[122/126] net: rate-limit warn-bad-offload splats.

[Steven Rostedt]

3.6.11.3 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Ben Greear <greearb@xxxxxxxxxxxxxxx>

[ Upstream commit c846ad9b880ece01bb4d8d07ba917734edf0324f ]

If one does do something unfortunate and allow a
bad offload bug into the kernel, this the
skb_warn_bad_offload can effectively live-lock the
system, filling the logs with the same error over
and over.

Add rate limitation to this so that box remains otherwise
functional in this case.

Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 net/core/dev.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/dev.c b/net/core/dev.c
index 9509394..cefd2c2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1907,6 +1907,9 @@ static void skb_warn_bad_offload(const struct sk_buff *skb)
 	struct net_device *dev = skb->dev;
 	const char *driver = "";
 
+	if (!net_ratelimit())
+		return;
+
 	if (dev && dev->dev.parent)
 		driver = dev_driver_string(dev->dev.parent);
 
-- 
1.7.10.4


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