** Description changed: + [Original Description] + Fresh install of 18.04 server. Every 5 minutes postconf segfaults: - Mar 5 14:30:05 hostname-here kernel: [ 672.082204] postconf[12975]: segfault at 40 ip 0000564d613ff053 sp 00007ffc39e19b90 error 4 in postconf[564d613e7000+25000] - Mar 5 14:30:06 hostname-here kernel: [ 672.303499] postconf[13004]: segfault at 40 ip 000055b29d0f8053 sp 00007fff72f4b740 error 4 in postconf[55b29d0e0000+25000] + Mar 5 14:30:05 hostname-here kernel: [ 672.082204] postconf[12975]: segfault at 40 ip 0000564d613ff053 sp 00007ffc39e19b90 error 4 in postconf[564d613e7000+25000] + Mar 5 14:30:06 hostname-here kernel: [ 672.303499] postconf[13004]: segfault at 40 ip 000055b29d0f8053 sp 00007fff72f4b740 error 4 in postconf[55b29d0e0000+25000] According to Apport log, the crash is caused by following command line: postconf -h queue_directory Running the command in shell however works as expected and lists the default spool directory (/var/spool/postfix). ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: postfix 3.3.0-1 ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3 Uname: Linux 4.15.0-10-generic x86_64 ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 - Date: Mon Mar 5 14:26:27 2018 + Date: Mon Mar 5 14:26:27 2018 SourcePackage: postfix UpgradeStatus: No upgrade log present (probably fresh install) + + + [Impact] + + Postfix segfaults when it can't read a map file. + + Any users without access to the file will get a core dump when running + postfix. + + This fix checks that the file was successfully opened before doing any + other checks. + + [Test Case] + + lxc launch ubuntu:bionic builder + lxc exec builder bash + + apt dist-upgrade + apt install -y postfix + + echo "query = SELECT real_address from tempmail where time_expires>now() and temp_address='%s'; + user = username-here + password = password-here + dbname = postfix + hosts = ip-here" >/etc/postfix/valiases.cf + chmod 0600 /etc/postfix/valiases.cf + echo "virtual_alias_maps = pgsql:/etc/postfix/valiases.cf" >> /etc/postfix/main.cf + useradd test + su - test + /usr/sbin/postconf virtual_alias_map + + [Regression Potential] + + The only change is to short-circuit the error checking code early if the + file cannot be opened for any reason. This should not cause regressions, + as the alternative is to crash when it attempts to read a bad file + descriptor.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1753470 Title: Postconf segfaults every 5 minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1753470/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
