From e316ea62e3203d524ff0239a40c56d3a39ad1b5c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 16 Mar 2016 22:52:15 -0700 Subject: tcp/dccp: remove obsolete WARN_ON() in icmp handlers Now SYN_RECV request sockets are installed in ehash table, an ICMP handler can find a request socket while another cpu handles an incoming packet transforming this SYN_RECV request socket into an ESTABLISHED socket. We need to remove the now obsolete WARN_ON(req->sk), since req->sk is set when a new child is created and added into listener accept queue. If this race happens, the ICMP will do nothing special. Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table") Signed-off-by: Eric Dumazet Reported-by: Ben Lazarus Reported-by: Neal Cardwell Signed-off-by: David S. Miller --- net/dccp/ipv4.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'net/dccp') diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index b5672e5fe649..9c67a961ba53 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -204,8 +204,6 @@ void dccp_req_err(struct sock *sk, u64 seq) * ICMPs are not backlogged, hence we cannot get an established * socket here. */ - WARN_ON(req->sk); - if (!between48(seq, dccp_rsk(req)->dreq_iss, dccp_rsk(req)->dreq_gss)) { NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); } else { -- cgit v1.2.3-58-ga151