From: Ben Greear <greearb@candelatech.com>
Date: Fri, 19 Apr 2013 10:45:52 +0000 (+0000)
Subject: net: rate-limit warn-bad-offload splats.
X-Git-Tag: v3.4.43~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4087320fd8d0164c4b53fe5f9c26c0d3eaba7d2d;p=thirdparty%2Fkernel%2Fstable.git

net: rate-limit warn-bad-offload splats.

[ 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@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index a8cffb43e90c1..dd12421b9e85e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1895,6 +1895,9 @@ 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);