Re: [PATCH ghak90 V6 04/10] audit: log container info of syscalls

On Mon, Apr 8, 2019 at 11:40 PM Richard Guy Briggs <rgb(a)redhat.com&gt; wrote: > > Create a new audit record AUDIT_CONTAINER_ID to document the audit > container identifier of a process if it is present. > > Called from audit_log_exit(), syscalls are covered. > > A sample raw event: > type=SYSCALL msg=audit(1519924845.499:257): arch=c000003e syscall=257 success=yes exit=3 a0=ffffff9c a1=56374e1cef30 a2=241 a3=1b6 items=2 ppid=606 pid=635 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=3 comm="bash" exe="/usr/bin/bash" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="tmpcontainerid" > type=CWD msg=audit(1519924845.499:257): cwd="/root" > type=PATH msg=audit(1519924845.499:257): item=0 name="/tmp/" inode=13863 dev=00:27 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype= PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > type=PATH msg=audit(1519924845.499:257): item=1 name="/tmp/tmpcontainerid" inode=17729 dev=00:27 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > type=PROCTITLE msg=audit(1519924845.499:257): proctitle=62617368002D6300736C65657020313B206563686F2074657374203E202F746D702F746D70636F6E7461696E65726964 > type=CONTAINER_ID msg=audit(1519924845.499:257): contid=123458 > > Please see the github audit kernel issue for the main feature: > https://github.com/linux-audit/audit-kernel/issues/90 > Please see the github audit userspace issue for supporting additions: > https://github.com/linux-audit/audit-userspace/issues/51 > Please see the github audit testsuiite issue for the test case: > https://github.com/linux-audit/audit-testsuite/issues/64 > Please see the github audit wiki for the feature overview: > https://github.com/linux-audit/audit-kernel/wiki/RFE-Audit-Container-ID > Signed-off-by: Richard Guy Briggs <rgb(a)redhat.com&gt; > Acked-by: Serge Hallyn <serge(a)hallyn.com&gt; > Acked-by: Steve Grubb <sgrubb(a)redhat.com&gt; > Acked-by: Neil Horman <nhorman(a)tuxdriver.com&gt; > Reviewed-by: Ondrej Mosnacek <omosnace(a)redhat.com&gt; > --- > include/linux/audit.h | 5 +++++ > include/uapi/linux/audit.h | 1 + > kernel/audit.c | 20 ++++++++++++++++++++ > kernel/auditsc.c | 20 ++++++++++++++------ > 4 files changed, 40 insertions(+), 6 deletions(-) ... > diff --git a/kernel/audit.c b/kernel/audit.c > index 182b0f2c183d..3e0af53f3c4d 100644 > --- a/kernel/audit.c > +++ b/kernel/audit.c > @@ -2127,6 +2127,26 @@ void audit_log_session_info(struct audit_buffer *ab) > audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); > } > > +/* > + * audit_log_contid - report container info > + * @context: task or local context for record > + * @contid: container ID to report > + */ > +void audit_log_contid(struct audit_context *context, u64 contid) > +{ > + struct audit_buffer *ab; > + > + if (!audit_contid_valid(contid)) > + return; > + /* Generate AUDIT_CONTAINER_ID record with container ID */ > + ab = audit_log_start(context, GFP_KERNEL, AUDIT_CONTAINER_ID); > + if (!ab) > + return; > + audit_log_format(ab, "contid=%llu", (unsigned long long)contid); We have a consistency problem regarding how to output the u64 contid values; this function uses an explicit cast, others do not. According to Documentation/core-api/printk-formats.rst the recommendation for u64 is %llu (or %llx, if you want hex). Looking quickly through the printk code this appears to still be correct. I suggest we get rid of the cast (like it was in v5).

> + audit_log_end(ab); > +} > +EXPORT_SYMBOL(audit_log_contid); -- paul moore www.paul-moore.com