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

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Message-ID: <Pine.LNX.4.64.0703051257520.27979@jchow-amax.eng.vmware.com>
Date:	Mon, 5 Mar 2007 13:01:16 -0800 (PST)
From:	Jim Chow <jchow@...are.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
cc:	netdev@...r.kernel.org
Subject: Re: [PATCH/RFC] Use of uninitialized data in udp_recvmsg().

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.

Jim
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