netdev - Re: [PATCH net] net/rds: An rds_sock is added too early to the hash table

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Message-Id: <20190911.160603.1137498967365145823.davem@davemloft.net>
Date:   Wed, 11 Sep 2019 16:06:03 +0200 (CEST)
From:   David Miller <davem@...emloft.net>
To:     ka-cheong.poon@...cle.com
Cc:     netdev@...r.kernel.org, santosh.shilimkar@...cle.com,
        rds-devel@....oracle.com
Subject: Re: [PATCH net] net/rds: An rds_sock is added too early to the
 hash table

From: Ka-Cheong Poon <ka-cheong.poon@...cle.com>
Date: Wed, 11 Sep 2019 02:58:05 -0700

> In rds_bind(), an rds_sock is added to the RDS bind hash table before
> rs_transport is set.  This means that the socket can be found by the
> receive code path when rs_transport is NULL.  And the receive code
> path de-references rs_transport for congestion update check.  This can
> cause a panic.  An rds_sock should not be added to the bind hash table
> before all the needed fields are set.
> 
> Reported-by: syzbot+4b4f8163c2e246df3c4c@...kaller.appspotmail.com
> Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@...cle.com>

Applied.