CVE-2025-23151

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]