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drbd: Fix rcu_read_lock balance on error path 

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Andreas Gruenbacher 2013-06-25 16:50:05 +02:00 committed by Jens Axboe
parent 6110d70bdf
commit f9eb7bf424
1 changed files with 12 additions and 7 deletions
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19
drivers/block/drbd/drbd_nl.c
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@ -2658,7 +2658,6 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
const struct sib_info *sib)
{
struct state_info *si = NULL; /* for sizeof(si->member); */
struct net_conf *nc;
struct nlattr *nla;
int got_ldev;
int err = 0;
@ -2688,13 +2687,19 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
goto nla_put_failure;
rcu_read_lock();
if (got_ldev)
if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive))
goto nla_put_failure;
if (got_ldev) {
struct disk_conf *disk_conf;
nc = rcu_dereference(mdev->tconn->net_conf);
if (nc)
err = net_conf_to_skb(skb, nc, exclude_sensitive);
disk_conf = rcu_dereference(mdev->ldev->disk_conf);
err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive);
}
if (!err) {
struct net_conf *nc;
nc = rcu_dereference(mdev->tconn->net_conf);
if (nc)
err = net_conf_to_skb(skb, nc, exclude_sensitive);
}
rcu_read_unlock();
if (err)
goto nla_put_failure;