tree 088e66c4818f424c2b5e2c30c2262f5458afab92
parent 085cbbda4b4cc7dd2ba63806346881c2c2e10107
author Tom Herbert <tom@quantonium.net> 1516826140 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1519553140 +0100

kcm: Only allow TCP sockets to be attached to a KCM mux

commit 581e7226a5d43f629eb6399a121f85f6a15f81be upstream.

TCP sockets for IPv4 and IPv6 that are not listeners or in closed
stated are allowed to be attached to a KCM mux.

Fixes: ab7ac4eb9832 ("kcm: Kernel Connection Multiplexor module")
Reported-by: syzbot+8865eaff7f9acd593945@syzkaller.appspotmail.com
Signed-off-by: Tom Herbert <tom@quantonium.net>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>