================================================================== BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_note_context_switch write to 0xffffffff85a7d490 of 8 bytes by task 32751 on cpu 1: rcu_preempt_ctxt_queue kernel/rcu/tree_plugin.h:223 [inline] rcu_note_context_switch+0x6f6/0x760 kernel/rcu/tree_plugin.h:315 __schedule+0xa4/0x640 kernel/sched/core.c:4007 preempt_schedule_common+0x37/0x90 kernel/sched/core.c:4217 preempt_schedule+0x30/0x40 kernel/sched/core.c:4242 ___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x55/0x60 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:378 [inline] __d_lookup+0x370/0x3f0 fs/dcache.c:2383 lookup_fast+0x26c/0x700 fs/namei.c:1609 walk_component+0x6d/0xe80 fs/namei.c:1796 link_path_walk.part.0+0x5d3/0xa90 fs/namei.c:2131 link_path_walk fs/namei.c:2062 [inline] path_openat+0x14f/0x36e0 fs/namei.c:3524 do_filp_open+0x11e/0x1b0 fs/namei.c:3555 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x55/0x70 fs/open.c:1110 read to 0xffffffff85a7d490 of 8 bytes by task 10 on cpu 0: rcu_gp_fqs_check_wake kernel/rcu/tree.c:1584 [inline] rcu_gp_fqs_check_wake+0x93/0xd0 kernel/rcu/tree.c:1574 rcu_gp_fqs_loop+0x1df/0x580 kernel/rcu/tree.c:1639 rcu_gp_kthread+0x143/0x230 kernel/rcu/tree.c:1799 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: 0 PID: 10 Comm: rcu_preempt Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================