[bug report] blktests nvme-fc nvme/003 lead kernel NULL pointer

Thu Apr 6 01:48:33 PDT 2023

Hello
Running blktests nvme-fc tests on the latest linux-block/for-next
triggered below NULL pointer, pls help check it and let me know if you
need any info/test for it, thanks.

# nvme_trtype=fc ./check nvme/003
nvme/003 (test if we're sending keep-alives to a discovery controller)
    runtime  10.337s  ...
WARNING: Test did not clean up fc device: nvme4

[ 2825.578026] loop: module loaded
[ 2825.608636] run blktests nvme/003 at 2023-04-06 04:29:02
[ 2825.664353] nvmet: adding nsid 1 to subsystem blktests-subsystem-1
[ 2825.718843] nvme nvme2: NVME-FC{0}: create association : host wwpn
0x20001100aa000002  rport wwpn 0x20001100aa000001: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2825.734930] (NULL device *): {0:0} Association created
[ 2825.740727] nvmet: creating discovery controller 1 for subsystem
nqn.2014-08.org.nvmexpress.discovery for NQN
nqn.2014-08.org.nvmexpress:uuid:4c4c4544-0044-4c10-8059-b5c04f4c4732.
[ 2825.758832] nvme nvme2: NVME-FC{0}: controller connect complete
[ 2825.765498] nvme nvme2: NVME-FC{0}: new ctrl: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2825.778363] nvme nvme3: NVME-FC{1}: create association : host wwpn
0x20001100aa000002  rport wwpn 0x20001100aa000001: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2825.794448] (NULL device *): {0:1} Association created
[ 2825.800272] nvmet: creating discovery controller 2 for subsystem
nqn.2014-08.org.nvmexpress.discovery for NQN
nqn.2014-08.org.nvmexpress:uuid:4c4c4544-0044-4c10-8059-b5c04f4c4732.
[ 2825.818336] nvme nvme3: NVME-FC{1}: controller connect complete
[ 2825.825004] nvme nvme3: NVME-FC{1}: new ctrl: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2825.838044] nvme nvme4: NVME-FC{2}: create association : host wwpn
0x20001100aa000002  rport wwpn 0x20001100aa000001: NQN
"blktests-subsystem-1"
[ 2825.852578] (NULL device *): {0:2} Association created
[ 2825.858388] nvmet: creating nvm controller 3 for subsystem
blktests-subsystem-1 for NQN
nqn.2014-08.org.nvmexpress:uuid:4c4c4544-0044-4c10-8059-b5c04f4c4732.
[ 2825.875227] nvme nvme4: NVME-FC{2}: controller connect complete
[ 2825.881896] nvme nvme4: NVME-FC{2}: new ctrl: NQN "blktests-subsystem-1"
[ 2825.889976] nvme nvme3: Removing ctrl: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2825.911611] (NULL device *): {0:1} Association deleted
[ 2825.917363] (NULL device *): {0:1} Association freed
[ 2825.922913] (NULL device *): Disconnect LS failed: No Association
[ 2835.847208] nvme nvme2: Removing ctrl: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2835.870520] (NULL device *): {0:0} Association deleted
[ 2835.876270] (NULL device *): {0:0} Association freed
[ 2835.881820] (NULL device *): Disconnect LS failed: No Association
[ 2835.890176] nvme nvme4: rescanning namespaces.
[ 2835.921308] nvme nvme2: NVME-FC{0}: create association : host wwpn
0x20001100aa000002  rport wwpn 0x20001100aa000001: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2835.937389] (NULL device *): {0:0} Association created
[ 2835.943193] nvmet: connect request for invalid subsystem
nqn.2014-08.org.nvmexpress.discovery!
[ 2835.952848] nvme nvme2: Connect Invalid Data Parameter, subsysnqn
"nqn.2014-08.org.nvmexpress.discovery"
[ 2835.955520] nvme nvme4: NVME-FC{2}: io failed due to lldd error 6
[ 2835.963481] nvme nvme2: NVME-FC{0}: reset: Reconnect attempt failed (16770)
[ 2835.970290] nvme nvme4: NVME-FC{2}: transport association event:
transport detected io error
[ 2835.978027] nvme nvme2: NVME-FC{0}: reconnect failure
[ 2835.978047] nvme nvme2: Removing ctrl: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2835.978083] nvme nvme2: NVME-FC{0}: new ctrl: NQN
"nqn.2014-08.org.nvmexpress.discovery"
[ 2835.987481] nvme nvme4: NVME-FC{2}: resetting controller
[ 2836.017514] (NULL device *): {0:2} Association deleted
[ 2836.018502] (NULL device *): {0:0} Association deleted
[ 2836.023271] (NULL device *): {0:2} Association freed
[ 2836.029012] (NULL device *): {0:0} Association freed
[ 2836.034556] (NULL device *): Disconnect LS failed: No Association
[ 2836.058511] (NULL device *): Disconnect LS failed: No Association
[ 2836.059556] nvme nvme4: NVME-FC{2}: create association : host wwpn
0x20001100aa000002  rport wwpn 0x20001100aa000001: NQN
"blktests-subsystem-1"
[ 2836.069844] nvme nvme4: Removing ctrl: NQN "blktests-subsystem-1"
[ 2836.079837] (NULL device *): {0:0} Association created
[ 2836.092403] nvme nvme4: Connect command failed: host path error
[ 2836.105501] (NULL device *): {0:0} Association deleted
[ 2836.111259] (NULL device *): {0:0} Association freed
[ 2836.116818] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 2836.124579] #PF: supervisor read access in kernel mode
[ 2836.130312] #PF: error_code(0x0000) - not-present page
[ 2836.136045] PGD 0 P4D 0
[ 2836.138872] Oops: 0000 [#1] PREEMPT SMP PTI
[ 2836.143542] CPU: 0 PID: 20 Comm: kworker/0:1 Kdump: loaded Not
tainted 6.3.0-rc5+ #2
[ 2836.152187] Hardware name: Dell Inc. PowerEdge R730xd/ɲ?Pow, BIOS
2.16.0 07/20/2022
[ 2836.160829] Workqueue: events nvme_fc_handle_ls_rqst_work [nvme_fc]
[ 2836.167842] RIP: 0010:memcpy_erms+0x6/0x10
[ 2836.172423] Code: c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 cc cc
cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 f8
48 89 d1 <f3> a4 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90
90 90
[ 2836.193372] RSP: 0018:ffffba2a80177df8 EFLAGS: 00010287
[ 2836.199195] RAX: ffff9d280e083fa0 RBX: ffff9d280e083fc0 RCX: 0000000000000018
[ 2836.207159] RDX: 0000000000000018 RSI: 0000000000000000 RDI: ffff9d280e083fa0
[ 2836.215124] RBP: ffff9d29a9b89400 R08: ffff9d29a9b89ab8 R09: ffff9d29a9b89ab8
[ 2836.223088] R10: 0000000000000007 R11: 0000000000000007 R12: ffff9d280e7d8000
[ 2836.231052] R13: ffff9d29869c5780 R14: 0800000002000000 R15: 0100000020000000
[ 2836.239016] FS:  0000000000000000(0000) GS:ffff9d2977c00000(0000)
knlGS:0000000000000000
[ 2836.248048] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2836.254461] CR2: 0000000000000000 CR3: 00000002fc220002 CR4: 00000000001706f0
[ 2836.262424] Call Trace:
[ 2836.265151]  <TASK>
[ 2836.267492]  fcloop_t2h_xmt_ls_rsp+0x3a/0xc0 [nvme_fcloop]
[ 2836.273629]  nvme_fc_xmt_ls_rsp+0x4f/0x90 [nvme_fc]
[ 2836.279085]  nvme_fc_handle_ls_rqst_work+0xbc/0x1e0 [nvme_fc]
[ 2836.285510]  process_one_work+0x1e5/0x3f0
[ 2836.289992]  ? __pfx_worker_thread+0x10/0x10
[ 2836.294760]  worker_thread+0x50/0x3a0
[ 2836.298850]  ? __pfx_worker_thread+0x10/0x10
[ 2836.303616]  kthread+0xd9/0x100
[ 2836.307122]  ? __pfx_kthread+0x10/0x10
[ 2836.311307]  ret_from_fork+0x2c/0x50
[ 2836.315306]  </TASK>
[ 2836.317743] Modules linked in: loop nvme_fcloop nvmet_fc nvmet
nvme_fc nvme_fabrics sunrpc intel_rapl_msr intel_rapl_common sb_edac
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel mgag200
dell_wmi_descriptor i2c_algo_bit ledtrig_audio kvm drm_shmem_helper
rfkill drm_kms_helper ipmi_ssif video iTCO_wdt iTCO_vendor_support
cdc_ether ipmi_si irqbypass usbnet syscopyarea rapl sysfillrect pcspkr
lpc_ich ipmi_devintf intel_cstate mii dcdbas mei_me mei intel_uncore
ipmi_msghandler sysimgblt mxm_wmi acpi_power_meter vfat fat fuse drm
xfs libcrc32c sd_mod sg ahci crct10dif_pclmul crc32_pclmul libahci
crc32c_intel nvme ghash_clmulni_intel nvme_core libata tg3
megaraid_sas nvme_common t10_pi wmi dm_mirror dm_region_hash dm_log
dm_mod
[ 2836.390183] CR2: 0000000000000000

-- 
Best Regards,
  Yi Zhang