linux-kernel - Re: [PATCH_v4.1_0_3] Make core

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Message-ID: <1487741154.2401.10.camel@cn.fujitsu.com>
Date:   Wed, 22 Feb 2017 13:25:54 +0800
From:   Cao Shufeng/曹树烽 
        <caosf.fnst@...fujitsu.com>
To:     <ebiederm@...ssion.com>, <mguzik@...hat.com>,
        <kamezawa.hiroyu@...fujitsu.com>, <stgraber@...ntu.com>,
        <avagin@...il.com>, <zhaolei@...fujitsu.com>,
        <mashimiao.fnst@...fujitsu.com>, <linux-kernel@...r.kernel.org>,
        <containers@...ts.linux-foundation.org>, <lkp@...org>
Subject: Re: [PATCH_v4.1_0_3] Make core_pattern support namespace

ping
在 2017-02-08三的 11:00 +0800，Cao Shufeng写道：
> This patchset includes following function points:
> 1: Let usermodehelper function possible to set pid namespace
>    done by: [PATCH v4 1/3] Make call_usermodehelper_exec possible
>    to set pid namespace.
> 2: Let pipe_type core_pattern write dump into container's rootfs
>    done by: [PATCH v4 2/3] Limit dump_pipe program's permission to
>    init for container.
> 2: Make separate core_pattern setting for each container
>    done by: [PATCH v4 3/3] Make core_pattern support namespace
> 3: Compatibility with current system
>    also included in: [PATCH v4 3/3] Make core_pattern support namespace
>    If container hadn't change core_pattern setting, it will keep
>    same setting with host.
> 
> Test:
> 1: Pass a test script for each function of this patchset
>    ## TEST IN HOST ##
>    [root@...neldev dumptest]# ./test_host
>    Set file core_pattern: OK
>    ./test_host: line 41:  2366 Segmentation fault      (core dumped) "$SCRI=
> PT_BASE_DIR"/make_dump
>    Checking dumpfile: OK
>    Set file core_pattern: OK
>    ./test_host: line 41:  2369 Segmentation fault      (core dumped) "$SCRI=
> PT_BASE_DIR"/make_dump
>    Checking dump_pipe triggered: OK
>    Checking rootfs: OK
>    Checking dumpfile: OK
>    Checking namespace: OK
>    Checking process list: OK
>    Checking capabilities: OK
> 
>    ## TEST IN GUEST ##
>    # ./test
>    Segmentation fault (core dumped)
>    Checking dump_pipe triggered: OK
>    Checking rootfs: OK
>    Checking dumpfile: OK
>    Checking namespace: OK
>    Checking process list: OK
>    Checking cg pids: OK
>    Checking capabilities: OK
>    [   64.940734] make_dump[2432]: segfault at 0 ip 000000000040049d sp 000=
> 07ffc4af025f0 error 6 in make_dump[400000+a6000]
>    #
> 2: Pass other test(which is not easy to do in script) by hand.
> 
> Changelog v4-v4.1:
> 1. Fix kernel panic pointed out by:
>    xiaolong.ye@...el.com
> 
> Changelog v3.1-v4:
> 1. remove extra fork pointed out by:
>    Andrei Vagin <avagin@...il.com>
> 
> Changelog v3-v3.1:
> 1. Switch "pwd" of pipe program to container's root fs.
> 2. Rebase on top of v4.9-rc1
> 
> Changelog v2->v3:
> 1: Fix problem of setting pid namespace, pointed out by:
>    Andrei Vagin <avagin@...il.com>
> 
> Changelog v1(RFC)->v2:
> 1: Add [PATCH 2/2] which was todo in [RFC v1].
> 2: Pass a test script for each function.
> 3: Rebase on top of v4.7.
> 
> Suggested-by: Eric W. Biederman <ebiederm@...ssion.com>
> Suggested-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Signed-off-by: Zhao Lei <zhaolei@...fujitsu.com>
> Signed-off-by: Cao Shufeng <caosf.fnst@...fujitsu.com>
> 
> Cao Shufeng (2):
>   Make call_usermodehelper_exec possible to set namespaces
>   Limit dump_pipe program's permission to init for container
> 
> Zhao Lei (1):
>   Make core_pattern support namespace
> 
>  fs/coredump.c                 | 150 +++++++++++++++++++++++++++++++++++++++---
>  include/linux/binfmts.h       |   2 +
>  include/linux/kmod.h          |   5 ++
>  include/linux/pid_namespace.h |   3 +
>  init/do_mounts_initrd.c       |   3 +-
>  kernel/kmod.c                 |  55 +++++++++++++---
>  kernel/pid.c                  |   2 +
>  kernel/pid_namespace.c        |   2 +
>  kernel/sysctl.c               |  50 ++++++++++++--
>  lib/kobject_uevent.c          |   3 +-
>  security/keys/request_key.c   |   4 +-
>  11 files changed, 253 insertions(+), 26 deletions(-)
> 

-- 
Best Regards,
Cao Shufeng
--------------------------------------------------
Cao Shufeng
Development Dept.I
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
No.6 Wenzhu Road, Nanjing, 210012, China 
TEL: +86+25-86630566-8552
FUJITSU INTERNAL: 7998-8552
EMail: caosf.fnst@...fujitsu.com