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| author | Eric Dumazet <edumazet@google.com> | 2016-03-16 22:52:15 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-20 15:42:04 +0900 |
| commit | bd33d14acf43bdb040f203555b13765cd2b23d9e (patch) | |
| tree | c932a2e6c038adbc25e8899397356163b71bcc9a /net/dccp | |
| parent | 029464a380858e54ab750a5a536a0bdcd7180b1f (diff) | |
| download | linux-stable-bd33d14acf43bdb040f203555b13765cd2b23d9e.tar.gz linux-stable-bd33d14acf43bdb040f203555b13765cd2b23d9e.tar.bz2 linux-stable-bd33d14acf43bdb040f203555b13765cd2b23d9e.zip | |
tcp/dccp: remove obsolete WARN_ON() in icmp handlers
[ Upstream commit e316ea62e3203d524ff0239a40c56d3a39ad1b5c ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/ipv4.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 902d606324a0..8be8f27bfacc 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 { |