From 0d687ff07049b52c4701143190ee9644bc3ac4bf Mon Sep 17 00:00:00 2001 From: Kuniyuki Iwashima Date: Tue, 23 Aug 2022 10:46:52 -0700 Subject: [PATCH] net: Fix a data-race around sysctl_net_busy_read. While reading sysctl_net_busy_read, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader. Fixes: 140b2650cf6d ("net: poll/select low latency socket support") Signed-off-by: Kuniyuki Iwashima Signed-off-by: David S. Miller --- net/core/sock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/sock.c b/net/core/sock.c index 95abf4604d884..788c1372663cb 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3367,7 +3367,7 @@ void sock_init_data(struct socket *sock, struct sock *sk) #ifdef CONFIG_NET_RX_BUSY_POLL sk->sk_napi_id = 0; - sk->sk_ll_usec = sysctl_net_busy_read; + sk->sk_ll_usec = READ_ONCE(sysctl_net_busy_read); #endif sk->sk_max_pacing_rate = ~0UL; -- 2.39.5