diff options
| author | Eric Dumazet <edumazet@google.com> | 2024-10-02 17:30:40 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-04 15:34:39 -0700 |
| commit | 5a9071a760a61b00260334ad576fe60debafaafc (patch) | |
| tree | 12c4ab5c51e735e4a18e4dbc2b3113d417456fbf /net/ipv4/inet_connection_sock.c | |
| parent | d454184bba235d3a5d1ff4b30597b43a08c00f70 (diff) | |
tcp: annotate data-races around icsk->icsk_pending
icsk->icsk_pending can be read locklessly already.
Following patch in the series will add another lockless read.
Add smp_load_acquire() and smp_store_release() annotations
because following patch will add a test in tcp_write_timer(),
and READ_ONCE()/WRITE_ONCE() alone would possibly lead to races.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20241002173042.917928-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/inet_connection_sock.c')
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 2c5632d4fddb..8c53385cc808 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -775,7 +775,8 @@ void inet_csk_clear_xmit_timers(struct sock *sk) { struct inet_connection_sock *icsk = inet_csk(sk); - icsk->icsk_pending = icsk->icsk_ack.pending = 0; + smp_store_release(&icsk->icsk_pending, 0); + icsk->icsk_ack.pending = 0; sk_stop_timer(sk, &icsk->icsk_retransmit_timer); sk_stop_timer(sk, &icsk->icsk_delack_timer); @@ -790,7 +791,8 @@ void inet_csk_clear_xmit_timers_sync(struct sock *sk) /* ongoing timer handlers need to acquire socket lock. */ sock_not_owned_by_me(sk); - icsk->icsk_pending = icsk->icsk_ack.pending = 0; + smp_store_release(&icsk->icsk_pending, 0); + icsk->icsk_ack.pending = 0; sk_stop_timer_sync(sk, &icsk->icsk_retransmit_timer); sk_stop_timer_sync(sk, &icsk->icsk_delack_timer); |