diff options
| author | Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> | 2014-04-09 17:00:30 +0900 |
|---|---|---|
| committer | Show Liu <show.liu@linaro.org> | 2014-06-18 12:03:48 +0800 |
| commit | 1043a38790cdcd17d35c1e1c4740b17b72713ed2 (patch) | |
| tree | 02e8d96ea41e65dd3d6c860aa5619ef8fda08c2c /net/bridge/br_vlan.c | |
| parent | 02378b76c597987142c42ce0730df730c8943572 (diff) | |
bridge: Fix double free and memory leak around br_allowed_ingress
[ Upstream commit eb7076182d1ae4bc4641534134ed707100d76acc ]
br_allowed_ingress() has two problems.
1. If br_allowed_ingress() is called by br_handle_frame_finish() and
vlan_untag() in br_allowed_ingress() fails, skb will be freed by both
vlan_untag() and br_handle_frame_finish().
2. If br_allowed_ingress() is called by br_dev_xmit() and
br_allowed_ingress() fails, the skb will not be freed.
Fix these two problems by freeing the skb in br_allowed_ingress()
if it fails.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bridge/br_vlan.c')
| -rw-r--r-- | net/bridge/br_vlan.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index f23c74b3a95..ba7757b7737 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -170,7 +170,7 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, * rejected. */ if (!v) - return false; + goto drop; /* If vlan tx offload is disabled on bridge device and frame was * sent from vlan device on the bridge device, it does not have @@ -193,7 +193,7 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, * vlan untagged or priority-tagged traffic belongs to. */ if (pvid == VLAN_N_VID) - return false; + goto drop; /* PVID is set on this port. Any untagged or priority-tagged * ingress frame is considered to belong to this vlan. @@ -216,7 +216,8 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, /* Frame had a valid vlan tag. See if vlan is allowed */ if (test_bit(*vid, v->vlan_bitmap)) return true; - +drop: + kfree_skb(skb); return false; } |