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mISDN: fix possible memory leak in mISDN_dsp_element_register()

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[ Upstream commit 98a2ac1ca8fd6eca6867726fe238d06e75eb1acd ]

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

The 'entry' is going to be freed in mISDN_dsp_dev_release(), so the
kfree() is removed. list_del() is called in mISDN_dsp_dev_release(),
so it need be initialized.

Fixes: 1fa5ae857b ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221109132832.3270119-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-09 21:28:32 +08:00 • committed by Greg Kroah-Hartman
commit 0f2c681900
1 changed files with 2 additions and 1 deletions
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3
drivers/isdn/mISDN/dsp_pipeline.c
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@ -80,6 +80,7 @@ int mISDN_dsp_element_register(struct mISDN_dsp_element *elem)
if (!entry)
return -ENOMEM;
INIT_LIST_HEAD(&entry->list);
entry->elem = elem;
entry->dev.class = elements_class;
@ -114,7 +115,7 @@ err2:
device_unregister(&entry->dev);
return ret;
err1:
kfree(entry);
put_device(&entry->dev);
return ret;
}
EXPORT_SYMBOL(mISDN_dsp_element_register);