netdev - Re: [PATCH/RFC] Use of uninitialized data in udp

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Message-ID: <20070305233449.GA24159@gondor.apana.org.au>
Date:	Tue, 6 Mar 2007 10:34:49 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jim Chow <jchow@...are.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH/RFC] Use of uninitialized data in udp_recvmsg().

On Mon, Mar 05, 2007 at 01:01:16PM -0800, Jim Chow wrote:
> On Tue, 6 Mar 2007, Herbert Xu wrote:
> > msg_flags [...] its initial value is not used.
> 
> That's not true.  Please see my post.
> 
> Specifically, at linux-2.6.20.1/net/ipv4/udp.c:843, it seems that 
> udp_recvmsg() can randomly ignore whether the HW has computed a checksum 
> and compute it in SW redundantly.

Sorry, you're right.  This bug has been there for years.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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