diff options
| author | Eric Dumazet <edumazet@google.com> | 2024-10-02 20:30:40 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-05 01:34:39 +0300 |
| commit | 5a9071a760a61b00260334ad576fe60debafaafc (patch) | |
| tree | 12c4ab5c51e735e4a18e4dbc2b3113d417456fbf /include | |
| parent | d454184bba235d3a5d1ff4b30597b43a08c00f70 (diff) | |
| download | linux-5a9071a760a61b00260334ad576fe60debafaafc.tar.xz | |
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 'include')
| -rw-r--r-- | include/net/inet_connection_sock.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index c0deaafebfdc..914d19772704 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -197,7 +197,7 @@ static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what) struct inet_connection_sock *icsk = inet_csk(sk); if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) { - icsk->icsk_pending = 0; + smp_store_release(&icsk->icsk_pending, 0); #ifdef INET_CSK_CLEAR_TIMERS sk_stop_timer(sk, &icsk->icsk_retransmit_timer); #endif @@ -229,7 +229,7 @@ static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what, if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0 || what == ICSK_TIME_LOSS_PROBE || what == ICSK_TIME_REO_TIMEOUT) { - icsk->icsk_pending = what; + smp_store_release(&icsk->icsk_pending, what); icsk->icsk_timeout = jiffies + when; sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); } else if (what == ICSK_TIME_DACK) { |