Re: [PATCH ghak90 (was ghak32) V4 00/10] audit: implement container identifier

Guenter Roeck
2019-01-03T16:15:25Z

Hi,

On Tue, Jul 31, 2018 at 04:07:35PM -0400, Richard Guy Briggs wrote:
> Implement kernel audit container identifier.
>

I don't see a follow-up submission of this patch series. Has it been abandoned,
or do I use the wrong search terms ?

Thanks,
Guenter

> This patchset is a fourth based on the proposal document (V3)
> posted:
> https://www.redhat.com/archives/linux-audit/2018-January/msg00014.html
>
> The first patch is the last patch from ghak81 that is included here as a
> convenience.
>
> The second patch implements the proc fs write to set the audit container
> identifier of a process, emitting an AUDIT_CONTAINER_OP record to announce the
> registration of that audit container identifier on that process. This patch
> requires userspace support for record acceptance and proper type
> display.
>
> The third implements the auxiliary record AUDIT_CONTAINER if an
> audit container identifier is identifiable with an event. This patch
> requires userspace support for proper type display.
>
> The 4th adds signal and ptrace support.
>
> The 5th creates a local audit context to be able to bind a standalone
> record with a locally created auxiliary record.
>
> The 6th patch adds audit container identifier records to the tty
> standalone record.
>
> The 7th adds audit container identifier filtering to the exit,
> exclude and user lists. This patch adds the AUDIT_CONTID field and
> requires auditctl userspace support for the --contid option.
>
> The 8th adds network namespace audit container identifier labelling
> based on member tasks' audit container identifier labels.
>
> The 9th adds audit container identifier support to standalone netfilter
> records that don't have a task context and lists each container to which
> that net namespace belongs.
>
> The 10th implements reading the audit container identifier from the proc
> filesystem for debugging. This patch isn't planned for upstream
> inclusion.
>
>
> Example: Set an audit container identifier of 123456 to the "sleep" task:
>
> sleep 2&
> child=$!
> echo 123456 > /proc/$child/audit_containerid; echo $?
> ausearch -ts recent -m container
> echo child:$child contid:$( cat /proc/$child/audit_containerid)
>
> This should produce a record such as:
>
> type=CONTAINER_OP msg=audit(2018-06-06 12:39:29.636:26949) : op=set opid=2209 old-contid=18446744073709551615 contid=123456 pid=628 auid=root uid=root tty=ttyS0 ses=1 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 comm=bash exe=/usr/bin/bash res=yes
>
>
> Example: Set a filter on an audit container identifier 123459 on /tmp/tmpcontainerid:
>
> contid=123459
> key=tmpcontainerid
> auditctl -a exit,always -F dir=/tmp -F perm=wa -F contid=$contid -F key=$key
> perl -e "sleep 1; open(my \$tmpfile, '>', \"/tmp/$key\"); close(\$tmpfile);" &
> child=$!
> echo $contid > /proc/$child/audit_containerid
> sleep 2
> ausearch -i -ts recent -k $key
> auditctl -d exit,always -F dir=/tmp -F perm=wa -F contid=$contid -F key=$key
> rm -f /tmp/$key
>
> This should produce an event such as:
>
> type=CONTAINER msg=audit(2018-06-06 12:46:31.707:26953) : op=task contid=123459
> type=PROCTITLE msg=audit(2018-06-06 12:46:31.707:26953) : proctitle=perl -e sleep 1; open(my $tmpfile, '>', "/tmp/tmpcontainerid"); close($tmpfile);
> type=PATH msg=audit(2018-06-06 12:46:31.707:26953) : item=1 name=/tmp/tmpcontainerid inode=25656 dev=00:26 mode=file,644 ouid=root ogid=root rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE cap_fp=none cap_fi=none cap_fe=0 cap_fver=0
> type=PATH msg=audit(2018-06-06 12:46:31.707:26953) : item=0 name=/tmp/ inode=8985 dev=00:26 mode=dir,sticky,777 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype=PARENT cap_fp=none cap_fi=none cap_fe=0 cap_fver=0
> type=CWD msg=audit(2018-06-06 12:46:31.707:26953) : cwd=/root
> type=SYSCALL msg=audit(2018-06-06 12:46:31.707:26953) : arch=x86_64 syscall=openat success=yes exit=3 a0=0xffffffffffffff9c a1=0x5621f2b81900 a2=O_WRONLY|O_CREAT|O_TRUNC a3=0x1b6 items=2 ppid=628 pid=2232 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=ttyS0 ses=1 comm=perl exe=/usr/bin/perl subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=tmpcontainerid
>
>
> Includes: https://github.com/linux-audit/audit-kernel/issues/81
> See: https://github.com/linux-audit/audit-kernel/issues/90
> See: https://github.com/linux-audit/audit-userspace/issues/40
> See: https://github.com/linux-audit/audit-testsuite/issues/64
> See: https://github.com/linux-audit/audit-kernel/wiki/RFE-Audit-Container-ID
>
> Changelog:
>
> v4
> - preface set with ghak81:"collect audit task parameters"
> - add shallyn and sgrubb acks
> - rename feature bitmap macro
> - rename cid_valid() to audit_contid_valid()
> - rename AUDIT_CONTAINER_ID to AUDIT_CONTAINER_OP
> - delete audit_get_contid_list() from headers
> - move work into inner if, delete "found"
> - change netns contid list function names
> - move exports for audit_log_contid audit_alloc_local audit_free_context to non-syscall patch
> - list contids CSV
> - pass in gfp flags to audit_alloc_local() (fix audit_alloc_context callers)
> - use "local" in lieu of abusing in_syscall for auditsc_get_stamp()
> - read_lock(&tasklist_lock) around children and thread check
> - task_lock(tsk) should be taken before first check of tsk->audit
> - add spin lock to contid list in aunet
> - restrict /proc read to CAP_AUDIT_CONTROL
> - remove set again prohibition and inherited flag
> - delete contidion spelling fix from patchset, send to netdev/linux-wireless
>
> v3
> - switched from containerid in task_struct to audit_task_info (depends on ghak81)
> - drop INVALID_CID in favour of only AUDIT_CID_UNSET
> - check for !audit_task_info, throw -ENOPROTOOPT on set
> - changed -EPERM to -EEXIST for parent check
> - return AUDIT_CID_UNSET if !audit_enabled
> - squash child/thread check patch into AUDIT_CONTAINER_ID patch
> - changed -EPERM to -EBUSY for child check
> - separate child and thread checks, use -EALREADY for latter
> - move addition of op= from ptrace/signal patch to AUDIT_CONTAINER patch
> - fix && to || bashism in ptrace/signal patch
> - uninline and export function for audit_free_context()
> - drop CONFIG_CHANGE, FEATURE_CHANGE, ANOM_ABEND, ANOM_SECCOMP patches
> - move audit_enabled check (xt_AUDIT)
> - switched from containerid list in struct net to net_generic's struct audit_net
> - move containerid list iteration into audit (xt_AUDIT)
> - create function to move namespace switch into audit
> - switched /proc/PID/ entry from containerid to audit_containerid
> - call kzalloc with GFP_ATOMIC on in_atomic() in audit_alloc_context()
> - call kzalloc with GFP_ATOMIC on in_atomic() in audit_log_container_info()
> - use xt_net(par) instead of sock_net(skb->sk) to get net
> - switched record and field names: initial CONTAINER_ID, aux CONTAINER, field CONTID
> - allow to set own contid
> - open code audit_set_containerid
> - add contid inherited flag
> - ccontainerid and pcontainerid eliminated due to inherited flag
> - change name of container list funcitons
> - rename containerid to contid
> - convert initial container record to syscall aux
> - fix spelling mistake of contidion in net/rfkill/core.c to avoid contid name collision
>
> v2
> - add check for children and threads
> - add network namespace container identifier list
> - add NETFILTER_PKT audit container identifier logging
> - patch description and documentation clean-up and example
> - reap unused ppid
>
> Richard Guy Briggs (10):
> audit: collect audit task parameters
> audit: add container id
> audit: log container info of syscalls
> audit: add containerid support for ptrace and signals
> audit: add support for non-syscall auxiliary records
> audit: add containerid support for tty_audit
> audit: add containerid filtering
> 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 | 56 ++++++++++++++
> include/linux/audit.h | 95 ++++++++++++++++++++---
> include/linux/sched.h | 5 +-
> include/uapi/linux/audit.h | 8 +-
> init/init_task.c | 3 +-
> init/main.c | 2 +
> kernel/audit.c | 137 +++++++++++++++++++++++++++++++++
> kernel/audit.h | 4 +
> kernel/auditfilter.c | 47 ++++++++++++
> kernel/auditsc.c | 183 ++++++++++++++++++++++++++++++++++++++++-----
> kernel/fork.c | 4 +-
> kernel/nsproxy.c | 4 +
> net/netfilter/xt_AUDIT.c | 12 ++-
> 14 files changed, 526 insertions(+), 39 deletions(-)
>
> --
> 1.8.3.1
>