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authorGuoqing Jiang <gqjiang@suse.com>2017-05-16 14:01:25 +0800
committerShaohua Li <shli@fb.com>2017-05-21 20:37:09 -0700
commit2dffdc0724004f38f5e39907747b53e4b0d80e59 (patch)
treef45ab141f5ca4b9f9ce3b8758393937e99a82597 /drivers/md/md-cluster.c
parent08332893e37af6ae779367e78e444f8f9571511d (diff)
md-cluster: fix potential lock issue in add_new_disk
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>
Diffstat (limited to 'drivers/md/md-cluster.c')
-rw-r--r--drivers/md/md-cluster.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 7299ce2f08a8..03082e17c65c 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -1311,8 +1311,10 @@ static int add_new_disk(struct mddev *mddev, struct md_rdev *rdev)
cmsg.raid_slot = cpu_to_le32(rdev->desc_nr);
lock_comm(cinfo, 1);
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;