linux-kernel - [PATCH v2 0/2] usb: gadget: use after free in dev

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Message-Id: <20211230043815.18899-1-hbh25y@gmail.com>
Date:   Thu, 30 Dec 2021 12:38:13 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     balbi@...nel.org, gregkh@...uxfoundation.org, axboe@...nel.dk,
        stern@...land.harvard.edu, jj251510319013@...il.com,
        dan.carpenter@...cle.com
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH v2 0/2] usb: gadget: use after free in dev_config

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.

v2:
1. break one patch up into two separate patches.
2. use "fail:" to clear all members.

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 | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

-- 
2.25.1