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rapidio: rio: fix possible name leak in rio_register_mport()

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[ Upstream commit e92a216d16bde65d21a3227e0fb2aa0794576525 ]

If device_register() returns error, the name allocated by dev_set_name()
need be freed.  It should use put_device() to give up the reference in the
error path, so that the name can be freed in kobject_cleanup(), and
list_del() is called to delete the port from rio_mports.

Link: https://lkml.kernel.org/r/20221114152636.2939035-3-yangyingliang@huawei.com
Fixes: 2aaf308b95b2 ("rapidio: rework device hierarchy and introduce mport class of devices")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-14 23:26:36 +08:00 committed by Greg Kroah-Hartman
parent 440afd7fd9
commit 1bbad5793f
1 changed files with 7 additions and 2 deletions
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9
drivers/rapidio/rio.c
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@ -2267,11 +2267,16 @@ int rio_register_mport(struct rio_mport *port)
atomic_set(&port->state, RIO_DEVICE_RUNNING);
res = device_register(&port->dev);
if (res)
if (res) {
dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n",
port->id, res);
else
mutex_lock(&rio_mport_list_lock);
list_del(&port->node);
mutex_unlock(&rio_mport_list_lock);
put_device(&port->dev);
} else {
dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id);
}
return res;
}