This bug was fixed in the package mdadm - 3.3-2ubuntu7.6
---
mdadm (3.3-2ubuntu7.6) xenial; urgency=medium
* Prevent segfault when get_md_name() returns NULL
This fixes mdadm segfaults when running inside a container.
(LP: #1617919)
-- Dan Streetman
This bug was fixed in the package mdadm - 3.2.5-5ubuntu4.4
---
mdadm (3.2.5-5ubuntu4.4) trusty; urgency=medium
* Prevent segfault when get_md_name() returns NULL
This fixes mdadm segfaults when running inside a container.
(LP: #1617919)
-- Dan Streetman
>From inside xenial container, with raid array in host:
ubuntu@mdadm:~$ dpkg -l | grep mdadm
ii mdadm3.3-2ubuntu7.5
amd64tool to administer Linux MD arrays (software RAID)
ubuntu@mdadm:~$ mdadm --monitor --scan -1
Segmentation
Hello Johan, or anyone else affected,
Accepted mdadm into xenial-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/mdadm/3.3-2ubuntu7.6
in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See
** Changed in: mdadm (Ubuntu Trusty)
Status: Triaged => In Progress
** Changed in: mdadm (Ubuntu Xenial)
Status: Triaged => In Progress
** Tags removed: sts-sponsor-ddstreet
** Tags added: sts-sponsor-ddstreet-done
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** Changed in: mdadm (Ubuntu Trusty)
Assignee: Dimitri John Ledkov (xnox) => Dan Streetman (ddstreet)
** Changed in: mdadm (Ubuntu Xenial)
Assignee: Dimitri John Ledkov (xnox) => Dan Streetman (ddstreet)
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Bugs,
** Tags added: sts-sponsor-ddstreet
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https://bugs.launchpad.net/bugs/1617919
Title:
mdadm segfault error 4 in libc-2.23.so
To manage notifications about this bug go to:
** Also affects: mdadm (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: mdadm (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: mdadm (Ubuntu)
Assignee: Dan Streetman (ddstreet) => (unassigned)
** Changed in: mdadm (Ubuntu)
The attachment "lp1617919-trusty.debdiff" seems to be a debdiff. The
ubuntu-sponsors team has been subscribed to the bug report so that they
can review and hopefully sponsor the debdiff. If the attachment isn't a
patch, please remove the "patch" flag from the attachment, remove the
"patch" tag,
verified the patch fixes this on xenial and trusty using test ppa from
comment 8
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https://bugs.launchpad.net/bugs/1617919
Title:
mdadm segfault error 4 in libc-2.23.so
To manage
this is fixed upstream already by commit
https://github.com/neilbrown/mdadm/commit/1e08717f0b7856b389e9d5eb2dc330d146636183
that commit is included in zesty and later, this is needed only for
trusty and xenial
** Description changed:
- On Ubuntu 16.04.1 LTS Xenial, mdadm segfaults every day on
test ppa with fixed mdadm:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1617919
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https://bugs.launchpad.net/bugs/1617919
Title:
mdadm segfault error 4 in libc-2.23.so
To manage
** Patch added: "lp1617919-xenial.debdiff"
https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1617919/+attachment/4965923/+files/lp1617919-xenial.debdiff
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** Patch added: "lp1617919-trusty.debdiff"
https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1617919/+attachment/4965922/+files/lp1617919-trusty.debdiff
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** Changed in: mdadm (Ubuntu)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: mdadm (Ubuntu)
Importance: Undecided => Low
** Changed in: mdadm (Ubuntu)
Status: Confirmed => In Progress
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I just got the following feedback from Stéphane Graber (LXC and LXD
project leader):
"It's not a bug for it to be installed as the Ubuntu image we run is bit
for bit identical to what's run on the cloud or on physical servers and
that's on purpose.
mdadm is supposed to be configured in a way
Yes this makes a lot of sense. The situation is the same for me, but I
started automatically removing a list of packages from my lxd containers
- including mdadm. That's why the problem disappeared.
Mdadm could still make sense in a container (privileged with raw access
to devices etc.) but
Ok, I think I made some progress tracking this thing down:
On the host, where I experienced the bug, I have an LXD/LXC container running.
It turns out that mdadm is installed by default inside a container created by
"lxc launch ubunut:16.04 c1"
And when I call /etc/cron.daily/mdadm inside the
This morning I had that message for the first time (server is up with this
package setup for several days now):
Oct 28 08:25:01 apphost1 kernel: [331502.883078] mdadm[19974]: segfault at 0 ip
7f99f55d4d16 sp 75dbc7d8 error 4 in
libc-2.23.so[7f99f554a000+1c]
Versions of packages
I'm still seeing this on 4.4.0-38-generic and the same versions of libc
and mdadm that you listed in comment 2
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Title:
mdadm segfault error 4 in
With the latest updates and a reboot and a few days of uptime, the message has
not yet reappeared. This may have been fixed?
linux-image 4.4.0-36-generic
libc 2.23-0ubuntu3
mdadm 3.3-2ubuntu7.1
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: mdadm (Ubuntu)
Status: New => Confirmed
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Title:
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