From: Eric Dumazet <eric.duma...@gmail.com>
Date: Tue, 17 Oct 2017 12:45:26 -0700

> syzkaller found another bug in DCCP/TCP stacks [1]
> 
> For the reasons explained in commit ce1050089c96 ("tcp/dccp: fix
> ireq->pktopts race"), we need to make sure we do not access
> ireq->opt unless we own the request sock.

This doesn't apply to 'net'.

[davem@kkuri net]$ git am --signoff v2-net-dccp-tcp-fix-ireq--opt-races.patch 
Applying: dccp/tcp: fix ireq->opt races
error: patch failed: include/net/inet_sock.h:96
error: include/net/inet_sock.h: patch does not apply
error: patch failed: net/dccp/ipv4.c:414
error: net/dccp/ipv4.c: patch does not apply
error: patch failed: net/ipv4/inet_connection_sock.c:540
error: net/ipv4/inet_connection_sock.c: patch does not apply
error: patch failed: net/ipv4/syncookies.c:355
error: net/ipv4/syncookies.c: patch does not apply
error: patch failed: net/ipv4/tcp_input.c:6196
error: net/ipv4/tcp_input.c: patch does not apply
error: patch failed: net/ipv4/tcp_ipv4.c:877
error: net/ipv4/tcp_ipv4.c: patch does not apply

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