From: David Miller <davem@davemloft.net>
To: herbert@gondor.apana.org.au
Cc: kaber@trash.net, nhorman@tuxdriver.com, zbr@ioremap.net,
netdev@vger.kernel.org, kuznet@ms2.inr.ac.ru, pekkas@netcore.fi,
jmorris@namei.org, yoshfuji@linux-ipv6.org
Subject: Re: [Patch 4/5] Network Drop Monitor: Adding drop monitor implementation & Netlink protocol
Date: Sun, 05 Apr 2009 02:56:21 -0700 (PDT) [thread overview]
Message-ID: <20090405.025621.262216979.davem@davemloft.net> (raw)
In-Reply-To: <20090402144549.GA764@gondor.apana.org.au>
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 2 Apr 2009 22:45:49 +0800
> On Thu, Apr 02, 2009 at 04:42:18PM +0200, Patrick McHardy wrote:
> >
> > Actually we should be fine since the current netlink helpers only do
> > bytewise copying anyways. And I think we've pretty much gotten rid of
> > all the raw attribute accesses.
>
> What about stuff like xfrm_userpolicy_info? I suppose if *everything*
> is copied then it wouldn't matter.
You were saying?
[ 6400.609361] Kernel unaligned access at TPC[10258734] copy_to_user_state+0x54/0x9c [xfrm_user]
[ 6400.609498] Kernel unaligned access at TPC[10258734] copy_to_user_state+0x54/0x9c [xfrm_user]
[ 6400.667575] Kernel unaligned access at TPC[10258734] copy_to_user_state+0x54/0x9c [xfrm_user]
[ 6400.667707] Kernel unaligned access at TPC[10258734] copy_to_user_state+0x54/0x9c [xfrm_user]
This problem has existed for a long time. In this specific case even
if you use memcpy() (in fact memcpy() is being used here) GCC sees the
types and says it can do aligned 64-bit loads and stores to do the
memcpy() inline.
next prev parent reply other threads:[~2009-04-05 9:56 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-03 17:04 [Patch 4/5] Network Drop Monitor: Adding drop monitor implementation & Netlink protocol Neil Horman
2009-03-03 18:19 ` Evgeniy Polyakov
2009-03-03 19:21 ` Neil Horman
2009-03-03 22:14 ` David Miller
2009-03-03 22:16 ` David Miller
2009-03-04 10:06 ` Patrick McHardy
2009-03-04 11:00 ` David Miller
2009-04-02 9:39 ` Herbert Xu
2009-04-02 9:50 ` David Miller
2009-04-02 9:52 ` David Miller
2009-04-02 9:59 ` Herbert Xu
2009-04-02 14:42 ` Patrick McHardy
2009-04-02 14:45 ` Herbert Xu
2009-04-02 14:57 ` Patrick McHardy
2009-04-02 14:59 ` Herbert Xu
2009-04-02 15:06 ` Patrick McHardy
2009-04-02 15:09 ` Herbert Xu
2009-04-02 15:14 ` Patrick McHardy
2009-04-02 15:30 ` Herbert Xu
2009-04-05 9:59 ` David Miller
2009-04-06 13:21 ` Patrick McHardy
2009-06-10 8:08 ` David Miller
2009-06-10 10:35 ` Patrick McHardy
2009-04-05 9:57 ` David Miller
2009-04-05 9:56 ` David Miller [this message]
2009-04-05 9:54 ` David Miller
2009-03-04 11:44 ` Neil Horman
2009-03-05 19:27 ` Neil Horman
2009-03-11 16:17 ` David Miller
2009-03-11 19:51 ` Neil Horman
2009-03-13 19:10 ` David Miller
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