================================================================== BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_note_context_switch write to 0xffffffff85a7d490 of 8 bytes by task 7210 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+0xa4/0x640 kernel/sched/core.c:4007 preempt_schedule_irq+0x57/0x90 kernel/sched/core.c:4319 restore_regs_and_return_to_kernel+0x0/0x25 __sanitizer_cov_trace_const_cmp1+0x1/0x20 kernel/kcov.c:174 nf_conntrack_handle_packet net/netfilter/nf_conntrack_core.c:1632 [inline] nf_conntrack_in+0x410/0xa80 net/netfilter/nf_conntrack_core.c:1726 ipv4_conntrack_local+0xbe/0x130 net/netfilter/nf_conntrack_proto.c:200 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0x83/0x160 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:260 [inline] __ip_local_out+0x1f7/0x2b0 net/ipv4/ip_output.c:114 ip_local_out+0x31/0x90 net/ipv4/ip_output.c:123 __ip_queue_xmit+0x3a8/0xa40 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x60 include/net/ip.h:237 __tcp_transmit_skb+0xe81/0x1d60 net/ipv4/tcp_output.c:1169 __tcp_send_ack+0x246/0x300 net/ipv4/tcp_output.c:3696 read to 0xffffffff85a7d490 of 8 bytes by task 10 on cpu 1: 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+0x36c/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: 1 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 ==================================================================