diff options
| author | Eric Dumazet | 2023-07-19 21:28:53 +0000 |
|---|---|---|
| committer | Jakub Kicinski | 2023-07-20 12:34:18 -0700 |
| commit | 9df5335ca974e688389c875546e5819778a80d59 (patch) | |
| tree | abb25288680549c36d2833bb7b977e1becbc33c9 /net/ipv4 | |
| parent | 3a037f0f3c4bfe44518f2fbb478aa2f99a9cd8bb (diff) | |
tcp: annotate data-races around tp->linger2
do_tcp_getsockopt() reads tp->linger2 while another cpu
might change its value.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-8-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 9f74ac16f1c1..2cf129a0c00b 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3585,11 +3585,11 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname, case TCP_LINGER2: if (val < 0) - tp->linger2 = -1; + WRITE_ONCE(tp->linger2, -1); else if (val > TCP_FIN_TIMEOUT_MAX / HZ) - tp->linger2 = TCP_FIN_TIMEOUT_MAX; + WRITE_ONCE(tp->linger2, TCP_FIN_TIMEOUT_MAX); else - tp->linger2 = val * HZ; + WRITE_ONCE(tp->linger2, val * HZ); break; case TCP_DEFER_ACCEPT: @@ -3997,7 +3997,7 @@ int do_tcp_getsockopt(struct sock *sk, int level, READ_ONCE(net->ipv4.sysctl_tcp_syn_retries); break; case TCP_LINGER2: - val = tp->linger2; + val = READ_ONCE(tp->linger2); if (val >= 0) val = (val ? : READ_ONCE(net->ipv4.sysctl_tcp_fin_timeout)) / HZ; break; |