>] kmem_cache_alloc+0x78/0x160
  RSP: 0018:ffff88007aed3a48  EFLAGS: 00010282
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000001991
  RDX: 0000000000001990 RSI: 00000000024000c0 RDI: 000000000001b330
  RBP: ffff88007aed3a98 R08: ffff88007d29b330 R09: 00000002000800c0
  R10: 0000000c51376d87 R11: ffff8800792cac38 R12: ffff88007cc30f00
  R13: 00000000024000c0 R14: ffffffff811b053f R15: ffff88007aed3ce7
  FS:  0000000000000000(0000) GS:ffff88007d280000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00000002000800c0 CR3: 000000007aeb2000 CR4: 00000000000406e0
  Call Trace:
    __d_alloc+0x2f/0x1a0
    d_alloc+0x17/0x80
    lookup_dcache+0x8a/0xc0
    path_openat+0x3c3/0x1210
    do_filp_open+0x80/0xe0
    do_sys_open+0x110/0x200
    SyS_open+0x19/0x20
    do_syscall_64+0x72/0x230
    entry_SYSCALL64_slow_path+0x25/0x25
  Code: 05 e6 77 e7 7e 4d 8b 08 49 8b 40 10 4d 85 c9 0f 84 dd 00 00 00 48 85 c0 0f 84 d4 00 00 00 49 63 44 24 20 49 8b 3c 24 48 8d 4a 01 <49> 8b 1c 01 4c 89 c8 65 48 0f c7 0f 0f 94 c0 3c 01 75 b6 49 63
  RIP   kmem_cache_alloc+0x78/0x160
  CR2: 00000002000800c0
  ---[ end trace 823969e602e4aaac ]---

Fixes: a4a1dfa4bb8b("ocfs2/cluster: fix memory leak in o2hb_region_release")
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2016-03-25 16:37:42 -07:00
..
Makefile ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
heartbeat.c ocfs2: o2hb: fix double free bug 2016-03-25 16:37:42 -07:00
heartbeat.h ocfs2: fix deadlock between o2hb thread and o2net_wq 2014-10-09 22:25:47 -04:00
masklog.c ocfs2: remove __mlog_cpu_guess 2015-06-24 17:49:39 -07:00
masklog.h ocfs2: reduce object size of mlog uses 2015-06-24 17:49:39 -07:00
netdebug.c fs/ocfs2/cluster/netdebug.c: use seq_open_private() not seq_open() 2014-10-09 22:25:47 -04:00
nodemanager.c configfs: switch ->default groups to a linked list 2016-03-06 16:11:24 +01:00
nodemanager.h ocfs2/cluster: Make fence method configurable - v2 2009-12-02 16:49:26 -08:00
ocfs2_heartbeat.h
…
ocfs2_nodemanager.h ocfs2/dlm: Add message DLM_QUERY_REGION 2010-10-09 10:26:23 -07:00
quorum.c ocfs2: quorum: add a log for node not fenced 2014-08-29 16:28:17 -07:00
quorum.h
…
sys.c VERIFY_OCTAL_PERMISSIONS: stricter checking for sysfs perms. 2014-03-24 12:21:00 +10:30
sys.h
…
tcp.c ocfs2: o2net: should remove debugfs in o2net_init() out branch 2015-06-24 17:49:39 -07:00
tcp.h ocfs2: o2net: set tcp user timeout to max value 2014-08-29 16:28:16 -07:00
tcp_internal.h ocfs2: fix wrong comment 2015-02-10 14:30:28 -08:00