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authorEric Dumazet <edumazet@google.com>2016-03-17 08:52:15 +0300
committerDavid S. Miller <davem@davemloft.net>2016-03-18 04:06:40 +0300
commite316ea62e3203d524ff0239a40c56d3a39ad1b5c (patch)
tree008b9f5e2820e85f881910bff5e21921eaa260db /net/dccp
parentf6773c5e95a6dc1af82157d4e96e412dee3abf31 (diff)
downloadlinux-e316ea62e3203d524ff0239a40c56d3a39ad1b5c.tar.xz
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 <edumazet@google.com> Reported-by: Ben Lazarus <blazarus@google.com> Reported-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ipv4.c2
1 files changed, 0 insertions, 2 deletions
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 {