Messages in this thread | | | Date | Tue, 8 Aug 2023 01:09:03 +0200 | Subject | Re: selftests: net/af_unix test_unix_oob [FAILED] | From | Mirsad Todorovac <> |
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On 8/7/23 22:46, Kuniyuki Iwashima wrote: > 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 $? > 0 > [root@localhost ~]# uname -r > 6.5.0-rc4-01192-g66244337512f > ---8<--- > > I'll check 6.5-rc5 later.
Hi, Kuniyuki,
It seems that there is a new development. I could reproduce the error with the failed test 2 as early as 6.0-rc1. However, the gotcha is that the error appears to be sporadically manifested (possibly a race)?
I am currently attempting a bisect.
Kind regards, Mirsad
>> marvin@defiant:~/linux/kernel/linux_torvalds$ 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
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