linux-kernel - Re: [PATCH v3] scsi: avoid potential deadloop in iscsi_if

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Message-ID: <d0d2bcf7-9d9d-40f9-335d-ebcdafdf9969@suse.com>
Date:   Wed, 13 Nov 2019 03:29:31 +0000
From:   Lee Duncan <LDuncan@...e.com>
To:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        "wubo (T)" <wubo40@...wei.com>
CC:     "cleech@...hat.com" <cleech@...hat.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "open-iscsi@...glegroups.com" <open-iscsi@...glegroups.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ulrich Windl <Ulrich.Windl@...uni-regensburg.de>,
        Mingfangsen <mingfangsen@...wei.com>,
        "liuzhiqiang (I)" <liuzhiqiang26@...wei.com>
Subject: Re: [PATCH v3] scsi: avoid potential deadloop in iscsi_if_rx func

On 11/12/19 5:37 PM, Martin K. Petersen wrote:
> 
>> In iscsi_if_rx func, after receiving one request through
>> iscsi_if_recv_msg func, iscsi_if_send_reply will be called to try to
>> reply the request in do-loop. If the return of iscsi_if_send_reply
>> func return -EAGAIN all the time, one deadloop will occur.
>>  
>> For example, a client only send msg without calling recvmsg func, 
>> then it will result in the watchdog soft lockup. 
>> The details are given as follows,
> 
> Lee/Chris/Ulrich: Please review!
> 

I believe I already added my Reviewed-by tag. Do you mean past that?
Perhaps I missed something.
-- 
Lee Duncan