diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-15 19:17:45 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-18 13:21:54 +0200 |
| commit | f2f316e287e6c2e3a1c5bab8d9b77ee03daa0463 (patch) | |
| tree | 409c93d609b8093922db66f191223fd3d408d070 /include | |
| parent | igmp: Fix data-races around sysctl_igmp_qrv. (diff) | |
| download | linux-f2f316e287e6c2e3a1c5bab8d9b77ee03daa0463.tar.xz linux-f2f316e287e6c2e3a1c5bab8d9b77ee03daa0463.zip | |
tcp: Fix data-races around keepalive sysctl knobs.
While reading sysctl_tcp_keepalive_(time|probes|intvl), they can be changed
concurrently. Thus, we need to add READ_ONCE() to their readers.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/tcp.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 1636c55e798b..204478d5d388 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1493,21 +1493,24 @@ static inline int keepalive_intvl_when(const struct tcp_sock *tp) { struct net *net = sock_net((struct sock *)tp); - return tp->keepalive_intvl ? : net->ipv4.sysctl_tcp_keepalive_intvl; + return tp->keepalive_intvl ? : + READ_ONCE(net->ipv4.sysctl_tcp_keepalive_intvl); } static inline int keepalive_time_when(const struct tcp_sock *tp) { struct net *net = sock_net((struct sock *)tp); - return tp->keepalive_time ? : net->ipv4.sysctl_tcp_keepalive_time; + return tp->keepalive_time ? : + READ_ONCE(net->ipv4.sysctl_tcp_keepalive_time); } static inline int keepalive_probes(const struct tcp_sock *tp) { struct net *net = sock_net((struct sock *)tp); - return tp->keepalive_probes ? : net->ipv4.sysctl_tcp_keepalive_probes; + return tp->keepalive_probes ? : + READ_ONCE(net->ipv4.sysctl_tcp_keepalive_probes); } static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp) |