Stefano Garzarella
2020-Jul-10 12:12 UTC
[PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
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 at redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare at redhat.com>
---
net/vmw_vsock/virtio_transport.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index dfbaf6bd8b1c..2700a63ab095 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -22,7 +22,7 @@
#include <net/af_vsock.h>
static struct workqueue_struct *virtio_vsock_workqueue;
-static struct virtio_vsock *the_virtio_vsock;
+static struct virtio_vsock __rcu *the_virtio_vsock;
static DEFINE_MUTEX(the_virtio_vsock_mutex); /* protects the_virtio_vsock */
struct virtio_vsock {
--
2.26.2
Stefan Hajnoczi
2020-Jul-13 09:28 UTC
[PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
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 at redhat.com> > Signed-off-by: Stefano Garzarella <sgarzare at redhat.com> > --- > net/vmw_vsock/virtio_transport.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)Reviewed-by: Stefan Hajnoczi <stefanha at redhat.com> -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 488 bytes Desc: not available URL: <http://lists.linuxfoundation.org/pipermail/virtualization/attachments/20200713/5270c353/attachment.sig>
Michael S. Tsirkin
2020-Jul-13 10:54 UTC
[PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
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 at redhat.com> > Signed-off-by: Stefano Garzarella <sgarzare at redhat.com>Acked-by: Michael S. Tsirkin <mst at redhat.com> who's merging this? Dave?> --- > net/vmw_vsock/virtio_transport.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c > index dfbaf6bd8b1c..2700a63ab095 100644 > --- a/net/vmw_vsock/virtio_transport.c > +++ b/net/vmw_vsock/virtio_transport.c > @@ -22,7 +22,7 @@ > #include <net/af_vsock.h> > > static struct workqueue_struct *virtio_vsock_workqueue; > -static struct virtio_vsock *the_virtio_vsock; > +static struct virtio_vsock __rcu *the_virtio_vsock; > static DEFINE_MUTEX(the_virtio_vsock_mutex); /* protects the_virtio_vsock */ > > struct virtio_vsock { > -- > 2.26.2
Stefano Garzarella
2020-Jul-15 14:34 UTC
[PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
On Mon, Jul 13, 2020 at 06:54:43AM -0400, Michael S. Tsirkin wrote:> 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 at redhat.com> > > Signed-off-by: Stefano Garzarella <sgarzare at redhat.com> > > > Acked-by: Michael S. Tsirkin <mst at redhat.com> > > who's merging this? Dave?I think so, but I forgot the 'net' tag :-( I'll wait to see if Dave will queue this, otherwise I'll resend with the 'net' tag. Thanks, Stefano
Apparently Analagous Threads
- [PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
- sparse warnings in net/vmw_vsock/virtio_transport.c
- [PATCH] vsock/virtio: annotate 'the_virtio_vsock' RCU pointer
- [PATCH v2 1/3] vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock
- [PATCH v2 1/3] vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock