Public bug reported: 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. ** Affects: lxc (Ubuntu) Importance: Undecided Status: New ** Patch added: "Potential fix for the described issue." https://bugs.launchpad.net/bugs/2081762/+attachment/5821233/+files/ubuntu-24.04-lxc-shared-rootfs-null-dereference.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2081762 Title: lxc-excecute NULL pointer dereference causes segfault when sharing rootfs with host To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/2081762/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs