Hello I found this failure on the latest linux tree, and it cannot be reproduced on v6.4, it should be one regression recently merged to linux tree after v6.4. I check the commit recently merged after v6.4, and found below commit touched the related code, not sure if it was introduced by this commit. commit 959ffef13bac792e4e2e3321d6e2bd2b00c0f5f9 Author: Chaitanya Kulkarni <kch@xxxxxxxxxx> Date: Thu Jun 1 23:47:42 2023 -0700 nvme-fabrics: open code __nvmf_host_find() [ 524.706158] run blktests nvme/004 at 2023-06-27 02:00:43 [ 524.779499] loop0: detected capacity change from 0 to 2097152 [ 524.790075] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 524.810743] nvme_fabrics: found same hostid 08dfb4e9-d246-4450-afb6-bc6249f9dc96 but different hostnqn nqn.2014-08.org.nvmexpress:uuid:4c4c4544-005a-3010-804b-b4c04f4e3232 [ 525.346603] run blktests nvme/006 at 2023-06-27 02:00:44 [ 525.380421] loop0: detected capacity change from 0 to 2097152 [ 525.391846] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 525.901516] run blktests nvme/007 at 2023-06-27 02:00:45 [ 525.934980] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 526.412792] run blktests nvme/008 at 2023-06-27 02:00:45 [ 526.446070] loop0: detected capacity change from 0 to 2097152 [ 526.456790] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 526.471220] nvme_fabrics: found same hostid 1cb04df4-a83c-4257-84ad-aa5dab3e961c but different hostnqn nqn.2014-08.org.nvmexpress:uuid:4c4c4544-005a-3010-804b-b4c04f4e3232 [ 527.014108] run blktests nvme/009 at 2023-06-27 02:00:46 [ 527.045095] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 527.059680] nvme_fabrics: found same hostid 1584c36e-4a26-4408-a7d6-5608c0197141 but different hostnqn nqn.2014-08.org.nvmexpress:uuid:4c4c4544-005a-3010-804b-b4c04f4e3232 -- Best Regards, Yi Zhang