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Re: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of jumps

Started byFlorian Westphal <fw@strlen.de>
First post2016-08-14 13:20 +0200
Last post2016-08-14 20:10 +0200
Articles 4 — 2 participants

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  Re: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of  jumps Florian Westphal <fw@strlen.de> - 2016-08-14 13:20 +0200
    Re: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of  jumps Florian Westphal <fw@strlen.de> - 2016-08-14 15:20 +0200
      Re: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of  jumps Ben Hutchings <ben@decadent.org.uk> - 2016-08-17 02:30 +0200
    Re: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of  jumps Ben Hutchings <ben@decadent.org.uk> - 2016-08-14 20:10 +0200

#1461889 — Re: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of jumps

FromFlorian Westphal <fw@strlen.de>
Date2016-08-14 13:20 +0200
SubjectRe: [PATCH 3.16 289/305] netfilter: x_tables: validate targets of jumps
Message-ID<s61Cq-7hw-23@gated-at.bofh.it>
Ben Hutchings <ben@decadent.org.uk> wrote:
> 3.16.37-rc1 review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Florian Westphal <fw@strlen.de>
> 
> commit 36472341017529e2b12573093cc0f68719300997 upstream.

[..]

> The extra overhead is negible, even with absurd cases.

Not true, the overhead is huge and increases restore time for
large rulesets from mere seconds to minutes, see

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f4dc77713f8016d2e8a3295e1c9c53a21f296def

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#1462123

FromFlorian Westphal <fw@strlen.de>
Date2016-08-14 15:20 +0200
Message-ID<s63uy-83-9@gated-at.bofh.it>
In reply to#1461889
Ben Hutchings <ben@decadent.org.uk> wrote:
> On Sat, 2016-08-13 at 20:30 +0200, Florian Westphal wrote:
> > > Ben Hutchings <ben@decadent.org.uk> wrote:
> > > 
> > > 3.16.37-rc1 review patch.  If anyone has any objections, please let me know.
> > > 
> > > ------------------
> > > 
> > > > > From: Florian Westphal <fw@strlen.de>
> > > 
> > > commit 36472341017529e2b12573093cc0f68719300997 upstream.
> > 
> > [..]
> > 
> > > 
> > > The extra overhead is negible, even with absurd cases.
> > 
> > Not true, the overhead is huge and increases restore time for
> > large rulesets from mere seconds to minutes, see
> > 
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f4dc77713f8016d2e8a3295e1c9c53a21f296def
> 
> So do you think I should add that to this update or defer the netfilter
> changes to the next update?

Depends on what your focus is for 3.16.

If your focus is to better not break anything I would just drop
this patch and apply it for the next round with the fix
(f4dc77713f8016d2e8a3295e1c9c53a21f296def) on top once it had more
soak time.

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#1464252

FromBen Hutchings <ben@decadent.org.uk>
Date2016-08-17 02:30 +0200
Message-ID<s6WU2-1Ld-17@gated-at.bofh.it>
In reply to#1462123

[Multipart message — attachments visible in raw view] — view raw

On Sat, 2016-08-13 at 22:35 +0200, Florian Westphal wrote:
> > Ben Hutchings <ben@decadent.org.uk> wrote:
> > 
> > On Sat, 2016-08-13 at 20:30 +0200, Florian Westphal wrote:
> > > 
> > > > 
> > > > > > > > Ben Hutchings <ben@decadent.org.uk> wrote:
> > > > 
> > > > 3.16.37-rc1 review patch.  If anyone has any objections, please let me know.
> > > > 
> > > > ------------------
> > > > 
> > > > > 
> > > > > > 
> > > > > > > > > > > > From: Florian Westphal <fw@strlen.de>
> > > > 
> > > > commit 36472341017529e2b12573093cc0f68719300997 upstream.
> > > 
> > > [..]
> > > 
> > > > 
> > > > 
> > > > The extra overhead is negible, even with absurd cases.
> > > 
> > > Not true, the overhead is huge and increases restore time for
> > > large rulesets from mere seconds to minutes, see
> > > 
> > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f4dc77713f8016d2e8a3295e1c9c53a21f296def
> > 
> > So do you think I should add that to this update or defer the netfilter
> > changes to the next update?
> 
> Depends on what your focus is for 3.16.
> 
> If your focus is to better not break anything I would just drop
> this patch and apply it for the next round with the fix
> (f4dc77713f8016d2e8a3295e1c9c53a21f296def) on top once it had more
> soak time.

I thought there were more that depended on this one, but in fact
dropping just this seems to work.  So that's what I've done for now.
Thanks.

Ben.

-- 
Ben Hutchings
If at first you don't succeed, you're doing about average.

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#1462255

FromBen Hutchings <ben@decadent.org.uk>
Date2016-08-14 20:10 +0200
Message-ID<s63uy-83-11@gated-at.bofh.it>
In reply to#1461889

[Multipart message — attachments visible in raw view] — view raw

On Sat, 2016-08-13 at 20:30 +0200, Florian Westphal wrote:
> > Ben Hutchings <ben@decadent.org.uk> wrote:
> > 
> > 3.16.37-rc1 review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > > > From: Florian Westphal <fw@strlen.de>
> > 
> > commit 36472341017529e2b12573093cc0f68719300997 upstream.
> 
> [..]
> 
> > 
> > The extra overhead is negible, even with absurd cases.
> 
> Not true, the overhead is huge and increases restore time for
> large rulesets from mere seconds to minutes, see
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f4dc77713f8016d2e8a3295e1c9c53a21f296def

So do you think I should add that to this update or defer the netfilter
changes to the next update?

Ben.

-- 
Ben Hutchings
Everything should be made as simple as possible, but not simpler.
                                                           - Albert
Einstein

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