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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-20 09:50:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-22 12:06:17 +0100 |
| commit | 2455e61b85e9c99af38cd889a7101f1d48b33cb4 (patch) | |
| tree | 443f16d5217aca317b8ccf5035d62a76d27459d0 /net/ipv4 | |
| parent | e0bb4ab9dfddd872622239f49fb2bd403b70853b (diff) | |
| download | linux-2455e61b85e9c99af38cd889a7101f1d48b33cb4.tar.gz linux-2455e61b85e9c99af38cd889a7101f1d48b33cb4.tar.bz2 linux-2455e61b85e9c99af38cd889a7101f1d48b33cb4.zip | |
tcp: Fix a data-race around sysctl_tcp_tso_rtt_log.
While reading sysctl_tcp_tso_rtt_log, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: 65466904b015 ("tcp: adjust TSO packet sizes based on min_rtt")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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 6e29cf391a64..cf6713c9567e 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1976,7 +1976,7 @@ static u32 tcp_tso_autosize(const struct sock *sk, unsigned int mss_now, bytes = sk->sk_pacing_rate >> READ_ONCE(sk->sk_pacing_shift); - r = tcp_min_rtt(tcp_sk(sk)) >> sock_net(sk)->ipv4.sysctl_tcp_tso_rtt_log; + r = tcp_min_rtt(tcp_sk(sk)) >> READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_tso_rtt_log); if (r < BITS_PER_TYPE(sk->sk_gso_max_size)) bytes += sk->sk_gso_max_size >> r; |