netdev - general protection fault in pppol2tp

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Message-ID: <001a11444d80b2a3ea0564b4ca3f@google.com>
Date:   Thu, 08 Feb 2018 07:09:01 -0800
From:   syzbot <syzbot+6e6a5ec8de31a94cd015@...kaller.appspotmail.com>
To:     davem@...emloft.net, jchapman@...alix.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: general protection fault in pppol2tp_connect

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger  
crash:

Reported-and-tested-by:  
syzbot+6e6a5ec8de31a94cd015@...kaller.appspotmail.com

Note: the tag will also help syzbot to understand when the bug is fixed.

Tested on  
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/master  
commit
617aebe6a97efa539cc4b8a52adccd89596e6be0 (Sun Feb 4 00:25:42 2018 +0000)
Merge tag 'usercopy-v4.16-rc1' of  
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

compiler: gcc (GCC) 7.1.1 20170620
Patch is attached.
Kernel config is attached.


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View attachment "patch.diff" of type "text/plain" (39010 bytes)

View attachment "config.txt" of type "text/plain" (136942 bytes)