From: zhudi
Date: Wed, 26 Aug 2020 20:01:13 +0800
> The data races were reported by KCSAN:
> BUG: KCSAN: data-race in netlink_recvmsg / skb_queue_tail
...
> Since the write is under sk_receive_queue->lock but the read
> is done as lockless. so fix it by using skb_queue_empty_lockless()
> instead
The data races were reported by KCSAN:
BUG: KCSAN: data-race in netlink_recvmsg / skb_queue_tail
write (marked) to 0x8c0986e5a8c8 of 8 bytes by interrupt on cpu 3:
skb_queue_tail+0xcc/0x120
__netlink_sendskb+0x55/0x80
netlink_broadcast_filtered+0x465/0x7e0
nlmsg_notify+0x8f/0x120
rtnl_not
