================================================================== BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_preempt_deferred_qs_irqrestore write to 0xffffffff85c7d0d0 of 8 bytes by task 3989 on cpu 0: rcu_preempt_deferred_qs_irqrestore+0x43d/0x580 kernel/rcu/tree_plugin.h:496 rcu_read_unlock_special kernel/rcu/tree_plugin.h:644 [inline] __rcu_read_unlock+0x16a/0x3d0 kernel/rcu/tree_plugin.h:383 rcu_read_unlock include/linux/rcupdate.h:670 [inline] sock_def_readable+0xd0/0x140 net/core/sock.c:2799 __netlink_sendskb+0x65/0x80 net/netlink/af_netlink.c:1249 netlink_sendskb net/netlink/af_netlink.c:1255 [inline] netlink_unicast+0x486/0x4d0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x4d3/0x8b0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:659 ____sys_sendmsg+0x49d/0x4d0 net/socket.c:2330 ___sys_sendmsg+0xb5/0x100 net/socket.c:2384 __sys_sendmsg+0xa0/0x160 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x51/0x70 net/socket.c:2424 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+0x1df/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 ==================================================================