A brief update: I can also reproducee the crash on Ubuntu 21.10 / e2fsck 1.46.3:
# e2fsck -v -z e2fsck.undofile.2022-03-20 /dev/mapper/md125_crypt e2fsck 1.46.3 (27-Jul-2021) Overwriting existing filesystem; this can be undone using the command: e2undo e2fsck.undofile.2022-03-20 /dev/mapper/md125_crypt ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap e2fsck: Group descriptors look bad... trying backup blocks... Signal (11) SIGSEGV si_code=SEGV_MAPERR fault addr=0x178 e2fsck(+0x31e3e)[0x55deba41ce3e] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7fc444c0a520] /lib/x86_64-linux-gnu/libext2fs.so.2(ext2fs_close2+0x134)[0x7fc444e59b44] /lib/x86_64-linux-gnu/libext2fs.so.2(ext2fs_close_free+0x1a)[0x7fc444e59bba] e2fsck(main+0xebd)[0x55deba3fcb6d] /lib/x86_64-linux-gnu/libc.so.6(+0x29fd0)[0x7fc444bf1fd0] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x7d)[0x7fc444bf207d] e2fsck(_start+0x25)[0x55deba3feff5] If I run "e2fsck -v /dev/mapper/md125_crypt" (without -z), e2fsck 1.46.3 does not crash. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1962789 Title: e2fsck crashes with Signal (11) SIGSEGV when using undo-file To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1962789/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs