linux-kernel - Re: [syzbot] [net?] general protection fault in add_wait

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Message-ID: <20250204003234.2063-1-hdanton@sina.com>
Date: Tue,  4 Feb 2025 08:32:33 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+9d55b199192a4be7d02c@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] general protection fault in add_wait_queue

On Mon, 03 Feb 2025 01:57:20 -0800
> syzbot found the following issue on:
> 
> HEAD commit:    c2933b2befe2 Merge tag 'net-6.14-rc1' of git://git.kernel...
> git tree:       net-next
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12418518580000

#syz test

--- x/net/vmw_vsock/af_vsock.c
+++ y/net/vmw_vsock/af_vsock.c
@@ -824,13 +824,12 @@ static void __vsock_release(struct sock
 	 */
 	lock_sock_nested(sk, level);
 
-	sock_orphan(sk);
-
 	if (vsk->transport)
 		vsk->transport->release(vsk);
 	else if (sock_type_connectible(sk->sk_type))
 		vsock_remove_sock(vsk);
 
+	sock_orphan(sk);
 	sk->sk_shutdown = SHUTDOWN_MASK;
 
 	skb_queue_purge(&sk->sk_receive_queue);
--