blktests failures with v6.10 kernel

[Shinichiro Kawasaki]

Hi all,

I ran the latest blktests (git hash: f79783b44a5b) with the v6.10 kernel. Also I
checked the CKI project run results. In total, four failures were observed, as
listed below.

The nvme/050 failure observed with the kernel v6.10-rc1 [1] was fixed and no
longer observed. Good.

[1] https://lore.kernel.org/linux-block/wnucs5oboi4flje5yvtea7puvn6zzztcnlrfz3lpzlwgblrxgw@7wvqdzioejgl

List of failures
================
#1: nvme/041 (fc transport)
#2: dm/002
#3: srp/002 (siw driver)
#4: nbd/001,002 (CKI failure)

Failure description
===================

#1: nvme/041 (fc transport)

   With the trtype=fc configuration, nvme/041 fails:

  nvme/041 (Create authenticated connections)                  [failed]
      runtime  2.677s  ...  4.823s
      --- tests/nvme/041.out      2023-11-29 12:57:17.206898664 +0900
      +++ /home/shin/Blktests/blktests/results/nodev/nvme/041.out.bad     2024-03-19 14:50:56.399101323 +0900
      @@ -2,5 +2,5 @@
       Test unauthenticated connection (should fail)
       disconnected 0 controller(s)
       Test authenticated connection
      -disconnected 1 controller(s)
      +disconnected 0 controller(s)
       Test complete

   nvme/044 had same failure symptom until the kernel v6.9. A solution was
   suggested and discussed in Feb/2024 [2].

   [2] https://lore.kernel.org/linux-nvme/20240221132404.6311-1-dwagner@suse.de/

#2: dm/002

   When udev accesses the test target dm-dust device, "dmsetup remove" by the
   test case fails. A fix patch for blktests is posted [3].

   [3] https://lore.kernel.org/linux-block/20240719042318.265227-1-shinichiro.kawasaki@wdc.com/

#3: srp/002 (siw driver)

   During the fix confirmation work of srp/002 hang with rxe driver, KASAN slab-
   use-after-free was observed with siw driver [4]. Bart identified the resource
   freed under use (thanks!). His kernel fix patch is queued for v6.11-rc1 [5].

   [4] https://lore.kernel.org/linux-rdma/5prftateosuvgmosryes4lakptbxccwtx7yajoicjhudt7gyvp@w3f6nqdvurir/
   [5] https://lore.kernel.org/linux-rdma/20240605145117.397751-6-bvanassche@acm.org/

#4: nbd/001,002

   The CKI project reported that nbd/001 and nbd/002 fail occasionally. The
   failure cause was the race between nbd-server port readiness and nbd-client
   connect. A fix patch for blktests is posted [6].

   [6] https://lore.kernel.org/linux-block/20240719050726.265769-1-shinichiro.kawasaki@wdc.com/