linux-kernel - Re: BUG in drivers/dma/ioat/dma

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: <1277923422.16256.8.camel@localhost>
Date:	Wed, 30 Jun 2010 19:43:42 +0100
From:	David Woodhouse <David.Woodhouse@...el.com>
To:	Chris Li <lkml@...isli.org>
Cc:	"Williams, Dan J" <dan.j.williams@...el.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: BUG in drivers/dma/ioat/dma_v2.c:314

On Wed, 2010-06-30 at 19:26 +0100, Chris Li wrote:
> 
> The delta seems to be this line:
> ioatdma 0000:00:0f.0: ioat2_set_chainaddr: chainaddr: ffffe000 

That's a reasonable address if the IOMMU is enabled. We start at 4GiB
and work down, so that's the second page given out (or the first 8KiB
chunk).

It looks like the DMA is going AWOL causing the initialisation to
fail... but it's interesting that there are no DMA faults reported by
the IOMMU.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

--
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/