Linux 5.19-rc7 liburing test `poll-mshot-overflow.t` and `read-write.t` fail

[Ammar Faizi]

Hello Jens,

Kernel version:

  commit ff6992735ade75aae3e35d16b17da1008d753d28
  Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
  Date:   Sun Jul 17 13:30:22 2022 -0700

      Linux 5.19-rc7

liburing version:

  commit 4e6eec8bdea906fe5341c97aef96986d605004e9 (HEAD, origin/master, origin/HEAD)
  Author: Dylan Yudaken <dylany@xxxxxx>
  Date:   Mon Jul 18 06:34:29 2022 -0700

      fix io_uring_recvmsg_cmsg_nexthdr logic
      
      io_uring_recvmsg_cmsg_nexthdr was using the payload to delineate the end
      of the cmsg list, but really it needs to use whatever was returned by the
      kernel.
      
      Reported-and-tested-by: Jens Axboe <axboe@xxxxxxxxx>
      Fixes: 874406f7fb09 ("add multishot recvmsg API")
      Signed-off-by: Dylan Yudaken <dylany@xxxxxx>
      Link: https://lore.kernel.org/r/20220718133429.726628-1-dylany@xxxxxx
      Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>

Two liburing tests fail:

  Tests failed:  <poll-mshot-overflow.t> <read-write.t>
  make[1]: *** [Makefile:237: runtests] Error 1
  make[1]: Leaving directory '/home/ammarfaizi2/app/liburing/test'
  make: *** [Makefile:21: runtests] Error 2


  ammarfaizi2@integral2:~/app/liburing$ uname -a
  Linux integral2 5.19.0-rc7-2022-07-18 #1 SMP PREEMPT_DYNAMIC Mon Jul 18 15:42:27 WIB 2022 x86_64 x86_64 x86_64 GNU/Linux
  ammarfaizi2@integral2:~/app/liburing$ test/read-write.t
  cqe res -22, wanted 8192
  test_buf_select vec failed
  ammarfaizi2@integral2:~/app/liburing$ test/poll-mshot-overflow.t
  signalled no more!
  ammarfaizi2@integral2:~/app/liburing$

JFYI, -22 is -EINVAL.

read-write.t call trace when calling fprintf(..., "cqe res %d, wanted %d\n", ...):

  #0  ___fprintf_chk (./debug/fprintf_chk.c:25)
  #1  fprintf (/usr/include/x86_64-linux-gnu/bits/stdio2.h:105)
  #2  __test_io (read-write.c:181)
  #3  test_buf_select (read-write.c:577)
  #4  main (read-write.c:849)

poll-mshot-overflow.t call trace should be trivial.

--
Ammar Faizi