Centos-kernel-stream-10

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CKI KWF Bot 79b40df421 Merge: mei: bus: access mei_device under device_lock on cleanup

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/3039

JIRA: https://redhat.atlassian.net/browse/RHEL-222295

commit f112ea910e554d58b4b39a4492b7d302f0f4204f
Author: Alexander Usyskin <alexander.usyskin@intel.com>
Date:   Sun Jul 5 18:12:59 2026 +0300

    mei: bus: access mei_device under device_lock on cleanup

    Fix couple of problems in mei_cl_bus_dev_release():

    mei_cl_flush_queues() is running without lock.
    bus->file_list access after mei_dev_bus_put(bus) can become a
    use-after-free if this was the last reference to bus.

    Protect queues cleanup and WARN traversal by device lock there
    to avoid the concurrent access problems.
    Move WARN traversal before mei_dev_bus_put(bus).

    This file uses bus variable name for mei_device, adjust
    code of mei_cl_bus_dev_release() to use bus variable too.

    Cc: stable <stable@kernel.org>
    Fixes: 35e8a426b16a ("mei: bus: Check for still connected devices in mei_cl_bus_dev_release()")
    Reviewed-by: Menachem Adin <menachem.adin@intel.com>
    Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
    Link: https://patch.msgid.link/20260705151259.3054795-1-alexander.usyskin@intel.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Steve Best <sbest@redhat.com>

Approved-by: Tony Camuso <tcamuso@redhat.com>
Approved-by: David Arcari <darcari@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>