WSL2-Linux-Kernel/drivers/usb
Mathias Nyman f9a5b4f58b usb: Avoid use-after-free by flushing endpoints early in usb_set_interface()
The steps taken by usb core to set a new interface is very different from
what is done on the xHC host side.

xHC hardware will do everything in one go. One command is used to set up
new endpoints, free old endpoints, check bandwidth, and run the new
endpoints.

All this is done by xHC when usb core asks the hcd to check for
available bandwidth. At this point usb core has not yet flushed the old
endpoints, which will cause use-after-free issues in xhci driver as
queued URBs are cancelled on a re-allocated endpoint.

To resolve this add a call to usb_disable_interface() which will flush
the endpoints before calling usb_hcd_alloc_bandwidth()

Additional checks in xhci driver will also be implemented to gracefully
handle stale URB cancel on freed and re-allocated endpoints

Cc: <stable@vger.kernel.org>
Reported-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-05 14:36:53 +02:00
..
atm USB: atm: fix up some remaining DEVICE_ATTR() usage 2018-01-24 08:49:52 +01:00
c67x00 USB: add SPDX identifiers to all remaining Makefiles 2017-11-07 15:53:48 +01:00
chipidea Merge 4.18-rc7 into usb-next 2018-07-30 10:04:58 +02:00
class Merge 4.18-rc7 into usb-next 2018-07-30 10:04:58 +02:00
common usb: common: Small class for USB role switches 2018-03-22 13:40:10 +01:00
core usb: Avoid use-after-free by flushing endpoints early in usb_set_interface() 2018-09-05 14:36:53 +02:00
dwc2 usb: changes for v4.19 2018-07-30 10:21:14 +02:00
dwc3 usb/dwc3/gadget: fix kernel-doc parameter warning 2018-09-05 13:27:07 +02:00
early usb: early: Correct the endpoint type value for bulk in endpoint 2017-12-07 16:03:15 +01:00
gadget Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
host usb: host: xhci-plat: Iterate over parent nodes for finding quirks 2018-09-05 13:27:06 +02:00
image USB/PHY patches for 4.15-rc1 2017-11-13 21:14:07 -08:00
isp1760 usb: isp1760: remove redundant variable 'selector' 2018-07-13 15:41:56 +02:00
misc USB: yurex: Check for truncation in yurex_read() 2018-09-05 13:27:06 +02:00
mon USB: mon: use ktime_get_real_ts64 instead of getnstimeofday64 2018-06-25 21:58:26 +08:00
mtu3 usb: mtu3: fix error of xhci port id when enable U3 dual role 2018-09-05 13:27:07 +02:00
musb USB: musb: mark expected switch fall-throughs 2018-07-02 18:08:19 +02:00
phy usb/phy: fix PPC64 build errors in phy-fsl-usb.c 2018-07-21 08:15:12 +02:00
renesas_usbhs usb: renesas_usbhs: Kconfig: convert to SPDX identifiers 2018-07-30 15:27:14 +02:00
roles usb: roles: intel_xhci: Enable runtime PM 2018-05-24 18:17:00 +02:00
serial USB: serial: pl2303: add a new device id for ATEN 2018-08-02 10:37:04 +02:00
storage usb: uas: add support for more quirk flags 2018-09-05 13:27:07 +02:00
typec usb/typec: fix kernel-doc notation warning for typec_match_altmode 2018-09-05 14:36:53 +02:00
usbip usb: usbip: remove redundant pointer ep 2018-07-13 15:41:55 +02:00
wusbcore usb: wusbcore: security: cast sizeof to int for comparison 2018-07-02 18:08:19 +02:00
Kconfig usb: select USB_COMMON for usb role switch config 2018-04-22 15:23:37 +02:00
Makefile usb: roles: Add Intel xHCI USB role switch driver 2018-03-22 13:49:27 +01:00
README
usb-skeleton.c usb: usb-skeleton: use irqsave() in USB's complete callback 2018-06-28 19:36:06 +09:00

README

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("hub_wq").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.