This bug was fixed in the package linux - 3.13.0-119.166
---------------
linux (3.13.0-119.166) trusty; urgency=low
* linux: 3.13.0-119.166 -proposed tracker (LP: #1687718)
* CVE-2016-8645: Linux kernel mishandles socket buffer (skb) truncation
(LP: #1687107)
- rose: limit sk_filter trim to payload
- tcp: take care of truncations done by sk_filter()
linux (3.13.0-118.165) trusty; urgency=low
* linux: 3.13.0-118.165 -proposed tracker (LP: #1686154)
* linux_3.13.0-*.*: nVMX: Check current_vmcs12 before accessing in
handle_invept() (LP: #1678676)
- SAUCE: KVM has a flaw in INVEPT emulation that could crash the host
* Please backport fix to reference leak in cgroup blkio throttle
(LP: #1683976)
- block: fix module reference leak on put_disk() call for cgroups throttle
-- Thadeu Lima de Souza Cascardo <casca...@canonical.com> Tue, 02 May
2017 15:14:50 -0300
** Changed in: linux (Ubuntu Trusty)
Status: Fix Committed => Fix Released
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-8645
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https://bugs.launchpad.net/bugs/1683976
Title:
Please backport fix to reference leak in cgroup blkio throttle
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Trusty:
Fix Released
Status in linux source package in Xenial:
Fix Committed
Bug description:
This is fixed in Linux 4.5
https://github.com/torvalds/linux/commit/39a169b62b415390398291080dafe63aec751e0a
Basically the module reference will leak whenever you write to
/sys/fs/cgroup/blkio/blkio.throttle.*
$ uname -a
Linux david-kvm 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:07:41 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
$ lsmod | grep ^zfs
zfs 2813952 1
$ sudo sh -c 'i=100; while [ $i -gt 0 ]; do echo "230:0 1024" >
/sys/fs/cgroup/blkio/blkio.throttle.read_bps_device; i=$(($i - 1)); done'
$ lsmod | grep ^zfs
zfs 2813952 101
This patch should be applied to all kernel < 4.5
Thanks
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