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Message-ID: <loom.20150524T065137-105@post.gmane.org> Date: Sun, 24 May 2015 04:55:40 +0000 (UTC) From: Oliver Graff <oliver.e.graff@...il.com> To: netdev@...r.kernel.org Subject: Re: Socket receives packet to multicast group to which it was not joined since kernel 3.13.10-1 Shawn Bohrer <shawn.bohrer <at> gmail.com> writes: > > On Tue, May 13, 2014 at 04:36:41PM -0500, Shawn Bohrer wrote: > > If I did "break" something here it appears to be because with > > ip_early_demux we only call ip_check_mc_rcu() once on the initial > > packet, and subsequent packets destined for that socket simply need to > > pass the __udp_is_mcast_sock() test. With ip_early_demux disaled we > > call ip_check_mc_rcu() for every packet. > > So is the solution to effectively call ip_check_mc_rcu() inside > udp_v4_early_demux()? > > -- > Shawn > (See earlier parts of thread here: http://netdev.vger.kernel.narkive.com/mwurLsMT/socket-receives-packet-to-multicast- group-to-which-it-was-not-joined-since-kernel-3-13-10-1) Was a bug report filed for this / was this fixed? I looked at the diffs from the referenced commit and the current version of udp_v4_early_demux and the changes appear to be minimal, it doesn't look like ip_check_mc_rcu was added. Is that all that's needed? - Oliver -- 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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