** Description changed: + [Impact] + In systemd prior to 234 a race exists between .mount and .automount units such that automount requests from kernel may not be serviced by systemd resulting in kernel holding the mountpoint and any processes that try to use said mount will hang. A race like this may lead to denial of service, until mount points are unmounted. + + [Testcase] + Create a race between .mount and .automount units, such that automout request is serviced after .mount unit has been started. Observe a hang. + More detailed steps are available at https://github.com/systemd/systemd/pull/5916 + + [Butfix] + Cherrypick upstream commit https://github.com/systemd/systemd/commit/e7d54bf58789545a9eb0b3964233defa0b007318 + + [Regression Potential] + The underlying logic of starting/stopping/triggering units is unchanged. However, there the logic as to when to send automout_send_ready() is relaxed, such that it is always sent whenever unit is already mounted. This is done to explicitly cope with late arrival of the incoming [aircraft] automount request. + + [Original Bug report / request] + Hi, We have a blocking issue in systemd for the following release ``` NAME="Ubuntu" VERSION="16.04.3 LTS (Xenial Xerus)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 16.04.3 LTS" VERSION_ID="16.04" HOME_URL="http://www.ubuntu.com/"; SUPPORT_URL="http://help.ubuntu.com/"; BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"; VERSION_CODENAME=xenial UBUNTU_CODENAME=xenial ``` This release runs systemd229, we are affected by the following auto- mouting race condition ``` https://github.com/systemd/systemd/pull/5916 ``` Is back porting the fix to the release 229 an option? Regards.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1709649 Title: 229 backport for race between explicit mount and handling automount To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1709649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
