Commit 5ce4645c authored by Eric Dumazet's avatar Eric Dumazet Committed by Jakub Kicinski

tcp: fix races in tcp_abort()

tcp_abort() has the same issue than the one fixed in the prior patch
in tcp_write_err().

In order to get consistent results from tcp_poll(), we must call
sk_error_report() after tcp_done().

We can use tcp_done_with_error() to centralize this logic.

Fixes: c1e64e29 ("net: diag: Support destroying TCP sockets.")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Acked-by: default avatarNeal Cardwell <ncardwell@google.com>
Link: https://lore.kernel.org/r/20240528125253.1966136-4-edumazet@google.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 853c3bd7
......@@ -4576,14 +4576,10 @@ int tcp_abort(struct sock *sk, int err)
bh_lock_sock(sk);
if (!sock_flag(sk, SOCK_DEAD)) {
WRITE_ONCE(sk->sk_err, err);
/* This barrier is coupled with smp_rmb() in tcp_poll() */
smp_wmb();
sk_error_report(sk);
if (tcp_need_reset(sk->sk_state))
tcp_send_active_reset(sk, GFP_ATOMIC,
SK_RST_REASON_NOT_SPECIFIED);
tcp_done(sk);
tcp_done_with_error(sk, err);
}
bh_unlock_sock(sk);
......
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