Re: [PATCH V4] scsi: avoid potential deadlock in iscsi_if_rx func
From: Martin K. Petersen
Date: Mon Dec 09 2019 - 18:13:33 EST
wubo,
> 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 deadlock 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,
> Signed-off-by: Bo Wu <wubo40@xxxxxxxxxx>
> Reviewed-by: Zhiqiang Liu <liuzhiqiang26@xxxxxxxxxx>
> Reviewed-by: Lee Duncan <LDuncan@xxxxxxxx>
I haven't seen a Reviewed-by: from Lee on this patch.
--
Martin K. Petersen Oracle Linux Engineering