Re: kern/52353: [netbsd-8] A crash in icmpv6 code (?)

[Dominik Bialy <dmb%yenn.ulegend.net@localhost>]

On Sun, Jul 02, 2017 at 11:35:01PM +0000, Kengo NAKAHARA wrote:
> The following reply was made to PR kern/52353; it has been noted by GNATS.
> 
> From: Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>
> To: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
>         netbsd-bugs%netbsd.org@localhost
> Cc: 
> Subject: Re: kern/52353: [netbsd-8] A crash in icmpv6 code (?)
> Date: Mon, 3 Jul 2017 08:33:32 +0900
> 
>  Hi,
>  
>  On 2017/07/01 22:40, dmb%yenn.ulegend.net@localhost wrote:
>  > System: NetBSD yenn 8.0_BETA NetBSD 8.0_BETA (YENN) #6: Mon Jun 26 08:49:07 UTC 2017 builds@yenn:/var/obj/sys/arch/amd64/compile/YENN amd64
>  
>  It seems you use other than GENERIC kernel config.Could you show your
>  kernel config?
>  
It is almost GENERIC with: GATEWAY, and altq* options added.  The setup
is somewhat unusual, since I'm using ipf+pf+the old altq

Here's the config:

http://yenn.ulegend.net/~dmb/YENN

Here's dmesg.boot:

http://yenn.ulegend.net/~dmb/dmesg.boot

(The panic in this dmesg is probably unrelated.)

In altq I'm using WFQ over a 0.75 Mbps uplink.

>  > Architecture: x86_64
>  > Machine: amd64
>  >> Description:
>  > yenn# crash -M netbsd.3.core -N netbsd.3
>  > Crash version 8.0_BETA, image version 8.0_BETA.
>  > System panicked: in6_cksum: mbuf too short for IPv6 header
>  > Backtrace from time of crash is available.
>  > crash> bt
>  > _KERNEL_OPT_NARCNET() at 0
>  > ?() at fffffe80a11bcc00
>  > vpanic() at vpanic+0x149
>  > snprintf() at snprintf
>  > in6_cksum() at in6_cksum+0x1a2
>  > _icmp6_input() at _icmp6_input+0xb4
>  > wqinput_work() at wqinput_work+0x88
>  > workqueue_worker() at workqueue_worker+0xbc
>  > 
>  > yes, IPv6 is via gif(4), but _before_ the patch for MP-fy
>  >> How-To-Repeat:
>  > 	possibly ping the machine for some time (?) with IPv6 on a gif(4) (?)
>  
>  Which do you use IPv6 over IPv6 or IPv6 over IPv4?
>  
IPv6 over IPv4 -- he.net tunnelbroker

>  
>  Thanks,
>  
>  -- 
>  //////////////////////////////////////////////////////////////////////
>  Internet Initiative Japan Inc.
>  
>  Device Engineering Section,
>  IoT Platform Development Department,
>  Network Division,
>  Technology Unit
>  
>  Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>
>  
Thank you for your reply
	Dominik