diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-20 09:50:25 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-22 12:06:18 +0100 |
| commit | 85225e6f0a76e6745bc841c9f25169c509b573d8 (patch) | |
| tree | 8bf2cc8e0de85841b869ea48d64cd07a2caafd82 /net | |
| parent | 1330ffacd05fc9ac4159d19286ce119e22450ed2 (diff) | |
| download | linux-85225e6f0a76e6745bc841c9f25169c509b573d8.tar.bz2 | |
tcp: Fix a data-race around sysctl_tcp_autocorking.
While reading sysctl_tcp_autocorking, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: f54b311142a9 ("tcp: auto corking")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 2faaaaf540ac..a11e5de3a4c3 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -686,7 +686,7 @@ static bool tcp_should_autocork(struct sock *sk, struct sk_buff *skb, int size_goal) { return skb->len < size_goal && - sock_net(sk)->ipv4.sysctl_tcp_autocorking && + READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_autocorking) && !tcp_rtx_queue_empty(sk) && refcount_read(&sk->sk_wmem_alloc) > skb->truesize && tcp_skb_can_collapse_to(skb); |