Re: kern/51325: "netstat -ia" causes infinite loop

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

The following reply was made to PR kern/51325; it has been noted by GNATS.

From: Ryota Ozaki <ozaki-r%netbsd.org@localhost>
To: Christos Zoulas <christos%zoulas.com@localhost>
Cc: matthew green <mrg%eterna.com.au@localhost>, "gnats-bugs%NetBSD.org@localhost" <gnats-bugs%netbsd.org@localhost>, kern-bug-people%netbsd.org@localhost, 
	"gnats-admin%netbsd.org@localhost" <gnats-admin%netbsd.org@localhost>, "netbsd-bugs%netbsd.org@localhost" <netbsd-bugs%netbsd.org@localhost>
Subject: Re: kern/51325: "netstat -ia" causes infinite loop
Date: Thu, 14 Jul 2016 16:30:08 +0900

 On Thu, Jul 14, 2016 at 3:00 PM, Christos Zoulas <christos%zoulas.com@localhost> wrote:
 > On Jul 14, 11:06am, ozaki-r%netbsd.org@localhost (Ryota Ozaki) wrote:
 > -- Subject: Re: kern/51325: "netstat -ia" causes infinite loop
 >
 > | On Wed, Jul 13, 2016 at 6:00 PM, matthew green <mrg%eterna.com.au@localhost> wrote:
 > | > the right way to fix this would be to convert that part
 > | > of netstat to use sysctl on live kernels.
 > |
 > | christos@ has done it? :)
 >
 > It is close. I will try to finish it in the next few days. I need to handle
 > the multicast stuff.
 
 Thanks!
 
 >
 > | >  then you can
 > | > change the in-kernel version more sanely without breaking
 > | > apps.  sure, a deaad kernel netstat user will have to
 > | > match kernel/user versions but that's always the case.
 > |
 > | If it's allowed, I want to do so because in this case we
 > | need to do some tricky workaround to make ifaddr lists
 > | workable for psz/psref maybe introducing some overhead.
 > |
 >
 > Yes, it should be allowed. The policy should be that runtime support
 > via sysctl retains compatiibility across kernel bumps, but kmem grovelling
 > needs a matching kernel and userland binary so that we don't need to jump
 > through hoops to change kernel data structures.
 
 Good to hear! That really helps me :)
 
   ozaki-r