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Subject[PATCH v4 0/3] Make core_pattern support namespace
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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@kerneldev 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 v3.1-v4:
1. remove extra fork pointed out by:
Andrei Vagin <avagin@gmail.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@gmail.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@xmission.com>
Suggested-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Cao Shufeng <caosf.fnst@cn.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 | 4 ++
include/linux/pid_namespace.h | 3 +
init/do_mounts_initrd.c | 3 +-
kernel/kmod.c | 43 +++++++++---
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, 241 insertions(+), 25 deletions(-)

--
2.7.4



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