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Message-ID: <20141106064318.GW7996@ZenIV.linux.org.uk> Date: Thu, 6 Nov 2014 06:43:18 +0000 From: Al Viro <viro@...IV.linux.org.uk> To: Herbert Xu <herbert@...dor.apana.org.au> Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bcrl@...ck.org, Masahide Nakamura <nakam@...ux-ipv6.org>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org> Subject: Re: ipv4: Use standard iovec primitive in raw_probe_proto_opt On Thu, Nov 06, 2014 at 01:50:23PM +0800, Herbert Xu wrote: > + /* We only need the first two bytes. */ > + err = memcpy_fromiovecend((void *)&icmph, msg->msg_iov, 0, 2); > + if (err) > + return err; > + > + fl4->fl4_icmp_type = icmph.type; > + fl4->fl4_icmp_code = icmph.code; That's more readable, but that exposes another problem in there - we read the same piece of userland data twice, with no promise whatsoever that we'll get the same value both times... -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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