Comment 0 for bug 1856949

    [598428.945633] BUG: kernel NULL pointer dereference, address: 0000000000000038
    ...
    [598428.945749] Workqueue: cifsoplockd cifs_oplock_break [cifs]
    [598428.945793] RIP: 0010:smb2_push_mandatory_locks+0xd6/0x5a0 [cifs]
    ...
    [598428.945834] Call Trace:
    [598428.945870] ? cifs_revalidate_mapping+0x45/0x90 [cifs]
    [598428.945901] cifs_oplock_break+0x13d/0x450 [cifs]
    [598428.945909] process_one_work+0x1db/0x380
    [598428.945914] worker_thread+0x4d/0x400
    [598428.945921] kthread+0x104/0x140
    [598428.945925] ? process_one_work+0x380/0x380
    [598428.945931] ? kthread_park+0x80/0x80
    [598428.945937] ret_from_fork+0x35/0x40