diff options
| -rw-r--r-- | net/ax25/af_ax25.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c index ecb14ee00498..b4725ff317c0 100644 --- a/net/ax25/af_ax25.c +++ b/net/ax25/af_ax25.c @@ -87,10 +87,22 @@ static void ax25_kill_by_device(struct net_device *dev) return; spin_lock_bh(&ax25_list_lock); +again: ax25_for_each(s, node, &ax25_list) { if (s->ax25_dev == ax25_dev) { s->ax25_dev = NULL; + spin_unlock_bh(&ax25_list_lock); ax25_disconnect(s, ENETUNREACH); + spin_lock_bh(&ax25_list_lock); + + /* The entry could have been deleted from the + * list meanwhile and thus the next pointer is + * no longer valid. Play it safe and restart + * the scan. Forward progress is ensured + * because we set s->ax25_dev to NULL and we + * are never passed a NULL 'dev' argument. + */ + goto again; } } spin_unlock_bh(&ax25_list_lock); |