[525870.649517] BUG: unable to handle kernel NULL pointer dereference at (null)
[525870.651577] IP: [<ffffffffc1529c3a>] qmt_free_lqe_gd+0xa/0x1f0 [lquota]
[525870.653399] PGD 0
[525870.654492] Oops: 0000 [#1] SMP
[525870.678528] CPU: 11 PID: 21026 Comm: ldlm_cn02_005 Kdump: loaded 3.10.0-1160.71.1.el7_lustre.x86_64 #1
[525870.711079] Call Trace:
[525870.712322] [<ffffffffc15220ef>] qmt_lvbo_free+0x6f/0x370 [lquota]
[525870.714101] [<ffffffffc18ebef3>] mdt_lvbo_free+0x123/0x140 [mdt]
[525870.715922] [<ffffffffc107d8f2>] ldlm_resource_putref+0x192/0x260 [ptlrpc]
[525870.717787] [<ffffffffc109efd7>] ldlm_request_cancel+0x447/0x7a0 [ptlrpc]
[525870.719620] [<ffffffffc10a3732>] ldlm_handle_cancel+0x232/0x2b0 [ptlrpc]
[525870.721417] [<ffffffffc10a3d58>] ldlm_cancel_handler+0x5a8/0x6f0 [ptlrpc]
[525870.723391] [<ffffffffc10d5f83>] ptlrpc_server_handle_request+0x253/0xc40 [ptlrpc]
[525870.727023] [<ffffffffc10dad7a>] ptlrpc_main+0xc4a/0x1cb0 [ptlrpc]
[525870.733704] [<ffffffff8b6c5f91>] kthread+0xd1/0xe0