Public bug reported: Starting with kernel 4.15.0-44 ext4 filesystem with meta_bg feature enabled can no longer be mounted.
Steps to reproduce: - create two empty file and setup loopback devices on these files dd if=/dev/zero of=/loop1 bs=1M count=50 losetup /dev/loop1 /loop1 dd if=/dev/zero of=/loop2 bs=1M count=50 losetup /dev/loop2 /loop2 - create a ext4 fs with meta_bg enabled on loop1: mkfs.ext4 -O ^resize_inode,+meta_bg /dev/loop1 - create a ext4 fs without any options on loop2: mkfs.ext4 /dev/loop2 - try to mount the filesystems mkdir /mnt/loop1 mkdir /mnt/loop2 mount /dev/loop1 /mnt/loop1 mount /dev/loop1 /mnt/loop2 Expected behaviour: All mounts succeed without error. Actual behaviour: root@xubu-18-04:~# mount /dev/loop1 /mnt/loop1 mount: /mnt/loop1: mount(2) system call failed: Structure needs cleaning. See also a similar bug in fedora and debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903838 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903838 with a suspected patch by Theodore Ts'o to fix the issue: (Not tested) https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=903838;filename=ext4-fix-false-negatives-and-false-positives-in-ext4.patch;msg=26 Additional info: root@xubu-18-04:~# lsb_release -rd Description: Ubuntu 18.04.1 LTS Release: 18.04 root@xubu-18-04:~# apt-cache policy linux-image-generic linux-image-generic: Installed: 4.15.0.44.46 Candidate: 4.15.0.44.46 Version table: *** 4.15.0.44.46 500 500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages 100 /var/lib/dpkg/status 4.15.0.20.23 500 500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 Packages ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813727 Title: kernel 4.15.0-44 cannot mount ext4 fs with meta_bg enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813727/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
