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BUG: KCSAN: data-race in xprt_connect / xprt_unlock_connect

write to 0xffff8880ab5cfcc0 of 8 bytes by task 31398 on cpu 0:
 xprt_unlock_connect+0xa5/0xe0 net/sunrpc/xprt.c:808
 xs_tcp_setup_socket+0x1d7/0x710 net/sunrpc/xprtsock.c:2422
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264
 worker_thread+0xa0/0x800 kernel/workqueue.c:2410
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffff8880ab5cfcc0 of 8 bytes by task 14577 on cpu 1:
 xprt_release_write net/sunrpc/xprt.c:386 [inline]
 xprt_connect+0x318/0x3a0 net/sunrpc/xprt.c:857
 call_connect+0x118/0x1a0 net/sunrpc/clnt.c:2086
 __rpc_execute+0xf5/0x640 net/sunrpc/sched.c:904
 rpc_async_schedule+0x66/0xa0 net/sunrpc/sched.c:989
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264
 worker_thread+0xa0/0x800 kernel/workqueue.c:2410
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14577 Comm: kworker/u4:0 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: rpciod rpc_async_schedule
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