Re: [LKP] [PATCH_v4.1_0_3] Make core_pattern support namespace

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 v4-v4.1: 1. Fix kernel panic pointed out by: xiaolong.ye(a)intel.com Changelog v3.1-v4: 1. remove extra fork pointed out by: Andrei Vagin <avagin(a)gmail.com&gt; 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(a)gmail.com&gt; 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(a)xmission.com&gt; Suggested-by: KOSAKI Motohiro <kosaki.motohiro(a)jp.fujitsu.com&gt; Signed-off-by: Zhao Lei <zhaolei(a)cn.fujitsu.com&gt; Signed-off-by: Cao Shufeng <caosf.fnst(a)cn.fujitsu.com&gt; 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(-)