linux-kernel - Re: next-20230124: LTP: shmctl01.c:120: TFAIL: after child shmdt() shm

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Date:   Wed, 25 Jan 2023 16:23:24 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Naresh Kamboju" <naresh.kamboju@...aro.org>,
        "open list" <linux-kernel@...r.kernel.org>,
        "LTP List" <ltp@...ts.linux.it>, lkft-triage@...ts.linaro.org,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        "Andrew Morton" <akpm@...ux-foundation.org>
Cc:     chrubis <chrubis@...e.cz>, "Shakeel Butt" <shakeelb@...gle.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Vasily Averin" <vvs@...tuozzo.com>,
        "Luiz Capitulino" <luizcap@...zon.com>
Subject: Re: next-20230124: LTP: shmctl01.c:120: TFAIL: after child shmdt()
 shm_nattcg=20 expected 0

On Wed, Jan 25, 2023, at 16:11, Naresh Kamboju wrote:
> LTP syscalls shmctl01 test failed on Linux next-20230124 tag across all the
> available architectures with following error logs,
>
> tst_test.c:1524: TINFO: Timeout per run is 0h 05m 00s
> shmctl01.c:256: TINFO: shm_id=9 maps to kernel index=9
> shmctl01.c:220: TINFO: Basic checks
> shmctl01.c:175: TPASS: IPC_STAT: shm_segsz=2048
> shmctl01.c:182: TPASS: IPC_STAT: shm_cpid=103946
> shmctl01.c:189: TPASS: IPC_STAT: shm_ctime=1674621556 in range
> <1674621556,1674621556>
> shmctl01.c:175: TPASS: SHM_STAT: shm_segsz=2048
> shmctl01.c:182: TPASS: SHM_STAT: shm_cpid=103946
> shmctl01.c:189: TPASS: SHM_STAT: shm_ctime=1674621556 in range
> <1674621556,1674621556>
> shmctl01.c:220: TINFO: Children attach SHM
> shmctl01.c:116: TPASS: before child shmat() shm_nattch=0
> shmctl01.c:116: TPASS: after child shmat() shm_nattch=20
> shmctl01.c:120: TFAIL: after child shmdt() shm_nattcg=20 expected 0
> shmctl01.c:220: TINFO: Chidlren inherit SHM
> shmctl01.c:116: TPASS: inherited after fork() shm_nattch=21
> shmctl01.c:120: TFAIL: after child shmdt() shm_nattcg=21 expected 1
> shmctl01.c:120: TFAIL: after parent shmdt() shm_nattcg=21 expected 0
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>

$ git log ..next-20230125 --stat --stat ipc/

commit 823fb3d78226e9b89c6a707654bd3284b06aef61
Author: Liam R. Howlett <Liam.Howlett@...cle.com>
Date:   Fri Jan 20 11:26:16 2023 -0500

    ipc/shm: use the vma iterator for munmap calls
    
    Pass through the vma iterator to do_vmi_munmap() to handle the iterator
    state internally
    
    Link: https://lkml.kernel.org/r/20230120162650.984577-16-Liam.Howlett@oracle.com
    Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
    Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

 ipc/shm.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

Sven Schnelle also reported this earlier today:

https://lore.kernel.org/all/20230125134558.mm3dopfa7cxqux5h@revolver/

    Arnd

> Test logs:
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230124/testrun/14344836/suite/ltp-syscalls/test/shmat01/details/
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230125/testrun/14356742/suite/ltp-syscalls/test/shmat01/log
>
> Test history:
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230125/testrun/14356742/suite/ltp-syscalls/test/shmat01/history/
>
> metadata:
>   git_ref: master
>   git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
>   git_sha: a54df7622717a40ddec95fd98086aff8ba7839a6
>   git_describe: next-20230124
>   kernel_version: 6.2.0-rc5
>   kernel-config:
> https://storage.tuxsuite.com/public/linaro/lkft/builds/2Kl19cvIBraXOcZpBGCPzCajGAs/config
>   build-url: 
> https://gitlab.com/Linaro/lkft/mirrors/next/linux-next/-/pipelines/755587911
>   artifact-location:
> https://storage.tuxsuite.com/public/linaro/lkft/builds/2Kl19cvIBraXOcZpBGCPzCajGAs/
>   toolchain: gcc-11
>
> --
> Linaro LKFT
> https://lkft.linaro.org