Thank you both very much for the responses. Toru: I just tested this on another 16.04 system (now with kernel 4.4.0-142-generic) and was unable to reproduce the issue there also. I was able to reproduce the issue on both Bionic systems I tested however. So there seems to be a difference between Xenial and Bionic.
Patrik: I believe LTS patches are required to be as minimal as possible to minimize regression risk. It appears that the bug is resolved without the change you mentioned. I looked at the code quickly and couldn't determine whether this change is strictly necessary as the variable that is initialized doesn't seem to be used within the module itself. Should you disagree, then please report back. I would like to ask a sponsor to review the debdiff and give feedback about what changes are desired to get the patch accepted. I will then also test the disco release. Any feedback or additional information is more than welcome, I'm just trying to move this issue forward as well as I can. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pam in Ubuntu. https://bugs.launchpad.net/bugs/1666203 Title: pam_tty_audit failed in pam_open_session Status in pam package in Ubuntu: Triaged Status in pam package in Debian: New Bug description: Dear Maintainer. I found a bug in pam_tty_audit. When Using the pam_tty_audit with other pam modules(ex, pam_ldap), it failed in pam_open_session. It was triggared by use uninitialized variable in pam_tty_audit.c::pam_open_session. * Enviroments Ubuntu 14.04.4 LTS linux-image-3.16.0-71-generic 3.16.0-71.92~14.04.1 libpam-ldap:amd64 184-8.5ubuntu3 libpam-modules:amd64 1.1.8-1ubuntu2.2 Ubuntu 16.04.2 TLS linux-image-4.4.0-62-generic 4.4.0-62.83 libpam-ldap:amd64 184-8.7ubuntu1 libpam-modules:amd64 1.1.8-3.2ubuntu2 * Reproduction method 1. Install libpam-ldap. 2. Add the following to the end of /etc/pam.d/common-sessions -------- session required pam_tty_audit.so enable=* open_only -------- 3. When logging in with ssh etc., pam_tty_audit will fail and login fails * Solution (== 2018/04/16 Link updated ==) apply upstream patch https://github.com/linux-pam/linux-pam/commit/c5f829931a22c65feffee16570efdae036524bee * Logs (on Ubuntu14.04) -- auth.log -- May 18 14:47:03 vm sshd[2272]: Accepted publickey for test from 10.99.0.1 port 51398 ssh2: RSA 8f:39:1c:3a:f4:9d:ca:99:67:fc:e3:fd:1e:0c:5b:a8 May 18 14:47:03 vm sshd[2272]: pam_unix(sshd:session): session opened for user test by (uid=0) May 18 14:47:03 vm sshd[2272]: pam_tty_audit(sshd:session): error setting current audit status: Invalid argument May 18 14:47:03 vm sshd[2272]: error: PAM: pam_open_session(): Cannot make/remove an entry for the specified session May 18 14:47:03 vm sshd[2297]: Received disconnect from 10.99.0.1: 11: disconnected by user -- syslog -- May 18 14:47:03 vm audispd: node=vm type=USER_ACCT msg=audit(1463550423.399:58): pid=2272 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:accounting acct="test" exe="/usr/sbin/sshd" hostname=10.99.0.1 addr=10.99.0.1 terminal=ssh res=success' May 18 14:47:03 vm audispd: node=vm type=CRED_ACQ msg=audit(1463550423.403:59): pid=2272 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:setcred acct="test" exe="/usr/sbin/sshd" hostname=10.99.0.1 addr=10.99.0.1 terminal=ssh res=success' May 18 14:47:03 vm audispd: node=vm type=LOGIN msg=audit(1463550423.403:60): pid=2272 uid=0 old-auid=4294967295 auid=20299 old-ses=4294967295 ses=3 res=1 May 18 14:47:03 vm audispd: node=vm type=CONFIG_CHANGE msg=audit(1463550423.403:61): pid=2272 uid=0 auid=20299 ses=3 op=tty_set old-enabled=0 new-enabled=1 old-log_passwd=0 new-log_passwd=32743 res=0 May 18 14:47:03 vm audispd: node=vm type=USER_START msg=audit(1463550423.447:62): pid=2272 uid=0 auid=20299 ses=3 msg='op=PAM:session_open acct="test" exe="/usr/sbin/sshd" hostname=10.99.0.1 addr=10.99.0.1 terminal=ssh res=failed' May 18 14:47:03 vm audispd: node=vm type=CRED_ACQ msg=audit(1463550423.447:63): pid=2297 uid=0 auid=20299 ses=3 msg='op=PAM:setcred acct="test" exe="/usr/sbin/sshd" hostname=10.99.0.1 addr=10.99.0.1 terminal=ssh res=success' May 18 14:47:03 vm audispd: node=vm type=CRED_DISP msg=audit(1463550423.451:64): pid=2272 uid=0 auid=20299 ses=3 msg='op=PAM:setcred acct="test" exe="/usr/sbin/sshd" hostname=10.99.0.1 addr=10.99.0.1 terminal=ssh res=success' Thanks regards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pam/+bug/1666203/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
