Patch "netfilter: don't reset nf_trace in nf_reset()" has been added to the 3.8-stable tree

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This is a note to let you know that I've just added the patch titled

    netfilter: don't reset nf_trace in nf_reset()

to the 3.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     netfilter-don-t-reset-nf_trace-in-nf_reset.patch
and it can be found in the queue-3.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From ac766bed56a80da9e9a88c1178810f0206c438ef Mon Sep 17 00:00:00 2001
From: Patrick McHardy <kaber@xxxxxxxxx>
Date: Fri, 5 Apr 2013 20:42:05 +0200
Subject: netfilter: don't reset nf_trace in nf_reset()


From: Patrick McHardy <kaber@xxxxxxxxx>

[ Upstream commit 124dff01afbdbff251f0385beca84ba1b9adda68 ]

Commit 130549fe ("netfilter: reset nf_trace in nf_reset") added code
to reset nf_trace in nf_reset(). This is wrong and unnecessary.

nf_reset() is used in the following cases:

- when passing packets up the the socket layer, at which point we want to
  release all netfilter references that might keep modules pinned while
  the packet is queued. nf_trace doesn't matter anymore at this point.

- when encapsulating or decapsulating IPsec packets. We want to continue
  tracing these packets after IPsec processing.

- when passing packets through virtual network devices. Only devices on
  that encapsulate in IPv4/v6 matter since otherwise nf_trace is not
  used anymore. Its not entirely clear whether those packets should
  be traced after that, however we've always done that.

- when passing packets through virtual network devices that make the
  packet cross network namespace boundaries. This is the only cases
  where we clearly want to reset nf_trace and is also what the
  original patch intended to fix.

Add a new function nf_reset_trace() and use it in dev_forward_skb() to
fix this properly.

Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 include/linux/skbuff.h |    7 +++++++
 net/core/dev.c         |    1 +
 2 files changed, 8 insertions(+)

--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2597,6 +2597,13 @@ static inline void nf_reset(struct sk_bu
 #endif
 }
 
+static inline void nf_reset_trace(struct sk_buff *skb)
+{
+#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
+	skb->nf_trace = 0;
+#endif
+}
+
 /* Note: This doesn't put any conntrack and bridge info in dst. */
 static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
 {
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1737,6 +1737,7 @@ int dev_forward_skb(struct net_device *d
 	skb->mark = 0;
 	secpath_reset(skb);
 	nf_reset(skb);
+	nf_reset_trace(skb);
 	return netif_rx(skb);
 }
 EXPORT_SYMBOL_GPL(dev_forward_skb);


Patches currently in stable-queue which might be from kaber@xxxxxxxxx are

queue-3.8/netfilter-don-t-reset-nf_trace-in-nf_reset.patch
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