================================================================== BUG: KCSAN: data-race in find_next_bit / rcu_report_exp_cpu_mult write to 0xffffffff85a7f140 of 8 bytes by task 7 on cpu 0: rcu_report_exp_cpu_mult+0x4f/0xa0 kernel/rcu/tree_exp.h:244 rcu_report_exp_rdp+0x6c/0x90 kernel/rcu/tree_exp.h:254 rcu_preempt_deferred_qs_irqrestore+0x3bb/0x580 kernel/rcu/tree_plugin.h:475 rcu_read_unlock_special+0xec/0x370 kernel/rcu/tree_plugin.h:659 __rcu_read_unlock+0xcf/0xe0 kernel/rcu/tree_plugin.h:394 rcu_read_unlock include/linux/rcupdate.h:645 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline] batadv_nc_worker+0x13a/0x390 net/batman-adv/network-coding.c:718 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 0xffffffff85a7f140 of 8 bytes by task 7251 on cpu 1: _find_next_bit lib/find_bit.c:39 [inline] find_next_bit+0x57/0xe0 lib/find_bit.c:70 sync_rcu_exp_select_node_cpus+0x28e/0x510 kernel/rcu/tree_exp.h:375 sync_rcu_exp_select_cpus+0x30c/0x590 kernel/rcu/tree_exp.h:439 rcu_exp_sel_wait_wake kernel/rcu/tree_exp.h:575 [inline] wait_rcu_exp_gp+0x25/0x40 kernel/rcu/tree_exp.h:589 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: 1 PID: 7251 Comm: kworker/1:4 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp wait_rcu_exp_gp ==================================================================