quoted

quoted

Hello

Below kmemleak was triggered with blktests nvme-tcp on latest
5.15.0-rc3, pls check it.

Please share the test number and the frequency to reproduce this...

Hi
I'm running the full blktests nvme-tcp[1] and it's 100% reproduced.

[1]
# nvme_trtype=tcp ./check nvme/

Yi, this does not happen with nvme_trtype=rdma? It looks like
we don't get to call cdev_device_del and del_gendisk, which means
we may have a referencing problem...

I'm wandering if this is a regression we can bisect to?

quoted

quoted

unreferenced object 0xffff8882bc8d6668 (size 8):
    comm "kworker/u26:2", pid 82, jiffies 4295107562 (age 2911.554s)
    hex dump (first 8 bytes):
      6e 67 31 6e 31 00 7b 7c                          ng1n1.{|
    backtrace:
      [<0000000046e1c456>] __kmalloc_track_caller+0x129/0x260
      [<00000000a8f7a3a1>] kvasprintf+0xa7/0x120
      [<0000000076a54cc5>] kobject_set_name_vargs+0x41/0x110
      [<00000000a569a16a>] dev_set_name+0x9b/0xd0
      [<00000000f793cc3d>] nvme_mpath_set_live+0x322/0x430 [nvme_core]
      [<000000001f948cbb>] nvme_mpath_add_disk+0x3ef/0x6a0 [nvme_core]
      [<00000000d405af45>] nvme_alloc_ns+0xeb1/0x1ae0 [nvme_core]
      [<000000002fd9b34d>] nvme_validate_or_alloc_ns+0x170/0x350 [nvme_core]
      [<000000009762df74>] nvme_scan_work+0x2dc/0x4b0 [nvme_core]
      [<000000007be5c512>] process_one_work+0x9a8/0x16b0
      [<000000002ae51314>] worker_thread+0x87/0xbf0
      [<0000000034c41079>] kthread+0x371/0x440
      [<0000000020c3a70f>] ret_from_fork+0x22/0x30
unreferenced object 0xffff8882d1509800 (size 512):
    comm "kworker/u26:2", pid 82, jiffies 4295107562 (age 2911.554s)
    hex dump (first 32 bytes):
      00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
      ff ff ff ff ff ff ff ff c0 b6 b7 97 ff ff ff ff  ................
    backtrace:
      [<00000000d6c8d6f1>] kmem_cache_alloc_trace+0x10b/0x220
      [<00000000e6493d28>] device_add+0xe08/0x1d10
      [<00000000aa40e6ce>] cdev_device_add+0xf1/0x150
      [<00000000142436f1>] nvme_cdev_add+0xf8/0x160 [nvme_core]
      [<00000000d948ccab>] nvme_mpath_set_live+0x347/0x430 [nvme_core]
      [<000000001f948cbb>] nvme_mpath_add_disk+0x3ef/0x6a0 [nvme_core]
      [<00000000d405af45>] nvme_alloc_ns+0xeb1/0x1ae0 [nvme_core]
      [<000000002fd9b34d>] nvme_validate_or_alloc_ns+0x170/0x350 [nvme_core]
      [<000000009762df74>] nvme_scan_work+0x2dc/0x4b0 [nvme_core]
      [<000000007be5c512>] process_one_work+0x9a8/0x16b0
      [<000000002ae51314>] worker_thread+0x87/0xbf0
      [<0000000034c41079>] kthread+0x371/0x440
      [<0000000020c3a70f>] ret_from_fork+0x22/0x30

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