Hello Phil, or anyone else affected, Accepted lxc into oracular-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lxc/1:6.0.1-1ubuntu1.1 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- oracular to verification-done-oracular. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-oracular. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: lxc (Ubuntu Oracular) Status: In Progress => Fix Committed ** Tags added: verification-needed verification-needed-oracular ** Changed in: lxc (Ubuntu Noble) Status: In Progress => Fix Committed ** Tags added: verification-needed-noble -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/2081762 Title: [SRU] lxc-excecute NULL pointer dereference causes segfault when sharing rootfs with host Status in lxc: Fix Released Status in lxc package in Ubuntu: Fix Released Status in lxc source package in Noble: Fix Committed Status in lxc source package in Oracular: Fix Committed Status in lxc source package in Plucky: Fix Released Status in lxc package in Debian: New Bug description: [ Impact ] lxc-execute will crash with a segfault if the user tries to use the host rootfs as a shared rootfs. $ sudo lxc-execute -n lxc-test-1 -f lxc.conf -l TRACE -- ls /usr Segmentation fault [ Test Plan ] install lxc $ cat > lxc.conf <<EOF lxc.uts.name=lxc-test-1 lxc.net.0.type = empty lxc.console.path = none lxc.tty.max = 1 lxc.pty.max = 128 lxc.mount.auto = proc:rw sys cgroup lxc.autodev = 1 EOF $ sudo lxc-execute -n lxc-test-1 -f lxc.conf -l TRACE -- ls /usr If the package is fixed, it will display output from 'ls'. [ Where problems could occur ] This is an upstream patch which is only checking if a pointer is not NULL before dereferencing it. There is no other change in the code apart from this pointer check. There is very minimum chance of any regression due to this change. [ Other Info ] It is now fixed in Plucky. Even though Debian has an updated 1:6.0.2-1, but the issue is still reproducible on Debian. [ Original Bug Description ] lsb_release -rd: Description: Ubuntu 24.04.1 LTS Release: 24.04 lxc-start --version: 5.0.3 Issue: lxc-execute segfaults when using a shared host rootfs due to a NULL pointer deference. In lxc/src/lxc/conf.c - lines 339 - 344 The call to lxc_storage_prepare detects no rootfs path and returns without calling storage_init In lxc/src/lxc/conf.c - lines 293 - 310 leaving rootfs->storage null. Then dereferencing rootfs->storage->type causes a segfault. Steps to reproduce: 1. use lxc.conf: lxc.uts.name=lxc-test-1 lxc.net.0.type = empty lxc.console.path = none lxc.tty.max = 1 lxc.pty.max = 128 lxc.mount.auto = proc:rw sys cgroup lxc.autodev = 1 2. Run: $ sudo lxc-execute -n lxc-test-1 -f lxc.conf -l TRACE -- ls /dev Segmentation fault I've attached a patch as a possible fix. Running the same example above with the patch applied runs without crashing. To manage notifications about this bug go to: https://bugs.launchpad.net/lxc/+bug/2081762/+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
