linux-kernel - [PATCH net-next v3 9/9] Revert "net: do not leave a dangling sk pointer, when socket creation fails"

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Message-Id: <20241014153808.51894-10-ignat@cloudflare.com>
Date: Mon, 14 Oct 2024 16:38:08 +0100
From: Ignat Korchagin <ignat@...udflare.com>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Marcel Holtmann <marcel@...tmann.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	Luiz Augusto von Dentz <luiz.dentz@...il.com>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Alexander Aring <alex.aring@...il.com>,
	Stefan Schmidt <stefan@...enfreihafen.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	David Ahern <dsahern@...nel.org>,
	Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	linux-bluetooth@...r.kernel.org,
	linux-can@...r.kernel.org,
	linux-wpan@...r.kernel.org
Cc: kernel-team@...udflare.com,
	kuniyu@...zon.com,
	alibuda@...ux.alibaba.com,
	Ignat Korchagin <ignat@...udflare.com>
Subject: [PATCH net-next v3 9/9] Revert "net: do not leave a dangling sk pointer, when socket creation fails"

This reverts commit 6cd4a78d962bebbaf8beb7d2ead3f34120e3f7b2.

inet/inet6->create() implementations have been fixed to explicitly NULL the
allocated sk object on error.

A warning was put in place to make sure any future changes will not leave
a dangling pointer in pf->create() implementations.

So this code is now redundant.

Suggested-by: Kuniyuki Iwashima <kuniyu@...zon.com>
Signed-off-by: Ignat Korchagin <ignat@...udflare.com>
---
 net/core/sock.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index 083d438d8b6f..a9391cb796a2 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -3830,9 +3830,6 @@ void sk_common_release(struct sock *sk)
 
 	sk->sk_prot->unhash(sk);
 
-	if (sk->sk_socket)
-		sk->sk_socket->sk = NULL;
-
 	/*
 	 * In this point socket cannot receive new packets, but it is possible
 	 * that some packets are in flight because some CPU runs receiver and
-- 
2.39.5