This bug was fixed in the package linux - 4.4.0-28.47
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linux (4.4.0-28.47) xenial; urgency=low
[ Luis Henriques ]
* Release Tracking Bug
- LP: #1595874
* Linux netfilter local privilege escalation issues (LP: #1595350)
- netfilter: x_tables: don't move to
This bug was fixed in the package linux - 4.4.0-25.44
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linux (4.4.0-25.44) xenial; urgency=low
[ Kamal Mostafa ]
* Release Tracking Bug
- LP: #1591289
* Xenial update to v4.4.13 stable release (LP: #1590455)
- MIPS64: R6: R2 emulation bugfix
- MIPS: math-emu:
Verified with the test script of #5. Kernel in -proposed solves the
problem.
Steps used:
1. Verified that release kernel 4.4.0-24-generic still had the problem.
2. Verified that kernel 4.4.0.25 from -proposed contains the resolution:
# apt-get install -s -t xenial-proposed
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'.
If verification is not done by 5 working days from
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1584052
Title:
btrfs: file write crashes with false ENOSPC
** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1584052
Title:
btrfs: file write crashes with false
Hope the SRU will be accepted quickly. Should be the case, since this
issue causes loss of user data as applications will have no reason to
retry files writes under out of space conditions.
Thanks for the quick and professional cooperation!
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That is great news. I'll submit an SRU request for Xenial.
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https://bugs.launchpad.net/bugs/1584052
Title:
btrfs: file write crashes with false ENOSPC during snapshot
Another 24 error-free hours on the server with the test kernel running
the MySQL/Icinga2 combination and creating btrfs snapshots every 5
minutes.
I'd like to add that this server, which previously experienced frequent false
ENOSPC conditions with the Xenial release kernel, used a fairly plain
The Xenial test kernel with a pick of 4da2e26 resolves the bug, no
negative side effects were encountered.
With the Xenial release kernel, there were 18 MySQL server crashes in a
24 hour period due to false ENOSPC indications. With the test kernel,
not a single crash occured in a 24 hour period.
I have now installed the kernel image on a server which previously
experienced MySQL crashes every 1 to 2 hours. The server uses MySQL for
an Icinga2 monitoring database (so it's frequently writing) and is
configured to create btrfs snapshots every 5 minutes.
# cat /proc/version
Linux version
The commit in mainline is:
4da2e26 btrfs: Continue write in case of can_not_nocow
I built a Xenial test kernel with a pick of 4da2e26. The test kernel can be
downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1584052/
Can you test this kernel and see if it resolves this bug?
** Changed
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Tags added: kernel-da-key
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https://bugs.launchpad.net/bugs/1584052
Title:
btrfs: file write crashes with
There is no matching report in /var/crash. The bug is already diagnosed
and fixed upstream, and may be reproduced with the information provided
in https://patchwork.kernel.org/patch/7967161/
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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