GNU GRUB - Bugs: bug #59887, potential truncation of mdraid...
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bug #59887: potential truncation of mdraid device list
Submitter: | Kees Cook <keescook> | ||
Submitted: | Sat 16 Jan 2021 10:49:30 AM UTC | ||
Category: | Installation | Severity: | Major |
Priority: | 5 - Normal | Item Group: | None |
Status: | None | Privacy: | Public |
Assigned to: | None | Originator Name: | |
Open/Closed: | Open | Release: | 2.02 |
Release: | Reproducibility: | Every Time | |
Planned Release: | None |
Attached Files
file #50725: fix-md-array-enumeration.patch added by keescook (1KiB - text/x-patch - also fix the indexing)
Depends on the following items: None found
Items that depend on this one: None found
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Follow 2 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2021-01-16 | keescook | Attached File | - | Added fix-md-array-enumeration.patch, #50725 | |
2021-01-16 | keescook | Attached File | - | Added fix-md-array-list-truncation.patch, #50724 |
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Corresponding source code
The consumer of grub_util_raid_getmembers() expects a NULL terminated list of device names. It has no idea about how many devices are registered in the array; it only cares about active devices. As a result, there cannot be gaps in the list, otherwise the first listed inactive device will cause all remaining devices to effectively vanish. This is especially troublesome if a root filesystem were on an array with the first device being a hot spare: the array would appear to have no disks and the root filesystem would become invisible to grub.
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1912043