On 2018-05-30 09:20, Steve Grubb wrote: > On Friday, March 16, 2018 5:00:27 AM EDT Richard Guy Briggs wrote: > > Implement audit kernel container ID. > > > > This patchset is a second RFC based on the proposal document (V3) > > posted: > > https://www.redhat.com/archives/linux-audit/2018-January/msg00014.html > > So, if you work on a container orchestrator, how exactly is this set of > interfaces to be used and in what order? It was designed keeping in mind the Virtuallization Manager Guest Lifecycle Events document. https://github.com/linux-audit/audit-documentation/wiki/SPEC-Virtualization-Manager-Guest-Lifecycle-Events The orchestrator would start setting things up and when it knows the PID of the conainer task but before that task has had a chance to thread or spawn children it registers the audit container ID via the /proc interface. After that, it consults audit for any events maching that ID. > Thanks, > -Steve > > > The first patch implements the proc fs write to set the audit container > > ID of a process, emitting an AUDIT_CONTAINER record to announce the > > registration of that container ID on that process. This patch requires > > userspace support for record acceptance and proper type display. > > > > The second checks for children or co-threads and refuses to set the > > container ID if either are present. (This policy could be changed to > > set both with the same container ID provided they meet the rest of the > > requirements.) > > > > The third implements the auxiliary record AUDIT_CONTAINER_INFO if a > > container ID is identifiable with an event. This patch requires > > userspace support for proper type display. > > > > The fourth adds container ID filtering to the exit, exclude and user > > lists. This patch requires auditctil userspace support for the > > --containerid option. > > > > The 5th adds signal and ptrace support. > > > > The 6th creates a local audit context to be able to bind a standalone > > record with a locally created auxiliary record. > > > > The 7th, 8th, 9th, 10th patches add container ID records to standalone > > records. Some of these may end up being syscall auxiliary records and > > won't need this specific support since they'll be supported via > > syscalls. > > > > The 11th adds network namespace container ID labelling based on member > > tasks' container ID labels. > > > > The 12th adds container ID support to standalone netfilter records that > > don't have a task context and lists each container to which that net > > namespace belongs. > > > > The 13th implements reading the container ID from the proc filesystem > > for debugging. This patch isn't planned for upstream inclusion. > > > > Feedback please! > > > > Example: Set a container ID of 123456 to the "sleep" task: > > sleep 2& > > child=$! > > echo 123456 > /proc/$child/containerid; echo $? > > ausearch -ts recent -m container > > echo child:$child contid:$( cat /proc/$child/containerid) > > This should produce a record such as: > > type=CONTAINER msg=audit(1521122590.315:222): op=set pid=689 uid=0 > > subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 auid=0 tty=pts0 > > ses=3 opid=707 old-contid=18446744073709551615 contid=123456 res=1 > > > > Example: Set a filter on a container ID 123459 on /tmp/tmpcontainerid: > > containerid=123459 > > key=tmpcontainerid > > auditctl -a exit,always -F dir=/tmp -F perm=wa -F containerid=$containerid > > -F key=$key perl -e "sleep 1; open(my \$tmpfile, '>', \"/tmp/$key\"); > > close(\$tmpfile);" & child=$! > > echo $containerid > /proc/$child/containerid > > sleep 2 > > ausearch -i -ts recent -k $key > > auditctl -d exit,always -F dir=/tmp -F perm=wa -F containerid=$containerid > > -F key=$key rm -f /tmp/$key > > This should produce an event such as: > > type=CONTAINER_INFO msg=audit(1521122591.614:227): op=task contid=123459 > > type=PROCTITLE msg=audit(1521122591.614:227): > > proctitle=7065726C002D6500736C65657020313B206F70656E286D792024746D7066696C > > 652C20273E272C20222F746D702F746D70636F6E7461696E6572696422293B20636C6F73652 > > 824746D7066696C65293B type=PATH msg=audit(1521122591.614:227): item=1 > > name="/tmp/tmpcontainerid" inode=18427 dev=00:26 mode=0100644 ouid=0 > > ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE > > cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0 cap_fver=0 > > type=PATH msg=audit(1521122591.614:227): item=0 name="/tmp/" inode=13513 > > dev=00:26 mode=041777 ouid=0 ogid=0 rdev=00:00 > > obj=system_u:object_r:tmp_t:s0 nametype=PARENT cap_fp=0000000000000000 > > cap_fi=0000000000000000 cap_fe=0 cap_fver=0 type=CWD > > msg=audit(1521122591.614:227): cwd="/root" > > type=SYSCALL msg=audit(1521122591.614:227): arch=c000003e syscall=257 > > success=yes exit=3 a0=ffffffffffffff9c a1=55db90a28900 a2=241 a3=1b6 > > items=2 ppid=689 pid=724 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 > > sgid=0 fsgid=0 tty=pts0 ses=3 comm="perl" exe="/usr/bin/perl" > > subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 > > key="tmpcontainerid" > > > > See: > > https://github.com/linux-audit/audit-kernel/issues/32 > > https://github.com/linux-audit/audit-userspace/issues/40 > > https://github.com/linux-audit/audit-testsuite/issues/64 > > > > Richard Guy Briggs (13): > > audit: add container id > > audit: check children and threading before allowing containerid > > audit: log container info of syscalls > > audit: add containerid filtering > > audit: add containerid support for ptrace and signals > > audit: add support for non-syscall auxiliary records > > audit: add container aux record to watch/tree/mark > > audit: add containerid support for tty_audit > > audit: add containerid support for config/feature/user records > > audit: add containerid support for seccomp and anom_abend records > > audit: add support for containerid to network namespaces > > audit: NETFILTER_PKT: record each container ID associated with a netNS > > debug audit: read container ID of a process > > > > drivers/tty/tty_audit.c | 5 +- > > fs/proc/base.c | 53 ++++++++++++++++ > > include/linux/audit.h | 43 +++++++++++++ > > include/linux/init_task.h | 4 +- > > include/linux/sched.h | 1 + > > include/net/net_namespace.h | 12 ++++ > > include/uapi/linux/audit.h | 8 ++- > > kernel/audit.c | 75 ++++++++++++++++++++--- > > kernel/audit.h | 3 + > > kernel/audit_fsnotify.c | 5 +- > > kernel/audit_tree.c | 5 +- > > kernel/audit_watch.c | 33 +++++----- > > kernel/auditfilter.c | 52 +++++++++++++++- > > kernel/auditsc.c | 145 > > ++++++++++++++++++++++++++++++++++++++++++-- kernel/nsproxy.c | > > 6 ++ > > net/core/net_namespace.c | 45 ++++++++++++++ > > net/netfilter/xt_AUDIT.c | 15 ++++- > > 17 files changed, 473 insertions(+), 37 deletions(-) > > > > - RGB -- Richard Guy Briggs <rgb@xxxxxxxxxx> Sr. S/W Engineer, Kernel Security, Base Operating Systems Remote, Ottawa, Red Hat Canada IRC: rgb, SunRaycer Voice: +1.647.777.2635, Internal: (81) 32635 -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
