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mISDN: fix possible memory leak in mISDN_register_device()

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[ Upstream commit e7d1d4d9ac0dfa40be4c2c8abd0731659869b297 ]

Afer commit 1fa5ae857b ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically,
add put_device() to give up the reference, so that the name can be
freed in kobject_cleanup() when the refcount is 0.

Set device class before put_device() to avoid null release() function
WARN message in device_release().

Fixes: 1fa5ae857b ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-10-31 20:13:40 +08:00 committed by Greg Kroah-Hartman
parent b13be5e852
commit 2ff6b66952
1 changed files with 3 additions and 2 deletions
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5
drivers/isdn/mISDN/core.c
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@ -233,11 +233,12 @@ mISDN_register_device(struct mISDNdevice *dev,
if (debug & DEBUG_CORE)
printk(KERN_DEBUG "mISDN_register %s %d\n",
dev_name(&dev->dev), dev->id);
dev->dev.class = &mISDN_class;
err = create_stack(dev);
if (err)
goto error1;
dev->dev.class = &mISDN_class;
dev->dev.platform_data = dev;
dev->dev.parent = parent;
dev_set_drvdata(&dev->dev, dev);
@ -249,8 +250,8 @@ mISDN_register_device(struct mISDNdevice *dev,
error3:
delete_stack(dev);
return err;
error1:
put_device(&dev->dev);
return err;
}