** Changed in: linux-snapdragon (Ubuntu Precise)
Status: New => Invalid
** Changed in: linux-snapdragon (Ubuntu Precise)
Importance: Undecided => Medium
** Changed in: linux-snapdragon (Ubuntu Wily)
Status: New => Invalid
** Changed in: linux-snapdragon (Ubuntu Wily)
Importance: Undecided => Medium
** Changed in: linux-snapdragon (Ubuntu Xenial)
Status: New => Invalid
** Changed in: linux-snapdragon (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: linux-snapdragon (Ubuntu Yakkety)
Status: New => Invalid
** Changed in: linux-snapdragon (Ubuntu Yakkety)
Importance: Undecided => Medium
** Changed in: linux-snapdragon (Ubuntu Trusty)
Status: New => Invalid
** Changed in: linux-snapdragon (Ubuntu Trusty)
Importance: Undecided => Medium
** Description changed:
- hrtimer_cancel() waits for the completion from the callback, thus it
- must not be called inside the callback itself. This was already a
- problem in the past with ALSA hrtimer driver, and the early commit
- [fcfdebe70759: ALSA: hrtimer - Fix lock-up] tried to address it.
- However, the previous fix is still insufficient: it may still cause a
- lockup when the ALSA timer instance reprograms itself in its callback.
- Then it invokes the start function even in snd_timer_interrupt() that is
- called in hrtimer callback itself, results in a CPU stall. This is no
- hypothetical problem but actually triggered by syzkaller fuzzer.
+ sound/core/hrtimer.c in the Linux kernel before 4.4.1 does not prevent
+ recursive callback access, which allows local users to cause a denial of
+ service (deadlock) via a crafted ioctl call. However, the previous fix
+ is still insufficient: it may still cause a lockup when the ALSA timer
+ instance reprograms itself in its callback. Then it invokes the start
+ function even in snd_timer_interrupt() that is called in hrtimer
+ callback itself, results in a CPU stall. This is no hypothetical problem
+ but actually triggered by syzkaller fuzzer.
Break-Fix: - 2ba1fe7a06d3624f9a7586d672b55f08f7c670f3
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-armadaxp in Ubuntu.
https://bugs.launchpad.net/bugs/1549200
Title:
CVE-2016-2549
Status in linux package in Ubuntu:
Invalid
Status in linux-armadaxp package in Ubuntu:
Invalid
Status in linux-flo package in Ubuntu:
New
Status in linux-goldfish package in Ubuntu:
New
Status in linux-lts-quantal package in Ubuntu:
Invalid
Status in linux-lts-raring package in Ubuntu:
Invalid
Status in linux-lts-saucy package in Ubuntu:
Invalid
Status in linux-lts-trusty package in Ubuntu:
Invalid
Status in linux-lts-utopic package in Ubuntu:
Invalid
Status in linux-lts-vivid package in Ubuntu:
Invalid
Status in linux-lts-wily package in Ubuntu:
Invalid
Status in linux-lts-xenial package in Ubuntu:
Invalid
Status in linux-mako package in Ubuntu:
New
Status in linux-manta package in Ubuntu:
Invalid
Status in linux-raspi2 package in Ubuntu:
Fix Committed
Status in linux-snapdragon package in Ubuntu:
Invalid
Status in linux-ti-omap4 package in Ubuntu:
Invalid
Status in linux source package in Precise:
Fix Committed
Status in linux-armadaxp source package in Precise:
New
Status in linux-flo source package in Precise:
Invalid
Status in linux-goldfish source package in Precise:
Invalid
Status in linux-lts-quantal source package in Precise:
Invalid
Status in linux-lts-raring source package in Precise:
Invalid
Status in linux-lts-saucy source package in Precise:
Invalid
Status in linux-lts-trusty source package in Precise:
Fix Released
Status in linux-lts-utopic source package in Precise:
Invalid
Status in linux-lts-vivid source package in Precise:
Invalid
Status in linux-lts-wily source package in Precise:
Invalid
Status in linux-lts-xenial source package in Precise:
Invalid
Status in linux-mako source package in Precise:
Invalid
Status in linux-manta source package in Precise:
Invalid
Status in linux-raspi2 source package in Precise:
Invalid
Status in linux-snapdragon source package in Precise:
Invalid
Status in linux-ti-omap4 source package in Precise:
Fix Committed
Status in linux source package in Trusty:
Fix Released
Status in linux-armadaxp source package in Trusty:
Invalid
Status in linux-flo source package in Trusty:
Invalid
Status in linux-goldfish source package in Trusty:
Invalid
Status in linux-lts-quantal source package in Trusty:
Invalid
Status in linux-lts-raring source package in Trusty:
Invalid
Status in linux-lts-saucy source package in Trusty:
Invalid
Status in linux-lts-trusty source package in Trusty:
Invalid
Status in linux-lts-utopic source package in Trusty:
Fix Released
Status in linux-lts-vivid source package in Trusty:
Fix Released
Status in linux-lts-wily source package in Trusty:
Fix Released
Status in linux-lts-xenial source package in Trusty:
Fix Committed
Status in linux-mako source package in Trusty:
Invalid
Status in linux-manta source package in Trusty:
Invalid
Status in linux-raspi2 source package in Trusty:
Invalid
Status in linux-snapdragon source package in Trusty:
Invalid
Status in linux-ti-omap4 source package in Trusty:
Invalid
Status in linux source package in Vivid:
New
Status in linux-armadaxp source package in Vivid:
New
Status in linux-flo source package in Vivid:
New
Status in linux-goldfish source package in Vivid:
New
Status in linux-lts-quantal source package in Vivid:
New
Status in linux-lts-raring source package in Vivid:
New
Status in linux-lts-saucy source package in Vivid:
New
Status in linux-lts-trusty source package in Vivid:
New
Status in linux-lts-utopic source package in Vivid:
New
Status in linux-lts-vivid source package in Vivid:
New
Status in linux-lts-wily source package in Vivid:
New
Status in linux-lts-xenial source package in Vivid:
New
Status in linux-mako source package in Vivid:
New
Status in linux-manta source package in Vivid:
New
Status in linux-raspi2 source package in Vivid:
New
Status in linux-snapdragon source package in Vivid:
New
Status in linux-ti-omap4 source package in Vivid:
New
Status in linux source package in Wily:
Fix Released
Status in linux-armadaxp source package in Wily:
Invalid
Status in linux-flo source package in Wily:
New
Status in linux-goldfish source package in Wily:
New
Status in linux-lts-quantal source package in Wily:
Invalid
Status in linux-lts-raring source package in Wily:
Invalid
Status in linux-lts-saucy source package in Wily:
Invalid
Status in linux-lts-trusty source package in Wily:
Invalid
Status in linux-lts-utopic source package in Wily:
Invalid
Status in linux-lts-vivid source package in Wily:
Invalid
Status in linux-lts-wily source package in Wily:
Invalid
Status in linux-lts-xenial source package in Wily:
Invalid
Status in linux-mako source package in Wily:
New
Status in linux-manta source package in Wily:
New
Status in linux-raspi2 source package in Wily:
Fix Released
Status in linux-snapdragon source package in Wily:
Invalid
Status in linux-ti-omap4 source package in Wily:
Invalid
Status in linux source package in Xenial:
Invalid
Status in linux-armadaxp source package in Xenial:
Invalid
Status in linux-flo source package in Xenial:
New
Status in linux-goldfish source package in Xenial:
New
Status in linux-lts-quantal source package in Xenial:
Invalid
Status in linux-lts-raring source package in Xenial:
Invalid
Status in linux-lts-saucy source package in Xenial:
Invalid
Status in linux-lts-trusty source package in Xenial:
Invalid
Status in linux-lts-utopic source package in Xenial:
Invalid
Status in linux-lts-vivid source package in Xenial:
Invalid
Status in linux-lts-wily source package in Xenial:
Invalid
Status in linux-lts-xenial source package in Xenial:
Invalid
Status in linux-mako source package in Xenial:
New
Status in linux-manta source package in Xenial:
Invalid
Status in linux-raspi2 source package in Xenial:
Fix Committed
Status in linux-snapdragon source package in Xenial:
Invalid
Status in linux-ti-omap4 source package in Xenial:
Invalid
Status in linux source package in Yakkety:
Invalid
Status in linux-armadaxp source package in Yakkety:
Invalid
Status in linux-flo source package in Yakkety:
New
Status in linux-goldfish source package in Yakkety:
New
Status in linux-lts-quantal source package in Yakkety:
Invalid
Status in linux-lts-raring source package in Yakkety:
Invalid
Status in linux-lts-saucy source package in Yakkety:
Invalid
Status in linux-lts-trusty source package in Yakkety:
Invalid
Status in linux-lts-utopic source package in Yakkety:
Invalid
Status in linux-lts-vivid source package in Yakkety:
Invalid
Status in linux-lts-wily source package in Yakkety:
Invalid
Status in linux-lts-xenial source package in Yakkety:
Invalid
Status in linux-mako source package in Yakkety:
New
Status in linux-manta source package in Yakkety:
Invalid
Status in linux-raspi2 source package in Yakkety:
Fix Committed
Status in linux-snapdragon source package in Yakkety:
Invalid
Status in linux-ti-omap4 source package in Yakkety:
Invalid
Bug description:
sound/core/hrtimer.c in the Linux kernel before 4.4.1 does not prevent
recursive callback access, which allows local users to cause a denial
of service (deadlock) via a crafted ioctl call. However, the previous
fix is still insufficient: it may still cause a lockup when the ALSA
timer instance reprograms itself in its callback. Then it invokes the
start function even in snd_timer_interrupt() that is called in hrtimer
callback itself, results in a CPU stall. This is no hypothetical
problem but actually triggered by syzkaller fuzzer.
Break-Fix: - 2ba1fe7a06d3624f9a7586d672b55f08f7c670f3
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1549200/+subscriptions
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