[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <mci7jdezdtzgoxj7zgecf4zyvxk6jixy4jgcwwoxegzkjqqqtx@7zoborovztcs>
Date: Thu, 16 May 2024 10:09:56 +0200
From: Stefano Garzarella <sgarzare@...hat.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: linux-kernel@...r.kernel.org,
syzbot+6c21aeb59d0e82eb2782@...kaller.appspotmail.com, Jeongjun Park <aha310510@...il.com>,
Arseny Krasnov <arseny.krasnov@...persky.com>, "David S . Miller" <davem@...emloft.net>,
Stefan Hajnoczi <stefanha@...hat.com>, Jason Wang <jasowang@...hat.com>,
Eugenio PĂ©rez <eperezma@...hat.com>, kvm@...r.kernel.org, virtualization@...ts.linux.dev,
netdev@...r.kernel.org
Subject: Re: [PATCH] vhost/vsock: always initialize seqpacket_allow
On Wed, May 15, 2024 at 11:05:43AM GMT, Michael S. Tsirkin wrote:
>There are two issues around seqpacket_allow:
>1. seqpacket_allow is not initialized when socket is
> created. Thus if features are never set, it will be
> read uninitialized.
>2. if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared,
> then seqpacket_allow will not be cleared appropriately
> (existing apps I know about don't usually do this but
> it's legal and there's no way to be sure no one relies
> on this).
>
>To fix:
> - initialize seqpacket_allow after allocation
> - set it unconditionally in set_features
>
>Reported-by: syzbot+6c21aeb59d0e82eb2782@...kaller.appspotmail.com
>Reported-by: Jeongjun Park <aha310510@...il.com>
>Fixes: ced7b713711f ("vhost/vsock: support SEQPACKET for transport").
>Cc: Arseny Krasnov <arseny.krasnov@...persky.com>
>Cc: David S. Miller <davem@...emloft.net>
>Cc: Stefan Hajnoczi <stefanha@...hat.com>
>Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
>Acked-by: Arseniy Krasnov <avkrasnov@...utedevices.com>
>Tested-by: Arseniy Krasnov <avkrasnov@...utedevices.com>
>
>---
>
>
>Reposting now it's been tested.
>
> drivers/vhost/vsock.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Thanks for fixing this issue!
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
Powered by blists - more mailing lists