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BUG: KCSAN: data-race in rcu_gp_fqs_loop / rcu_preempt_deferred_qs_irqrestore

write to 0xffffffff85c7d190 of 8 bytes by task 7969 on cpu 0:
 rcu_preempt_deferred_qs_irqrestore+0x43d/0x580 kernel/rcu/tree_plugin.h:496
 rcu_read_unlock_special kernel/rcu/tree_plugin.h:644 [inline]
 __rcu_read_unlock+0x16a/0x3d0 kernel/rcu/tree_plugin.h:383
 rcu_read_unlock include/linux/rcupdate.h:670 [inline]
 sock_def_readable+0xd0/0x140 net/core/sock.c:2799
 __netlink_sendskb+0x65/0x80 net/netlink/af_netlink.c:1249
 netlink_broadcast_deliver net/netlink/af_netlink.c:1381 [inline]
 do_one_broadcast net/netlink/af_netlink.c:1466 [inline]
 netlink_broadcast_filtered+0x78a/0x960 net/netlink/af_netlink.c:1510
 netlink_broadcast+0x43/0x60 net/netlink/af_netlink.c:1534
 uevent_net_broadcast_untagged lib/kobject_uevent.c:330 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:408 [inline]
 kobject_uevent_env+0x710/0xc80 lib/kobject_uevent.c:592
 kobject_uevent+0x29/0x40 lib/kobject_uevent.c:641
 driver_bound+0x13c/0x150 drivers/base/dd.c:394
 really_probe+0x2ae/0x4b0 drivers/base/dd.c:588
 driver_probe_device+0xbe/0x170 drivers/base/dd.c:721
 __device_attach_driver+0x13a/0x160 drivers/base/dd.c:828
 bus_for_each_drv+0xeb/0x140 drivers/base/bus.c:430
 __device_attach+0x18f/0x260 drivers/base/dd.c:894
 device_initial_probe+0x24/0x30 drivers/base/dd.c:941
 bus_probe_device+0x14c/0x170 drivers/base/bus.c:490
 device_add+0xd9f/0x1040 drivers/base/core.c:2487
 device_register+0x27/0x40 drivers/base/core.c:2560
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:288 [inline]
 new_device_store+0x1b4/0x330 drivers/net/netdevsim/bus.c:182
 bus_attr_store+0x5e/0x80 drivers/base/bus.c:121
 sysfs_kf_write+0xb2/0xe0 fs/sysfs/file.c:138
 kernfs_fop_write+0x1bd/0x300 fs/kernfs/file.c:315
 __vfs_write+0x67/0xc0 fs/read_write.c:494
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x18a/0x390 fs/read_write.c:542
 ksys_write+0xd5/0x1b0 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x4c/0x60 fs/read_write.c:620
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff85c7d190 of 8 bytes by task 10 on cpu 1:
 rcu_gp_fqs_loop+0x23c/0x580 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x143/0x230 kernel/rcu/tree.c:1821
 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: 10 Comm: rcu_preempt Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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