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Date:	Wed, 3 Feb 2016 11:04:31 +1100
From:	Stephen Hemminger <>
Subject: Fw: [Bug 111771] New: deadlock in ppp/l2tp

Please excuse URL mangling, my bugzilla address appears to route through
stupid corporate firewall.

Begin forwarded message:

Date: Tue, 2 Feb 2016 18:38:41 +0000
From: "" <>
To: "" <>
Subject: [Bug 111771] New: deadlock in ppp/l2tp 

            Bug ID: 111771
           Summary: deadlock in ppp/l2tp
           Product: Networking
           Version: 2.5
    Kernel Version: 4.3.2
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
        Regression: No

Created attachment 202771
kernel.log, config, cpuinfo

I'm getting a deadlock and the computer is unresponsive shortly after setting
up a xl2tpd/ipsec vpn connection. The deadlock occurs every time, it is very
reproducible on my computer.

It is the mainline kernel, version 4.3.2.

The processor is given in a copy /proc/cpuinfo that I've attached.

Linux version 4.3.2 (gcc version 5.3.1 20160121 (Debian 5.3.1-7) ) #5 SMP
PREEMPT Sat Jan 30 00:05:40 CET 2016

ppp is from the debian package of their unstable distribution:

I've attached the kernel config file and the kernel log.

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You are the assignee for the bug.

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