| 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
| ||
|
Date: Mon, 28 Jun 2010 18:30:28 +0300 From: "Michael S. Tsirkin" <mst@...hat.com> To: kvm@...r.kernel.org, virtualization@...ts.osdl.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, ykaul@...hat.com, markmc@...hat.com Subject: Re: [PATCHv2] vhost-net: add dhclient work-around from userspace On Mon, Jun 28, 2010 at 01:08:07PM +0300, Michael S. Tsirkin wrote: > Userspace virtio server has the following hack > so guests rely on it, and we have to replicate it, too: > > Use port number to detect incoming IPv4 DHCP response packets, > and fill in the checksum for these. > > The issue we are solving is that on linux guests, some apps > that use recvmsg with AF_PACKET sockets, don't know how to > handle CHECKSUM_PARTIAL; > The interface to return the relevant information was added > in 8dc4194474159660d7f37c495e3fc3f10d0db8cc, > and older userspace does not use it. > One important user of recvmsg with AF_PACKET is dhclient, > so we add a work-around just for DHCP. > > Don't bother applying the hack to IPv6 as userspace virtio does not > have a work-around for that - let's hope guests will do the right > thing wrt IPv6. > > Signed-off-by: Michael S. Tsirkin <mst@...hat.com> Tested-by: Laine Stump <laine@...hat.com> -- 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/
Powered by blists - more mailing lists