diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-07-19 21:28:50 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-07-20 12:34:18 -0700 |
| commit | 5ecf9d4f52ff2f1d4d44c9b68bc75688e82f13b4 (patch) | |
| tree | 05188d2c1d64e0c751d5ee48a9523a631efa5a62 /net | |
| parent | 4164245c76ff906c9086758e1c3f87082a7f5ef5 (diff) | |
| download | linux-stable-5ecf9d4f52ff2f1d4d44c9b68bc75688e82f13b4.tar.gz linux-stable-5ecf9d4f52ff2f1d4d44c9b68bc75688e82f13b4.tar.bz2 linux-stable-5ecf9d4f52ff2f1d4d44c9b68bc75688e82f13b4.zip | |
tcp: annotate data-races around tp->keepalive_intvl
do_tcp_getsockopt() reads tp->keepalive_intvl 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/20230719212857.3943972-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index b4f7856dfb16..d55fe014e7c9 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3345,7 +3345,7 @@ int tcp_sock_set_keepintvl(struct sock *sk, int val) return -EINVAL; lock_sock(sk); - tcp_sk(sk)->keepalive_intvl = val * HZ; + WRITE_ONCE(tcp_sk(sk)->keepalive_intvl, val * HZ); release_sock(sk); return 0; } @@ -3559,7 +3559,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname, if (val < 1 || val > MAX_TCP_KEEPINTVL) err = -EINVAL; else - tp->keepalive_intvl = val * HZ; + WRITE_ONCE(tp->keepalive_intvl, val * HZ); break; case TCP_KEEPCNT: if (val < 1 || val > MAX_TCP_KEEPCNT) |