================================================================== BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_note_context_switch write to 0xffffffff85c7d0d0 of 8 bytes by task 7914 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_common+0x37/0x90 kernel/sched/core.c:4236 preempt_schedule+0x30/0x40 kernel/sched/core.c:4261 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0x7e/0x80 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] __wake_up_common_lock+0x85/0xb0 kernel/sched/wait.c:125 __wake_up_sync_key+0x1b/0x20 kernel/sched/wait.c:190 sock_def_readable+0xa4/0x140 net/core/sock.c:2796 unix_dgram_sendmsg+0x9be/0xdc0 net/unix/af_unix.c:1762 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:659 __sys_sendto+0x21f/0x320 net/socket.c:1985 __do_sys_sendto net/socket.c:1997 [inline] __se_sys_sendto net/socket.c:1993 [inline] __x64_sys_sendto+0x89/0xb0 net/socket.c:1993 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+0x36c/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 ==================================================================