netdev - [PATCH net-next 2/2] tcp: add more warn of socket in tcp_send_loss

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241020145029.27725-3-kerneljasonxing@gmail.com>
Date: Sun, 20 Oct 2024 22:50:29 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	dsahern@...nel.org,
	ncardwell@...gle.com
Cc: netdev@...r.kernel.org,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net-next 2/2] tcp: add more warn of socket in tcp_send_loss_probe()

From: Jason Xing <kernelxing@...cent.com>

Add two fields to print in the helper which here covers tcp_send_loss_probe().

Link: https://lore.kernel.org/all/5632e043-bdba-4d75-bc7e-bf58014492fd@redhat.com/
Suggested-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Jason Xing <kernelxing@...cent.com>
Cc: Neal Cardwell <ncardwell@...gle.com>
---
 include/net/tcp.h     | 5 ++++-
 net/ipv4/tcp_output.c | 4 +---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index cac7bbff61ce..68eb03758950 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -2434,14 +2434,17 @@ static inline void tcp_warn_once(const struct sock *sk, bool cond, const char *s
 {
 	WARN_ONCE(cond,
 		  "%s"
+		  "cwnd:%u "
 		  "out:%u sacked:%u lost:%u retrans:%u "
 		  "tlp_high_seq:%u sk_state:%u ca_state:%u "
-		  "advmss:%u mss_cache:%u pmtu:%u\n",
+		  "mss:%u advmss:%u mss_cache:%u pmtu:%u\n",
 		  str,
+		  tcp_snd_cwnd(tcp_sk(sk)),
 		  tcp_sk(sk)->packets_out, tcp_sk(sk)->sacked_out,
 		  tcp_sk(sk)->lost_out, tcp_sk(sk)->retrans_out,
 		  tcp_sk(sk)->tlp_high_seq, sk->sk_state,
 		  inet_csk(sk)->icsk_ca_state,
+		  tcp_current_mss((struct sock *)sk),
 		  tcp_sk(sk)->advmss, tcp_sk(sk)->mss_cache,
 		  inet_csk(sk)->icsk_pmtu_cookie);
 }
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 054244ce5117..295bc0741772 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2954,9 +2954,7 @@ void tcp_send_loss_probe(struct sock *sk)
 	}
 	skb = skb_rb_last(&sk->tcp_rtx_queue);
 	if (unlikely(!skb)) {
-		WARN_ONCE(tp->packets_out,
-			  "invalid inflight: %u state %u cwnd %u mss %d\n",
-			  tp->packets_out, sk->sk_state, tcp_snd_cwnd(tp), mss);
+		tcp_warn_once(sk, tp->packets_out, NULL);
 		smp_store_release(&inet_csk(sk)->icsk_pending, 0);
 		return;
 	}
-- 
2.37.3