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Date:      Fri, 31 Aug 2018 00:12:40 +0200
From:      "Kristof Provost" <kp@FreeBSD.org>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc:        "Jonathan T. Looney" <jtl@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r337776 - head/sys/netinet6
Message-ID:  <11A2CD98-032D-4181-9CC9-D8A14ACAFCDE@FreeBSD.org>
In-Reply-To: <0793AABF-F027-407B-8ACD-1CA4B67260EE@lists.zabbadoz.net>
References:  <201808141717.w7EHHcPf010971@repo.freebsd.org> <7C9F31C2-839C-4537-A43D-F51A54380BDA@FreeBSD.org> <0793AABF-F027-407B-8ACD-1CA4B67260EE@lists.zabbadoz.net>

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On 31 Aug 2018, at 0:07, Bjoern A. Zeeb wrote:
> On 30 Aug 2018, at 22:00, Kristof Provost wrote:
>> I’ve done this, which fixes the problem:
>>
>> 	diff --git a/sys/netinet6/frag6.c b/sys/netinet6/frag6.c
>> 	index 0f30801540a..e1f2b3f5842 100644
>> 	--- a/sys/netinet6/frag6.c
>> 	+++ b/sys/netinet6/frag6.c
>> 	@@ -218,7 +218,9 @@ frag6_input(struct mbuf **mp, int *offp, int 
>> proto)
>> 	        int offset = *offp, nxt, i, next;
>> 	        int first_frag = 0;
>> 	        int fragoff, frgpartlen;        /* must be larger than 
>> u_int16_t */
>> 	-       uint32_t hash, hashkey[sizeof(struct in6_addr) * 2 + 1], 
>> *hashkeyp;
>> 	+       uint32_t hashkey[(sizeof(struct in6_addr) * 2 + 
>> sizeof(u_int32_t)) /
>
> Can we actually make it the size of the field rather than uint32_t 
> (not u_int32_t)?  I guess not easily but at least change the type 
> spelling and leave a comment what it is?
>
I think we can spell that `sizeof(ip6f->ip6f_ident))`, yes.

Kristof
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From: Rick Macklem <rmacklem@uoguelph.ca>
To: Kristof Provost <kp@FreeBSD.org>, "Bjoern A. Zeeb"
 <bzeeb-lists@lists.zabbadoz.net>
CC: "Jonathan T. Looney" <jtl@FreeBSD.org>, "src-committers@freebsd.org"
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Subject: Re: svn commit: r337776 - head/sys/netinet6
Thread-Topic: svn commit: r337776 - head/sys/netinet6
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Date: Thu, 30 Aug 2018 22:51:52 +0000
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References: <201808141717.w7EHHcPf010971@repo.freebsd.org>
 <7C9F31C2-839C-4537-A43D-F51A54380BDA@FreeBSD.org>
 <0793AABF-F027-407B-8ACD-1CA4B67260EE@lists.zabbadoz.net>,
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Sorry for the top post, but I'm on a web based email.
pi@freebsd.org reported a problem w.r.t. IPv6 fragmentation when
using NFS. (He switched from UDP --> TCP and the problem went
away.)
It's over here on freebsd-stable:
http://docs.FreeBSD.org/cgi/mid.cgi?20180827155651.GW2118

I don't know if this is related, given that it is a recent commit.
(There have been a bunch of other IPv6 fragmentation commits.)

rick

________________________________________
From: owner-src-committers@freebsd.org <owner-src-committers@freebsd.org> o=
n behalf of Kristof Provost <kp@FreeBSD.org>
Sent: Thursday, August 30, 2018 6:12:40 PM
To: Bjoern A. Zeeb
Cc: Jonathan T. Looney; src-committers@freebsd.org; svn-src-all@freebsd.org=
; svn-src-head@freebsd.org
Subject: Re: svn commit: r337776 - head/sys/netinet6

On 31 Aug 2018, at 0:07, Bjoern A. Zeeb wrote:

On 30 Aug 2018, at 22:00, Kristof Provost wrote:

I=92ve done this, which fixes the problem:

diff --git a/sys/netinet6/frag6.c b/sys/netinet6/frag6.c
index 0f30801540a..e1f2b3f5842 100644
--- a/sys/netinet6/frag6.c
+++ b/sys/netinet6/frag6.c
@@ -218,7 +218,9 @@ frag6_input(struct mbuf **mp, int *offp, int proto)
int offset =3D *offp, nxt, i, next;
int first_frag =3D 0;
int fragoff, frgpartlen; /* must be larger than u_int16_t */
- uint32_t hash, hashkey[sizeof(struct in6_addr) * 2 + 1], *hashkeyp;
+ uint32_t hashkey[(sizeof(struct in6_addr) * 2 + sizeof(u_int32_t)) /

Can we actually make it the size of the field rather than uint32_t (not u_i=
nt32_t)? I guess not easily but at least change the type spelling and leave=
 a comment what it is?

I think we can spell that sizeof(ip6f->ip6f_ident)), yes.

Kristof



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