diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-20 19:50:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-03 13:00:47 +0300 |
| commit | c4e6029a85c8459482284f0edabd1b8fe2909011 (patch) | |
| tree | 36b35a1b2c34702d482f08b081a26e0342b68ea1 /net/ipv4/tcp.c | |
| parent | 83edb788e69a0d5ad40ba5be6a60d6db265d0500 (diff) | |
| download | linux-c4e6029a85c8459482284f0edabd1b8fe2909011.tar.xz | |
tcp: Fix a data-race around sysctl_tcp_autocorking.
[ Upstream commit 85225e6f0a76e6745bc841c9f25169c509b573d8 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/ipv4/tcp.c')
| -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 f1fd26bb199c..78460eb39b3a 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -698,7 +698,7 @@ 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; } |