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| author | Fedor Pchelkin <pchelkin@ispras.ru> | 2022-07-29 17:36:55 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-08-09 09:05:06 +0200 |
| commit | 8ef49f7f8244424adcf4a546dba4cbbeb0b09c09 (patch) | |
| tree | 3dd62149c949b849d06b817847331e927ded6da7 /net | |
| parent | b8c3bf0ed2edf2deaedba5f0bf0bb54c76dee71d (diff) | |
| download | linux-8ef49f7f8244424adcf4a546dba4cbbeb0b09c09.tar.bz2 | |
can: j1939: j1939_sk_queue_activate_next_locked(): replace WARN_ON_ONCE with netdev_warn_once()
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>
Link: https://lore.kernel.org/all/20220729143655.1108297-1-pchelkin@ispras.ru
[mkl: fix indention]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/can/j1939/socket.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c index f5ecfdcf57b2..b670ba03a675 100644 --- a/net/can/j1939/socket.c +++ b/net/can/j1939/socket.c @@ -178,7 +178,10 @@ activate_next: 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 { |