genetlink: fix genlmsg_multicast() bug
Unfortunately, I introduced a tremendously stupid bug into genlmsg_multicast() when doing all those multicast group changes: it adjusts the group number, but then passes it to genlmsg_multicast_netns() which does that again. Somehow, my tests failed to catch this, so add a warning into genlmsg_multicast_netns() and remove the offending group ID adjustment. Also add a warning to the similar code in other functions so people who misuse them are more loudly warned. Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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