linux-kernel - Re: [rds-devel] BUG: unable to handle kernel NULL pointer dereference in rds_send

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Date:   Tue, 30 Jan 2018 17:28:16 -0500
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     David Miller <davem@...emloft.net>, santosh.shilimkar@...cle.com,
        rds-devel@....oracle.com,
        bot+aaf54a8c644d559d34dedcf3126aac68a20c9e63@...kaller.appspotmail.com,
        linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [rds-devel] BUG: unable to handle kernel NULL pointer
 dereference in rds_send_xmit

On (01/30/18 14:22), Eric Biggers wrote:
>
> I assume you weren't able to reproduce this?  This crash hasn't been
> seen again,
   :
> I am invalidating the bug for syzbot so it will report the same crash
> signature
> again if it occurs, but if you think there is a real bug feel free to keep
> looking into it.

correct I was not able to reproduce this.  However based on code
inspecion, I came up with

    commit 3db6e0d172c94bd9953a1347c55ffb64b1d2e74f
    rds: use RCU to synchronize work-enqueue with connection teardown

Marking  it invalid sounds good to me.

--Sowmini