Public bug reported:
[Impact]
Multiple disks in a system can end up having the same BY_PATH name, making the
corresponding symlinks in /dev/disk/by-path non-unique. This can result in a
user performing an operation on the wrong disk, possibly resulting in data loss.
[Test Case]
$ ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root 9 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0 -> ../../sdb
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part2 -> ../../sdb2
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part3 -> ../../sdc3
Notice that there is no symlink for /dev/sdc.
[Fix]
ffeafdd2bf0b2 scsi: libsas: Fix rphy phy_identifier for PHYs with end devices
attached
[Regression Risk]
This may change the by-path symlinks for disks on the system. While the new
name would be the correct one - users maybe relying on the incorrect version.
This could result in an unbootable system, requiring manual intervention to
repair.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Affects: linux (Ubuntu Xenial)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: New
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Affects: linux (Ubuntu Cosmic)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Affects: linux (Ubuntu Disco)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => dann frazier (dannf)
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => dann frazier (dannf)
** Changed in: linux (Ubuntu Cosmic)
Assignee: (unassigned) => dann frazier (dannf)
** Changed in: linux (Ubuntu Disco)
Status: New => In Progress
** Changed in: linux (Ubuntu Cosmic)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1817784
Title:
libsas disks can have non-unique by-path names
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Xenial:
New
Status in linux source package in Bionic:
In Progress
Status in linux source package in Cosmic:
In Progress
Status in linux source package in Disco:
In Progress
Bug description:
[Impact]
Multiple disks in a system can end up having the same BY_PATH name, making
the corresponding symlinks in /dev/disk/by-path non-unique. This can result in
a user performing an operation on the wrong disk, possibly resulting in data
loss.
[Test Case]
$ ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root 9 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0 -> ../../sdb
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part2 -> ../../sdb2
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part3 -> ../../sdc3
Notice that there is no symlink for /dev/sdc.
[Fix]
ffeafdd2bf0b2 scsi: libsas: Fix rphy phy_identifier for PHYs with end devices
attached
[Regression Risk]
This may change the by-path symlinks for disks on the system. While the new
name would be the correct one - users maybe relying on the incorrect version.
This could result in an unbootable system, requiring manual intervention to
repair.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1817784/+subscriptions
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