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| author | Patrick McHardy <kaber@trash.net> | 2006-09-20 12:11:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 15:20:20 -0700 |
| commit | 4c5de695cf7f71c85ad8cfff509f6475b8bd4d27 (patch) | |
| tree | 5175e20ab9244b4a0961ae98d85c8823956aad77 | |
| parent | fd5e3befa405ea64d4db6b393b821644bf963c57 (diff) | |
| download | linux-4c5de695cf7f71c85ad8cfff509f6475b8bd4d27.tar.gz linux-4c5de695cf7f71c85ad8cfff509f6475b8bd4d27.tar.bz2 linux-4c5de695cf7f71c85ad8cfff509f6475b8bd4d27.zip | |
[NETFILTER]: PPTP conntrack: fix another GRE keymap leak
When the master PPTP connection times out while still having unfullfilled
expectations (and a GRE keymap entry) associated with it, the keymap entry
is not destroyed.
Add a destroy callback to struct ip_conntrack_helper and use it to destroy
PPTP siblings when the master is destroyed.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/netfilter_ipv4/ip_conntrack_helper.h | 2 | ||||
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_core.c | 5 | ||||
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_helper_pptp.c | 12 |
3 files changed, 9 insertions, 10 deletions
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_helper.h b/include/linux/netfilter_ipv4/ip_conntrack_helper.h index 8d69279ccfe4..77fe868d36ff 100644 --- a/include/linux/netfilter_ipv4/ip_conntrack_helper.h +++ b/include/linux/netfilter_ipv4/ip_conntrack_helper.h @@ -25,6 +25,8 @@ struct ip_conntrack_helper struct ip_conntrack *ct, enum ip_conntrack_info conntrackinfo); + void (*destroy)(struct ip_conntrack *ct); + int (*to_nfattr)(struct sk_buff *skb, const struct ip_conntrack *ct); }; diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c index 2b6f24fc727e..c432b3163609 100644 --- a/net/ipv4/netfilter/ip_conntrack_core.c +++ b/net/ipv4/netfilter/ip_conntrack_core.c @@ -307,6 +307,7 @@ destroy_conntrack(struct nf_conntrack *nfct) { struct ip_conntrack *ct = (struct ip_conntrack *)nfct; struct ip_conntrack_protocol *proto; + struct ip_conntrack_helper *helper; DEBUGP("destroy_conntrack(%p)\n", ct); IP_NF_ASSERT(atomic_read(&nfct->use) == 0); @@ -315,6 +316,10 @@ destroy_conntrack(struct nf_conntrack *nfct) ip_conntrack_event(IPCT_DESTROY, ct); set_bit(IPS_DYING_BIT, &ct->status); + helper = ct->helper; + if (helper && helper->destroy) + helper->destroy(ct); + /* To make sure we don't get any weird locking issues here: * destroy_conntrack() MUST NOT be called with a write lock * to ip_conntrack_lock!!! -HW */ diff --git a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c index 98267b0d2a47..fb0aee691721 100644 --- a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c +++ b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c @@ -553,15 +553,6 @@ conntrack_pptp_help(struct sk_buff **pskb, nexthdr_off += tcph->doff * 4; datalen = tcplen - tcph->doff * 4; - if (tcph->fin || tcph->rst) { - DEBUGP("RST/FIN received, timeouting GRE\n"); - /* can't do this after real newnat */ - info->cstate = PPTP_CALL_NONE; - - /* untrack this call id, unexpect GRE packets */ - pptp_destroy_siblings(ct); - } - pptph = skb_header_pointer(*pskb, nexthdr_off, sizeof(_pptph), &_pptph); if (!pptph) { DEBUGP("no full PPTP header, can't track\n"); @@ -640,7 +631,8 @@ static struct ip_conntrack_helper pptp = { .protonum = 0xff } }, - .help = conntrack_pptp_help + .help = conntrack_pptp_help, + .destroy = pptp_destroy_siblings, }; extern void ip_ct_proto_gre_fini(void); |