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From:   Hangyu Hua <hbh25y@gmail.com>
To:     gregkh@linuxfoundation.org
Cc:     stable@vger.kernel.org, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org, ben@decadent.org.uk,
        balbi@kernel.org, axboe@kernel.dk, mingo@kernel.org,
        jj251510319013@gmail.com, zsm@chromium.org,
        stern@rowland.harvard.edu, Hangyu Hua <hbh25y@gmail.com>
Subject: [PATCH 4.14 0/2] usb: gadget: use after free in dev_config
Date:   Tue,  1 Mar 2022 10:26:06 +0800
Message-Id: <20220301022608.10950-1-hbh25y@gmail.com>
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Author: Hangyu Hua <hbh25y@gmail.com>
commit 89f3594d0de5 ("usb: gadget: don't release an existing dev->buf")

Author: Hangyu Hua <hbh25y@gmail.com>
commit 501e38a5531e ("usb: gadget: clear related members when goto fail")

Add two commits to all stable branches.

There are two bugs:
dev->buf does not need to be released if it already exists before
executing dev_config.
dev->config and dev->hs_config and dev->dev need to be cleaned if
dev_config fails to avoid UAF.

Hangyu Hua (2):
  usb: gadget: don't release an existing dev->buf
  usb: gadget: clear related members when goto fail

 drivers/usb/gadget/legacy/inode.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

-- 
2.25.1