[bug report]kernel NULL pointer at siw_tx_hdt+0x128/0x978 [siw] with blktests nvmeof-mp/002

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Hello

I reproduced this issue with blktests nvmeof-mp/002 on 5.12.0-rc5 aarch64, pls help check it and let me know if you need any testing for it, thanks. 

[18381.922840] run blktests nvmeof-mp/002 at 2021-03-31 20:42:40
[18382.123208] null_blk: module loaded
[18382.345093] SoftiWARP attached
[18382.507549] nvmet: adding nsid 1 to subsystem nvme-test
[18382.536043] iwpm_register_pid: Unable to send a nlmsg (client = 2)
[18382.542985] nvmet_rdma: enabling port 1 (10.19.241.109:7777)
[18382.703578] nvmet: creating controller 1 for subsystem nvme-test for NQN nqn.2014-08.org.nvmexpress:uuid:a6ba6b82-f083-4df3-9ee2-cd3f635a8418.
[18382.717201] nvme nvme0: creating 32 I/O queues.
[18382.751581] nvme nvme0: mapped 32/0/0 default/read/poll queues.
[18382.768935] nvme nvme0: new ctrl: NQN "nvme-test", addr 10.19.241.109:7777
[18382.811275] device-mapper: multipath service-time: version 0.3.0 loaded
[18383.611572] EXT4-fs (dm-3): mounted filesystem without journal. Opts: (null). Quota mode: none.
[18383.620343] ext4 filesystem being mounted at /root/blktests/results/tmpdir.nvmeof-mp.002.pnM/mnt0 supports timestamps until 2038 (0x7fffffff)
[18411.156005] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030
[18411.156046] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030
[18411.164790] Mem abort info:
[18411.173564] Mem abort info:
[18411.173565]   ESR = 0x96000006
[18411.173567]   EC = 0x25: DABT (current EL), IL = 32 bits
[18411.173569]   SET = 0, FnV = 0
[18411.176349]   ESR = 0x96000006
[18411.179129]   EA = 0, S1PTW = 0
[18411.182170]   EC = 0x25: DABT (current EL), IL = 32 bits
[18411.187473] Data abort info:
[18411.190513]   SET = 0, FnV = 0
[18411.193558]   ISV = 0, ISS = 0x00000006
[18411.196685]   EA = 0, S1PTW = 0
[18411.201982]   CM = 0, WnR = 0
[18411.204853] Data abort info:
[18411.207893] user pgtable: 64k pages, 42-bit VAs, pgdp=00000009c33b0000
[18411.211714]   ISV = 0, ISS = 0x00000006
[18411.214846] [0000000000000030] pgd=0000000000000000
[18411.217800]   CM = 0, WnR = 0
[18411.220666] , p4d=0000000000000000
[18411.227184] user pgtable: 64k pages, 42-bit VAs, pgdp=00000009c33b0000
[18411.231005] , pud=0000000000000000
[18411.235873] [0000000000000030] pgd=0000000000000000
[18411.238826] , pmd=0000000000000000
[18411.242214] , p4d=0000000000000000
[18411.248733] 
[18411.252120] , pud=0000000000000000
[18411.256990] Internal error: Oops: 96000006 [#1] SMP
[18411.260376] , pmd=0000000000000000
[18411.263764] Modules linked in: ext4 mbcache jbd2 dm_service_time nvme_rdma
[18411.265247] 
[18411.268634]  nvme_fabrics nvme nvmet_rdma nvmet siw null_blk dm_multipath nvme_core rfkill rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod ib_umad target_core_mod vfat fat ib_iser ib_ipoib libiscsi scsi_transport_iscsi rdma_cm iw_cm ib_cm mlx4_ib ib_uverbs ib_core acpi_ipmi crct10dif_ce ghash_ce ipmi_ssif sha1_ce sbsa_gwdt ipmi_devintf ipmi_msghandler xgene_hwmon ip_tables xfs libcrc32c mlx4_en sr_mod cdrom sg ast drm_vram_helper drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm_ttm_helper ttm drm mlx4_core igb sha2_ce sha256_arm64 i2c_designware_platform ahci_platform i2c_algo_bit i2c_designware_core gpio_dwapb libahci_platform i2c_xgene_slimpro uas usb_storage dm_mirror dm_region_hash dm_log dm_mod [last unloaded: nvme_core]
[18411.351792] CPU: 13 PID: 19581 Comm: siw_tx/13 Not tainted 5.12.0-rc5 #1
[18411.368293] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
[18411.374287] pc : siw_tx_hdt+0x128/0x978 [siw]
[18411.378641] lr : siw_qp_sq_process+0xc4/0xa80 [siw]
[18411.383512] sp : fffffe001acafa90
[18411.386813] x29: fffffe001acafa90 x28: fffffc083f9a4238 
[18411.392114] x27: 0000000000000003 x26: 000000000000ef70 
[18411.397414] x25: 0000000000000003 x24: 0000000000000000 
[18411.402714] x23: 0000000000000000 x22: 0000000000000000 
[18411.408014] x21: fffffc083f9a4270 x20: fffffc083f9a41c8 
[18411.413313] x19: 0000000000000000 x18: 0000000000000000 
[18411.418612] x17: 0000000000000000 x16: 0000000000000000 
[18411.423912] x15: 0000000000000000 x14: 0000000000000000 
[18411.429211] x13: b6f8a80000001000 x12: fffffc093fe37000 
[18411.434511] x11: b6f8a80000000040 x10: 0000000000000001 
[18411.439810] x9 : 0000000000000000 x8 : 0000000000000000 
[18411.445110] x7 : 0000000000000014 x6 : 000000000000ffc8 
[18411.450409] x5 : fffffc083f9a4238 x4 : fffffe001acafc40 
[18411.455709] x3 : 0000000000000020 x2 : fffffc083f9a4238 
[18411.461009] x1 : fffffc083f9a4248 x0 : 0000000000000000 
[18411.466309] Call trace:
[18411.468743]  siw_tx_hdt+0x128/0x978 [siw]
[18411.472746]  siw_qp_sq_process+0xc4/0xa80 [siw]
[18411.477270]  siw_sq_resume+0x48/0x168 [siw]
[18411.481446]  siw_run_sq+0xc8/0x290 [siw]
[18411.485362]  kthread+0x114/0x118
[18411.488580]  ret_from_fork+0x10/0x18
[18411.492146] Code: 370800c1 f9403fe1 8b214c41 f9403c37 (f9401ae1) 
[18411.498237] ---[ end trace 67f55110d28671a3 ]---
[18411.502842] Kernel panic - not syncing: Oops: Fatal exception
[18411.508580] SMP: stopping secondary CPUs
[18412.537491] SMP: failed to stop secondary CPUs 11,13
[18412.542445] Kernel Offset: disabled
[18412.545920] CPU features: 0x00240002,61802008
[18412.550264] Memory Limit: none
[18412.553311] ---[ end Kernel panic - not syncing: Oops: Fatal exception ]---


Best Regards,
  Yi Zhang





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