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From:   Dongyang Zhan <zdyzztq@gmail.com>
Date:   Thu, 14 May 2020 12:03:11 +0800
Message-ID: <CAFSR4cvAPkKzkNUOrifc8_TGno-+GYJ_DxJ5LKu0pt5M-o5HVA@mail.gmail.com>
Subject: Fwd: Potential memory leak bug in rtl8xxxu_tx() by triggering
 usb_submit_urb() failures
To:     linux-wireless@vger.kernel.org
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---------- Forwarded message ---------
=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A Dongyang Zhan <zdyzztq@gmail.com>
Date: 2020=E5=B9=B45=E6=9C=883=E6=97=A5=E5=91=A8=E6=97=A5 =E4=B8=8B=E5=8D=
=882:45
Subject: Potential memory leak bug in rtl8xxxu_tx() by triggering
usb_submit_urb() failures
To: <linux-wireless@vger.kernel.org>


Hi,

I am a security researcher, my name is Dongyang Zhan. I found a potential b=
ug in

/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c in Linux
4.10.17. I hope you can help me to confirm it.

If usb_submit_urb() fails, usb_unanchor_urb cannot free tx_urb->urb,
causing memory consumption bug. This bug is similar with
CVE-2019-19068, which adds usb_free_urb() as bug fix.

Thank you.