diff options
| author | Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> | 2014-04-09 17:00:30 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-30 21:52:14 -0700 |
| commit | 4902599654b2e606529241d06c5748c48ed6dc87 (patch) | |
| tree | d2acff003153a14c75a0064d4e64c3424d4c2bf8 /net | |
| parent | 91ce31b21cfd51be269746b72ae4db8ced8b6799 (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')
| -rw-r--r-- | net/bridge/br_input.c | 2 | ||||
| -rw-r--r-- | net/bridge/br_vlan.c | 7 |
2 files changed, 5 insertions, 4 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 828e2bcc1f52..0a3bc82782cf 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -71,7 +71,7 @@ int br_handle_frame_finish(struct sk_buff *skb) goto drop; if (!br_allowed_ingress(p->br, nbp_get_vlan_info(p), skb, &vid)) - goto drop; + goto out; /* insert into forwarding database after filtering to avoid spoofing */ br = p->br; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 9a9ffe7e4019..d8deb8bda736 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -202,7 +202,7 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, * rejected. */ if (!v) - return false; + goto drop; if (br_vlan_get_tag(skb, vid)) { u16 pvid = br_get_pvid(v); @@ -212,7 +212,7 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, * traffic belongs to. */ if (pvid == VLAN_N_VID) - return false; + goto drop; /* PVID is set on this port. Any untagged ingress * frame is considered to belong to this vlan. @@ -224,7 +224,8 @@ 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; } |