Gordon,
Thank you for your help on this. Still not working...
On 04/26/2017 06:27 PM, Gordon Messmer wrote:
On 04/26/2017 12:29 AM, Robert Moskowitz wrote:
But the policy generates errors. I will have to submit a bug report,
it seems
A bug report would probably be helpful.
I'm looking back at the message you wrote describing errors in
ld-2.17.so. I think what's happening is that the policy on your
system includes a silent rule that somehow breaks your system. You'll
need to turn on debugging (logging the otherwise silent AVCs) to
figure this out, in order to provide information that the maintainers
can use to actually fix the problem.
So, similar to the previous process:
1: semodule -DB
2: setenforce permissive
3: tail -f /var/log/audit/audit.log | grep AVC
4: use the service, exercise each function that's constrained by the
existing policy
5: copy and paste the output from the terminal used for #2 into
"audit2allow -M <modulename>"
6: setenforce enforcing
7: semodule -B
You'll want to do this with your custom policy installed. In the
terminal that's following audit.log, you should now see AVCs logged
that you didn't before. Please send them to the list.
If you're only interested in resolving your problem, it should be
sufficient to build one new module with the AVCs logged here. If you
want to produce a useful bug report and fix the problem for the
future, for everyone, you need to first get back into enforcing mode
and THEN build a new module with each individual AVC, installing each
one and then testing dovecot, until you resolve the problem, and then
removing all of the other new modules until you confirm that you've
found one (or a minimal combination) of rules that is causing dovecot
to crash and log a backtrace.
Here are the messages I got:
type=AVC msg=audit(1493361695.041:49205): avc: denied { rlimitinh }
for pid=3047 comm="cleanup"
scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_cleanup_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361695.041:49205): avc: denied { siginh } for
pid=3047 comm="cleanup" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_cleanup_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361695.041:49205): avc: denied { noatsecure }
for pid=3047 comm="cleanup"
scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_cleanup_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361695.978:49206): avc: denied { rlimitinh }
for pid=3052 comm="lmtp" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_smtp_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361695.978:49206): avc: denied { siginh } for
pid=3052 comm="lmtp" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_smtp_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361695.978:49206): avc: denied { noatsecure }
for pid=3052 comm="lmtp" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_smtp_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361698.775:49208): avc: denied { rlimitinh }
for pid=3056 comm="smtpd"
scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_smtpd_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361698.775:49208): avc: denied { siginh } for
pid=3056 comm="smtpd" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_smtpd_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361698.775:49208): avc: denied { noatsecure }
for pid=3056 comm="smtpd"
scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_smtpd_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361699.102:49209): avc: denied { rlimitinh }
for pid=3057 comm="auth" scontext=system_u:system_r:dovecot_t:s0
tcontext=system_u:system_r:dovecot_auth_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361699.102:49209): avc: denied { siginh } for
pid=3057 comm="auth" scontext=system_u:system_r:dovecot_t:s0
tcontext=system_u:system_r:dovecot_auth_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361699.102:49209): avc: denied { noatsecure }
for pid=3057 comm="auth" scontext=system_u:system_r:dovecot_t:s0
tcontext=system_u:system_r:dovecot_auth_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361699.950:49210): avc: denied { rlimitinh }
for pid=3063 comm="pipe" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_pipe_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361699.950:49210): avc: denied { siginh } for
pid=3063 comm="pipe" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_pipe_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361699.950:49210): avc: denied { noatsecure }
for pid=3063 comm="pipe" scontext=system_u:system_r:postfix_master_t:s0
tcontext=system_u:system_r:postfix_pipe_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361700.073:49211): avc: denied { rlimitinh }
for pid=3064 comm="deliver"
scontext=system_u:system_r:postfix_pipe_t:s0
tcontext=system_u:system_r:dovecot_deliver_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361700.073:49211): avc: denied { siginh } for
pid=3064 comm="deliver" scontext=system_u:system_r:postfix_pipe_t:s0
tcontext=system_u:system_r:dovecot_deliver_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361700.073:49211): avc: denied { noatsecure }
for pid=3064 comm="deliver"
scontext=system_u:system_r:postfix_pipe_t:s0
tcontext=system_u:system_r:dovecot_deliver_t:s0 tclass=process permissive=1
type=AVC msg=audit(1493361700.724:49212): avc: denied { open } for
pid=3068 comm="dict" path="/etc/my.cnf.d" dev="sda3" ino=12779
scontext=system_u:system_r:dovecot_t:s0
tcontext=system_u:object_r:mysqld_etc_t:s0 tclass=dir permissive=1
type=USER_AVC msg=audit(1493361722.244:49216): pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='avc: received setenforce notice (enforcing=0)
exe="/usr/lib/systemd/systemd" sauid=0 hostname=? addr=? terminal=?'
I made the policy, applied it, and set my standard sendmail test:
sendmail -i testit3@xxxxxxxxxxxxxxxxxxxx <
/usr/share/doc/amavisd-new-2.10.1/test-messages/README
It failed accessing mysql with the following maillog messages:
Apr 28 02:55:11 z9m9z postfix/pickup[1554]: 8A0124CDA: uid=0 from=<root>
Apr 28 02:55:11 z9m9z postfix/cleanup[3354]: 8A0124CDA:
message-id=<20170428065511.8A0124CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Apr 28 02:55:11 z9m9z postfix/qmgr[6166]: 8A0124CDA:
from=<root@xxxxxxxxxxxxxxxxxxxxxxxxxx>, size=1424, nrcpt=1 (queue active)
Apr 28 02:55:11 z9m9z amavis[7341]: (07341-17) NOTICE: reconnecting in
response to: err=2006, HY000, DBD::mysql::st execute failed: MySQL
server has gone away at (eval 129) line 172.
Apr 28 02:55:11 z9m9z amavis[7341]: (07341-17) LMTP [127.0.0.1]:10024
/var/spool/amavisd/tmp/amavis-20170427T030938-07341-6TygUJMr:
<root@xxxxxxxxxxxxxxxxxxxxxxxxxx> -> <testit3@xxxxxxxxxxxxxxxxxxxx>
SIZE=1424 Received: from z9m9z.test.htt-consult.com ([127.0.0.1]) by
localhost (z9m9z.test.htt-consult.com [127.0.0.1]) (amavisd-new, port
10024) with LMTP for <testit3@xxxxxxxxxxxxxxxxxxxx>; Fri, 28 Apr 2017
02:55:11 -0400 (EDT)
Apr 28 02:55:11 z9m9z amavis[7341]: (07341-17) Checking: A2vWsL1r3nYT
[127.0.0.1] <root@xxxxxxxxxxxxxxxxxxxxxxxxxx> ->
<testit3@xxxxxxxxxxxxxxxxxxxx>
Apr 28 02:55:13 z9m9z postfix/smtpd[3363]: connect from localhost[127.0.0.1]
Apr 28 02:55:14 z9m9z postfix/smtpd[3363]: 564C049E2:
client=localhost[127.0.0.1], orig_client=unknown[127.0.0.1]
Apr 28 02:55:14 z9m9z postfix/cleanup[3354]: 564C049E2:
message-id=<20170428065511.8A0124CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Apr 28 02:55:14 z9m9z postfix/qmgr[6166]: 564C049E2:
from=<root@xxxxxxxxxxxxxxxxxxxxxxxxxx>, size=2136, nrcpt=1 (queue active)
Apr 28 02:55:14 z9m9z postfix/smtpd[3363]: disconnect from
localhost[127.0.0.1]
Apr 28 02:55:14 z9m9z amavis[7341]: (07341-17) A2vWsL1r3nYT FWD from
<root@xxxxxxxxxxxxxxxxxxxxxxxxxx> -> <testit3@xxxxxxxxxxxxxxxxxxxx>,
BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok:
queued as 564C049E2
Apr 28 02:55:14 z9m9z amavis[7341]: (07341-17) Passed CLEAN
{RelayedInbound}, [127.0.0.1] <root@xxxxxxxxxxxxxxxxxxxxxxxxxx> ->
<testit3@xxxxxxxxxxxxxxxxxxxx>, Message-ID:
<20170428065511.8A0124CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>, mail_id:
A2vWsL1r3nYT, Hits: 2.973, size: 1424, queued_as: 564C049E2, 2645 ms
Apr 28 02:55:14 z9m9z postfix/lmtp[3359]: 8A0124CDA:
to=<testit3@xxxxxxxxxxxxxxxxxxxx>, relay=127.0.0.1[127.0.0.1]:10024,
delay=3.3, delays=0.47/0.11/0.03/2.7, dsn=2.0.0, status=sent (250 2.0.0
from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 564C049E2)
Apr 28 02:55:14 z9m9z postfix/qmgr[6166]: 8A0124CDA: removed
Apr 28 02:55:15 z9m9z dovecot: dict: Error:
mysql(/var/lib/mysql/mysql.sock): Connect failed to database (postfix):
Can't connect to local MySQL server through socket
'/var/lib/mysql/mysql.sock' (13) - waiting for 1 seconds before retry
Apr 28 02:55:15 z9m9z dovecot: lda(testit3@xxxxxxxxxxxxxxxxxxxx): Error:
Internal quota calculation error
Apr 28 02:55:15 z9m9z dovecot: dict: Error:
mysql(/var/lib/mysql/mysql.sock): Connect failed to database (postfix):
Can't connect to local MySQL server through socket
'/var/lib/mysql/mysql.sock' (13) - waiting for 1 seconds before retry
Apr 28 02:55:15 z9m9z dovecot: dict: Error: dict sql lookup failed: Not
connected to database
Apr 28 02:55:15 z9m9z dovecot: lda(testit3@xxxxxxxxxxxxxxxxxxxx): Error:
Internal quota calculation error
Apr 28 02:55:15 z9m9z dovecot: lda(testit3@xxxxxxxxxxxxxxxxxxxx): sieve:
msgid=<20170428065511.8A0124CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>: stored mail
into mailbox 'INBOX'
Apr 28 02:55:15 z9m9z postfix/pipe[3370]: 564C049E2:
to=<testit3@xxxxxxxxxxxxxxxxxxxx>, relay=dovecot, delay=0.9,
delays=0.14/0.15/0/0.62, dsn=2.0.0, status=sent (delivered via dovecot
service)
Apr 28 02:55:15 z9m9z postfix/qmgr[6166]: 564C049E2: removed
I set SELinux to permissive and it works:
Apr 28 02:57:53 z9m9z postfix/pickup[1554]: DF38F4CDA: uid=0 from=<root>
Apr 28 02:57:54 z9m9z postfix/cleanup[3419]: DF38F4CDA:
message-id=<20170428065753.DF38F4CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Apr 28 02:57:54 z9m9z postfix/qmgr[6166]: DF38F4CDA:
from=<root@xxxxxxxxxxxxxxxxxxxxxxxxxx>, size=1424, nrcpt=1 (queue active)
Apr 28 02:57:54 z9m9z amavis[7342]: (07342-17) LMTP [127.0.0.1]:10024
/var/spool/amavisd/tmp/amavis-20170426T190541-07342-ifG0CeGq:
<root@xxxxxxxxxxxxxxxxxxxxxxxxxx> -> <testit3@xxxxxxxxxxxxxxxxxxxx>
SIZE=1424 Received: from z9m9z.test.htt-consult.com ([127.0.0.1]) by
localhost (z9m9z.test.htt-consult.com [127.0.0.1]) (amavisd-new, port
10024) with LMTP for <testit3@xxxxxxxxxxxxxxxxxxxx>; Fri, 28 Apr 2017
02:57:54 -0400 (EDT)
Apr 28 02:57:54 z9m9z amavis[7342]: (07342-17) Checking: wWh0cdDyySoD
[127.0.0.1] <root@xxxxxxxxxxxxxxxxxxxxxxxxxx> ->
<testit3@xxxxxxxxxxxxxxxxxxxx>
Apr 28 02:57:55 z9m9z postfix/smtpd[3427]: connect from localhost[127.0.0.1]
Apr 28 02:57:56 z9m9z postfix/smtpd[3427]: 428694AC1:
client=localhost[127.0.0.1], orig_client=unknown[127.0.0.1]
Apr 28 02:57:56 z9m9z postfix/cleanup[3419]: 428694AC1:
message-id=<20170428065753.DF38F4CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Apr 28 02:57:56 z9m9z postfix/qmgr[6166]: 428694AC1:
from=<root@xxxxxxxxxxxxxxxxxxxxxxxxxx>, size=2136, nrcpt=1 (queue active)
Apr 28 02:57:56 z9m9z postfix/smtpd[3427]: disconnect from
localhost[127.0.0.1]
Apr 28 02:57:56 z9m9z amavis[7342]: (07342-17) wWh0cdDyySoD FWD from
<root@xxxxxxxxxxxxxxxxxxxxxxxxxx> -> <testit3@xxxxxxxxxxxxxxxxxxxx>,
BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok:
queued as 428694AC1
Apr 28 02:57:56 z9m9z amavis[7342]: (07342-17) Passed CLEAN
{RelayedInbound}, [127.0.0.1] <root@xxxxxxxxxxxxxxxxxxxxxxxxxx> ->
<testit3@xxxxxxxxxxxxxxxxxxxx>, Message-ID:
<20170428065753.DF38F4CDA@xxxxxxxxxxxxxxxxxxxxxxxxxx>, mail_id:
wWh0cdDyySoD, Hits: 2.973, size: 1424, queued_as: 428694AC1, 2232 ms
Apr 28 02:57:56 z9m9z postfix/lmtp[3424]: DF38F4CDA:
to=<testit3@xxxxxxxxxxxxxxxxxxxx>, relay=127.0.0.1[127.0.0.1]:10024,
delay=2.9, delays=0.47/0.11/0.03/2.3, dsn=2.0.0, status=sent (250 2.0.0
from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 428694AC1)
Apr 28 02:57:56 z9m9z postfix/qmgr[6166]: DF38F4CDA: removed
So these additional policies stop all the memory errors, but still leave
me not working with SELinux.
When I get home Monday, I am going to rebuild the server. With my
Howtos, this is not so hard. It could be that with all the testing, I
dropped something in that I should not have.
If I still have this problem, then it is bug report time.
And then I will do it one AVC at a time with the policy building.
Again, thanks
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