From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
To: Xin Long <lucien.xin@gmail.com>
Cc: network dev <netdev@vger.kernel.org>,
linux-sctp@vger.kernel.org, davem@davemloft.net,
Neil Horman <nhorman@tuxdriver.com>,
syzkaller-bugs@googlegroups.com
Subject: Re: [PATCH net] sctp: not bind the socket in sctp_connect
Date: Wed, 26 Jun 2019 23:59:15 -0300 [thread overview]
Message-ID: <20190627025915.GA2747@localhost.localdomain> (raw)
In-Reply-To: <35a0e4f6ca68185117c6e5517d8ac924cc2f9d05.1561537899.git.lucien.xin@gmail.com>
On Wed, Jun 26, 2019 at 04:31:39PM +0800, Xin Long wrote:
> Now when sctp_connect() is called with a wrong sa_family, it binds
> to a port but doesn't set bp->port, then sctp_get_af_specific will
> return NULL and sctp_connect() returns -EINVAL.
>
> Then if sctp_bind() is called to bind to another port, the last
> port it has bound will leak due to bp->port is NULL by then.
>
> sctp_connect() doesn't need to bind ports, as later __sctp_connect
> will do it if bp->port is NULL. So remove it from sctp_connect().
> While at it, remove the unnecessary sockaddr.sa_family len check
> as it's already done in sctp_inet_connect.
>
> Fixes: 644fbdeacf1d ("sctp: fix the issue that flags are ignored when using kernel_connect")
> Reported-by: syzbot+079bf326b38072f849d9@syzkaller.appspotmail.com
> Signed-off-by: Xin Long <lucien.xin@gmail.com>
Please give me another day to review this one. Thanks.
next prev parent reply other threads:[~2019-06-27 2:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 8:31 [PATCH net] sctp: not bind the socket in sctp_connect Xin Long
2019-06-27 2:59 ` Marcelo Ricardo Leitner [this message]
2019-06-27 16:21 ` David Miller
2019-06-27 22:32 ` Marcelo Ricardo Leitner
2019-06-29 17:51 ` David Miller
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