==================================================================
BUG: KCSAN: data-race in xprt_connect / xprt_unlock_connect

write to 0xffff8880a7cef4c0 of 8 bytes by task 1519 on cpu 1:
 xprt_unlock_connect+0xa5/0xe0 net/sunrpc/xprt.c:804
 xs_udp_setup_socket+0xf7/0x3d0 net/sunrpc/xprtsock.c:2186
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269
 worker_thread+0xa0/0x800 kernel/workqueue.c:2415
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffff8880a7cef4c0 of 8 bytes by task 26383 on cpu 0:
 xprt_release_write net/sunrpc/xprt.c:382 [inline]
 xprt_connect+0x318/0x3a0 net/sunrpc/xprt.c:853
 call_connect+0x118/0x1a0 net/sunrpc/clnt.c:2093
 __rpc_execute+0xf5/0x640 net/sunrpc/sched.c:903
 rpc_execute+0x1b5/0x1c0 net/sunrpc/sched.c:981
 rpc_run_task+0x379/0x440 net/sunrpc/clnt.c:1133
 rpc_call_sync+0xa7/0x130 net/sunrpc/clnt.c:1162
 rpc_ping net/sunrpc/clnt.c:2726 [inline]
 rpc_create_xprt+0x376/0x3d0 net/sunrpc/clnt.c:482
 rpc_create+0x296/0x4a0 net/sunrpc/clnt.c:595
 nfs_create_rpc_client+0x348/0x3c0 fs/nfs/client.c:522
 nfs_init_client fs/nfs/client.c:637 [inline]
 nfs_init_client+0x69/0xc0 fs/nfs/client.c:624
 nfs_get_client+0x83d/0x8d0 fs/nfs/client.c:422
 nfs_init_server+0x1c0/0x790 fs/nfs/client.c:675
 nfs_create_server+0xcc/0x3d0 fs/nfs/client.c:962

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 26383 Comm: syz-executor.1 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================