In the Linux kernel, the following vulnerability has been resolved:

bus: mhi: host: Fix race between unprepare and queue_buf

A client driver may use mhi_unprepare_from_transfer() to quiesce
incoming data during the client driver's tear down. The client driver
might also be processing data at the same time, resulting in a call to
mhi_queue_buf() which will invoke mhi_gen_tre(). If mhi_gen_tre() runs
after mhi_unprepare_from_transfer() has torn down the channel, a panic
will occur due to an invalid dereference leading to a page fault.

This occurs because mhi_gen_tre() does not verify the channel state
after locking it. Fix this by having mhi_gen_tre() confirm the channel
state is valid, or return error to avoid accessing deinitialized data.

[mani: added stable tag]

https://git.kernel.org/stable/c/0686a818d77a431fc3ba2fab4b46bbb04e8c9380

https://git.kernel.org/stable/c/178e5657c8fd285125cc6743a81b513bce099760

https://git.kernel.org/stable/c/3e7ecf181cbdde9753204ada3883ca1704d8702b

https://git.kernel.org/stable/c/5f084993c90d9d0b4a52a349ede5120f992a7ca1

https://git.kernel.org/stable/c/a77955f7704b2a00385e232cbcc1cb06b5c7a425

https://git.kernel.org/stable/c/ee1fce83ed56450087309b9b74ad9bcb2b010fa6