linux-kernel - [PATCH v1 0/3] usb: gadget: uvc: stability fixes on STREAMOFF.

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Date:   Sat, 30 Sep 2023 11:48:18 -0700
From:   Avichal Rakesh <arakesh@...gle.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Daniel Scally <dan.scally@...asonboard.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Michael Grzeschik <m.grzeschik@...gutronix.de>
Cc:     jchowdhary@...gle.com, etalvala@...gle.com,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Avichal Rakesh <arakesh@...gle.com>
Subject: [PATCH v1 0/3] usb: gadget: uvc: stability fixes on STREAMOFF.

We have been seeing two main stability issues that uvc gadget driver
runs into when stopping streams:
 1. Attempting to queue usb_requests to a disabled usb_ep
 2. use-after-free issue for inflight usb_requests

The three patches below fix the two issues above. Patch 1/3 fixes the
first issue, and Patch 2/3 and 3/3 fix the second issue.

Avichal Rakesh (3):
  usb: gadget: uvc: prevent use of disabled endpoint
  usb: gadget: uvc: Allocate uvc_requests one at a time
  usb: gadget: uvc: Fix use-after-free for inflight usb_requests

 drivers/usb/gadget/function/f_uvc.c     |  11 +-
 drivers/usb/gadget/function/f_uvc.h     |   2 +-
 drivers/usb/gadget/function/uvc.h       |   6 +-
 drivers/usb/gadget/function/uvc_v4l2.c  |  21 ++-
 drivers/usb/gadget/function/uvc_video.c | 189 +++++++++++++++++-------
 5 files changed, 164 insertions(+), 65 deletions(-)

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2.42.0.582.g8ccd20d70d-goog