Hi Dave,

following are four netfilter fixes for 2.6.31:

- Jesper's rcu_barrier() patch to fix conntrack module unload races

- a patch to fix false positives in TCP conntrack unacknowledged data
  detection, resulting in very short timeout values

- a missing linux/types.h include in xt_osf.h

- a fix for a conntrack match regression introduced with the last revision:
  the state member in the configuration struct isn't able to hold all valid
  values. This unfortunately needs a new revision.

Please apply or pull from:

git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6.git master

Thanks!


 include/linux/netfilter/xt_conntrack.h |   13 ++++++
 include/linux/netfilter/xt_osf.h       |    2 +
 include/net/netfilter/nf_conntrack.h   |    4 +-
 net/ipv4/netfilter/nf_nat_helper.c     |   17 +++++---
 net/netfilter/nf_conntrack_expect.c    |    4 +-
 net/netfilter/nf_conntrack_extend.c    |    2 +-
 net/netfilter/nf_conntrack_proto_tcp.c |    6 +-
 net/netfilter/xt_conntrack.c           |   66 +++++++++++++++++++++++++++++---
 8 files changed, 95 insertions(+), 19 deletions(-)

Jan Engelhardt (1):
      netfilter: xtables: conntrack match revision 2

Jaswinder Singh Rajput (1):
      netfilter: headers_check fix: linux/netfilter/xt_osf.h

Jesper Dangaard Brouer (1):
      nf_conntrack: Use rcu_barrier()

Patrick McHardy (1):
      netfilter: tcp conntrack: fix unacknowledged data detection with NAT
--

[ message continues ]

commit 308ff823ebd749a94d3b6ac26b95bc0eb114c39e
Author: Jesper Dangaard Brouer <hawk@comx.dk>
Date:   Thu Jun 25 16:32:52 2009 +0200

    nf_conntrack: Use rcu_barrier()
    
    RCU barriers, rcu_barrier(), is inserted two places.
    
     In nf_conntrack_expect.c nf_conntrack_expect_fini() before the
     kmem_cache_destroy().  Firstly to make sure the callback to the
     nf_ct_expect_free_rcu() code is still around.  Secondly because I'm
     unsure about the consequence of having in flight
     nf_ct_expect_free_rcu/kmem_cache_free() calls while doing a
     kmem_cache_destroy() slab destroy.
    
     And in nf_conntrack_extend.c nf_ct_extend_unregister(), inorder to
     wait for completion of callbacks to __nf_ct_ext_free_rcu(), which is
     invoked by __nf_ct_ext_add().  It might be more efficient to call
     rcu_barrier() in nf_conntrack_core.c nf_conntrack_cleanup_net(), but
     thats make it more difficult to read the code (as the callback code
     in located in nf_conntrack_extend.c).
    
    Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index afde8f9..2032dfe 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -617,8 +617,10 @@ err1:
 void nf_conntrack_expect_fini(struct net *net)
 {
 	exp_proc_remove(net);
-	if (net_eq(net, &init_net))
+	if (net_eq(net, &init_net)) {
+		rcu_barrier(); /* Wait for call_rcu() before destroy */
 		kmem_cache_destroy(nf_ct_expect_cachep);
+	}
 	nf_ct_free_hashtable(net->ct.expect_hash, net->ct.expect_vmalloc,
 			     nf_ct_expect_hsize);
 }
diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index 4b2c769..fef95be 100644
--- a/net/netfilter/nf_conntrack_extend.c
+++ b/net/netfilter/nf_conntrack_extend.c
@@ -186,6 +186,6 @@ void nf_ct_extend_unregister(struct nf_ct_ext_type *type)
 ...
[ message continues ]

commit d6d3f08b0fd998b647a05540cedd11a067b72867
Author: Jan Engelhardt <jengelh@medozas.de>
Date:   Mon Jun 29 14:31:46 2009 +0200

    netfilter: xtables: conntrack match revision 2
    
    As reported by Philip, the UNTRACKED state bit does not fit within
    the 8-bit state_mask member. Enlarge state_mask and give status_mask
    a few more bits too.
    
    Reported-by: Philip Craig <philipc@snapgear.com>
    References: http://markmail.org/thread/b7eg6aovfh4agyz7
    Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/include/linux/netfilter/xt_conntrack.h b/include/linux/netfilter/xt_conntrack.h
index 3430c77..7ae0533 100644
--- a/include/linux/netfilter/xt_conntrack.h
+++ b/include/linux/netfilter/xt_conntrack.h
@@ -81,4 +81,17 @@ struct xt_conntrack_mtinfo1 {
 	__u8 state_mask, status_mask;
 };
 
+struct xt_conntrack_mtinfo2 {
+	union nf_inet_addr origsrc_addr, origsrc_mask;
+	union nf_inet_addr origdst_addr, origdst_mask;
+	union nf_inet_addr replsrc_addr, replsrc_mask;
+	union nf_inet_addr repldst_addr, repldst_mask;
+	__u32 expires_min, expires_max;
+	__u16 l4proto;
+	__be16 origsrc_port, origdst_port;
+	__be16 replsrc_port, repldst_port;
+	__u16 match_flags, invert_flags;
+	__u16 state_mask, status_mask;
+};
+
 #endif /*_XT_CONNTRACK_H*/
diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index 0b7139f..fc58180 100644
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -129,7 +129,7 @@ conntrack_addrcmp(const union nf_inet_addr *kaddr,
 
 static inline bool
 conntrack_mt_origsrc(const struct nf_conn *ct,
-                     const struct xt_conntrack_mtinfo1 *info,
+                     const struct xt_conntrack_mtinfo2 *info,
 		     u_int8_t family)
 {
 	return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3,
@@ -138,7 +138,7 @@ conntrack_mt_origsrc(const struct nf_conn *ct,
 
 static inline bool
 ...
[ message continues ]

commit a3a9f79e361e864f0e9d75ebe2a0cb43d17c4272
Author: Patrick McHardy <kaber@trash.net>
Date:   Mon Jun 29 14:07:56 2009 +0200

    netfilter: tcp conntrack: fix unacknowledged data detection with NAT
    
    When NAT helpers change the TCP packet size, the highest seen sequence
    number needs to be corrected. This is currently only done upwards, when
    the packet size is reduced the sequence number is unchanged. This causes
    TCP conntrack to falsely detect unacknowledged data and decrease the
    timeout.
    
    Fix by updating the highest seen sequence number in both directions after
    packet mangling.
    
    Tested-by: Krzysztof Piotr Oledzki <ole@ans.pl>
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index a632689..cbdd628 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -258,8 +258,8 @@ static inline bool nf_ct_kill(struct nf_conn *ct)
 /* Update TCP window tracking data when NAT mangles the packet */
 extern void nf_conntrack_tcp_update(const struct sk_buff *skb,
 				    unsigned int dataoff,
-				    struct nf_conn *ct,
-				    int dir);
+				    struct nf_conn *ct, int dir,
+				    s16 offset);
 
 /* Fake conntrack entry for untracked connections */
 extern struct nf_conn nf_conntrack_untracked;
diff --git a/net/ipv4/netfilter/nf_nat_helper.c b/net/ipv4/netfilter/nf_nat_helper.c
index 155c008..09172a6 100644
--- a/net/ipv4/netfilter/nf_nat_helper.c
+++ b/net/ipv4/netfilter/nf_nat_helper.c
@@ -191,7 +191,8 @@ nf_nat_mangle_tcp_packet(struct sk_buff *skb,
 				    ct, ctinfo);
 		/* Tell TCP window tracking about seq change */
 		nf_conntrack_tcp_update(skb, ip_hdrlen(skb),
-					ct, CTINFO2DIR(ctinfo));
+					ct, CTINFO2DIR(ctinfo),
+					(int)rep_len - (int)match_len);
 
 		nf_conntrack_event_cache(IPCT_NATSEQADJ, ct);
 	}
@@ -377,6 +378,7 @@ nf_nat_seq_adjust(struct sk_buff *skb,
 	struct ...
[ message continues ]

commit 8a3af79361e85db6fec4173ef1916322471c19e3
Author: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Date:   Mon Jun 29 14:28:27 2009 +0200

    netfilter: headers_check fix: linux/netfilter/xt_osf.h
    
    fix the following 'make headers_check' warnings:
    
      usr/include/linux/netfilter/xt_osf.h:40: found __[us]{8,16,32,64} type without #include <linux/types.h>
    
    Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/include/linux/netfilter/xt_osf.h b/include/linux/netfilter/xt_osf.h
index fd2272e..18afa49 100644
--- a/include/linux/netfilter/xt_osf.h
+++ b/include/linux/netfilter/xt_osf.h
@@ -20,6 +20,8 @@
 #ifndef _XT_OSF_H
 #define _XT_OSF_H
 
+#include <linux/types.h>
+
 #define MAXGENRELEN		32
 
 #define XT_OSF_GENRE		(1<<0)
--

[ message continues ]

Do you think this should be added to MAINTAINERS?

Signed-off-by: Joe Perches <joe@perches.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index fa2a16d..a5042de 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4044,6 +4044,7 @@ L:	netfilter@vger.kernel.org
 L:	coreteam@netfilter.org
 W:	http://www.netfilter.org/
 W:	http://www.iptables.org/
+T:	git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6.git
 S:	Supported
 F:	include/linux/netfilter*
 F:	include/linux/netfilter/


--

[ message continues ]

Applied, thanks.
--

[ message continues ]

From: Patrick McHardy <kaber@trash.net>

Pulled, thanks a lot Patrick!
--

[ message continues ]