[ 37/42] net: rate-limit warn-bad-offload splats.

From: Greg Kroah-Hartman
Date: Mon Apr 29 2013 - 15:34:31 EST

3.8-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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
net/core/dev.c | 3 +++
1 file changed, 3 insertions(+)

--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2018,6 +2018,9 @@ static void skb_warn_bad_offload(const s
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);

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