linux-kernel - [BUG] staging: rtl8192u: Found a bug when removing the module

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Message-ID: <CAMhUBjmX0BDh-35GQxf3-fXFa8_EKfh2fwYKZDgH4NzGGQHiSg@mail.gmail.com>
Date:   Sat, 16 Jul 2022 20:16:35 +0800
From:   Zheyu Ma <zheyuma97@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Tong Zhang <ztong0001@...il.com>
Cc:     linux-staging@...ts.linux.dev,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] staging: rtl8192u: Found a bug when removing the module

Hello,

I found a bug in the rtl8192u module.

When removing the module, I got the following warning:

[   20.407360] remove_proc_entry: removing non-empty directory
'net/rtl819xU', leaking at least 'wlan0'
[   20.408609] WARNING: CPU: 4 PID: 451 at fs/proc/generic.c:718
remove_proc_entry+0x2e1/0x3e0
[   20.412316] RIP: 0010:remove_proc_entry+0x2e1/0x3e0
[   20.420050] Call Trace:
[   20.421178]  rtl8192_usb_module_exit+0x4a/0x63 [r8192u_usb]

I think the problem is the misuse of the proc entry, but I'm not
familiar with the driver, so I'm reporting the bug to you.

regards,

Zheyu Ma