| Message ID | 20220729140609.980154-1-pchelkin@ispras.ru (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [v2] can: j1939: Replace WARN_ON_ONCE with netdev_warn_once() in j1939_sk_queue_activate_next_locked() | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Series ignored based on subject |
On Fri, Jul 29, 2022 at 05:06:09PM +0300, Fedor Pchelkin wrote: > We should warn user-space that it is doing something wrong when trying to > activate sessions with identical parameters but WARN_ON_ONCE macro can not > be used here as it serves a different purpose. > > So it would be good to replace it with netdev_warn_once() message. > > Found by Linux Verification Center (linuxtesting.org) with Syzkaller. > > Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") > Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> > Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> > --- > v1 -> v2: Used netdev_warn_once() instead of pr_warn_once() > > net/can/j1939/socket.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c > index f5ecfdcf57b2..09e1d78bd22c 100644 > --- a/net/can/j1939/socket.c > +++ b/net/can/j1939/socket.c > @@ -178,7 +178,10 @@ static void j1939_sk_queue_activate_next_locked(struct j1939_session *session) > if (!first) > return; > > - if (WARN_ON_ONCE(j1939_session_activate(first))) { > + if (j1939_session_activate(first)) { > + netdev_warn_once(first->priv->ndev, > + "%s: 0x%p: Identical session is already activated.\n", > + __func__, first); > first->err = -EBUSY; > goto activate_next; > } else { > -- > 2.25.1 > >
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c index f5ecfdcf57b2..09e1d78bd22c 100644 --- a/net/can/j1939/socket.c +++ b/net/can/j1939/socket.c @@ -178,7 +178,10 @@ static void j1939_sk_queue_activate_next_locked(struct j1939_session *session) if (!first) return; - if (WARN_ON_ONCE(j1939_session_activate(first))) { + if (j1939_session_activate(first)) { + netdev_warn_once(first->priv->ndev, + "%s: 0x%p: Identical session is already activated.\n", + __func__, first); first->err = -EBUSY; goto activate_next; } else {
We should warn user-space that it is doing something wrong when trying to activate sessions with identical parameters but WARN_ON_ONCE macro can not be used here as it serves a different purpose. So it would be good to replace it with netdev_warn_once() message. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> --- v1 -> v2: Used netdev_warn_once() instead of pr_warn_once() net/can/j1939/socket.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)