diff options
| author | Guoqing Jiang <gqjiang@suse.com> | 2017-05-16 14:01:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:48:03 +0200 |
| commit | 03858f5f7ad86a1b8332e4a3329b7757c34da30c (patch) | |
| tree | 4f9c80fa05393dcc5b3baa8ad13311bbf04b348a /drivers/md | |
| parent | a90e0450d203c8f13f966e62638f146b46b977f8 (diff) | |
md-cluster: fix potential lock issue in add_new_disk
[ Upstream commit 2dffdc0724004f38f5e39907747b53e4b0d80e59 ]
The add_new_disk returns with communication locked if
__sendmsg returns failure, fix it with call unlock_comm
before return.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
CC: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md-cluster.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c index ba7edcdd09ce..fcc2b5746a9f 100644 --- a/drivers/md/md-cluster.c +++ b/drivers/md/md-cluster.c @@ -1122,8 +1122,10 @@ static int add_new_disk(struct mddev *mddev, struct md_rdev *rdev) cmsg.raid_slot = cpu_to_le32(rdev->desc_nr); lock_comm(cinfo); ret = __sendmsg(cinfo, &cmsg); - if (ret) + if (ret) { + unlock_comm(cinfo); return ret; + } cinfo->no_new_dev_lockres->flags |= DLM_LKF_NOQUEUE; ret = dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_EX); cinfo->no_new_dev_lockres->flags &= ~DLM_LKF_NOQUEUE; |