I'll try to reproduce this bug. @joel Sing do you happen to have the
reproducer script available?
In parallel, I'll also build a Xenial test kernel with the commit posted
by @Haw Loeung in comment 4
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => High
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Xenial)
Status: New => Triaged
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
** Changed in: linux (Ubuntu)
Importance: High => Critical
** Changed in: linux (Ubuntu Xenial)
Importance: High => Critical
** Tags added: kernel-key
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https://bugs.launchpad.net/bugs/1793753
Title:
kernel panic - null pointer dereference on ipset operations
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Xenial:
Triaged
Bug description:
Hi,
We've experienced crashes on machines running iptables using ipsets.
We could get a trace from the console on one of them (attached file
kernel-trace.txt).
On these machines, some ipset commands are automatically run to update the
sets, and/or to dump them (ipset restore, swap, delete ... / ipset save).
We strongly suspect the panic is happening due to a race when ipset updates
happen at the same time as a dump.
These machines are running xenial. Before the crash, they were on
4.4.0-116-generic #140-Ubuntu, but then rebooted into
4.4.0-135-generic #161-Ubuntu.
I have an ipset save running in loops on one of these machines to try
and reproduce quicker.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1793753/+subscriptions
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