On Thu, Nov 06, 2014 at 06:43:18AM +0000, Al Viro wrote: > 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...
Sure, but you have to be root anyway to write to raw sockets. Patches are welcome :) Cheers, -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
