diff options
| author | Jiri Pirko <jiri@resnulli.us> | 2013-06-08 15:00:53 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-12 00:56:27 -0700 |
| commit | 76c455decbbad31de21c727edb184a963f42b40b (patch) | |
| tree | f62b5479531b2eec3323f0e8b71ed475c19fc5a1 | |
| parent | 19a6afb23e5d323e1245baa4e62755492b2f1200 (diff) | |
team: check return value of team_get_port_by_index_rcu() for NULL
team_get_port_by_index_rcu() might return NULL due to race between port
removal and skb tx path. Panic is easily triggeable when txing packets
and adding/removing port in a loop.
introduced by commit 3d249d4ca "net: introduce ethernet teaming device"
and commit 753f993911b "team: introduce random mode" (for random mode)
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/team/team_mode_random.c | 2 | ||||
| -rw-r--r-- | drivers/net/team/team_mode_roundrobin.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/team/team_mode_random.c b/drivers/net/team/team_mode_random.c index 5ca14d463ba..7f032e21134 100644 --- a/drivers/net/team/team_mode_random.c +++ b/drivers/net/team/team_mode_random.c @@ -28,6 +28,8 @@ static bool rnd_transmit(struct team *team, struct sk_buff *skb) port_index = random_N(team->en_port_count); port = team_get_port_by_index_rcu(team, port_index); + if (unlikely(!port)) + goto drop; port = team_get_first_port_txable_rcu(team, port); if (unlikely(!port)) goto drop; diff --git a/drivers/net/team/team_mode_roundrobin.c b/drivers/net/team/team_mode_roundrobin.c index d268e4de781..472623f8ce3 100644 --- a/drivers/net/team/team_mode_roundrobin.c +++ b/drivers/net/team/team_mode_roundrobin.c @@ -32,6 +32,8 @@ static bool rr_transmit(struct team *team, struct sk_buff *skb) port_index = rr_priv(team)->sent_packets++ % team->en_port_count; port = team_get_port_by_index_rcu(team, port_index); + if (unlikely(!port)) + goto drop; port = team_get_first_port_txable_rcu(team, port); if (unlikely(!port)) goto drop; |