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scsi: scsi_debug: Fix possible name leak in sdebug_add_host_helper() 

Afer commit 1fa5ae857b ("driver core: get rid of struct device's bus_id
string array"), the name of device is allocated dynamically, it needs be
freed when device_register() returns error.

As comment of device_register() says, one should use put_device() to give
up the reference in the error path. Fix this by calling put_device(), then
the name can be freed in kobject_cleanup(), and sdbg_host is freed in
sdebug_release_adapter().

When the device release is not set, it means the device is not initialized.
We can not call put_device() in this case. Use kfree() to free memory.

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/20221112131010.3757845-1-yangyingliang@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Yang Yingliang 2022-11-12 21:10:10 +08:00 committed by Martin K. Petersen
parent 47b6a122c7
commit e6d773f93a
1 changed files with 4 additions and 1 deletions
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5
drivers/scsi/scsi_debug.c
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@ -7329,7 +7329,10 @@ clean:
kfree(sdbg_devinfo->zstate);
kfree(sdbg_devinfo);
}
kfree(sdbg_host);
if (sdbg_host->dev.release)
put_device(&sdbg_host->dev);
else
kfree(sdbg_host);
pr_warn("%s: failed, errno=%d\n", __func__, -error);
return error;
}