linux-kernel - Re: [PATCH v2 2/7] block: rewrite __bio_copy

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]

Date:	Fri, 16 Jan 2015 12:58:45 +0100
From:	Dongsu Park <dongsu.park@...fitbricks.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	linux-kernel@...r.kernel.org, Kent Overstreet <kmo@...erainc.com>,
	Jens Axboe <axboe@...nel.dk>, Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v2 2/7] block: rewrite __bio_copy_iov()

Hi Christoph,

On 16.01.2015 03:31, Christoph Hellwig wrote:
> On Thu, Jan 15, 2015 at 10:18:17AM -0800, Christoph Hellwig wrote:
> > This breaks booting a simple KVM VM for me:
> Seems like the issue actually is in the patch before this one, but
> only shows up with this one applied.
> The root cause is that we only copy the iov_iter, but not the
> actual iovecs into the bio_map_data.
> I have a fixed series, which I'll send out together with various
> related cleanups ASAP.

Thanks for testing it and finding out the root cause.
Strange, I haven't never seen the bug.
Maybe I'd have to test it also with virtio-scsi, which I don't do usually.

Dongsu
--
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/