diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-18 20:26:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-29 18:19:21 +0300 |
| commit | 11e8b013d16e5db63f8f76acceb5b86964098aaa (patch) | |
| tree | dacf699ad1cba8e2ccfefd81a9c03c8b64c11d63 /net/ipv4 | |
| parent | ffc388f6f0d65f2a59798d883c63205919e6d452 (diff) | |
| download | linux-11e8b013d16e5db63f8f76acceb5b86964098aaa.tar.xz | |
tcp: Fix a data-race around sysctl_tcp_early_retrans.
[ Upstream commit 52e65865deb6a36718a463030500f16530eaab74 ]
While reading sysctl_tcp_early_retrans, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: eed530b6c676 ("tcp: early retransmit")
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')
| -rw-r--r-- | net/ipv4/tcp_output.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 772dd6241b70..0cbf3d859745 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2735,7 +2735,7 @@ bool tcp_schedule_loss_probe(struct sock *sk, bool advancing_rto) if (rcu_access_pointer(tp->fastopen_rsk)) return false; - early_retrans = sock_net(sk)->ipv4.sysctl_tcp_early_retrans; + early_retrans = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_early_retrans); /* Schedule a loss probe in 2*RTT for SACK capable connections * not in loss recovery, that are either limited by cwnd or application. */ |