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

Bug #1426618 reported by Stéphane Graber
18
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Invalid
Critical
Andy Whitcroft
Trusty
Triaged
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.

Revision history for this message
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)
Changed in linux (Ubuntu):
assignee: nobody → Andy Whitcroft (apw)
Changed in linux (Ubuntu Trusty):
assignee: nobody → Andy Whitcroft (apw)
Revision history for this message
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!

Revision history for this message
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)
Changed in linux (Ubuntu):
status: Triaged → Invalid
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