diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-13 13:52:04 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-15 11:49:56 +0100 |
| commit | 92c0aa4175474483d6cf373314343d4e624e882a (patch) | |
| tree | ac866e910a3ac09ff6795782a0582697db17dcfb /net/ipv4/tcp_output.c | |
| parent | 8e92d4423615a5257d0d871fc067aa561f597deb (diff) | |
| download | linux-92c0aa4175474483d6cf373314343d4e624e882a.tar.bz2 | |
tcp: Fix a data-race around sysctl_tcp_probe_threshold.
While reading sysctl_tcp_probe_threshold, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: 6b58e0a5f32d ("ipv4: Use binary search to choose tcp PMTU probe_size")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
| -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 7130b405da21..aa757c74dad4 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2367,7 +2367,7 @@ static int tcp_mtu_probe(struct sock *sk) * probing process by not resetting search range to its orignal. */ if (probe_size > tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_high) || - interval < net->ipv4.sysctl_tcp_probe_threshold) { + interval < READ_ONCE(net->ipv4.sysctl_tcp_probe_threshold)) { /* Check whether enough time has elaplased for * another round of probing. */ |