In the Linux kernel, the following vulnerability has been resolved:
usb: core: hcd: fix possible deadlock in rh control transfers
>From within the SCSI error handler memory allocations must not
trigger IO. Handling errors in UAS and the storage driver may
involve resetting a device. The thread doing the reset itself
relies on VM magic.
However, that is insufficient, as resetting a device involves resuming it. Resumption as well as resetting involves conrol transfers to the parent of the device to be reset. That may be a root hub.
Hence usbcore must heed the flags passed
to usb_submit_urb() processing control transfers to root hubs. The problem exist since the storage driver has been merged.
Ссылки 3
https://git.kernel.org/stable/c/549672a3fb6b36ea408238f89ecf9f41d2da6225
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d5559f43d76b398392b26a15cbc16d731969cd1c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fff917c85d37a294397c5440a795591ca9d6b602
416baaa9-dc9f-4396-8d5f-8c081fb06d67