From: Bob Copeland <me@bobcopeland.com>
To: Christoph Lameter <cl@linux.com>
Cc: "Justin P. Mattock" <justinmattock@gmail.com>,
David Rientjes <rientjes@google.com>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Nick Piggin <npiggin@kernel.dk>,
Dave Chinner <dchinner@redhat.com>,
linux-kernel@vger.kernel.org,
Pekka Enberg <penberg@cs.helsinki.fi>,
Jiri Slaby <jirislaby@gmail.com>,
Nick Kossifidis <mickflemm@gmail.com>,
"Luis R. Rodriguez" <lrodriguez@atheros.com>,
linux-wireless@vger.kernel.org
Subject: Re: <IRQ> [<ffffffff810c9204>] ? __alloc_pages_nodemask+0x622/0x696
Date: Wed, 9 Mar 2011 19:05:02 -0500 [thread overview]
Message-ID: <20110310000502.GA13763@hash.localnet> (raw)
In-Reply-To: <alpine.DEB.2.00.1103091549020.16989@router.home>
On Wed, Mar 09, 2011 at 03:54:24PM -0600, Christoph Lameter wrote:
> [ 7419.322770] wlan0: associated
> [ 7427.161366] ath: Failed to stop TX DMA in 100 msec after killing last frame
> [ 7427.161432] ath: Failed to stop TX DMA!
> [ 7434.492398] ath: Failed to stop TX DMA in 100 msec after killing last frame
> [ 7434.492462] ath: Failed to stop TX DMA!
> [ 7603.339047]
> =============================================================================
> [ 7603.339053] BUG radix_tree_node: Padding overwritten. 0xffff88000008fe00-0xffff88000008fe32
> Could the ath driver corrupt memory if the TX DMA cannot be stopped?
Looks like ath_draintxq() can do something bad (e.g. DMA engine uses
an old address from ath_tx_return_buffer()) if DMA is still active
in ath_drain_all_txq().
But this is ath9k which I'm not so familiar with, maybe Luis can say.
--
Bob Copeland %% www.bobcopeland.com
next prev parent reply other threads:[~2011-03-10 0:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-05 8:25 <IRQ> [<ffffffff810c9204>] ? __alloc_pages_nodemask+0x622/0x696 Justin Mattock
2011-03-06 2:50 ` David Rientjes
2011-03-06 3:20 ` Justin P. Mattock
2011-03-09 4:26 ` Justin P. Mattock
2011-03-09 20:57 ` David Rientjes
2011-03-09 21:18 ` Justin P. Mattock
2011-03-09 21:54 ` Christoph Lameter
2011-03-10 0:05 ` Bob Copeland [this message]
2011-03-15 20:59 ` Luis R. Rodriguez
2011-03-15 21:28 ` Justin P. Mattock
2011-03-15 22:13 ` Luis R. Rodriguez
2011-03-15 23:56 ` Justin P. Mattock
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