[bug report] Oops: general protection fault observed with blktests nvme/fc nvme/058

[Yi Zhang]

Hi
I reproduced this Oops issue with blktests nvme/fc nvme/058 on the
latest linux-block/for-next .
Please help check it and let me know if you need any info/test, thanks.

[ 1188.305451] Oops: general protection fault, probably for
non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN NOPTI
[ 1188.316668] KASAN: null-ptr-deref in range
[0x0000000000000028-0x000000000000002f]
[ 1188.324246] CPU: 12 UID: 0 PID: 3504 Comm: kworker/u67:22 Kdump:
loaded Not tainted 6.19.0-rc2+ #2 PREEMPT(voluntary)
[ 1188.334936] Hardware name: Dell Inc. PowerEdge R6515/07PXPY, BIOS
2.21.1 09/24/2025
[ 1188.342589] Workqueue: nvmet-wq fcloop_tgt_fcprqst_done_work [nvme_fcloop]
[ 1188.349477] RIP: 0010:kasan_byte_accessible+0x15/0x30
[ 1188.354540] Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03
48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 4e e8 00 02 66 66 2e 0f 1f 84 00
00 00
[ 1188.373293] RSP: 0018:ffffc9000b247b00 EFLAGS: 00010286
[ 1188.378528] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 1188.385660] RDX: 0000000000000000 RSI: ffffffffb7f98667 RDI: dffffc0000000005
[ 1188.392794] RBP: 0000000000000028 R08: 0000000000000001 R09: 0000000000000000
[ 1188.399934] R10: ffffffffc13e8a04 R11: 0000000000000001 R12: ffffffffb7f98667
[ 1188.407068] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[ 1188.414200] FS:  0000000000000000(0000) GS:ffff8888656c4000(0000)
knlGS:0000000000000000
[ 1188.422293] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1188.428040] CR2: 000055c898cde0b8 CR3: 000000024d0ef000 CR4: 0000000000350ef0
[ 1188.435172] Call Trace:
[ 1188.437625]  <TASK>
[ 1188.439732]  __kasan_check_byte+0x13/0x50
[ 1188.443756]  lock_acquire.part.0+0x36/0x260
[ 1188.447947]  ? srso_return_thunk+0x5/0x5f
[ 1188.451967]  ? rcu_is_watching+0x15/0xb0
[ 1188.455902]  ? srso_return_thunk+0x5/0x5f
[ 1188.459923]  ? lock_acquire+0x10b/0x140
[ 1188.463777]  _raw_spin_lock+0x37/0x80
[ 1188.467448]  ? fcloop_tgt_fcprqst_done_work+0x104/0x200 [nvme_fcloop]
[ 1188.473896]  fcloop_tgt_fcprqst_done_work+0x104/0x200 [nvme_fcloop]
[ 1188.480170]  ? trace_workqueue_execute_start+0x13b/0x190
[ 1188.485493]  process_one_work+0xd8b/0x1320
[ 1188.489610]  ? __pfx_process_one_work+0x10/0x10
[ 1188.494148]  ? srso_return_thunk+0x5/0x5f
[ 1188.498178]  ? srso_return_thunk+0x5/0x5f
[ 1188.502198]  ? assign_work+0x16c/0x240
[ 1188.505955]  worker_thread+0x5f3/0xfe0
[ 1188.509717]  ? srso_return_thunk+0x5/0x5f
[ 1188.513734]  ? __kthread_parkme+0xb4/0x200
[ 1188.517847]  ? __pfx_worker_thread+0x10/0x10
[ 1188.522124]  kthread+0x3b4/0x770
[ 1188.525364]  ? srso_return_thunk+0x5/0x5f
[ 1188.529384]  ? local_clock_noinstr+0xd/0xe0
[ 1188.533582]  ? __pfx_kthread+0x10/0x10
[ 1188.537340]  ? __lock_release.isra.0+0x1a2/0x2c0
[ 1188.541972]  ? srso_return_thunk+0x5/0x5f
[ 1188.545990]  ? rcu_is_watching+0x15/0xb0
[ 1188.549926]  ? __pfx_kthread+0x10/0x10
[ 1188.553690]  ret_from_fork+0x4ce/0x710
[ 1188.557450]  ? __pfx_ret_from_fork+0x10/0x10
[ 1188.561732]  ? srso_return_thunk+0x5/0x5f
[ 1188.565748]  ? __switch_to+0x528/0xf50
[ 1188.569512]  ? __switch_to_asm+0x39/0x70
[ 1188.573447]  ? __pfx_kthread+0x10/0x10
[ 1188.577210]  ret_from_fork_asm+0x1a/0x30
[ 1188.581157]  </TASK>
[ 1188.583352] Modules linked in: nvme_fcloop nvmet_fc nvmet nvme_fc
nvme_fabrics platform_profile dell_wmi dell_smbios amd_atl
intel_rapl_msr sparse_keymap rfkill intel_rapl_common video amd64_edac
edac_mce_amd dcdbas kvm_amd cdc_ether vfat fat usbnet kvm mii
irqbypass mgag200 dell_wmi_descriptor wmi_bmof rapl i2c_algo_bit
pcspkr acpi_cpufreq ipmi_ssif i2c_piix4 ptdma k10temp i2c_smbus
acpi_power_meter ipmi_si acpi_ipmi ipmi_devintf ipmi_msghandler sg
fuse loop xfs sd_mod nvme ahci libahci ghash_clmulni_intel tg3
nvme_core libata ccp nvme_keyring nvme_auth mpt3sas hkdf raid_class
sp5100_tco scsi_transport_sas wmi sunrpc dm_mirror dm_region_hash
dm_log dm_mod nfnetlink [last unloaded: nvmet]

-- 
Best Regards,
  Yi Zhang