linux-kernel - LTP: shmget02 fails on compat mode - 64-bit kernel and 32-bit userspace

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Message-ID: <CA+G9fYuKehraq_kcHdVgqWnwQWHN2QiE7ze53mXJvtL0DLc0uQ@mail.gmail.com>
Date:   Fri, 19 May 2023 14:47:19 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        LTP List <ltp@...ts.linux.it>, lkft-triage@...ts.linaro.org
Cc:     Arnd Bergmann <arnd@...db.de>, Ard Biesheuvel <ardb@...nel.org>,
        Dan Carpenter <dan.carpenter@...aro.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        chrubis <chrubis@...e.cz>, Petr Vorel <pvorel@...e.cz>,
        Martin Doucha <mdoucha@...e.cz>
Subject: LTP: shmget02 fails on compat mode - 64-bit kernel and 32-bit userspace

LTP running on compat mode where the tests run on
64-bit kernel and 32-bit userspace are noticed on a list of failures.

What would be the best way to handle this rare combination of failures ?

* arm64: juno-r2-compat, qemu_arm64-compat and qemu_x86_64-compat
    - shmget02

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

tst_hugepage.c:83: TINFO: 0 hugepage(s) reserved
tst_test.c:1558: TINFO: Timeout per run is 0h 02m 30s
tst_kconfig.c:87: TINFO: Parsing kernel config '/proc/config.gz'
shmget02.c:95: TPASS: shmget(1644199826, 2048, 1024) : ENOENT (2)
shmget02.c:95: TPASS: shmget(1627422610, 2048, 1536) : EEXIST (17)
<4>[   84.678150] __vm_enough_memory: pid: 513, comm: shmget02, not
enough memory for the allocation
shmget02.c:95: TPASS: shmget(1644199826, 0, 1536) : EINVAL (22)
shmget02.c:95: TFAIL: shmget(1644199826, 4278190080, 1536) expected
EINVAL: ENOMEM (12)
shmget02.c:95: TPASS: shmget(1627422610, 4096, 1024) : EINVAL (22)
shmget02.c:107: TPASS: shmget(1627422610, 2048, 256) : EACCES (13)
shmget02.c:107: TPASS: shmget(1644199826, 2048, 2560) : EPERM (1)
shmget02.c:95: TPASS: shmget(1644199826, 2048, 2560) : ENOMEM (12)

logs:
-----
 - https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.4-rc1-71-g105131df9c3b/testrun/16880333/suite/ltp-syscalls/test/shmget02/log
 - https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.4-rc1-71-g105131df9c3b/testrun/16880333/suite/ltp-syscalls/test/shmget02/history/


--
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https://lkft.linaro.org