Re: selftests: net/af_unix test_unix_oob [FAILED]

From: Mirsad Todorovac mirsad.todorovac@alu.unizg.hr Date: Mon, 7 Aug 2023 21:44:41 +0200

Hi all,

In the kernel 6.5-rc5 build on Ubuntu 22.04 LTS (jammy jellyfish) on a Ryzen 7950 assembled box, vanilla torvalds tree kernel, the test test_unix_oob unexpectedly fails:

# selftests: net/af_unix: test_unix_oob # Test 2 failed, sigurg 23 len 63 OOB %

It is this code:

     /* Test 2:
      * Verify that the first OOB is over written by
      * the 2nd one and the first OOB is returned as
      * part of the read, and sigurg is received.
      */
     wait_for_data(pfd, POLLIN | POLLPRI);
     len = 0;
     while (len < 70)
             len = recv(pfd, buf, 1024, MSG_PEEK);
     len = read_data(pfd, buf, 1024);
     read_oob(pfd, &oob);
     if (!signal_recvd || len != 127 || oob != '#') {
             fprintf(stderr, "Test 2 failed, sigurg %d len %d OOB %c\n",
             signal_recvd, len, oob);
             die(1);
     }

In 6.5-rc4, this test was OK, so it might mean we have a regression?

Thanks for reporting.

I confirmed the test doesn't fail on net-next at least, but it's based on v6.5-rc4.

---8<--- [root@localhost ~]# ./test_unix_oob [root@localhost ~]# echo $? 0 [root@localhost ~]# uname -r 6.5.0-rc4-01192-g66244337512f ---8<---

I'll check 6.5-rc5 later.

marvin@defiant:~/linux/kernel/linux_torvalds$ grep test_unix_oob ../kselftest-6.5-rc4-1.log /net/af_unix/test_unix_oob # selftests: net/af_unix: test_unix_oob ok 2 selftests: net/af_unix: test_unix_oob marvin@defiant:~/linux/kernel/linux_torvalds$

Hope this helps.

NOTE: the kernel is vanilla torvalds tree, only "dirty" because the selftests were modified.

Kind regards, Mirsad Todorovac