linux-kernel - [PATCH] [90/99] net: filter: Use WARN

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Date:	Wed, 27 Jul 2011 14:49:29 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	joe@...ches.com, davem@...emloft.net, gregkh@...e.de,
	ak@...ux.intel.com, linux-kernel@...r.kernel.org,
	stable@...nel.org, tim.bird@...sony.com
Subject: [PATCH] [90/99] net: filter: Use WARN_RATELIMIT

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

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

From: Joe Perches <joe@...ches.com>

[ Upstream commit 6c4a5cb219520c7bc937ee186ca53f03733bd09f ]

A mis-configured filter can spam the logs with lots of stack traces.

Rate-limit the warnings and add printout of the bogus filter information.

Original-patch-by: Ben Greear <greearb@...delatech.com>
Signed-off-by: Joe Perches <joe@...ches.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 net/core/filter.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.35.y/net/core/filter.c
===================================================================
--- linux-2.6.35.y.orig/net/core/filter.c
+++ linux-2.6.35.y/net/core/filter.c
@@ -292,7 +292,9 @@ load_b:
 			mem[f_k] = X;
 			continue;
 		default:
-			WARN_ON(1);
+			WARN_RATELIMIT(1, "Unknown code:%u jt:%u tf:%u k:%u\n",
+				       fentry->code, fentry->jt,
+				       fentry->jf, fentry->k);
 			return 0;
 		}
 
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