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| author | David S. Miller <davem@davemloft.net> | 2014-11-21 00:12:39 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-21 00:12:39 -0500 |
| commit | 7e09dccd07518729fe3cf586beb83acffa2e64ca (patch) | |
| tree | 2ef7558f6db8bd9fd7355d8194d1b5d871edf63f | |
| parent | c8577819009473311d5f74112e136f17d7859ee1 (diff) | |
| parent | f0b4eeced518c632210ef2aea44fc92cc9e86cce (diff) | |
| download | lwn-7e09dccd07518729fe3cf586beb83acffa2e64ca.tar.gz lwn-7e09dccd07518729fe3cf586beb83acffa2e64ca.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains two bugfixes for your net tree, they are:
1) Validate netlink group from nfnetlink to avoid an out of bound array
access. This should only happen with superuser priviledges though.
Discovered by Andrey Ryabinin using trinity.
2) Don't push ethernet header before calling the netfilter output hook
for multicast traffic, this breaks ebtables since it expects to see
skb->data pointing to the network header, patch from Linus Luessing.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/bridge/br_multicast.c | 3 | ||||
| -rw-r--r-- | net/netfilter/nfnetlink.c | 12 |
2 files changed, 12 insertions, 3 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 648d79ccf462..c465876c7861 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -813,10 +813,9 @@ static void __br_multicast_send_query(struct net_bridge *br, return; if (port) { - __skb_push(skb, sizeof(struct ethhdr)); skb->dev = port->dev; NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev, - dev_queue_xmit); + br_dev_queue_push_xmit); } else { br_multicast_select_own_querier(br, ip, skb); netif_rx(skb); diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index 6c5a915cfa75..13c2e17bbe27 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -47,6 +47,8 @@ static const int nfnl_group2type[NFNLGRP_MAX+1] = { [NFNLGRP_CONNTRACK_EXP_NEW] = NFNL_SUBSYS_CTNETLINK_EXP, [NFNLGRP_CONNTRACK_EXP_UPDATE] = NFNL_SUBSYS_CTNETLINK_EXP, [NFNLGRP_CONNTRACK_EXP_DESTROY] = NFNL_SUBSYS_CTNETLINK_EXP, + [NFNLGRP_NFTABLES] = NFNL_SUBSYS_NFTABLES, + [NFNLGRP_ACCT_QUOTA] = NFNL_SUBSYS_ACCT, }; void nfnl_lock(__u8 subsys_id) @@ -464,7 +466,12 @@ static void nfnetlink_rcv(struct sk_buff *skb) static int nfnetlink_bind(int group) { const struct nfnetlink_subsystem *ss; - int type = nfnl_group2type[group]; + int type; + + if (group <= NFNLGRP_NONE || group > NFNLGRP_MAX) + return -EINVAL; + + type = nfnl_group2type[group]; rcu_read_lock(); ss = nfnetlink_get_subsys(type); @@ -514,6 +521,9 @@ static int __init nfnetlink_init(void) { int i; + for (i = NFNLGRP_NONE + 1; i <= NFNLGRP_MAX; i++) + BUG_ON(nfnl_group2type[i] == NFNL_SUBSYS_NONE); + for (i=0; i<NFNL_SUBSYS_COUNT; i++) mutex_init(&table[i].mutex); |