Latest 3.13 kernel update (3.13.0-46) is causing kernel panics related to IPv6

Bug #1426618 reported by Stéphane Graber on 2015-02-28
18
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Critical
Andy Whitcroft
Trusty
Critical
Andy Whitcroft

Bug Description

Hello,

Pretty similar to what happened with https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1404558 but this time with the latest 3.13.0-46.

I've been getting about daily kernel panics (three times so far).

Screenshot attached. Another user also commented in bug 1404558 about the bug being back, though I'm assuming it's a different albeit very similar one.

Stéphane Graber (stgraber) wrote :
description: updated
tags: added: kernel-key
Changed in linux (Ubuntu Trusty):
status: New → Triaged
importance: Undecided → Critical
tags: added: trusty
Andy Whitcroft (apw) on 2015-03-02
Changed in linux (Ubuntu):
assignee: nobody → Andy Whitcroft (apw)
Changed in linux (Ubuntu Trusty):
assignee: nobody → Andy Whitcroft (apw)
Andy Whitcroft (apw) wrote :

From the looks of things, when v3.13.11-ckt14 was applied which also contains the fix for the original issue, somehow the fix got applied reversed and undid the fix!

Andy Whitcroft (apw) wrote :

Ok on investigation it seems git am is broken in the sense it is quite happy to apply a fix backwards without any warning:

    $ git checkout -b TEST Ubuntu-3.13.0-45.74
    $ git format-patch -1 f34c7de1e2df67ae3e370da8f6fa37e6e3219e7b
    0001-ipv6-fix-swapped-ipv4-ipv6-mtu_reduced-callbacks.patch
    $ git am 0001-ipv6-fix-swapped-ipv4-ipv6-mtu_reduced-callbacks.patch
    Applying: ipv6: fix swapped ipv4/ipv6 mtu_reduced callbacks
    $

Wrong, wrong, wrong, wrong wrong.

Andy Whitcroft (apw) on 2015-03-02
Changed in linux (Ubuntu):
status: Triaged → Invalid
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