-- cosmic --
ubuntu@hotdog:~$ uname -a
Linux hotdog 4.18.0-12-generic #13-Ubuntu SMP Wed Nov 14 15:16:52 UTC 2018
aarch64 aarch64 aarch64 GNU/Linux
ubuntu@hotdog:~$
ubuntu@hotdog:~$ for i in {1..500}; do sudo modprobe -r ipmi_ssif; sleep 2s ;
sudo modprobe ipmi_ssif || exit; done
ubuntu@hotdog:~$
Test completed with no kernel panics.
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https://bugs.launchpad.net/bugs/1799281
Title:
[Bionic][Cosmic] ipmi: Fix timer race with module unload
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed
Bug description:
[Impact]
If you attempt to remove and insert the ipmi_ssif module a number of times,
it would result in a kernel panic. This is due to mod_timer from arming a timer
that was already removed by del_timer during module unload.
[Fix]
In linux-next:
0711e8c1b457 ipmi: Fix timer race with module unload
[Test]
-- Test Case --
for i in {1..500}; do sudo modprobe -r ipmi_ssif; sleep 2s ; sudo modprobe
ipmi_ssif || exit; done
----------------
After the patch was applied, no kernel panics were obsereved. Tested on
Cavium ThunderX2.
[Regression Risk]
The patch was applied to bionic and tested tested on a Cavium ThunderX2 and
no regressions were found. Risk of regression none.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799281/+subscriptions
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