==================================================================
BUG: KCSAN: data-race in process_srcu / synchronize_srcu

write to 0xffffffff8604e8a0 of 8 bytes by task 17 on cpu 1:
 srcu_gp_end kernel/rcu/srcutree.c:533 [inline]
 srcu_advance_state kernel/rcu/srcutree.c:1146 [inline]
 process_srcu+0x207/0x780 kernel/rcu/srcutree.c:1237
 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 0xffffffff8604e8a0 of 8 bytes by task 12515 on cpu 0:
 srcu_might_be_idle kernel/rcu/srcutree.c:784 [inline]
 synchronize_srcu+0x107/0x214 kernel/rcu/srcutree.c:996
 fsnotify_connector_destroy_workfn+0x63/0xb0 fs/notify/mark.c:164
 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

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12515 Comm: kworker/u4:8 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound fsnotify_connector_destroy_workfn
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 12515 Comm: kworker/u4:8 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf5/0x159 lib/dump_stack.c:113
 panic+0x210/0x640 kernel/panic.c:221
 kcsan_report.cold+0xc/0x10 kernel/kcsan/report.c:302
 __kcsan_setup_watchpoint+0x32e/0x4a0 kernel/kcsan/core.c:411
 __tsan_read8 kernel/kcsan/kcsan.c:36 [inline]
 __tsan_read8+0x2c/0x30 kernel/kcsan/kcsan.c:36
 srcu_might_be_idle kernel/rcu/srcutree.c:784 [inline]
 synchronize_srcu+0x107/0x214 kernel/rcu/srcutree.c:996
 fsnotify_connector_destroy_workfn+0x63/0xb0 fs/notify/mark.c:164
 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
Kernel Offset: disabled
Rebooting in 86400 seconds..