==================================================================
BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_note_context_switch

write to 0xffffffff85c7d0d0 of 8 bytes by task 17503 on cpu 0:
 rcu_preempt_ctxt_queue kernel/rcu/tree_plugin.h:223 [inline]
 rcu_note_context_switch+0x6f6/0x760 kernel/rcu/tree_plugin.h:315
 __schedule+0xa4/0x690 kernel/sched/core.c:4019
 preempt_schedule_irq+0x57/0x90 kernel/sched/core.c:4338
 restore_regs_and_return_to_kernel+0x0/0x25
 check_kcov_mode kernel/kcov.c:153 [inline]
 write_comp_data+0x17/0x70 kernel/kcov.c:208
 __read_once_size+0x25/0xe0 include/linux/compiler.h:232
 __ref_is_percpu include/linux/percpu-refcount.h:161 [inline]
 percpu_ref_get_many include/linux/percpu-refcount.h:191 [inline]
 percpu_ref_get include/linux/percpu-refcount.h:209 [inline]
 cgroup_bpf_get include/linux/cgroup.h:939 [inline]
 cgroup_sk_alloc+0x126/0x460 kernel/cgroup/cgroup.c:6270
 sk_alloc+0x263/0x5b0 net/core/sock.c:1677
 __netlink_create+0x59/0x140 net/netlink/af_netlink.c:629
 netlink_create+0x29c/0x400 net/netlink/af_netlink.c:692
 __sock_create+0x241/0x3a0 net/socket.c:1420
 sock_create net/socket.c:1471 [inline]
 __sys_socket+0x96/0x170 net/socket.c:1513
 __do_sys_socket net/socket.c:1522 [inline]
 __se_sys_socket net/socket.c:1520 [inline]
 __x64_sys_socket+0x4c/0x60 net/socket.c:1520
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff85c7d0d0 of 8 bytes by task 10 on cpu 1:
 rcu_gp_fqs_check_wake kernel/rcu/tree.c:1606 [inline]
 rcu_gp_fqs_check_wake+0x93/0xd0 kernel/rcu/tree.c:1596
 rcu_gp_fqs_loop+0x1df/0x580 kernel/rcu/tree.c:1661
 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
==================================================================