nbd, sysfs: cannot create duplicate filename '/dev/block/43:0'

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Hi,

so I enabled CONFIG_BLK_DEV_NBD=y on a test box here and I'm getting the
below.

Kernel is Linus' branch from today + a couple of unrelated arch/x86/ patches.

.config is attached.

Thx.

...
[    4.501239] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    4.507878] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    4.508866] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    4.508866] Call Trace:
[    4.508866]  <TASK>
[    4.508866]  dump_stack_lvl+0x57/0x7d
[    4.508866]  sysfs_warn_dup.cold+0x17/0x24
[    4.508866]  sysfs_do_create_link_sd+0xc0/0xd0
[    4.508866]  device_add+0x5b4/0x930
[    4.508866]  ? dev_set_name+0x43/0x50
[    4.508866]  device_add_disk+0xd5/0x370
[    4.508866]  nbd_dev_add+0x2b0/0x3a0
[    4.508866]  ? node_dev_init+0xa9/0xa9
[    4.508866]  nbd_init+0x157/0x160
[    4.508866]  do_one_initcall+0x5b/0x300
[    4.508866]  ? rcu_read_lock_sched_held+0x3f/0x70
[    4.508866]  kernel_init_freeable+0x184/0x1ce
[    4.508866]  ? rest_init+0x260/0x260
[    4.508866]  kernel_init+0x16/0x120
[    4.508866]  ret_from_fork+0x22/0x30
[    4.584022] tsc: Refined TSC clocksource calibration: 3591.342 MHz
[    4.508866]  </TASK>
[    4.590606] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x33c46016c57, max_idle_ns: 440795207857 ns
[    4.595335] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    4.609336] clocksource: Switched to clocksource tsc
[    4.609338] CPU: 5 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    4.609797] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    4.609797] Call Trace:
[    4.609797]  <TASK>
[    4.609797]  dump_stack_lvl+0x57/0x7d
[    4.609797]  sysfs_warn_dup.cold+0x17/0x24
[    4.609797]  sysfs_do_create_link_sd+0xc0/0xd0
[    4.609797]  device_add+0x5b4/0x930
[    4.609797]  ? dev_set_name+0x43/0x50
[    4.609797]  device_add_disk+0xd5/0x370
[    4.609797]  nbd_dev_add+0x2b0/0x3a0
[    4.609797]  ? node_dev_init+0xa9/0xa9
[    4.609797]  nbd_init+0x157/0x160
[    4.609797]  do_one_initcall+0x5b/0x300
[    4.609797]  ? rcu_read_lock_sched_held+0x3f/0x70
[    4.609797]  kernel_init_freeable+0x184/0x1ce
[    4.609797]  ? rest_init+0x260/0x260
[    4.609797]  kernel_init+0x16/0x120
[    4.609797]  ret_from_fork+0x22/0x30
[    4.609797]  </TASK>
[    4.699735] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    4.706887] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    4.707815] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    4.707815] Call Trace:
[    4.707815]  <TASK>
[    4.707815]  dump_stack_lvl+0x57/0x7d
[    4.707815]  sysfs_warn_dup.cold+0x17/0x24
[    4.707815]  sysfs_do_create_link_sd+0xc0/0xd0
[    4.707815]  device_add+0x5b4/0x930
[    4.707815]  ? dev_set_name+0x43/0x50
[    4.707815]  device_add_disk+0xd5/0x370
[    4.707815]  nbd_dev_add+0x2b0/0x3a0
[    4.707815]  ? node_dev_init+0xa9/0xa9
[    4.707815]  nbd_init+0x157/0x160
[    4.707815]  do_one_initcall+0x5b/0x300
[    4.707815]  ? rcu_read_lock_sched_held+0x3f/0x70
[    4.707815]  kernel_init_freeable+0x184/0x1ce
[    4.707815]  ? rest_init+0x260/0x260
[    4.707815]  kernel_init+0x16/0x120
[    4.707815]  ret_from_fork+0x22/0x30
[    4.707815]  </TASK>
[    4.798004] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    4.805074] CPU: 5 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    4.806045] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    4.806045] Call Trace:
[    4.806045]  <TASK>
[    4.806045]  dump_stack_lvl+0x57/0x7d
[    4.806045]  sysfs_warn_dup.cold+0x17/0x24
[    4.806045]  sysfs_do_create_link_sd+0xc0/0xd0
[    4.806045]  device_add+0x5b4/0x930
[    4.806045]  ? dev_set_name+0x43/0x50
[    4.806045]  device_add_disk+0xd5/0x370
[    4.806045]  nbd_dev_add+0x2b0/0x3a0
[    4.806045]  ? node_dev_init+0xa9/0xa9
[    4.806045]  nbd_init+0x157/0x160
[    4.806045]  do_one_initcall+0x5b/0x300
[    4.806045]  ? rcu_read_lock_sched_held+0x3f/0x70
[    4.806045]  kernel_init_freeable+0x184/0x1ce
[    4.806045]  ? rest_init+0x260/0x260
[    4.806045]  kernel_init+0x16/0x120
[    4.806045]  ret_from_fork+0x22/0x30
[    4.806045]  </TASK>
[    4.896273] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    4.903350] CPU: 5 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    4.904321] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    4.904321] Call Trace:
[    4.904321]  <TASK>
[    4.904321]  dump_stack_lvl+0x57/0x7d
[    4.904321]  sysfs_warn_dup.cold+0x17/0x24
[    4.904321]  sysfs_do_create_link_sd+0xc0/0xd0
[    4.904321]  device_add+0x5b4/0x930
[    4.904321]  ? dev_set_name+0x43/0x50
[    4.904321]  device_add_disk+0xd5/0x370
[    4.904321]  nbd_dev_add+0x2b0/0x3a0
[    4.904321]  ? node_dev_init+0xa9/0xa9
[    4.904321]  nbd_init+0x157/0x160
[    4.904321]  do_one_initcall+0x5b/0x300
[    4.904321]  ? rcu_read_lock_sched_held+0x3f/0x70
[    4.904321]  kernel_init_freeable+0x184/0x1ce
[    4.904321]  ? rest_init+0x260/0x260
[    4.904321]  kernel_init+0x16/0x120
[    4.904321]  ret_from_fork+0x22/0x30
[    4.904321]  </TASK>
[    4.993677] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.000739] CPU: 5 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.001711] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.001711] Call Trace:
[    5.001711]  <TASK>
[    5.001711]  dump_stack_lvl+0x57/0x7d
[    5.001711]  sysfs_warn_dup.cold+0x17/0x24
[    5.001711]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.001711]  device_add+0x5b4/0x930
[    5.001711]  ? dev_set_name+0x43/0x50
[    5.001711]  device_add_disk+0xd5/0x370
[    5.001711]  nbd_dev_add+0x2b0/0x3a0
[    5.001711]  ? node_dev_init+0xa9/0xa9
[    5.001711]  nbd_init+0x157/0x160
[    5.001711]  do_one_initcall+0x5b/0x300
[    5.001711]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.001711]  kernel_init_freeable+0x184/0x1ce
[    5.001711]  ? rest_init+0x260/0x260
[    5.001711]  kernel_init+0x16/0x120
[    5.001711]  ret_from_fork+0x22/0x30
[    5.001711]  </TASK>
[    5.090612] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.097295] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.098240] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.098240] Call Trace:
[    5.098240]  <TASK>
[    5.098240]  dump_stack_lvl+0x57/0x7d
[    5.098240]  sysfs_warn_dup.cold+0x17/0x24
[    5.098240]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.098240]  device_add+0x5b4/0x930
[    5.098240]  ? dev_set_name+0x43/0x50
[    5.098240]  device_add_disk+0xd5/0x370
[    5.098240]  nbd_dev_add+0x2b0/0x3a0
[    5.098240]  ? node_dev_init+0xa9/0xa9
[    5.098240]  nbd_init+0x157/0x160
[    5.098240]  do_one_initcall+0x5b/0x300
[    5.098240]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.098240]  kernel_init_freeable+0x184/0x1ce
[    5.098240]  ? rest_init+0x260/0x260
[    5.098240]  kernel_init+0x16/0x120
[    5.098240]  ret_from_fork+0x22/0x30
[    5.098240]  </TASK>
[    5.179303] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.185944] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.186930] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.186930] Call Trace:
[    5.186930]  <TASK>
[    5.186930]  dump_stack_lvl+0x57/0x7d
[    5.186930]  sysfs_warn_dup.cold+0x17/0x24
[    5.186930]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.186930]  device_add+0x5b4/0x930
[    5.186930]  ? dev_set_name+0x43/0x50
[    5.186930]  device_add_disk+0xd5/0x370
[    5.186930]  nbd_dev_add+0x2b0/0x3a0
[    5.186930]  ? node_dev_init+0xa9/0xa9
[    5.186930]  nbd_init+0x157/0x160
[    5.186930]  do_one_initcall+0x5b/0x300
[    5.186930]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.186930]  kernel_init_freeable+0x184/0x1ce
[    5.186930]  ? rest_init+0x260/0x260
[    5.186930]  kernel_init+0x16/0x120
[    5.186930]  ret_from_fork+0x22/0x30
[    5.186930]  </TASK>
[    5.267928] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.274577] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.275554] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.275554] Call Trace:
[    5.275554]  <TASK>
[    5.275554]  dump_stack_lvl+0x57/0x7d
[    5.275554]  sysfs_warn_dup.cold+0x17/0x24
[    5.275554]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.275554]  device_add+0x5b4/0x930
[    5.275554]  ? dev_set_name+0x43/0x50
[    5.275554]  device_add_disk+0xd5/0x370
[    5.275554]  nbd_dev_add+0x2b0/0x3a0
[    5.275554]  ? node_dev_init+0xa9/0xa9
[    5.275554]  nbd_init+0x157/0x160
[    5.275554]  do_one_initcall+0x5b/0x300
[    5.275554]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.275554]  kernel_init_freeable+0x184/0x1ce
[    5.275554]  ? rest_init+0x260/0x260
[    5.275554]  kernel_init+0x16/0x120
[    5.275554]  ret_from_fork+0x22/0x30
[    5.275554]  </TASK>
[    5.356536] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.363177] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.364163] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.364163] Call Trace:
[    5.364163]  <TASK>
[    5.364163]  dump_stack_lvl+0x57/0x7d
[    5.364163]  sysfs_warn_dup.cold+0x17/0x24
[    5.364163]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.364163]  device_add+0x5b4/0x930
[    5.364163]  ? dev_set_name+0x43/0x50
[    5.364163]  device_add_disk+0xd5/0x370
[    5.364163]  nbd_dev_add+0x2b0/0x3a0
[    5.364163]  ? node_dev_init+0xa9/0xa9
[    5.364163]  nbd_init+0x157/0x160
[    5.364163]  do_one_initcall+0x5b/0x300
[    5.364163]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.364163]  kernel_init_freeable+0x184/0x1ce
[    5.364163]  ? rest_init+0x260/0x260
[    5.364163]  kernel_init+0x16/0x120
[    5.364163]  ret_from_fork+0x22/0x30
[    5.364163]  </TASK>
[    5.445097] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.451747] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.452720] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.452720] Call Trace:
[    5.452720]  <TASK>
[    5.452720]  dump_stack_lvl+0x57/0x7d
[    5.452720]  sysfs_warn_dup.cold+0x17/0x24
[    5.452720]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.452720]  device_add+0x5b4/0x930
[    5.452720]  ? dev_set_name+0x43/0x50
[    5.452720]  device_add_disk+0xd5/0x370
[    5.452720]  nbd_dev_add+0x2b0/0x3a0
[    5.452720]  ? node_dev_init+0xa9/0xa9
[    5.452720]  nbd_init+0x157/0x160
[    5.452720]  do_one_initcall+0x5b/0x300
[    5.452720]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.452720]  kernel_init_freeable+0x184/0x1ce
[    5.452720]  ? rest_init+0x260/0x260
[    5.452720]  kernel_init+0x16/0x120
[    5.452720]  ret_from_fork+0x22/0x30
[    5.452720]  </TASK>
[    5.533707] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.540359] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.541340] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.541340] Call Trace:
[    5.541340]  <TASK>
[    5.541340]  dump_stack_lvl+0x57/0x7d
[    5.541340]  sysfs_warn_dup.cold+0x17/0x24
[    5.541340]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.541340]  device_add+0x5b4/0x930
[    5.541340]  ? dev_set_name+0x43/0x50
[    5.541340]  device_add_disk+0xd5/0x370
[    5.541340]  nbd_dev_add+0x2b0/0x3a0
[    5.541340]  ? node_dev_init+0xa9/0xa9
[    5.541340]  nbd_init+0x157/0x160
[    5.541340]  do_one_initcall+0x5b/0x300
[    5.541340]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.541340]  kernel_init_freeable+0x184/0x1ce
[    5.541340]  ? rest_init+0x260/0x260
[    5.541340]  kernel_init+0x16/0x120
[    5.541340]  ret_from_fork+0x22/0x30
[    5.541340]  </TASK>
[    5.622295] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.628929] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.629916] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.629916] Call Trace:
[    5.629916]  <TASK>
[    5.629916]  dump_stack_lvl+0x57/0x7d
[    5.629916]  sysfs_warn_dup.cold+0x17/0x24
[    5.629916]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.629916]  device_add+0x5b4/0x930
[    5.629916]  ? dev_set_name+0x43/0x50
[    5.629916]  device_add_disk+0xd5/0x370
[    5.629916]  nbd_dev_add+0x2b0/0x3a0
[    5.629916]  ? node_dev_init+0xa9/0xa9
[    5.629916]  nbd_init+0x157/0x160
[    5.629916]  do_one_initcall+0x5b/0x300
[    5.629916]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.629916]  kernel_init_freeable+0x184/0x1ce
[    5.629916]  ? rest_init+0x260/0x260
[    5.629916]  kernel_init+0x16/0x120
[    5.629916]  ret_from_fork+0x22/0x30
[    5.629916]  </TASK>
[    5.710887] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.717528] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.718511] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.718511] Call Trace:
[    5.718511]  <TASK>
[    5.718511]  dump_stack_lvl+0x57/0x7d
[    5.718511]  sysfs_warn_dup.cold+0x17/0x24
[    5.718511]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.718511]  device_add+0x5b4/0x930
[    5.718511]  ? dev_set_name+0x43/0x50
[    5.718511]  device_add_disk+0xd5/0x370
[    5.718511]  nbd_dev_add+0x2b0/0x3a0
[    5.718511]  ? node_dev_init+0xa9/0xa9
[    5.718511]  nbd_init+0x157/0x160
[    5.718511]  do_one_initcall+0x5b/0x300
[    5.718511]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.718511]  kernel_init_freeable+0x184/0x1ce
[    5.718511]  ? rest_init+0x260/0x260
[    5.718511]  kernel_init+0x16/0x120
[    5.718511]  ret_from_fork+0x22/0x30
[    5.718511]  </TASK>
[    5.799465] sysfs: cannot create duplicate filename '/dev/block/43:0'
[    5.806100] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0+ #1
[    5.807088] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A13 05/11/2014
[    5.807088] Call Trace:
[    5.807088]  <TASK>
[    5.807088]  dump_stack_lvl+0x57/0x7d
[    5.807088]  sysfs_warn_dup.cold+0x17/0x24
[    5.807088]  sysfs_do_create_link_sd+0xc0/0xd0
[    5.807088]  device_add+0x5b4/0x930
[    5.807088]  ? dev_set_name+0x43/0x50
[    5.807088]  device_add_disk+0xd5/0x370
[    5.807088]  nbd_dev_add+0x2b0/0x3a0
[    5.807088]  ? node_dev_init+0xa9/0xa9
[    5.807088]  nbd_init+0x157/0x160
[    5.807088]  do_one_initcall+0x5b/0x300
[    5.807088]  ? rcu_read_lock_sched_held+0x3f/0x70
[    5.807088]  kernel_init_freeable+0x184/0x1ce
[    5.807088]  ? rest_init+0x260/0x260
[    5.807088]  kernel_init+0x16/0x120
[    5.807088]  ret_from_fork+0x22/0x30
[    5.807088]  </TASK>
[    5.887611] megasas: 07.719.03.00-rc1
[    5.891571] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[    5.898195] ahci 0000:00:1f.2: version 3.0
[    5.903171] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x3 impl SATA mode
[    5.911473] ahci 0000:00:1f.2: flags: 64bit ncq sntf pm led clo pio slum part ems apst 
[    5.924018] scsi host0: ahci
[    5.928042] scsi host1: ahci
[    5.932574] scsi host2: ahci
[    5.937278] scsi host3: ahci
[    5.941884] scsi host4: ahci
[    5.946452] scsi host5: ahci
[    5.950364] ata1: SATA max UDMA/133 abar m2048@0xf3326000 port 0xf3326100 irq 32
[    5.958491] ata2: SATA max UDMA/133 abar m2048@0xf3326000 port 0xf3326180 irq 32
[    5.966476] ata3: DUMMY
[    5.969468] ata4: DUMMY
[    5.972465] ata5: DUMMY
[    5.975459] ata6: DUMMY

...

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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