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| author | YueHaibing <yuehaibing@huawei.com> | 2019-05-16 22:36:26 +0800 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2019-06-07 23:03:54 +0200 |
| commit | c5a3aed1cd3152429348ee1fe5cdcca65fe901ce (patch) | |
| tree | 1dd7236f7e6f58f2629e084d159cfb1c0d128443 /net/can | |
| parent | 3e82f2f34c930a2a0a9e69fdc2de2f2f1388b442 (diff) | |
| download | linux-stable-c5a3aed1cd3152429348ee1fe5cdcca65fe901ce.tar.gz linux-stable-c5a3aed1cd3152429348ee1fe5cdcca65fe901ce.tar.bz2 linux-stable-c5a3aed1cd3152429348ee1fe5cdcca65fe901ce.zip | |
can: af_can: Fix error path of can_init()
This patch add error path for can_init() to avoid possible crash if some
error occurs.
Fixes: 0d66548a10cb ("[CAN]: Add PF_CAN core module")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can')
| -rw-r--r-- | net/can/af_can.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c index e8fd5dc1780a..743470680127 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -952,6 +952,8 @@ static struct pernet_operations can_pernet_ops __read_mostly = { static __init int can_init(void) { + int err; + /* check for correct padding to be able to use the structs similarly */ BUILD_BUG_ON(offsetof(struct can_frame, can_dlc) != offsetof(struct canfd_frame, len) || @@ -965,15 +967,31 @@ static __init int can_init(void) if (!rcv_cache) return -ENOMEM; - register_pernet_subsys(&can_pernet_ops); + err = register_pernet_subsys(&can_pernet_ops); + if (err) + goto out_pernet; /* protocol register */ - sock_register(&can_family_ops); - register_netdevice_notifier(&can_netdev_notifier); + err = sock_register(&can_family_ops); + if (err) + goto out_sock; + err = register_netdevice_notifier(&can_netdev_notifier); + if (err) + goto out_notifier; + dev_add_pack(&can_packet); dev_add_pack(&canfd_packet); return 0; + +out_notifier: + sock_unregister(PF_CAN); +out_sock: + unregister_pernet_subsys(&can_pernet_ops); +out_pernet: + kmem_cache_destroy(rcv_cache); + + return err; } static __exit void can_exit(void) |