* problem while restarting auditd
@ 2011-09-15 6:32 Vipin Rathor
2011-09-16 1:30 ` Steve Grubb
0 siblings, 1 reply; 3+ messages in thread
From: Vipin Rathor @ 2011-09-15 6:32 UTC (permalink / raw)
To: linux-audit
Guys,
Good Morning/Afternoon/evening !
One strange thing I'm seeing in /var/log/messages w.r.t. auditd restart.
2011-09-14T11:49:14.541661-07:00 audisp-remote: audisp-remote is
exiting on stop request
2011-09-14T11:49:18.741166-07:00 kernel: audit: *NO* daemon at audit_pid=1652525
2011-09-14T11:49:18.741190-07:00 kernel: __ratelimit: 366 callbacks suppressed
2011-09-14T11:49:18.745558-07:00 auditd[1654362]: Started dispatcher:
/sbin/audispd pid: 1654364
2011-09-14T11:49:18.746081-07:00 audispd: max_restarts_parser called with: 10
2011-09-14T11:49:18.746099-07:00 audispd: priority_boost_parser called with: 10
2011-09-14T11:49:18.746666-07:00 audispd: audispd initialized with
q_depth=90000 and 1 active plugins
2011-09-14T11:49:18.747047-07:00 audisp-remote: Connected to
<remote_audit_logging_server_IP>
2011-09-14T11:49:18.750761-07:00 kernel: audit: audit_lost=3823
audit_rate_limit=0 audit_backlog_limit=20480
2011-09-14T11:49:18.750773-07:00 kernel: audit: auditd dissapeared
<========= why this message?
2011-09-14T11:49:18.750777-07:00 kernel:
Whenever I'm restarting the auditd using 'service auditd restart'
command, the auditd gets restarted. But the very next moment, I get
"kernel: audit: auditd dissapeared " message & auditing stops
(actually it falls back to syslog). I've to again run 'service auditd
restart' to get the auditing back. So it is taking two restart
operation to do the job. This behavior is consistent & I can recreate
at will.
Also ,when I'm doing 'service auditd stop', followed by 'serveri
auditd start', this is working as desired.
I also tried putting 'sleep 2' between stop & start in
/etc/init.d/auditd, this doesn't solve the issue either.
Is this a know bug and any recommendation over it ?
I'm using audit-2.1-5.el6.x86_64 and audispd-plugins-2.1-5.el6.x86_64
on RHEL 6.1.
Thanks a lot for your help!!
--
-Rathor
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: problem while restarting auditd
2011-09-15 6:32 problem while restarting auditd Vipin Rathor
@ 2011-09-16 1:30 ` Steve Grubb
2011-09-23 5:55 ` Vipin Rathor
0 siblings, 1 reply; 3+ messages in thread
From: Steve Grubb @ 2011-09-16 1:30 UTC (permalink / raw)
To: linux-audit, Eric Paris
On Thursday, September 15, 2011 02:32:59 AM Vipin Rathor wrote:
> One strange thing I'm seeing in /var/log/messages w.r.t. auditd restart.
>
> 2011-09-14T11:49:14.541661-07:00 audisp-remote: audisp-remote is
> exiting on stop request
> 2011-09-14T11:49:18.741166-07:00 kernel: audit: *NO* daemon at
> audit_pid=1652525 2011-09-14T11:49:18.741190-07:00 kernel: __ratelimit:
> 366 callbacks suppressed 2011-09-14T11:49:18.745558-07:00 auditd[1654362]:
> Started dispatcher: /sbin/audispd pid: 1654364
> 2011-09-14T11:49:18.746081-07:00 audispd: max_restarts_parser called with:
> 10 2011-09-14T11:49:18.746099-07:00 audispd: priority_boost_parser called
> with: 10 2011-09-14T11:49:18.746666-07:00 audispd: audispd initialized
> with q_depth=90000 and 1 active plugins
> 2011-09-14T11:49:18.747047-07:00 audisp-remote: Connected to
> <remote_audit_logging_server_IP>
> 2011-09-14T11:49:18.750761-07:00 kernel: audit: audit_lost=3823
> audit_rate_limit=0 audit_backlog_limit=20480
> 2011-09-14T11:49:18.750773-07:00 kernel: audit: auditd dissapeared
> <========= why this message?
> 2011-09-14T11:49:18.750777-07:00 kernel:
This comes from the following code:
http://lxr.linux.no/#linux+v3.0.4/kernel/audit.c#L401
It sort of follows this:
446 if (audit_pid)
447 kauditd_send_skb(skb);
Then
401 err = netlink_unicast(audit_sock, skb, audit_nlk_pid, 0);
402 if (err < 0) {
404 printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n",
audit_pid);
405 audit_log_lost("auditd disappeared\n");
So, what looks like happened is you have a busy system and an event was queued to be
sent to user space, the audit_pid exited so it started the call, but by the time the
call was made, the netlink layer couldn't find the pid and then failed.
Eric, is there anything that can be done about this race?
> Whenever I'm restarting the auditd using 'service auditd restart'
> command, the auditd gets restarted. But the very next moment, I get
> "kernel: audit: auditd dissapeared " message & auditing stops
> (actually it falls back to syslog). I've to again run 'service auditd
> restart' to get the auditing back. So it is taking two restart
> operation to do the job. This behavior is consistent & I can recreate
> at will.
This is something strange too. But sounds like perhaps another race of some kind.
-Steve
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: problem while restarting auditd
2011-09-16 1:30 ` Steve Grubb
@ 2011-09-23 5:55 ` Vipin Rathor
0 siblings, 0 replies; 3+ messages in thread
From: Vipin Rathor @ 2011-09-23 5:55 UTC (permalink / raw)
To: Steve Grubb; +Cc: linux-audit
Hi Steve,
I'm still facing this issue & have to restart auditd twice each time.
Any update on this one?
On Fri, Sep 16, 2011 at 7:00 AM, Steve Grubb <sgrubb@redhat.com> wrote:
> On Thursday, September 15, 2011 02:32:59 AM Vipin Rathor wrote:
>> One strange thing I'm seeing in /var/log/messages w.r.t. auditd restart.
>>
>> 2011-09-14T11:49:14.541661-07:00 audisp-remote: audisp-remote is
>> exiting on stop request
>> 2011-09-14T11:49:18.741166-07:00 kernel: audit: *NO* daemon at
>> audit_pid=1652525 2011-09-14T11:49:18.741190-07:00 kernel: __ratelimit:
>> 366 callbacks suppressed 2011-09-14T11:49:18.745558-07:00 auditd[1654362]:
>> Started dispatcher: /sbin/audispd pid: 1654364
>> 2011-09-14T11:49:18.746081-07:00 audispd: max_restarts_parser called with:
>> 10 2011-09-14T11:49:18.746099-07:00 audispd: priority_boost_parser called
>> with: 10 2011-09-14T11:49:18.746666-07:00 audispd: audispd initialized
>> with q_depth=90000 and 1 active plugins
>> 2011-09-14T11:49:18.747047-07:00 audisp-remote: Connected to
>> <remote_audit_logging_server_IP>
>> 2011-09-14T11:49:18.750761-07:00 kernel: audit: audit_lost=3823
>> audit_rate_limit=0 audit_backlog_limit=20480
>> 2011-09-14T11:49:18.750773-07:00 kernel: audit: auditd dissapeared
>> <========= why this message?
>> 2011-09-14T11:49:18.750777-07:00 kernel:
>
> This comes from the following code:
> http://lxr.linux.no/#linux+v3.0.4/kernel/audit.c#L401
>
> It sort of follows this:
>
> 446 if (audit_pid)
> 447 kauditd_send_skb(skb);
>
> Then
> 401 err = netlink_unicast(audit_sock, skb, audit_nlk_pid, 0);
> 402 if (err < 0) {
> 404 printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n",
> audit_pid);
> 405 audit_log_lost("auditd disappeared\n");
>
> So, what looks like happened is you have a busy system and an event was queued to be
> sent to user space, the audit_pid exited so it started the call, but by the time the
> call was made, the netlink layer couldn't find the pid and then failed.
>
> Eric, is there anything that can be done about this race?
>
>
>> Whenever I'm restarting the auditd using 'service auditd restart'
>> command, the auditd gets restarted. But the very next moment, I get
>> "kernel: audit: auditd dissapeared " message & auditing stops
>> (actually it falls back to syslog). I've to again run 'service auditd
>> restart' to get the auditing back. So it is taking two restart
>> operation to do the job. This behavior is consistent & I can recreate
>> at will.
>
> This is something strange too. But sounds like perhaps another race of some kind.
>
> -Steve
>
--
-Rathor
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2011-09-23 5:55 UTC | newest]
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2011-09-15 6:32 problem while restarting auditd Vipin Rathor
2011-09-16 1:30 ` Steve Grubb
2011-09-23 5:55 ` Vipin Rathor
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