netdev - Re: macvtap MAX_SKB

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:	Tue, 06 Aug 2013 16:39:02 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, mst@...hat.com
Subject: Re: macvtap MAX_SKB_FRAGS fix...

On 08/06/2013 11:51 AM, David Miller wrote:
> Jason, I want to get that into v3.4.x -stable but it needs a backport
> and I'd rather someone like you who knows the code does it rather
> than I.
>
> The issue seems that be that the arguments to uarg->callback() were
> different back then.
>
> Thanks.

Sure.

For 3.4.x we need to pick c70aa540c7a9f67add11ad3161096fb95233aa2e
(vhost: zerocopy: poll vq in zerocopy callback) first to let the
backport work. The reason of different arguments is because 3.4.x does
not track DMA failure. So we can just do uarg->callback(uarg);

Please see the attached patches.

Thanks

View attachment "0001-vhost-zerocopy-poll-vq-in-zerocopy-callback.patch" of type "text/x-patch" (1229 bytes)

View attachment "0002-macvtap-do-not-zerocopy-if-iov-needs-more-pages-than.patch" of type "text/x-patch" (3917 bytes)