From: Stefan Hajnoczi <stefanha@redhat.com>
To: Stefano Garzarella <sgarzare@redhat.com>
Cc: davem@davemloft.net, virtualization@lists.linux-foundation.org,
"Michael S. Tsirkin" <mst@redhat.com>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Jakub Kicinski <kuba@kernel.org>,
kvm@vger.kernel.org
Subject: Re: [PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
Date: Mon, 13 Jul 2020 10:28:39 +0100 [thread overview]
Message-ID: <20200713092839.GD28639@stefanha-x1.localdomain> (raw)
In-Reply-To: <20200710121243.120096-1-sgarzare@redhat.com>
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On Fri, Jul 10, 2020 at 02:12:43PM +0200, Stefano Garzarella wrote:
> Commit 0deab087b16a ("vsock/virtio: use RCU to avoid use-after-free
> on the_virtio_vsock") starts to use RCU to protect 'the_virtio_vsock'
> pointer, but we forgot to annotate it.
>
> This patch adds the annotation to fix the following sparse errors:
>
> net/vmw_vsock/virtio_transport.c:73:17: error: incompatible types in comparison expression (different address spaces):
> net/vmw_vsock/virtio_transport.c:73:17: struct virtio_vsock [noderef] __rcu *
> net/vmw_vsock/virtio_transport.c:73:17: struct virtio_vsock *
> net/vmw_vsock/virtio_transport.c:171:17: error: incompatible types in comparison expression (different address spaces):
> net/vmw_vsock/virtio_transport.c:171:17: struct virtio_vsock [noderef] __rcu *
> net/vmw_vsock/virtio_transport.c:171:17: struct virtio_vsock *
> net/vmw_vsock/virtio_transport.c:207:17: error: incompatible types in comparison expression (different address spaces):
> net/vmw_vsock/virtio_transport.c:207:17: struct virtio_vsock [noderef] __rcu *
> net/vmw_vsock/virtio_transport.c:207:17: struct virtio_vsock *
> net/vmw_vsock/virtio_transport.c:561:13: error: incompatible types in comparison expression (different address spaces):
> net/vmw_vsock/virtio_transport.c:561:13: struct virtio_vsock [noderef] __rcu *
> net/vmw_vsock/virtio_transport.c:561:13: struct virtio_vsock *
> net/vmw_vsock/virtio_transport.c:612:9: error: incompatible types in comparison expression (different address spaces):
> net/vmw_vsock/virtio_transport.c:612:9: struct virtio_vsock [noderef] __rcu *
> net/vmw_vsock/virtio_transport.c:612:9: struct virtio_vsock *
> net/vmw_vsock/virtio_transport.c:631:9: error: incompatible types in comparison expression (different address spaces):
> net/vmw_vsock/virtio_transport.c:631:9: struct virtio_vsock [noderef] __rcu *
> net/vmw_vsock/virtio_transport.c:631:9: struct virtio_vsock *
>
> Fixes: 0deab087b16a ("vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock")
> Reported-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
> net/vmw_vsock/virtio_transport.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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next prev parent reply other threads:[~2020-07-13 9:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-10 12:12 [PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer Stefano Garzarella
2020-07-13 9:28 ` Stefan Hajnoczi [this message]
2020-07-13 10:54 ` Michael S. Tsirkin
2020-07-15 14:34 ` Stefano Garzarella
2020-07-16 0:49 ` Jakub Kicinski
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