linux-kernel - Re: next-20081215: kernel BUG at block/cfq-iosched.c:1243

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20081215201836.GM32491@kernel.dk>
Date:	Mon, 15 Dec 2008 21:18:36 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Alexander Beregalov <a.beregalov@...il.com>
Cc:	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: next-20081215: kernel BUG at block/cfq-iosched.c:1243

On Mon, Dec 15 2008, Alexander Beregalov wrote:
> 2008/12/15 Jens Axboe <jens.axboe@...cle.com>:
> > On Mon, Dec 15 2008, Alexander Beregalov wrote:
> >> 2008/12/15 Jens Axboe <jens.axboe@...cle.com>:
> >> >> [   23.080733] kernel BUG at block/cfq-iosched.c:1243!
> >> >> [   23.080733] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> >>
> >> > Odd, is it reproducible? What is your .config?
> >> Yes, it is
> >>
> >> Config is in attach
> >
> > It's weird, because the only change for CFQ in that area is the one
> > below. Does the oops go away if you back this out?
> Yes, it can boot without the patch, no oops.

OK, dumb error. Please try this instead, on top of -next:

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 8a2485d..e8525fa 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1322,7 +1322,6 @@ static void cfq_exit_single_io_context(struct io_context *ioc,
 		smp_read_barrier_depends();
 		if (cic->key)
 			__cfq_exit_single_io_context(cfqd, cic);
-		__cfq_exit_single_io_context(cfqd, cic);
 
 		spin_unlock_irqrestore(q->queue_lock, flags);
 	}

-- 
Jens Axboe

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/