From: Stephen Hemminger <shemminger@vyatta.com>
Date: Sun, 1 Feb 2009 09:40:17 +0000 (-0800)
Subject: inet: Fix virt-manager regression due to bind(0) changes.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5add300975cf36b1bd30c461105bb938da260f14;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

inet: Fix virt-manager regression due to bind(0) changes.

From: Stephen Hemminger <shemminger@vyatta.com>

Fix regression introduced by a9d8f9110d7e953c2f2b521087a4179677843c2a
("inet: Allowing more than 64k connections and heavily optimize
bind(0) time.")

Based upon initial patches and feedback from Evegniy Polyakov and
Eric Dumazet.

From Eric Dumazet:
--------------------
Also there might be a problem at line 175

if (sk->sk_reuse && sk->sk_state != TCP_LISTEN && --attempts >= 0) {
	spin_unlock(&head->lock);
	goto again;

If we entered inet_csk_get_port() with a non null snum, we can "goto again"
while it was not expected.
--------------------

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index df8e72f07478..9bc6a187bdce 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -172,7 +172,8 @@ tb_found:
 		} else {
 			ret = 1;
 			if (inet_csk(sk)->icsk_af_ops->bind_conflict(sk, tb)) {
-				if (sk->sk_reuse && sk->sk_state != TCP_LISTEN && --attempts >= 0) {
+				if (sk->sk_reuse && sk->sk_state != TCP_LISTEN &&
+				    smallest_size != -1 && --attempts >= 0) {
 					spin_unlock(&head->lock);
 					goto again;
 				}