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BUG: KCSAN: data-race in pollwake / pollwake

write to 0xffffc9000071bc30 of 4 bytes by task 3400 on cpu 0:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common+0xb3/0x130 kernel/sched/wait.c:107
 __wake_up_common_lock kernel/sched/wait.c:138 [inline]
 __wake_up_sync_key+0x82/0xc0 kernel/sched/wait.c:213
 sock_def_readable+0x70/0x1b0 net/core/sock.c:3324
 __netlink_sendskb net/netlink/af_netlink.c:1289 [inline]
 netlink_broadcast_deliver net/netlink/af_netlink.c:1419 [inline]
 do_one_broadcast net/netlink/af_netlink.c:1506 [inline]
 netlink_broadcast_filtered+0x971/0xbc0 net/netlink/af_netlink.c:1552
 netlink_broadcast net/netlink/af_netlink.c:1576 [inline]
 netlink_sendmsg+0x603/0x770 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2558
 ___sys_sendmsg net/socket.c:2612 [inline]
 __sys_sendmsg+0x1e9/0x270 net/socket.c:2641
 __do_sys_sendmsg net/socket.c:2650 [inline]
 __se_sys_sendmsg net/socket.c:2648 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2648
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffffc9000071bc30 of 4 bytes by task 2815 on cpu 1:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common+0xb3/0x130 kernel/sched/wait.c:107
 __wake_up_common_lock kernel/sched/wait.c:138 [inline]
 __wake_up_sync_key+0x82/0xc0 kernel/sched/wait.c:213
 sock_def_readable+0x70/0x1b0 net/core/sock.c:3324
 unix_dgram_sendmsg+0xd8b/0x1150 net/unix/af_unix.c:2093
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x1aa/0x230 net/socket.c:1158
 do_iter_write+0x4b4/0x7b0 fs/read_write.c:860
 vfs_writev+0x1a8/0x320 fs/read_write.c:933
 do_writev+0xf8/0x220 fs/read_write.c:976
 __do_sys_writev fs/read_write.c:1049 [inline]
 __se_sys_writev fs/read_write.c:1046 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1046
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2815 Comm: dhcpcd Tainted: G        W          6.6.0-rc6-syzkaller-00029-g213f891525c2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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