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When handling a regular LVM volume, GRUB can fail with the message: error: disk `lvmid/******-****-****-****-****-****-****/******-****-****-****-****-****-******' not found. If the condition which triggers this exists, grub-probe will report the error mentioned above. Similarly, the GRUB boot code will fail to detect LVM volumes, resulting in a failure to boot off of LVM disks/partitions. The condition can be created on any LVM VG by an LVM configuration change, so any system with /boot on LVM can become unbootable at "any" time (after any LVM configuration change). The problem is caused by an incorrect computation of mda_end in disk/lvm.c, when the metadata area wraps around. Apparently, this can start happening at around 220 metadata changes to the VG. Fixes: 879c4a834 (lvm: Fix two more potential data-dependent alloc overflows) Fixes: https://savannah.gnu.org/bugs/?61620 Signed-off-by: Rogier <rogier777@gmail.com> Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Tested-By: Michael Chang <mchang@suse.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'