linux-kernel - output taint information when the rss-counter check trips up.

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Message-ID: <20120618154817.GA7841@redhat.com>
Date:	Mon, 18 Jun 2012 11:48:17 -0400
From:	Dave Jones <davej@...hat.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: output taint information when the rss-counter check trips up.

We've had a couple reports of this happening, and it's tedious having
to spend a round trip asking "did you have 3rd party modules loaded".

Signed-off-by: Dave Jones <davej@...hat.com>

diff --git a/kernel/fork.c b/kernel/fork.c
index ab5211b..0aa3c51 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -556,7 +556,7 @@ static void check_mm(struct mm_struct *mm)

 		if (unlikely(x))
 			printk(KERN_ALERT "BUG: Bad rss-counter state "
-					  "mm:%p idx:%d val:%ld\n", mm, i, x);
+					  "mm:%p idx:%d val:%ld (%s)\n", mm, i, x, print_tainted());
 	}

 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
--
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